Regulation No. 131-00

Name:Regulation No. 131-00
Description:Advanced Emergency Braking Systems.
Official Title:Uniform Provisions Concerning the Approval of: Motor Vehicles with Regard to the Advanced Emergency Braking Systems (AEBS).
Country:ECE - United Nations
Date of Issue:2013-08-07
Amendment Level:00 Series
Number of Pages:22
Vehicle Types:Bus, Component, Heavy Truck
Subject Categories:Prior Versions
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Keywords:

vehicle, approval, system, warning, regulation, paragraph, braking, type, aebs, control, means, emergency, annex, subject, driver, test, phase, target, collision, failure, manufacturer, signal, start, systems, speed, function, conditions, technical, requirements, provide, provided, vehicles, time, safety, documentation, advanced, electronic, provisions, signals, units, service, granted, regard, operation, production, part, functional, performance, number, design

Text Extract:

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E/ECE/324
) Rev.2/Add.130
E/ECE/TRANS/505 )
August 7, 2013
STATUS OF UNITED NATIONS REGULATION
ECE 131-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
MOTOR VEHICLES WITH REGARD TO THE ADVANCED
EMERGENCY BRAKING SYSTEMS (AEBS)
Incorporating:
00 series of amendments Date of Entry into Force: 09.07.13

REGULATION No. 131-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
MOTOR VEHICLES WITH REGARD TO THE ADVANCED
EMERGENCY BRAKING SYSTEMS (AEBS)
CONTENTS
REGULATION
Introduction (for information)
1. Scope and purpose
2. Scope
3. Application for approval
4. Approval
5. Specifications
6. Test procedure
7. Modification of vehicle type and extension of approval
8. Conformity of production
9. Penalties for non-conformity of production
10. Production definitively discontinued
11. Names and addresses of the Technical Services responsible for conducting approval tests and of
Type Approval Authorities
ANNEXES
Annex 1
Annex 2
Annex 3
Annex 4
Communication
Arrangements of approval marks
Warning and activation test requirements – Pass/fail values
Special requirements to be applied to the safety aspects of complex electronic vehicle
control systems.

1. SCOPE AND PURPOSE
This Regulation applies to the approval of vehicles of Category:
(a) N above 8t,
(b)
M and
(c) N .
Equipped with a pneumatic or air over hydraulic braking system with regard to an on-board
system to avoid or mitigate the severity of a rear-end in lane collision.
2. DEFINITIONS
2.1. "Advanced Emergency Braking System (AEBS)" means a system which can
automatically detect a potential forward collision and activate the vehicle braking system to
decelerate the vehicle with the purpose of avoiding or mitigating a collision.
2.2. "Vehicle Type with Regard to its Advanced Emergency Braking System" means a
category of vehicles which do not differ in such essential respects as:
(a)
(b)
(c)
The manufacturer's trade name or mark;
Vehicle features which significantly influence the performances of the Advanced
Emergency Braking System;
The type and design of the Advanced Emergency Braking System.
2.3. "Subject Vehicle" means the vehicle being tested.
2.4. "Target" means a high volume series production passenger car of Category M AA saloon
or in the case of a soft target an object representative of such a vehicle in terms of its
detection characteristics applicable to the sensor system of the AEBS under test.
2.5. "Moving Target" means a target travelling at a constant speed in the same direction and in
the centre of the same lane of travel as the subject vehicle.
2.6. "Stationary Target" means a target at standstill facing the same direction and positioned on
the centre of the same test lane of travel as the subject vehicle.
2.7. "Soft Target" means a target that will suffer minimum damage and cause minimum damage
to the subject vehicle in the event of a collision.
2.8. "Collision Warning Phase" means the phase directly preceding the emergency braking
phase, during which the AEBS warns the driver of a potential forward collision.
2.9. "Emergency Braking Phase" means the phase starting when the AEBS emits a braking
demand for at least 4m/s² deceleration to the service braking system of the vehicle.
2.10. "Common Space" means an area on which two or more information functions (e.g. symbol)
may be displayed, but not simultaneously.

