Regulation No. 143-00 Proposal

Name:Regulation No. 143-00 Proposal
Description:Heavy Duty Dual-fuel Engine Retrofit Systems (HDDF-ERS) - Proposal.
Official Title:Proposal for a New Regulation on Uniform Provisions Concerning the Approval of Heavy Duty Dual-fuel Engine Retrofit Systems (HDDF-ERS) to be Installed on Heavy Duty Diesel Engines and Vehicles.
Country:ECE - United Nations
Date of Issue:2016-09-06
Amendment Level:Original
Number of Pages:48
Vehicle Types:Bus, Car, Component, Heavy Truck, Light Truck
Subject Categories:Miscellaneous, Drafts and Proposals (Current)
Available on InterRegs.NET

Our online subscription service, offering immediate access to our extensive library of global vehicle regulations, standards and legislation. A fully searchable, accurate, user-friendly resource for consolidated regulations that are updated quickly and frequently.

Tell me more | Already a subscriber

Available on SelectRegs.com

Our fast and easy means of purchasing up-to-date global vehicle and component standards and regulations on a pay-as-you-go basis. Pay securely by credit card and your documents are delivered directly and immediately to your computer as PDF files.

Tell me more | Go straight to site

Keywords:

engine, system, retrofit, dual-fuel, approval, regulation, mode, type, application, diesel, fuel, annex, manual, requirements, manufacturer, range, family, paragraph, tests, test, systems, actual, components, number, information, installation, extension, engines, means, emission, demonstration, gas, original, pressure, user, operating, applications, vehicle, authority, applicable, operation, description, production, duty, heavy, accordance, provisions, retrofitted, ger, communication

Text Extract:

All InterRegs documents are formatted as PDF files and contain the full text, tables, diagrams and illustrations of the original as issued by the national government authority. We do not re-word, summarise, cut or interpret the regulatory documents. They are consolidated, published in English, and updated on a regular basis. The following text extract indicates the scope of the document, but does not represent the actual PDF content.

ECE/TRANS/WP.29/2016/110
PROPOSAL FOR A NEW REGULATION ON UNIFORM PROVISIONS
CONCERNING THE APPROVAL OF HEAVY DUTY DUAL-FUEL
ENGINE RETROFIT SYSTEMS (HDDF-ERS) TO BE INSTALLED ON
HEAVY DUTY DIESEL ENGINES AND VEHICLES
(ECE 143-00)
ADOPTED AT THE 170 SESSION – NOVEMBER 2016
PROVISIONAL DATE OF ENTRY INTO FORCE: JUNE 19, 2017

Annexes
Annex 1
Information Document
Appendix 1 – Essential Characteristics of the (Parent) Retrofit System and of the
Demonstration Engine
Appendix 2 – Essential Characteristics of the Engine Retrofit System Family and of the
Application Range
Annex 2
Annex 3
(Reserved)
Information Document Regarding the Actual Applications
Appendix 1 – List of Actual Applications
Annex 4
Annex 5
Annex 6
Arrangement of the Dual-fuel Engine Retrofit System Type Approval Mark
Communication
Dual-fuel Engine Retrofit Systems Intended to be Fitted on Road Vehicles – Requirements
and Tests

1.2. The essence of this Regulation is to complete the elements helping the approval
authority to approve the registration of diesel vehicles retrofitted into dual-fuel vehicles:
(a)
(b)
(c)
(d)
By providing a worldwide recognized type approval scheme of the engine retrofit
system;
By requiring the manufacturer of the engine retrofit system to issue instructions
regarding the devices and components that will complete the engine retrofit
system, and specifications on how to verify the compliance to these instructions;
By requiring the manufacturer of the engine retrofit system to issue instructions
regarding the installation and use/operation of that system on the engines/vehicles
intended to be retrofitted;
By providing guidance for conformity of production requirements regarding the
retrofit operations (manufacture of the retrofit systems as well as installation of
these systems on the engines/vehicles intended to be retrofitted).
2. DUAL-FUEL ENGINE RETROFIT SYSTEM FAMILIES AND APPLICATION RANGES
2.1. The approval of an engine retrofit system according to the provisions of this Regulation
takes into account the characteristics of the components of the engine retrofit system,
the interface with the additional required components and the identification of the
engines that can be retrofitted with the engine retrofit system.
2.2. For the initial type approval the engine retrofit system (the "parent engine retrofit
system") is installed on a demonstration engine.
2.3. In general the tests for the initial type approval consist of engine performance tests (for
example emission tests and the verification of dual-fuel specific requirements).
2.4. When the initial approval is granted, the demonstration engine type can be retrofitted
with the parent engine retrofit system. The approval is also considered valid for similar
engines which do not differ from the tested engine by relevant aspects as specified in
this Regulation. This set of engines is called "application range".
2.5. In order to be mounted on all engines belonging to the application range, the engine
retrofit system may require some adaptations (for example layout, dimension, etc.) and
its components may vary for aspects not relevant as specified in this Regulation. This set
of engine retrofit systems represents the "engine retrofit system family".

