【单选题】【消耗次数:1】
在多点电控汽油喷射系统中,喷油器的喷油量主要取决于喷油器的
针阀升程
喷孔大小
内外压力差
针阀开启时的持续时间
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相关题目
【单选题】 在多点电控汽油喷射系统中,喷油器的喷油量主要取决于喷油器的
①  针阀升程
②  喷孔大小
③  内外压力差
④  针阀开启的持续时间
【单选题】 在电子控制汽油喷射系统中,电磁喷油器球阀或针阀的升程约为:
①  0.1-0.2mm
②  1-2mm
③  2-12mm
【单选题】 电磁喷油器的喷油量取决于电磁阀打开的时间,也就是取决于ECU提供的()。
①  喷油脉宽
②  转速
③  空燃比
④  点火时刻
【判断题】 所谓柱塞偶件是指喷油器中的针阀与针阀体
①  正确
②  错误
【判断题】 孔式喷油器的喷孔直径一般比轴针式喷油器的喷孔大
①  正确
②  错误
【判断题】 在相同的喷射条件下,喷油器的动态喷油量大于静态喷油量。( )
①  正确
②  错误
【单选题】 在时间控制式柴油喷射系统中,电磁溢流阀控制喷油量的方法是控制:
①  喷油开始时间
②  喷油结束时间
③  喷油持续时间
【判断题】 喷油量控制是电控燃油喷射系统最主要的控制功能
①  正确
②  错误
【单选题】 当结构确定后,电磁喷油器的喷油量主要决定于( )
①  喷油脉宽
②  点火提前角
③  工作温度
【单选题】 当结构确定后,电磁喷油器的喷油量主要决定于
①  喷油脉宽
②  点火提前角
③  工作温度
④  电压高低
随机题目
【单选题】 4.What if I drink this?
①  happens
②  is happening
③  will happen
④  is happened
【单选题】 10.Now Mike isn’t here. He _________ Mr. Green’s. Perhaps he _______ back in a few minutes.
①  went to; is coming
②  has gone to; will come
③  has been to ; will be
④  is going to; has come
【单选题】 6.Look out! That tree _______ fall down.
①  is going to
②  will be
③  shall
④  would
【单选题】 8.They can’t leave until they ______ their work.
①  did
②  are doing
③  have done
④  has done
【单选题】 1.When I saw Mary, she on the piano.
①  is playing
②  plays
③  was playing
④  played
【单选题】 7. My uncle __________ to see me. He’ll be there soon.
①  comes
②  is coming
③  had come
④  came
【单选题】 14.They ______ lunch at home every day.
①  have not
②  didnt have
③  dont have
④  have not any
【单选题】 6.Sam was ill yesterday, so he _____ his home work.
①  didn’t
②  not did
③  didn’t do
④  didn’t did
【单选题】 11. _____ of us likes the film.
①  Both
②  All
③  Neither
④  Some
【单选题】 15.- _____ is your English teacher like? - He is tall and thin.
①  How
②  What
③  Which
④  /