在农机行业数十年,发现一种现象,即无论是刚刚学会开车的新驾驶员,还是具有丰富驾车经验的老兵;也无论是农机手,还是城市里的汽车司机,他们有一个共同的习惯,这就是在冬季启动发动机时,启动前要摇转曲轴十几圈后再行启动;而在温暖季节,尤其是炎热的夏季,在启车前,几乎没有一个驾驶员要摇曲轴的,这种现象也一度影响笔者。 In the agricultural machinery industry for decades, a phenomenon was found that neither the new driver who just learned to drive a car nor the veteran who had rich experience in driving a car. They also had a common habit both in agricultural machinery and in the city as car drivers , Which is to start the engine in winter, crankshaft crankshaft dozen laps before starting to start again; and in the warm season, especially the hot summer before the start, almost no driver to crank axis, which Phenomenon also once affected the author.