Figure 3
Type Approval Extension
2.6.1. When applying for such an extension, the manufacturer shall submit an engine
representative of the additional engines for performing additional tests. The nature of
these tests depends on the desired extension.
2.6.2. A test procedure is introduced to evaluate the emission performance of the retrofitted
engine by comparing the emissions in dual-fuel mode with those in diesel mode.
2.6.3. Tests may be performed on the road using portable emission measurement systems.
2.7. The manufacturer shall notify the approval authority for which engines in the application
range an engine retrofit system has been developed and will be produced. This set of
engine retrofit systems represents the "actual applications".
3. CONFORMITY OF PRODUCTION REQUIREMENTS
3.1. The implementation of and a schedule for conformity of production tests shall be
necessary to ensure the quality of the retrofit systems and their application.
3.2. Conformity of production tests shall only be performed on actual applications.

2.3.3. "Application range" means a grouping of engine systems from which engines may be
selected by the engine retrofit system manufacturer to become an actual application.
2.3.4. "Demonstration engine" means the retrofitted dual-fuel engine used at type approval
for demonstrating compliance with the requirements of this Regulation.
2.3.5. "EEV engine" means an engine approved to the requirements of row C of Tables 1 and
2 of Paragraph 5.2.1. of Regulation No. 49.
2.3.6. "Euro V engine" means an engine approved to the requirements of row B2 of
Tables 1 and 2 of Paragraph 5.2.1. of Regulation No. 49.
2.3.7. "Engine retrofit system or Heavy Duty Dual-Fuel Engine Retrofit System
(HDDF-ERS)" means a retrofit system for a heavy duty diesel engine which enables its
operation either in diesel mode or in dual-fuel mode.
2.3.8. "Engine retrofit system family" means a retrofit system manufacturer’s grouping of
engine retrofit systems which through their design, as defined in this Regulation, have
similar retrofitting characteristics.
2.3.9. "Engine retrofit system manufacturer" means the person or body who is responsible
to the approval authority for all aspects of the type approval of the engine retrofit system
and for ensuring the conformity of production of that system.
2.3.10. "Installation manual" or "engine retrofit system installation manual" means the
manual provided by the manufacturer of the engine retrofit system that includes the
information, the specifications, and the tests that are necessary for installing and using
the engine retrofit system in a retrofitted dual-fuel vehicle
2.3.11. "Original engine system or original engine" means the diesel engine system prior to
the installation of the engine retrofit system.
2.3.12. "Original engine family" means the family of the original engine system as type
approved according to Regulation No. 49.
2.3.13. "Parent engine retrofit system" means an engine retrofit system used for
demonstrating compliance at type approval with the requirements of this Regulation.
2.3.14. "Passive CAN communication" means communication via a CAN bus without actively
requesting or sending CAN messages ("listen-only").
2.3.15. "R49 original emission limits" means the emission limits as defined in
Regulation No. 49 to which the original engine system was approved.
2.3.16. "Retrofit system or dual-fuel retrofit system" means a retrofit system for a heavy duty
diesel vehicle which enables the operation of their engine either in diesel mode or in
dual-fuel mode.

4. APPLICATION FOR APPROVAL
4.1. Application for Approval of a Dual-fuel Engine Retrofit System Family
4.1.1. The application for approval of a dual-fuel engine retrofit system family shall be
submitted by the engine retrofit system manufacturer or by his duly accredited
representative.
4.2. Information Package
4.2.1. The application for approval shall be accompanied by an information package describing
the demonstration retrofit system and engine, the retrofit system family and the
application range:
4.2.1.1. Demonstration retrofit system and engine
(a)
(b)
(c)
(d)
Description of the demonstration engine retrofit system (including the list of the
components);
Description of the demonstration engine;
Installation manual of the demonstration engine retrofit system on the
demonstration engine;
User manual.
The installation manual shall be provided in the English language and, upon request of
the approval authority, in the language of the country of the authority.
4.2.1.2. Retrofit System Family and Application Range
(a)
(b)
(c)
Description of the engine retrofit system family (including the list of the
components);
Description of the application range;
The elements demonstrating compliance with and required by this Regulation.
4.2.1.3. Actual Application(s)
(a)
(b)
(c)
Description of the actual application(s);
The installation manuals of the engine retrofit systems for all the actual
applications, including the description of any modification of the engine system
(hardware or software) required for the installation of the engine retrofit system;
The declaration of compliance and notification form in Annex 3 properly filled in.
4.2.2. The content of the information package shall comply with the requirements specified in
Annex 1 and its Appendixes 1 and 2.

