GB/T 44287-2024 Performance requirement and testing methods for electronic braking system (EBS) of commercial vehicle
1 Scope
This document specifies the general requirements, performance requirements, test conditions and testing methods for electronic braking system (EBS) of commercial vehicles.
This document is applicable to Class M2, Class M3, Class N2 and Class N3 vehicles equipped with EBSs in accordance with the requirements of GB/T 15089.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 5620 Road vehicles - Vocabulary and definition for braking of automotive vehicles and their trailers
GB 12676-2014 Technical requirements and testing methods for commercial vehicle and trailer braking systems
GB/T 13594-2003 Antilock braking performance and test procedure for motor vehicles and their trailers
GB/T 15089 Classification of power-driven vehicles and trailers
ISO 11992-2:2023 Road vehicles - Interchange of digital information on electrical connections between towing and towed vehicles - Part 2: Application layer for brakes and running gear
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 5620 and GB 12676-2014 and the following apply.
3.1
electronic braking system; EBS
pneumatic brake system that generates and transmits control signals in the form of electric signals and controls the generated braking force through outputting the electric signals
3.2
electronic control function
function of an electronic control unit (ECU) that sends an electronic control command to brake a vehicle after the ECU receives an electronic control signal output by a driver to operate an electronically controlled master valve through a brake pedal or an external braking request sent by other modules through a bus
Note 1: An electrically controlled brake master valve refers to a device that converts the position of a brake pedal into an electronic control signal and an air pressure control signal
Note 2: ECU refers to a component designed to process the information provided by the sensor(s) and to send control signals
3.3
deceleration control
function of determining the brake deceleration of a vehicle according to the position of brake pedal
3.4
brake assist; BA
function of EBS that can automatically provide greater braking efficiency than that corresponding to the pedal position or trigger the full cycle of an anti-lock braking system according to a driver's emergency braking needs
4 General requirements
4.1 A vehicle equipped with EBS shall have at least electronic control functions such as service braking, anti-lock braking, deceleration control and braking assist. In case of the failure of electronic control function, a service braking system shall have a backup brake control function, that is, to control air pressure and provide braking force to realize emergency braking.
4.2 Electronically controlled pneumatic braking system shall have self-check function.
4.3 The vehicle shall be equipped with an EBS fault signal device complying with the requirements of 4.4 and alarm the driver in case of any fault of the system affecting the generation or transmission of EBS control and response signals.
4.4 The EBS fault signal device shall meet the following requirements:
a) It shall be at a position in front of the driver, and easy for him or her to inspect the state of the fault signal device at the driving position.
b) It shall be indicated by the symbol for "EBS fault signal" as shown in Figure 1.
c) Yellow or red alarm signal shall be used according to the provisions of 4.2.1.28 a) in GB 12676-2014.
d) The fault signal device shall be bright and eye-catching after being lit so that the driver can clearly observe whether driving in the daytime or at night after adapting to the environmental road lighting conditions;
e) If a fault exists, the EBS fault signal device shall be lit up; as long as an ignition switch is in the "RUN" position, the EBS fault signal device shall remain constantly on until the fault is eliminated.
g) The EBS fault signal device shall be lit for functional inspection when the ignition switch is in the "ON" ("RUN") position or the ignition switch is between "ON" ("RUN") and "Start" (the manufacturer's specified inspection position); This requirement does not apply to a signal device located in common space. For some specific failures or faults that shall be provided with alarm signals but not found during static detection, once detected, these faults or failures shall be stored, and as long as the faults or failures still exist, the above alarm signals shall be continuously displayed when the ignition switch is in the "ON" ("RUN") position. Sensor anomalies, which cannot be detected under static conditions, shall be detected not later than when the vehicle speed exceed 10 km/h. However, to prevent erroneous fault indication when a sensor is not generating a vehicle speed output, due to non-rotation of a wheel, verification may be delayed but detected not later than when the vehicle speed exceeds 15 km/h.
