GB/T 41590.4-2022 in English
VALIDRoad vehicles—Diagnostic communication over K-Line (DoK-Line)—Part 4: Requirements for emission-related systems
- Issued on:2022-07-11
- Implemented on:2023-02-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$97.00
| Standard No: | GB/T 41590.4-2022 |
| Document status: | VALID |
| Title in English: | Road vehicles—Diagnostic communication over K-Line (DoK-Line)—Part 4: Requirements for emission-related systems |
| Title in Chinese: | 道路车辆 基于K线的诊断通信 第4部分：排放相关系统要求 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2022-07-11 |
| Implemented on: | 2023-02-01 |
| ICS Classification: | 43.180-Diagnostic, maintenance and test equipment |
| Chinese Classification: | R17-Highway vehicle servicing installation |
| Professional Classification: | GB-National Standard |
| Related Keywords: | road vehicles diagnostic communication
physical layer compatibility requirements standard requirements diagnostic instrument diagnostic module |
| Related Topics: | uds diagnosis
Emissions-related diagnostics and non-emissions candlestick road vehicle standards Non-Emissions Related Diagnostics Emission relationship Emissions-related and non-emissions-related GB/T 41590.4 GB/T 41590.4-2022 Road GB |
《GB/T 41590.4-2022道路车辆 基于K线的诊断通信 第4部分：排放相关系统要求》由TC114（全国汽车标准化技术委员会）归口，TC114SC29（全国汽车标准化技术委员会电子与电磁兼容分会）执行，主管部门为工业和信息化部。
Introduction
Technical Core Analysis
K-line, as a bidirectional transmission channel, needs to meet the physical layer compatibility requirements of ISO 9141-2. The standard clearly points out the non-mandatory support
Architecture Comparison and Evolution
| Comparison Dimensions | ISO Standard | GB/T Standard |
|---|---|---|
| Physical Layer Voltage Support | Optional for 24V System | Recommended Only |
| Data Frame Length | Maximum 64 bytes | Limited to 7 bytes |
| Response code requirements | 10 optional | 6 mandatory constraints |
Diagnostic communication implementation details
Message structure specification
- Header length: 3 bytes fixed
- Destination address: uniformly use 33H function address
- Response format: physical addressing format bit A1A0=10
Typical application scenario
In a hybrid vehicle OBD test, it is necessary to passThe diagnostic instrument sends a 33H address message to obtain the equivalent air-fuel ratio data, and the response must be completed within the P3≤50ms time window
System adaptation suggestions
Development precautions
- Set the baud rate reference parameters strictly in accordance with the standard requirements (default 10400bps)
- Disable the access timing parameter service function in the ECU firmware
- The diagnostic module should implement dual initialization method compatibility
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