5.2.2. All dual-fuel engine retrofit systems shall be identified by the plate described in 5.2.1.
which shall be permanently fixed on the body of the vehicle.
5.2.3. The engine retrofit system manufacturer shall demonstrate to the type approval authority
that a system is established to permit unrestricted access to the list of the components of
the retrofit system through the contact details marked on the plate.
5.2.3.1. The approval number of the system, and some other easily accessible information of the
engine or the vehicle (e.g. engine code, licence plate number, etc.) shall be sufficient to
retrieve the correct list of the components of the retrofit system.
6. ACTUAL APPLICATIONS
6.1. An approved engine retrofit system shall only be installed on an engine system
belonging to its actual applications.
6.2. An engine system belongs to the actual applications when the engine retrofit system
manufacturer has notified the type approval authority that this engine system is added to
the actual applications.
6.2.1. The engine retrofit system manufacturer may notify the type approval authority of engine
systems which are included as actual applications at type approval.
6.3. Together with the notification, the engine retrofit system manufacturer shall provide the
installation manual of the system, compliant with Paragraph 12. of Annex 6 and specific
for each actual application, the compliance statement, as well as the updated list of
actual applications in accordance with Annex 3.
6.3.1. In addition to the Notices specified in Paragraphs 5.1.3. and 5.1.4., when notified, the
actual applications of the approved dual-fuel engine retrofit system family shall be
communicated to the Parties to the Agreement applying this Regulation by means of a
form conforming to the model in Annex 3 to this Regulation.
6.4. The engine retrofit system manufacturer shall ensure that actual applications shall be
compliant with the requirements of this Regulation.
6.5. The engine retrofit system manufacturer shall only supply engine retrofit systems for
engine systems which belong to the actual applications.
6.6. The engine retrofit system manufacturer shall maintain records at the manufacturer's
facility which contain all test data, engineering analyses, and other information which
provides the basis for the compliance statement. The manufacturer shall provide such
information to the type approval authority upon request.

7.5.2. Functional Safety
7.5.2.1. If CAN messages are modified in dual-fuel mode then it shall be demonstrated to the
approval authority that the original safety functions of the engine or the vehicle are not
inhibited.
7.5.2.2. The specifications of any modified CAN message shall be part of the documentation
submitted at type approval.
7.5.3. Electrical Safety
7.5.3.1. The electrical connections between the engine retrofit system and the engine/vehicle
shall be designed according to the applicable ISO/SAE standards.
7.5.4. EMC
7.5.4.1. The engine retrofit system shall be compliant with Regulation No. 10.
8. ENGINE RETROFIT SYSTEM FAMILY AND APPLICATION RANGE
8.1. Engine Retrofit System Family
8.1.1. The parent engine retrofit system of an engine retrofit system family is the engine retrofit
system that is used for performing the demonstration tests specified in Annex 6 during
the type approval of the engine retrofit system for its initial application range.
8.1.2. Each member of the engine retrofit system family shall have the characteristics specified
in Paragraph 3. of Annex 6 in common with the parent engine retrofit system.
8.1.3. The engine retrofit system manufacturer shall provide the list of the engine retrofit
systems belonging to the engine retrofit system family in accordance with Appendix 2 of
Annex 1.
8.2. Application Range of an Engine Retrofit System
8.2.1. Initial Application Range
8.2.1.1. The initial application range of an engine retrofit system shall be the original engine
family to which the demonstration engine belongs.
9. CONFORMITY OF PRODUCTION
9.1. The Conformity Of Production (COP) procedures shall comply with those set out in the
1958 Agreement, Appendix 2 (E/ECE/324 - E/ECE/TRANS/505/Rev.2).
9.2. The measures taken to guarantee conformity of production shall fulfil the requirements of
Paragraph 2. of Appendix 2 to the 1958 Agreement.

