GB/T 38796-2020 in English
VALIDPerformance requirements and test methods of automobile blow-out emergency safety device
- Issued on:2020-06-02
- Implemented on:2021-06-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$97.00
《GB/T 38796-2020汽车爆胎应急安全装置性能要求和试验方法》由TC114（全国汽车标准化技术委员会）归口，TC114SC19（全国汽车标准化技术委员会整车分会）执行，主管部门为工业和信息化部。
Introduction
Analysis of the core content of the standard
| Technical dimension | Mechanical device | Non-mechanical device |
|---|---|---|
| Installation method | Internal integration of the tire | Electronic system control |
| Environmental adaptability | Need to pass the -40℃~85℃ test | No clear temperature change requirements |
| Continuous distance | ≥1.0km (after a tire burst) | |
Key Performance Indicators
The standard clearly requires that after a tire burst: steering force increment ≤ 50N, the braking distance complies with the requirements of Table 1, and the device body has no structural failure. When the steering axis has a single-sided tire burst, the braking distance formula at 80km/h is: S≤0.15v+v2/103.5.
Innovation of the test method
1. Requirements for the tire blowout simulation device:
- Deflation time ≤ 0.75 seconds
- Crack size: ≥ 50mm when tire width ≤ 245mm, ≥ 80mm when > 245mm
2. For dual-axle vehicles, only the first axle tire blowout condition can be tested
Type expansion rules
Type expansion can be achieved through 6 consistency judgments, including: same device parameters, same rim specifications, no reduction in wheelbase/track and other core conditions.
Implementation recommendations
1. Give priority to mechanical devices that have passed the 480-hour salt spray test
2. ESC system vehicles must verify the speed limit condition
3. Regularly check the dynamic balance of the device (Standard 4.1.3)
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