Earlier engine control systems mainly based on mass air flow, fuel quality and Spark Timing.
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。
Effects of fuel injection timing on combustion and emission characteristics of a single-cylinder diesel engine fuelled with diesel and diesel-propane blends were studied.
在一台单缸直喷式柴油机上开展了不同喷油提前角下燃用柴油和柴油-丙烷混合燃料时的燃烧和排放特性研究。
The principle, structure and parameters of the solenoid valve used to control the fuel injection timing of VE pump are described. The control method and circuit are studied.
详细介绍了新研制的电控式VE分配泵供油正时控制电磁阀工作原理、结构形式、参数计算、控制方式以及对应的驱动电路。
Compared with stoichiometric mixture operation, fuel economy and emissions are remarkably influenced by injection timing when lean mixture is applied.
在发动机燃用稀薄混合气时，喷油定时对排放和经济性的影响较为明显。
The results show that the multi-time ignition can improve ignition reliability, especially when ignition timing is too advance or too late, or air fuel ratio is far from the best ratio of ignition.
试验结果表明：多次点火有助于提高点火可靠性，特别在点火提前角过大或过小、空燃比偏离最佳点火比例时。
That the optimum fuel injection timing corresponding to one operating mode of engine is determined by adjusting the solenoid valve can improve economy and power, and lower the emissions of engine.
这样通过调节电磁阀就可以实现发动机在不同工况下有最佳的供油提前角与之匹配，从而达到改善发动机经济性和动力性并降低废气排放之目的。
The dynamometer test results showed that the injection timing had a large effect on the fuel consumption and it must be accurately and precisely controlled, when the engine was working at low load.
试验表明：喷油时刻对于降低燃油消耗率影响很大，小负荷时必须对喷油时刻进行精确控制；
Poor fuel quality. Incomplete combustion and lack of sealing between piston and cylinder wall or badly losing valves. Possibly incorrect engine timing / set up.
燃油品质差，不完全燃烧和活塞与气缸壁之间的密封性差。 。
The experiment results show that the injection pulse width and timing of both injectors have obvious effect on fuel consumption and emission.
试验结果表明，两个喷油器的喷油量和喷油定时对油耗和排放都有明显的影响。
Fuel and timing curves are extensively modified for peak performance and drivability.
燃料和时间曲线广泛修改为最佳性能和驾驶性能。
Fuel and timing curves are modified for optimal performance and mileage using less expensive, lower octane fuels.
燃料和时间曲线修改为最佳性能和较低行驶里程，使用成本较低，可以使用低辛烷值的燃料。
Fuel and timing curves are modified for optimal performance and mileage using less expensive, lower octane fuels.
燃料和时间曲线修改为最佳性能和较低行驶里程，使用成本较低，可以使用低辛烷值的燃料。
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