11. MODIFICATION AND EXTENSION OF APPROVALS
11.1. Modification and Extension of the Approval of a Dual-fuel Engine Retrofit System
11.1.1. The authority that granted the type approval shall be notified of any modification to the
engine retrofit system. The authority will then assess whether or not the engine retrofit
system still complies with the requirements for inclusion in the appropriate family.
The authority may require a further test report from the technical service responsible for
conducting the tests in order to assist in its assessment.
11.1.2. Any modification or extension of the application range, as defined in Paragraph 11.2., is
dealt with as a modification or extension of the type approval of the dual-fuel engine
retrofit system.
11.1.3. When the type approval authority approves the modification, a reference to the formal
notification of that approval shall be included in the installation manual.
11.1.4. Confirmation or refusal of approval, specifying the alteration, shall be communicated by
the procedure specified in Paragraph 5. to the Parties to the 1958 Agreement applying
this Regulation.
11.1.5. The competent authority issuing the extension of approval shall assign a series number
for such an extension and inform thereof the other Parties to the 1958 Agreement
applying to this Regulation of that number by means of the Communication specified in
Annex 5 to this Regulation.
11.2 Extension of the Application Range
11.2.1. Any extension of the application range shall be subject to an extension of the type
approval.
11.2.2. The technical requirements of this Regulation and the tests relative to the extension of
the application range of an engine retrofit system as specified in Paragraph 10. of Annex
6 shall be fulfilled.
11.2.3. If the demonstration engine meets the requirements of Paragraph 10. of Annex 6, the
application range is extended with the original engine family of the demonstration engine.
12. PRODUCTION DEFINITIVELY DISCONTINUED
12.1. If the holder of the approval completely ceases to manufacture a type of engine retrofit
system approved in accordance with this Regulation, he shall so inform the authority that
granted the approval. Upon receiving the relevant communication, that authority shall
inform thereof the other Parties to the 1958 Agreement applying this Regulation by
means of the Communication specified in Annex 5 to this Regulation.

ANNEX 1
INFORMATION DOCUMENT
1. INFORMATION DOCUMENT
1.1. General
This information document is related to the approval of Heavy Duty Dual-Fuel Engine Retrofit
Systems (HDDF-ERS) in accordance with Regulation No. XXX. It refers to measures to be
taken against the emission of gaseous and particulate pollutants from compression-ignition
engines for use in vehicles and retrofitted to dual-fuel operation with said engine retrofit system.
Parent engine retrofit system/Engine retrofit system
0. General
0.1. Make (name of undertaking): ..........................................................................................................
0.2. Type and commercial description (mention any variants): .............................................................
0.3. Means and location of identification of type, if marked on the vehicle: ...........................................
0.4. Category of vehicle (if applicable): ..................................................................................................
0.5. Category of engine: diesel and NG-H/NG-L/NG-HL/LNG/LNG /LPG fuelled
0.6. Name and address of engine retrofit system manufacturer: ..........................................................
0.7. Location of statutory plates and inscriptions and method of affixing: .............................................
0.8. In the case of components and separate technical units, location and method of affixing of the
ECE approval mark: .......................................................................................................................
0.9. Address(es) of assembly plant(s): .................................................................................................
Appendices:
1. Essential characteristics of the (parent) engine retrofit system (see Appendix 1 of this Annex).
2. Essential characteristics of the engine retrofit system family (see Appendix 2 of this Annex).
3. List further attachments, if any.
Date and place:...............................................................................................................................................

1.1.2.2.
Pressure regulator
1.1.2.2.1.
Make ..........................................................................................................................................
1.1.2.2.2.
Type ..........................................................................................................................................
1.1.2.2.3.
Outlet pressure
................................................................................................................ kPa
1.1.2.2.4.
Certification number ..................................................................................................................
1.1.2.2.5.
Identification ...............................................................................................................................
1.1.2.2.6.
Number of main adjustment points ............................................................................................
1.1.2.2.7.
Description of principle of adjustment through main adjustment points ....................................
1.1.2.2.8.
Number of idle adjustment points .............................................................................................
1.1.2.2.9.
Description of principle of adjustment through idle adjustment points ......................................
1.1.2.2.10. Other adjustment possibilities: if so and which (description and drawings) ..............................
1.1.2.3.
Mixing unit: Yes/No
1.1.2.3.1.
Number .....................................................................................................................................
1.1.2.3.2.
Make .........................................................................................................................................
1.1.2.3.3.
Type ..........................................................................................................................................
1.1.2.3.4.
Operating pressure(s):
..................................................................................................... kPa
1.1.2.4.
Gas injection device(s) or injector(s): Yes/No
1.1.2.4.1.
Make .........................................................................................................................................
1.1.2.4.2.
Type ..........................................................................................................................................
1.1.2.4.3.
Identification ..............................................................................................................................
1.1.2.4.4.
Operating pressure:
......................................................................................................... kPa
1.1.2.5.
Electronic control unit
1.1.2.5.1.
Make ..........................................................................................................................................
1.1.2.5.2.
Type ...........................................................................................................................................
1.1.2.5.3.
Software calibration identification ..............................................................................................

