Engine teaching model

The utility model provides an engine teaching model, which comprises a casing provided with a crankshaft mounting groove, a power device mounting groove and a plurality of piston assembly mounting grooves, a crankshaft, a plurality of piston assemblies, a plurality of valve assemblies, and a power device of which the output end is connected with the crankshaft through a crankshaft transmission belt, the valve assembly comprises a valve seat, a telescopic device and a valve rod. Through the cooperation of the above structures, a cam structure of a conventional opposed piston engine teaching model for realizing the intermittent motion of a valve is replaced by a miniature telescopic device to control the motion of a valve rod so as to control the opening and closing of the valve, thereby reducing the impact force of the whole valve assembly, and avoiding the overlarge noise in the teaching demonstration process. The teaching environment quality is improved, the telescopic rod of the telescopic device can achiev