单选题喷油泵出油阀密封锥面泄漏,造成的不良影响是()。A喷油定时延迟,喷油量不变B喷油压力下降,喷油定时不变C喷油压力下降,喷油量下降,喷油定时不变D喷油量下降,喷油定时延后
单选题
喷油泵出油阀密封锥面泄漏,造成的不良影响是()。
A
喷油定时延迟,喷油量不变
B
喷油压力下降,喷油定时不变
C
喷油压力下降,喷油量下降,喷油定时不变
D
喷油量下降,喷油定时延后
参考解析
解析:
当喷油泵出油阀关闭后,因密封锥面泄漏,会使高压油管内的燃油压力在柱塞下行吸油行程中漏回油泵套筒内,这样下一次供油时必须补充漏回油泵套筒内的油量后,才能使油压上升开始供油,因此出油阀密封锥面泄漏会使喷油定时延迟,喷油压力下降,喷油量下降。
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