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一辆北京BJ130型载货车行驶中熄灭之后就难以启动,开始怀疑是供油系因温度升高产生热气阻所致,经检视供油情况、电路均无故障。对化油器各个零件进行认真检查,发现浮子室上面的放气阀与加速泵拉杆连接座孔磨损过甚,致使放气阀不能打开。经过放气阀和座孔修复调整后,故障即排除。为了防止高温度时浮子室内的汽油蒸发产生蒸汽压力,汽油未经与空气混合直接进入进气管,影响发动机热启动和热怠速稳定性,因此,BJ492QA型发动机的BJH201A型化油器在浮子室上面设置了放气阀,当汽
When a Beijing BJ130 truck goes out, it will be hard to start. It is suspected that the fuel supply system is caused by the thermal resistance due to the temperature increase. After checking the oil supply, the circuit is faultless. Careful inspection of the various parts of the carburetor and found that the float valve above the exhaust valve and accelerator rod connecting seat hole wear too much, resulting in the release valve can not be opened. After deflation valve and seat hole repair adjustment, the fault is ruled out. In order to prevent vaporization of the gasoline in the float chamber at high temperature, steam pressure is generated, and the gasoline directly enters the intake pipe without being mixed with the air to affect the hot start and the thermal idle stability of the engine. Therefore, the BJH201A carburetor of the BJ492QA engine is above the float chamber Set the vent valve, when the steam