BS ISO 13556-1999 道路车辆.排气系统泄漏位置的确定和设备规范

标准号：BS ISO 13556-1999
中文标准名称：道路车辆.排气系统泄漏位置的确定和设备规范
英文标准名称：Road vehicles - Localization of exhaust system leaks and equipment specifications
标准类型：T13
发布日期：1999/4/15 12:00:00
实施日期：1999/4/15 12:00:00
中国标准分类号：T13
国际标准分类号：43.060.20
适用范围：This International Standard specifies a method to verify the gas tightness of the exhaust system of road vehicles equipped with an international combustion engine. It is primarily intended to establish a method to detect and localize exhaust system leaks in order to improve the quality of exhaust gas measurements. It is also intended to complete the requirements of ISO 3929 and applicable regulations. The users of this International Standard are warned that: a) certain engines with high valve overlaps camshaft events, especially engines with eight or more cylinders, may not have all exhaust valves closed when the engine is stopped. This issue may cause the leak test to fail. This situation could be corrected by the disassembly of the exhaust valve actuation mechanism using the vehicle or engine manufacturer's recommended procedure; b) national regulations on the subject of pressurizing should be checked before testing; c) detected leakage can be quantified under certain test conditions. This International Standard also specifies the measurement apparatus and necessary devices. This method is particularly recommended for: a) automotive workshops, b) laboratories before any emission tests, c) testing and diagnostic stations. The measurement apparatus can be used at the end of line of automotive and exhaust parts manufacturers. note:1) ISO 3929:1995, Road vehicles— Measurement methods for exhaust gas emissions produced during inspection or maintenance.