1.1.2.11.
Any other emission or safety related components:
................................................................
1.2.
Demonstration engine
1.2.1.
Manufacturer of the engine: .......................................................................................................
1.2.2.
Manufacturer’s engine code (as marked on the engine or other means of identification): ........
1.2.3.
Approval number (if appropriate) including fuel identification: ..................................................
1.2.4.
Modifications to the engine necessary to mount the retrofit system: ........................................

4. APPLICATION RANGE
4.1. Provide the approval number of each original engine family included in the application range:
First approval and following
extensions
Approval No.: ........................................
granted on: [dd/mm/yyyy]
Extension No.: ......................................
granted on: [dd/mm/yyyy]
Engines
[Original
engine
family
approval
number]
[Original
engine
family
approval
number]

ANNEX 3
INFORMATION DOCUMENT REGARDING THE ACTUAL APPLICATIONS
1. The following is the model of the required compliance statement and notification form:
"[Name of engine retrofit system manufacturer] attests that the actual application
[Identification of the actual application] complies with all requirements of Regulation XXX.
[Name of engine retrofit system manufacturer] makes this statement in good faith, after
having performed an appropriate engineering evaluation of the emissions performance of the
actual application over the applicable range of operating and ambient conditions.
Herewith [Name of engine retrofit system manufacturer] notifies the approval authority that
the actual application [Identification of the actual application] is added to the actual
applications. The most recent list of actual applications is attached to this information
document.
Appendix: List of actual applications.
Date: [Date]
Place: [Place]
[Stamp and signature of the engine retrofit system manufacturer’s representative] "
1.1. The information of all the actual applications together with each specific retrofit system in
accordance with the table in Appendix 1 of this annex shall be attached as an appendix.

ANNEX 4
ARRANGEMENT OF THE DUAL-FUEL ENGINE RETROFIT SYSTEM TYPE
APPROVAL MARK
1. The approval mark shall consist of:
1.1. A circle surrounding the letter "E" followed by the distinguishing number of the country which
has granted the approval;
1.2.
A symbol indicating the fuel type, where the symbol "
" indicates a CNG retrofit system, a "#"
means LPG, a "%" means LNG.
1.3. The number of this Regulation, followed by the letter "R", a dash and the approval number to
the right of the circle defined below. The approval number consists of the retrofit system type
approval number, which appears in the communication form for this type approval (see
Paragraph 5.1.2. of the Regulation and Annex 5) preceded by two figures indicating the latest
series of amendments to this Regulation.
a = min. 8mm
2. The above approval mark affixed to the plate of a dual-fuel retrofit system, shows an approval
from the Netherlands (E 4), pursuant to Regulation No. [XXX] under approval number 001234.
The symbol " " indicates a CNG retrofit system. The first two digits of the approval number
indicate that approval was granted in accordance to the requirement of Regulation No. [XXX] in
its original form.

Mixing unit:
..................................................................................................................................
Gas injection device or injector:
..................................................................................................
Electronic control unit:
..................................................................................................................
Software calibration identification number(s): .................................................................................
Pressure/temperature sensor:
.....................................................................................................
Gas filter unit:
..............................................................................................................................
Any other emission or safety related components: .........................................................................
2.
Demonstration engine
Manufacturer of the engine: ..........................................................................................
Approval number: ............................................................................................................................
Engine code: ...................................................................................................................................
Modifications to the engine necessary to mount the retrofit system: ..............................................
3.
Fuel type (LPG, NG-H, NG-L, NG–HL, LNG, LNG ,.................................................................. )
Self-adaptive: Yes/No
4.
GER
test result (if applicable): ....................................................................................................
5.
GER
test result (if applicable): ..................................................................................................
6.
Emission test results:
Engine tests - first approval or application range extension
Gaseous test fuel(s) used: ..............................................................................................................
ETC test results:
Operating modes
NMHC
g/kWh
CH
g/kWh
CO
g/kWh
NO
g/kWh
PM
g/kWh
Diesel mode before retrofit
Diesel mode after retrofit
Dual-fuel mode

Non-return valve:
.........................................................................................................................
Gas tube pressure relief valve:
...................................................................................................
Flexible fuel line/hose:
.................................................................................................................
Fuel rail:
......................................................................................................................................
Mixing unit:
...................................................................................................................................
Gas injection device or injector:
...................................................................................................
Electronic control unit:
.................................................................................................................
Software calibration identification number(s): .................................................................................
Pressure/temperature sensor:
.....................................................................................................
Gas filter unit:
...............................................................................................................................
Any other emission or safety related components: .........................................................................
9.
Trade name or mark: .......................................................................................................................
10.
Engine retrofit system manufacturer's name and address: ............................................................
11.
Name and address of engine retrofit system manufacturer's representative, if applicable: ...........
12.
Approval submission date: ..............................................................................................................
13.
Technical Service responsible for conducting approval tests: ........................................................
14.
Date of report issued by that Service: .............................................................................................
15.
No. of report issued by that Service: ...............................................................................................