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
5 Functional requirements
6 Test conditions
7 Test methods
商用車電控氣壓制動系統(EBS)性能要求及試驗方法
1 范圍
本文件規定了商用車電控氣壓制動系統的一般要求、性能要求、試驗條件和試驗方法。
本文件適用于裝備了電控氣壓制動系統符合GB/T15089規定的M2類、M3類、N2類、N3類車輛。
2 規范性引用文件
下列文件中的內容通過文中的規范性引用面構成本文件必不可少的條款。其中，注日期的引用文件，僅該日期對應的版本適用于本文件；不注日期的引用文件，其最新版本(包括所有的修改單)適用于本文件。
GB/T 5620 道路車輛 汽車和掛車制動名詞術語及其定義
GB 12676-2014 商用車輛和掛車制動系統技術要求及試驗方法
GB/T 13594-2003 機動車和掛車防抱制動性能和試驗方法
GB/T 15089 機動車輛及掛車分類
ISO 11992-2:2023 道路車輛引車和掛車之間電氣連接數字信息交換第2部分:制動和行駛系統應用層(Road vehicles-Interchange of digital information on electrical connections between towing and towed vehicles-art 2: Application layer for brakes and running gear)
3 術語和定義
GB/T 5620和GB 12676-2014界定的以及下列術語和定文適用于本文件
3.1
電控氣壓制動系統electronic braking system；EBS
以電信號的形式產生和傳輸控制信號，并通過輸出電信號控制產生制動力的氣壓制動系統
3.2
電子控制功能electronic control function
電子控制單元(ECU)接收駕駛人通過制動踏板操縱電控制動總閥輸出的電控信號或其他模塊通過總線發出的外部制動請求后，發送電控指令，對車輛進行制動的功能。
注1:電控制動總閥指的是將制動踏板位置轉化為電控信號和氣壓控制信號的裝置
注2:電子控制單元指的是用于處理傳感器提供的信息，并發出控制指令的部件。
3.3
減速度控制deceleration control
按制動踏板位置確定車輛的制動減速度的功能
3.4
制動輔助brake assist; BA
電控氣壓制動系統根據駕駛人的緊急制動需求，能自動提供比踏板位置對應的更大的制動效能或觸發防抱制動系統全循環的功能。
4 一般要求
4.1 安裝電控氣壓制動系統的車輛，應至少具有行車制動、防抱制動、減速度控制、制動輔助等電子控制功能。當電子控制功能失效時，行車制動系統應具有備份制動控制功能，通過氣壓控制并提供制動力以實現應急制動。
4.2 電控氣壓制動系統應具有自檢功能。
4.3 車輛應安裝符合4.4要求的EBS故障信號裝置，并在系統發生任何影響到EBS控制、響應信號產生或傳輸的故障時向駕駛人報警。
4.4 對ESB故障信號裝置的要求如下
a) 處于駕駛人前方視野范圍內，便于駕駛人在駕駛位置檢查故障信號裝置的狀態是否正常。
b) 應采用圖1所示的“EBS故障信號”標識符號進行指示。
c) 應按照GB 12676-2014中4.2.1.28 a)的規定使用黃色或紅色報警信號。
d) 故障信號裝置點亮后應足夠明亮、醒目，使駕駛人在適應環境道路照明條件后，無論白天或者夜晚都清晰觀察。
e) 如果有故障存在，EBS故障信號裝置就應點亮；并且，只要點火開關處于“ON”(“RUN”)位置。EBS故障信號裝置就應保持常亮，直至故障消除。
當點火開關置于“ON”(“RUN”)位置或者當點火開關處于“ON”(“RUN”)和“Start”之間(制造商指定的檢查位置)時，應點亮EBS故障信號裝置對其進行功能檢查。該要求不適用于在共用空間顯示的信號裝置。對某些應點亮上述報警信號在靜態檢測時沒發現的特定失效或故障，一旦檢測到應給予存儲，只要特定失效或故障仍然存在，當點火開關置于“ON”(“RUN”)位置時將一直顯示。對在靜態條件下不能檢測到的傳感器異常，應在車速大于10km/h之前完成檢測，但由于靜態條件下車輪不轉動，傳感器不產生車速信號，為防止發出錯誤的報警信號，可推遲檢測，但應在車速大于15km/h之前確認傳感器工作正常。
圖1 “EBS故障信號”標識符號
5 功能要求
6 試驗條件
7 試驗方法
