Study of the Automatic Speed Control System of a Diesel Engine

Abstract

To increase fuel efficiency and reduce emissions of toxic components from exhaust gases of diesel engines, it is necessary to ensure accurate maintenance of the crankshaft speed. This function is assigned to the automatic engine speed control system. Currently, speed regulators operating on the Polzunov-Watt principle have become predominant in the engine industry. However, these regulators do not always provide the required indicators of static accuracy of speed control and dynamic parameters of the control process. The article examines the possibility of improving these indicators by using sequentially connected corrective links in the speed controller of a ZMZ 514 diesel engine (4 ChN 8,7/9,4). A corrective inertial-forcing link is considered as such a link. Using the SimInTech software package, calculations of transient processes of loading on an engine equipped with a standard speed controller and a regulator with a sequentially activated correction link were carried out. The optimization of the structure and parameters of the considered speed controller has been carried out.