ANNEX 6
DUAL-FUEL ENGINE RETROFIT SYSTEMS INTENDED TO BE FITTED ON
ROAD VEHICLES – REQUIREMENTS AND TESTS
1. DEFINITIONS
1.1. Reserved
For the purpose of this Annex, the following definitions shall apply in addition to the
definitions of Paragraph 2. of this Regulation and to the definitions of Regulation No. 49:
2. DETERMINATION OF THE DIESEL FUEL REPLACEMENT BY A DUAL-FUEL ENGINE
RETROFIT SYSTEM
2.1. The following process is applicable for determining the diesel fuel replacement by a
dual-fuel engine retrofit system.
2.1.1. The demonstration engine is submitted in dual-fuel mode to an ETC test and to an ESC test
as specified in Annex 4A of Regulation No. 49.
2.1.2. The Gas Energy Ratio (GER), as defined in Paragraph 2.1. of Annex 11 of Regulation
No. 49, is calculated over the ETC test cycle.
2.1.3. The GER of the demonstration engine over the ETC test cycle shall be higher than 10%.
2.1.4. The ETC and ESC tests referred to in Paragraph 2.1.1. shall be performed consecutively, in
either order.
2.1.5. The fuels used in both tests shall be the same as well as all other test conditions, including
the test bench.
2.1.6.
The average gas ratio over this ESC test cycle (GER
) is calculated using the weighted
average of the consumption of both fuels over this cycle.
2.1.7. The absolute difference between the average gas ratio calculated over this ETC test cycle
(GER ) and the average gas ratio calculated over this ESC test cycle (GER ) shall not
exceed 20% of the GER .
3. CHARACTERISTICS AND CRITERIA DEFINING AN ENGINE RETROFIT SYSTEM
FAMILY
3.1. An engine retrofit system family is defined by design characteristics. These shall be
common to all engine retrofit systems within the engine retrofit system family.
3.1.1. An engine retrofit system can only be a member of the same engine retrofit system family as
the parent engine retrofit system when it shares with that engine retrofit system the
characteristics defined in Paragraph 3.2.

4.3.1. Unavailability of Gaseous Fuel
The unavailability of gaseous fuel when operating in dual-fuel mode can be caused by the
following cases:
4.3.1.1. Empty Gaseous Fuel Tank
When the gas quantity in the tank exceeds the level that caused the activation of the switchback,
the dual-fuel mode shall be reactivated as soon as possible.
4.3.1.2. Malfunctioning Gas Supply
The gas injection system electronics, fuel quantity and timing actuator(s) shall be monitored
for circuit continuity (i.e. open circuit or short circuit) and functional failure when the engine
operates in dual-fuel mode.
As soon as the gas diagnostic system concludes that the malfunction is no longer present or
when the OBD information is erased by a scan tool, the dual-fuel mode may be reactivated.
4.3.2. Malfunction(s) Detected by the OBD System of the Original Engine or the Dual-fuel Retrofit
OBD System.
The dual-fuel mode may only be reactivated when the cause of the malfunction is removed
and the OBD information is erased by a scan tool.
4.4. Dual-fuel Indicators
4.4.1. Dual-fuel Operating Mode Indicator
(a)
(b)
(c)
(d)
(e)
A dual-fuel engine retrofit system shall have a visual indicator indicating to the driver
the mode under which the engine operates (dual-fuel mode or diesel mode).
The characteristics and the location of this indicator are left to the discretion of the
engine retrofit system manufacturer and may be part of an already existing visual
indication system.
This indicator may be completed by a message display. The system used for
displaying the messages referred to in this point may be the same as the ones used
for OBD, correct operation of NO control measures, or other maintenance purposes.
The visual element of the dual-fuel operating mode indicator shall not be the same as
the one used for the purposes of OBD (that is, the MI – Malfunction Indicator), for the
purpose of ensuring the correct operation of NO control measures, or for other
engine maintenance purposes.
Safety alerts always have display priority over the operating mode indication.
4.4.1.1. The dual-fuel system shall warn the driver by means of the dual-fuel mode indicator or an
audio signal (or both) when the engine operation is forced to diesel mode as required by
Paragraph 4.3.

