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调整气门间隙是否正确得当,会直接影响到发动机的动力性和经济性,在压缩上止点调整气门间隙是正确的,但对于工作时间长的发动机是欠科学的。因配气系诸件都已有磨损,不再是设计时的配气相位角,这时进气门在排气上止点前17度曲轴转角时,摇臂头压不到气门杆端头,在下止点后43度曲轴转角时,气门已经早关闭;排气门在排气上止点后17度曲轴转角时已提前关闭,在下止点前43度曲轴转角时尚未开启,为此在调整气门间隙时应注意以下事项:
Adjusting the valve clearance is properly and properly, will have a direct impact on the engine’s power and economy, compression on the dead center to adjust the valve clearance is correct, but for a long working hours of the engine is less scientific. As the gas system has worn all the pieces, is no longer the design of the gas phase angle, when the intake valve before the top dead center in the exhaust crank angle of 17, the rocker head pressure less than the stem end , 43 degrees below the bottom dead center crank angle, the valve has already been closed early; exhaust valve 17 degrees in the exhaust after the top dead center crankshaft angle has been closed in advance, before the bottom dead center 43 degrees crank angle has not yet opened, so in Adjust the valve clearance should note the following: