Governor control may be effected by centrifugal (mechanical), hydraulic, pneumatic or combined (pneumatic-centrifugal) means. Speed governors may be classed as speed-limiting, constant-speed or all-speed. Speed-limiting and constant-speed governors are used on automobile engines and on auxiliary engines employed for starting tractor diesel engines. An automobile governor is in essence a maximum-speed governor. 2 c: k4 u& t! f2 T: g; D调速器控制可以通过离心(机械),液压,气动或合并(离心和气动组合式)的方式实现。调速器,可归纳为两极式,全程式或全速式。两极式和全程式调速器用于车用发动机和起动牵引柴油机的辅助发动机。汽车调速器在本质上是一个最大的调速。) {5 e+ w' P: X/ [# w$ E6 k