进气门提前闭合时,影响燃烧的各种因素包括:a.气缸中气体温度与压力;b.有效压缩此;c.废气再循环;d.残余废气;e.其它因素。进气门提前闭合时气体运动减弱是引起燃烧时间延长的一个原因。通过电加热器加热进气空气可提高缸内气体温度和压力。另外,通过控制排气门的闭合时间来提高残余废气系数的方法,对提高气缸气体温度更为有效。 The various factors that affect combustion when the intake valve is closed in advance include: a. Gas temperature and pressure in the cylinder; b. Effective compression of this; c. Exhaust gas recirculation; d. Residual exhaust gas; e. Other factors. When the intake valve is closed in advance, the gas movement is weakened, which is one reason for the prolongation of combustion time. Heating the intake air via an electric heater increases the gas temperature and pressure in the cylinder. In addition, the method of increasing the residual exhaust gas coefficient by controlling the closing timing of the exhaust valve is more effective for raising the cylinder gas temperature.