预热器是一种热量发生器,可以将发出的热量送入柴油机的循环系统中。预热器在内燃机车上的用途是:动力装置起动前的预热,柴油机停机时的动力装置加热以及动力装置起动后加快柴油机的加热。柴油机加热装置的种类很多,有的是利用热水、空气、机油或水蒸汽的热量以及其他事先被加热了的载热介质的热量进行加热,也有 The preheater is a heat generator that sends the emitted heat into the circulation system of the diesel engine. The purpose of the preheater on the diesel locomotive is to preheat the power plant before starting, to heat the power plant when the diesel engine stops, and to accelerate the heating of the diesel engine after the power plant is started. There are many types of diesel engine heating devices, some of which use the heat of hot water, air, oil or water vapor, and other heats of a heating medium that has been heated in advance.