5.2.3. Laboratory Tests
The demonstration engine shall be tested in diesel mode and in dual-fuel mode. The ETC
and ESC test cycles shall be used. The emissions to be measured are shown in Table 1.
The average gas ratios over the ESC test cycle (GER ) and over the ETC test cycle
(GER ) shall be determined in accordance with Paragraph 2.
Table 1
Laboratory Tests to be Performed by the Demonstration Engine
Diesel Mode
Dual-fuel Mode
ETC NMHC; CO; NO ; PM NMHC; CH ; CO; NO ; PM
ESC HC; CO; NO ; PM GER determination only
5.3. Emission Limits for Dual-fuel Engines Retrofitted with an Engine Retrofit System:
5.3.1. Diesel Mode After Retrofit
The exhaust emissions of the engine operating in diesel mode shall not exceed the
Regulation No. 49 original emission limits.
5.3.2. Dual-fuel Mode After Retrofit
The exhaust emissions of the demonstration engine operating in dual-fuel mode shall not
exceed the emission limits specified in this paragraph. No deterioration factors shall be
applied as the engine and components are already aged.
5.3.2.1. CO, NO , PM emissions
The CO, NO and PM emission limits applicable for type 2B dual-fuel engines as specified in
Regulation No. 49 shall apply.
5.3.2.2. THC, NMHC, CH emissions
5.3.2.2.1. For LPG engines the THC emission limit applicable for type 2B LPG dual-fuel engines as
specified in Regulation No. 49 shall apply.
5.3.2.2.2. For NG engines and at the request of the engine retrofit system manufacturer in agreement
with the type approval authority, the hydrocarbon emissions shall comply with either
Paragraph 5.3.2.2.3. or Paragraph 5.3.2.2.4.
5.3.2.2.3. The hydrocarbon emission limit applicable for type 2B NG dual-fuel engines as specified in
Regulation No. 49 shall apply.

7.2. The dual-fuel engine retrofit system OBD shall be submitted to the following tests carried out
on the demonstration engine:
(a)
(b)
(c)
In diesel mode the original Malfunction Indicator (MI) shall activate due to the
electrical disconnection of any original emission-related component;
In dual-fuel mode the original MI shall activate due to the electrical disconnection of
any original emission-related component that is in use during dual-fuel operation. The
engine retrofit system shall switch back to diesel operation as soon as the original MI
is activated.
In dual-fuel mode an automatic switch to diesel mode shall occur due to replacement
of any dual-fuel emission-related component with a deteriorated or defective
component or electronic simulation of such a failure.
7.3. Fault codes referring to malfunctions of the gas emission-related components and their
electrical connections shall be stored in the dual-fuel ECU. The fault codes shall be
available through the OBD bus or through a dedicated communication line.
7.4. The engine retrofit system manufacturer shall provide specific instructions and tools to read
out the fault codes referred to in Paragraph 7.3. of this annex in the case of a dedicated
communication line.
8. REQUIREMENTS TO ENSURE THE CORRECT OPERATION OF NO CONTROL
MEASURES
8.1. If the MI is activated the system shall automatically switch to diesel mode and stay in that
mode until the issue causing the MI activation is fixed.
8.2. In this way the dual-fuel engine retrofit system enables the retrofitted engine to remain
compliant with the requirements to ensure the correct operation of NO control measures
specified in Paragraph 5.5. of Regulation No. 49.
9. DURABILITY REQUIREMENTS
9.1. The applicant shall ensure that the dual-fuel engine retrofit system when used and
maintained according to the manufacturer’s instructions will comply with the applicable
provisions during normal operation over a useful life of 4,000 operating hours or a service
life of 6 years, whichever occurs first.
9.2. The dual-fuel engine retrofit system submitted to the durability tests as specified in
Regulation No. 67 or Regulation No. 110, as applicable, shall be used to demonstrate the
exhaust emission requirements as specified in Paragraph 5. of this annex.
10. REQUIREMENTS AND TESTS FOR THE EXTENSION OF THE APPLICATION RANGE
10.1. TESTS AND REQUIREMENTS
An engine representative of the desired extension of the application range shall be tested in
accordance with the provisions set out in Paragraph 5.2.2. or 10.1.1. at the choice of the
dual-fuel engine retrofit system manufacturer. Engine tests in accordance with
Paragraph 5.2.2. are always required for the extension of an application range with an
engine family equipped with EGR.

