点火正时

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ignition timing
文章详细信息关键词：天然气发动机;点火正时;稀薄燃烧;排放 [gap=798]Keywords: CNG engine;ignition timing;lean-burn;emissions
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electronic spark timing
ESAC Electronic Spark Advance Control 点火提前控制 EST Electronic Spark Timing 点火正时 EVAP Evaporative Emission 蒸发排放污染 ..
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Indicated horsepower
... 点火系统Ignition timing 点火正时Indicated horsepower 惯性Injection valve ...
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EST
... ESAC 点火提前控制 EST 点火正时 EVAP 蒸发排放污染 ...

短语

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同时由于可调节点火正时，能使发动机的动力性和经济性达到最佳。
Meanwhile, because the ignition timing can be adjusted, the power performance and the economic performance of the engine can obtain the optimum.
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早期的控制系统主要是以气缸充气量、燃油质量和点火正时为控制参数。
Earlier engine control systems mainly based on mass air flow, fuel quality and Spark Timing.
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点火正时装置：触点必须能够在活塞处于气缸中相关位置时，按时关闭和开启。
Ignition timing devices. The contact points must be timed to close and open in proper relation to the piston positions in the cylinders.

点火正时
点火正时：在发动机的压缩冲程终了，活塞达到行程的顶点时，点火系统向火花塞提供高压火花以点燃气缸内的压缩混合气作功，这个时间就是点火正时。为使点火能量最大化，点火正时一般要提前一定的量，所以是在活塞即将到达上止点的那一刻点火，而不是正好达到上止点时才点火，这个提前量叫点火提前角。

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