4.5. If the vehicle conforms to a vehicle type approved under one or more other Regulations,
annexed to the Agreement, in the country which has granted approval under this
Regulation, the symbol prescribed in Paragraph 4.4.1. above need not be repeated; in such
a case, the Regulation and approval numbers and the additional symbols shall be placed in
vertical columns to the right of the symbol prescribed in Paragraph 4.4.1. above.
4.6. The approval mark shall be clearly legible and be indelible.
4.7. The approval mark shall be placed close to or on the vehicle data plate.
5. SPECIFICATIONS
5.1. General
5.1.1. Any vehicle fitted with an AEBS complying with the definition of Paragraph 2.1. above shall
meet the performance requirements contained in Paragraphs 5.1. to 5.6.2. of this
Regulation and shall be equipped with an anti-lock braking function in accordance with the
performance requirements of Annex 13 to Regulation No. 13.
5.1.2. The effectiveness of the AEBS shall not be adversely affected by magnetic or electrical
fields. This shall be demonstrated by compliance with Regulation No. 10, 03 Series of
amendments to the Regulation.
5.1.3. Conformity with the safety aspects of complex electronic control systems shall be shown by
meeting the requirements of Annex 4.
5.2. Performance Requirements
5.2.1. The system shall provide the driver with appropriate warning(s) as below:
5.2.1.1. A collision warning when the AEBS has detected the possibility of a collision with a
preceding vehicle of Category M, N or O in the same lane which is travelling at a slower
speed, has slowed to a halt or is stationary having not being identified as moving. The
warning shall be as specified in Paragraph 5.5.1. above.
5.2.1.2. A failure warning when there is a failure in the AEBS that prevents the requirements of this
Regulation of being met. The warning shall be as specified in Paragraph 5.5.4. below.
5.2.1.2.1. There shall not be an appreciable time interval between each AEBS self-check, and
subsequently there shall not be an appreciable delay in illuminating the warning signal, in
the case of an electrically detectable failure.
5.2.1.3. A deactivation warning, if the vehicle is equipped with a means to manually deactivate the
AEBS, shall be given when the system is deactivated. This shall be as specified in
Paragraph 5.4.2. below.
5.2.2. Subsequent to the warning(s) of Paragraph 5.2.1.1. above, and subject to the provisions of
Paragraphs 5.3.1. to 5.3.3. below, there shall be an emergency braking phase having the
purpose of significantly decreasing the speed of the subject vehicle. This shall be tested in
accordance with Paragraphs 6.4. and 6.5. of this Regulation.
5.2.3. The system shall be active at least within the vehicle speed range of 15km/h up to the
maximum design speed of the vehicle, and at all vehicle load conditions, unless manually
deactivated as per Paragraph 5.4. below.

5.5.6. The optical warning signals shall be visible even by daylight; the satisfactory condition of the
signals must be easily verifiable by the driver from the driver's seat.
5.5.7. When the driver is provided with an optical warning signal to indicate that the AEBS is
temporarily not available, for example due to inclement weather conditions, the signal shall
be constant and yellow in colour. The failure warning signal specified in Paragraph 5.5.4.
above may be used for this purpose.
5.6. Provisions for the Periodic Technical Inspection
5.6.1. At a periodic technical inspection it shall be possible to confirm the correct operational
status of the AEBS by a visible observation of the failure warning signal status, following a
"power-ON" and any bulb check. In the case of the failure warning signal being in a
common space, the common space must be observed to be functional prior to the failure
warning signal status check.
5.6.2. At the time of type approval, the means to protect against simple unauthorised modification
of the operation of the failure warning signal chosen by the manufacturer shall be
confidentially outlined. Alternatively, this protection requirement is fulfilled when a
secondary means of checking the correct operational status of the AEBS is available.
6. TEST PROCEDURE
6.1. Test Conditions
6.1.1. The test shall be performed on a flat, dry concrete or asphalt surface affording good
adhesion.
6.1.2. The ambient temperature shall be between 0°C and 45°C.
6.1.3. The horizontal visibility range shall allow the target to be observed throughout the test.
6.1.4 The tests shall be performed when there is no wind liable to affect the results.
6.2. Vehicle Conditions
6.2.1. Test Weight
The vehicle shall be tested in a condition of load to be agreed between the manufacturer
and the Technical Service. No alteration shall be made once the test procedure has begun.
6.3. Test Targets
6.3.1. The target used for the tests shall be a regular high volume series production passenger car
of Category M AA saloon, or alternatively a "soft target" representative of such a vehicle in
terms of its identification characteristics applicable to the sensor system of the AEBS under
test.
6.3.2. Details that enable the target(s) to be specifically identified and reproduced shall be
recorded in the vehicle type approval documentation.

