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冬季,农机经常会陷入清晨难以启动的窘境,其实,只要做好农机的换季保养工作,再加上正确的驾驶操作,农机在冬季的故障和安全事故是可以避免的。1低温对车辆安全运行的不利影响(1)发动机启动困难1发动机曲轴的转动阻力明显增大:随着环境温度的降低,油底壳内润滑油的黏度增大,曲轴的转动阻力增加,使发动机的启动转速降低,汽油机进气道内真空度小,汽油雾化差,着火困难;柴油机气缸内压缩压力和温度不足,柴油难以着火。
In winter, agricultural machinery often falls into the awkward situation of hard-to-start in the early morning. In fact, failure of agricultural machinery in winter and safety accidents can be avoided as long as the seasonal maintenance of agricultural machinery is done and the proper driving operation is performed. 1 Low temperature adverse effect on the safe operation of the vehicle (1) engine start difficult 1 engine crankshaft rotation resistance increased significantly: as the ambient temperature decreases, the viscosity of the lubricating oil in the oil pan increases, the crankshaft rotation resistance increases, so that Engine start-up speed is reduced, the degree of vacuum in the intake of the gasoline engine is small, the gasoline atomization is poor and the ignition is difficult; the compression pressure and temperature of the diesel engine cylinder are insufficient, and the diesel oil is hard to catch fire.