The test procedures shall comply with the applicable provisions of Paragraph 5. and the
PEMS testing procedures defined in Annex 8 and Appendix 5 of Annex 15 of the 06 series
of amendments to Regulation 49 (R49r06) unless specified otherwise in this paragraph. The
work and/or CO based windowing approach and the use of conformity factors are not
applicable.
PM or equivalent (e.g. PN) testing is not applicable until the necessary procedures are
implemented in R49r06.
10.1.1.2. OBD Requirements and Tests
The representative engine equipped with the dual-fuel retrofit system installed in the vehicle
shall comply with the provisions set out in Paragraph 7. of this annex.
10.1.1.3. Power Measurement
11. FUELS
11.1. General
Upon agreement with the approval authority the power may be determined by performing a
full load acceleration according to R49r06, Annex 8, Appendix 4 or by any other suitable
method.
The engine retrofit system manufacturer shall ensure compliance with the specifications of
reference fuels set out in Annex 5 of Regulation No 49.
On request of the retrofit system manufacturer, the type approval authority may allow the
use of market fuels or gaseous fuels produced with a composition representative for the
market fuels to be used.
11.1.1. Type Approval Test
The provisions of Paragraphs 4.1. and 4.2. of Regulation No. 49 regarding granting of a
universal fuel approval and granting of a fuel range restricted approval shall apply.
11.1.2. Application Range Extension
In case of a test for an application range extension in accordance with the provisions set out
in Paragraph 5.2.2. or 10.1.1., the vehicle shall be fuelled with diesel market fuel and a
gaseous market fuel in the range for which the engine retrofit system is approved. It is
recommended to use the gaseous fuel with the lowest Methane Number rating within this
fuel range.
The application range extension may be restricted to a smaller fuel range than the fuel
range of the initial application range, but in that case the fuel range of the actual applications
shall also be restricted.

12.3.6. The following information for each component:
(a)
(b)
(c)
Identification number;
Manufacturer's code;
Type approval, if it exists.
12.4. Engine
The installation manual shall contain at least the following information:
12.4.1. Engine Type and Displacement
12.4.2. Approval number
12.4.3. Engine code
12.5. Installation Instructions
The installation manual shall contain at least the following information:
12.5.1. Installation instructions of each component together with diagrams or photographs showing
clearly the layout of the individual components.
12.5.2. Diagram or photograph showing the exact position where the installer shall place the engine
retrofit system type approval plate (contained in the conversion kit).
12.5.3. Clear wiring diagram of the electrical system containing the mechanical components to
which the wires shall be connected.
12.5.4. Description of any modification of the engine system (hardware and/or software) required for
the installation of the engine retrofit system.
12.6. Interfaces
12.6.1. The instructions for completing the system shall include, at a minimum, the following
elements:
12.6.1.1. Approvals and markings of the components and devices that are used to complete the
engine retrofit system.
12.6.1.2. The technical specifications to be met by the components and devices that are used to
complete the engine retrofit system:
(a)
(b)
(c)
To correctly function,
To comply with the provisions of this Regulation,
To ensure the desired level of performance and reliability.
The technical specifications shall include the interface specifications (e.g. connection
characteristics, gas pressure, communication parameters, fuel gauge or level indicator,
etc.).

13.2.3. The manufacturer of the system shall include all the necessary information that is needed
for correct and safe operation of the dual-fuel retrofit system.
13.2.4. The user manual shall be considered as an integral part of the system and, therefore, must
be included with the delivery of the dual-fuel retrofit system hardware.
13.2.5. The user manual shall be written in the official language of the country to which the system
is delivered or at least in the English language.
13.2.6. The user manual shall reference the product types, versions and production years for which
it is applicable.
13.2.7. Information shall be given about relevant extreme ambient conditions.
13.3. Contents of the User Manual
13.3.1. Technical Specifications
The user manual shall contain at least the following information:
(a)
(b)
Operating characteristics;
Performance under normal operating conditions and in extreme ambient conditions.
13.3.2. Safety Instructions
The user manual shall give information for dangers to health and safety categorised in the
following way:
(a)
(b)
(c)
SUGGESTIONS for optimal use of the system;
ATTENTION for possible problems due to misuse;
WARNING for damage to persons or goods when procedures are not followed.
If and when safety symbols are used, they shall be in accordance with the international
system, SI and their purpose shall be clearly specified in the user manual.
13.3.2.1. The user manual shall indicate proper actions to be taken in case the vehicle is repainted
and put in a hot drying cabin, or for other activities such as welding, cutting, etc.
13.3.3. Dual-fuel Retrofit System Description
The purpose and function of all the components of the dual-fuel retrofit systems shall be
clearly described.
13.3.4. First Use of the Dual-fuel Retrofit System
The user manual shall contain any necessary information for the user about initial runningin.

Heavy Duty Dual-fuel Engine Retrofit Systems (HDDF-ERS) - Proposal.