6.5.2. The timing for the collision warning modes referred to in Paragraph 5.5.1. above shall
comply with the following:
6.5.2.1. At least one haptic or acoustic warning mode shall be provided no later than the value
specified in Table I, column E of Annex 3, before the start of the emergency braking phase.
6.5.2.2. At least two warning modes shall be provided no later than the value specified in Table I,
column F of Annex 3, before the start of the emergency braking phase.
6.5.2.3. Any speed reduction during the warning phase shall not exceed either 15km/h or 30% of the
total subject vehicle speed reduction, whichever is higher.
6.5.3. The emergency braking phase shall result in the subject vehicle not impacting the moving
target.
6.5.4. The emergency braking phase shall not start before a TTC equal to or less than 3.0s.
Compliance shall be verified by either actual measurement during the test or using
documentation provided by the vehicle manufacturer, as agreed between the Technical
Service and the vehicle manufacturer.
6.6. Failure Detection Test
6.6.1. Simulate an electrical failure, for example by disconnecting the power source to any AEBS
component or disconnecting any electrical connection between AEBS components. When
simulating an AEBS failure, neither the electrical connections for the driver warning signal of
Paragraph 5.5.4. above nor the optional manual AEBS deactivation control of
Paragraph 5.4. shall be disconnected.
6.6.2. The failure warning signal mentioned in Paragraph 5.5.4. above shall be activated and
remain activated not later than 10s after the vehicle has been driven at a speed greater than
15km/h and be reactivated immediately after a subsequent ignition "off" ignition "on" cycle
with the vehicle stationary as long as the simulated failure exists.
6.7. Deactivation Test
6.7.1. For vehicles equipped with means to deactivate the AEBS, turn the ignition (start) switch to
the "on" (run) position and deactivate the AEBS. The warning signal mentioned in
Paragraph 5.4.2. above shall be activated. Turn the ignition (start) switch to the "off"
position. Again, turn the ignition (start) switch to the "on" (run) position and verify that the
previously activated warning signal is not reactivated, thereby indicating that the AEBS has
been reinstated as specified in Paragraph 5.4.1. above. If the ignition system is activated by
means of a "key", the above requirement shall be fulfilled without removing the key.

8.3. The Type Approval Authority which has granted approval may at any time verify the
conformity of control methods applicable to each production unit. The normal frequency of
such inspections shall be once every two years.
9. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
9.1. The approval granted in respect of a vehicle type pursuant to this Regulation may be
withdrawn if the requirements laid down in Paragraph 8. above are not complied with.
9.2. If a Contracting Party withdraws an approval it had previously granted, it shall forthwith so
notify the other Contracting Parties applying this Regulation by sending them a
communication form conforming to the model in Annex 1 to this Regulation.
10. PRODUCTION DEFINITIVELY DISCONTINUED
If the holder of the approval completely ceases to manufacture a type of vehicle approved in
accordance with this Regulation, he shall so inform the Type Approval Authority which
granted the approval, which in turn shall forthwith inform the other Contracting Parties to the
Agreement applying this Regulation by means of a communication form conforming to the
model in Annex 1 to this Regulation.
11. NAMES AND ADDRESSES OF THE TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS AND OF TYPE APPROVAL AUTHORITIES
The Contracting Parties to the Agreement applying this Regulation shall communicate to the
United Nations Secretariat the names and addresses of the Technical Services responsible
for conducting approval tests and of the Type Approval Authorities which granted approval
and to which forms certifying approval or extension or refusal or withdrawal of approval are
to be sent.

14. Signature: ............................................................................................................................................
15. Annexed to this communication are the following documents, bearing the approval number
indicated above:
List of the positive actions enabling the driver to interrupt the braking phase ....................................
Description of the AEBS warning strategy ..........................................................................................
Details which enable the targets to be specifically identified ..............................................................
16. Any remarks: .......................................................................................................................................

ANNEX 3
WARNING AND ACTIVATION TEST REQUIREMENTS – PASS/FAIL VALUES
A
B
C
D
E
F
G
H
Stationary target
Moving target
Timing of warning modes
Speed
Timing of warning modes
Speed
Target speed
At least 1 At least 2 reduction At least 1 haptic At least 2 reduction (ref. Paragraph
haptic or (ref. Paragraph (ref. or acoustic (ref. Paragraph (ref. Paragraph 6.5.1.)
acoustic 6.4.2.2.) Paragraph (ref. Paragraph 6.5.2.2.) 6.5.3.)
(ref. Paragraph
6.4.4.) 6.5.2.1.)
6.4.2.1.)
M ,
N >8t
and N
Not later than
1.4s before the
start of
emergency
braking phase
Not later than Not less
0.8s before the than 10km/h
start of
emergency
braking phase
Not later than
1.4s before the
start of
emergency
braking phase
Not later than
0.8s before the
start of
emergency
braking phase
No impact 32 ± 2km/h 1

