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我部一辆东风牌汽车,据司机反映说,发动机在怠速时很容易熄火。在公路上行驶时,总感觉点火时间过晚,若将点火提前角增大时,汽车重载爬坡又出现强烈爆震声。经过维修人员认真分析后,发现问题出在真空点火提前装置上,检查结果是膜片破裂。 我们知道正常工作时,真空点火提前装置,能使发动机的点火提前角随着负荷的变化而变化。当发动机负荷较小时,化油器的节气门开度也小,其下部真空度较大,膜片在大气压的作用下,克服弹簧的阻力向右移动,这时膜片拉杆使分电器上的活动底板相对于
I Dongfang a car brand, according to the driver said that the engine is easy to turn off at idle. When driving on the road, always feel the ignition time is too late, if the ignition advance angle increases, the car overloaded ramp again strong knock sound. After careful analysis of maintenance personnel, the problem was found in the vacuum ignition ahead of the device, the test results are broken diaphragm. We know that during normal operation, the vacuum ignition advance device, can make the engine ignition advance angle with the load changes. When the engine load is small, carburetor throttle opening is small, the lower part of the vacuum, the diaphragm under the action of atmospheric pressure to overcome the spring resistance to the right to move, then the diaphragm rod to the distributor Activity relative to the floor