Automobile engine wheel train drive system

Abstract

The invention discloses an automobile engine wheel train drive system which comprises a crankshaft, a timing wheel train drive belt wheel, an auxiliary device wheel train drive belt wheel and a dual-mass flywheel, wherein the crankshaft is provided with a main journal, a crank throw and a balance weight; the timing wheel train drive belt wheel is mounted on a timing wheel train drive belt wheel mounting journal at the front end of the crankshaft; the timing wheel train drive belt wheel mounting journal is an eccentric mounting structure relative to the main journal; the auxiliary device wheel train drive belt wheel is mounted at the front end of the timing wheel train drive belt wheel; and the dual-mass flywheel is mounted at the rear end of the crankshaft. The system disclosed by the invention reduces the shock excitation amplitude of an engine wheel train, reduces the oscillating quantity of the belt and the dynamic tension of the belt, prolongs the service life of the parts of the engine wheel train, reduces the operation noise of the wheel train and the frictional loss and power loss, and improves the comprehensive performance of the engine.

Description

technical field [0001] The invention relates to an engine wheel train driving system, in particular to an automobile engine wheel train driving system capable of weakening the excitation generated by a valve mechanism and an engine auxiliary device and ensuring smooth operation of the engine, and belongs to the technical field of combustion engines. Background technique [0002] The automobile engine gear train generally includes a timing gear train, an auxiliary gear train and a flywheel, wherein the timing gear train and the auxiliary gear train are arranged at the front end of the engine, and the flywheel is installed at the power output end of the engine crankshaft. When the engine is started, the flywheel is driven by the starter to rotate, and then the crankshaft, piston, and valve mechanism are driven by the flywheel, and the torque is transmitted to the engine auxiliary device. When the engine is in normal working condition, the crankshaft drives the timing gear trai...

AI Technical Summary

Problems solved by technology

It can be seen that the crankshaft is the main driving part of the automobile engine wheel train. Because the engine crankshaft is subject to the combined action of periodically changing forces and moments (including torque and bending moment), coupled with the elasticity of the crankshaft itself and the crankshaft, balance weight, piston, etc. Due to the inertia of the mass of moving parts such as connecting rods, the crankshaft will experience free torsional vibration and forced torsional vibration relative to the flywheel; It is assembled concentrically. When the engine is working normally, the exciting vibration generated by the working characteristics of the valve train, high-pressure oil pump and generator and other auxiliary devices will have a serious impact on the engine crankshaft and gear train (such as noise, vibration, friction loss, power loss, etc.) loss, fuel consumption, life, etc.), leading to a decline in the overall performance of the engine

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