2.5. "Units" are the smallest divisions of system components which will be considered in this
annex, since these combinations of components will be treated as single entities for
purposes of identification, analysis or replacement.
2.6. "Transmission Links" are the means used for inter-connecting distributed units for the
purpose of conveying signals, operating data or an energy supply. This equipment is
generally electrical but may, in some part, be mechanical, pneumatic, hydraulic or optical.
2.7. "Range of Control" refers to an output variable and defines the range over which the
system is likely to exercise control.
2.8. "Boundary of Functional Operation" defines the boundaries of the external physical limits
within which the system is able to maintain control.
3. DOCUMENTATION
3.1. Requirements
The manufacturer shall provide a documentation package which gives access to the basic
design of "The System" and the means by which it is linked to other vehicle systems or by
which it directly controls output variables.
The function(s) of "The System" and the safety concept, as laid down by the manufacturer,
shall be explained.
Documentation shall be brief, yet provide evidence that the design and development has
had the benefit of expertise from all the system fields which are involved.
For periodic technical inspections, the documentation shall describe how the current
operational status of "The System" can be checked.
3.1.1. Documentation Shall Be Made Available In 2 Parts:
(a)
(b)
The formal documentation package for the approval, containing the material listed in
Paragraph 3. of this annex (with the exception of that of Paragraph 3.4.4. below)
which shall be supplied to the Technical Service at the time of submission of the type
approval application. This will be taken as the basic reference for the verification
process set out in Paragraph 4. of this annex.
Additional material and analysis data of Paragraph 3.4.4. below, which shall be
retained by the manufacturer, but made open for inspection at the time of type
approval.
3.2. Description of the Functions of "The System"
A description shall be provided which gives a simple explanation of all the control functions
of "The System" and the methods employed to achieve the objectives, including a statement
of the mechanism(s) by which control is exercised.
3.2.1. A list of all input and sensed variables shall be provided and the working range of these
defined.
3.2.2. A list of all output variables which are controlled by "The System" shall be provided and an
indication given, in each case, of whether the control is direct or via another vehicle system.

3.4. Safety Concept of the Manufacturer
3.4.1. The manufacturer shall provide a statement which affirms that the strategy chosen to
achieve "The System" objectives will not, under non-fault conditions, prejudice the safe
operation of systems which are subject to the prescriptions of this Regulation.
3.4.2. In respect of software employed in "The System", the outline architecture shall be explained
and the design methods and tools used shall be identified. The manufacturer shall be
prepared, if required, to show some evidence of the means by which they determined the
realisation of the system logic, during the design and development process.
3.4.3. The manufacturer shall provide the technical authorities with an explanation of the design
provisions built into "The System" so as to generate safe operation under fault conditions.
Possible design provisions for failure in "The System" are for example:
(a)
(b)
(c)
Fall-back to operation using a partial system.
Change-over to a separate back-up system.
Removal of the high level function.
In case of a failure, the driver shall be warned for example by warning signal or message
display. When the system is not deactivated by the driver, e.g. by turning the Ignition (run)
switch to "off", or by switching off that particular function if a special switch is provided for
that purpose, the warning shall be present as long as the fault condition persists.
3.4.3.1. If the chosen provision selects a partial performance mode of operation under certain fault
conditions, then these conditions shall be stated and the resulting limits of effectiveness
defined.
3.4.3.2. If the chosen provision selects a second (back-up) means to realise the vehicle control
system objective, the principles of the change-over mechanism, the logic and level of
redundancy and any built in back-up checking features shall be explained and the resulting
limits of back-up effectiveness defined.
3.4.3.3. If the chosen provision selects the removal of the higher level function, all the corresponding
output control signals associated with this function shall be inhibited, and in such a manner
as to limit the transition disturbance.
3.4.4. The documentation shall be supported, by an analysis which shows, in overall terms, how
the system will behave on the occurrence of any one of those specified faults which will
have a bearing on vehicle control performance or safety.
This may be based on a Failure Mode and Effect Analysis (FMEA), a Fault Tree Analysis
(FTA) or any similar process appropriate to system safety considerations.
The chosen analytical approach(es) shall be established and maintained by the
manufacturer and shall be made open for inspection by the technical service at the time of
the type approval.
3.4.4.1. This documentation shall itemise the parameters being monitored and shall set out, for each
fault condition of the type defined in Paragraph 3.4.4. above, the warning signal to be given
to the driver and/or to service/technical inspection personnel.

Advanced Emergency Braking Systems.