气门弹簧多为等螺距螺旋弹簧,一般在一个气门上安装一个弹簧。在有的汽车发动机上,为了防止弹簧发生共振,采用变螺距弹簧(如五十铃CVR重型货车发动机气门弹簧);在多数高速发动机上则采用双气门弹簧。变螺距气门弹簧和双气门弹簧安装的方法要正确,否则它们不能起到应有的作用。 1 变螺距弹簧气门弹簧在发动机工作过程中,容易发生 Valve springs are mostly equal-pitch helical springs, usually with a spring on a valve. In some automobile engines, variable pitch springs (such as Isuzu CVR heavy duty truck engine valve springs) are used to prevent the spring from resonating and double valve springs are used on most high speed engines. Variable pitch valve spring and double valve spring installation method is correct, or they can not play its due role. 1 variable pitch spring valve spring in the engine during work, prone to