System for optimizing commercial vehicle engine vibration performance

Abstract

The invention provides a system for optimizing the commercial vehicle engine vibration performance. The system comprises suspension cushions, vibration sensors, cylinder pressure sensors, an alerter, a combination instrument, a single chip microcomputer, an adjusting switch, a vacuum pump and a driving motor; the suspension cushions are thickness-changeable suspension cushions and are installed at the joint of an engine and a frame; the vibration sensors are installed on the four suspension cushions in front and at back of the engine and flywheels, the cylinder pressure sensors are installed on all cylinders of the engine, and each thickness-changeable suspension cushion is composed of an upper connecting support, a middle adjusting part and a lower connecting support, wherein the middle adjusting part is composed of a metal flange, a damping spring, an air bag and a vacuum valve; the single chip microcomputer is arranged in a vehicle body, the alerter, the combination instrument and the adjusting switch are installed in a cab, and the single chip microcomputer can communicate with the engine ECU. Accordingly, vibration transmission generated by the engine can be monitored in real time, and when vibration exceeds a set value, vibration of the engine is reduced.

Description

technical field [0001] The invention belongs to the technical field of connection between a commercial vehicle engine and a vehicle frame, in particular to a system for optimizing the vibration characteristics of a commercial vehicle engine. Background technique [0002] The car is always in a state of vibration when driving. Due to uneven road surface, changes in vehicle speed and direction of movement, engine work excitation and unbalanced mass of wheels and transmission system, strong vibrations of the whole vehicle and local parts are generated. These vibrations seriously affect the ride comfort of the car. performance such as handling stability. [0003] There are many factors that affect the vibration of commercial vehicles. For example, the combustion of the engine itself is not good under certain working conditions, and the fuel injection of each cylinder is uneven; Vibration, etc. When the vehicle vibrates seriously, the driver feels that the steering wheel is diff...

AI Technical Summary

Problems solved by technology

[0005] 1) At present, the phenomenon of commercial vehicle engine vibration can only be judged through in-situ testing, and there is no timely monitoring system for engine vibration problems in any driving state of the vehicle;

[0006] 2) At present, to solve the engine vibration problem of commercial vehicles, it is usually to replace the engine mount pads and increase the stiffness of the mount pads so that the stiffness of the four mount pads at the front and rear of the engine is kept in good consistency. There is no control strategy from the engine body as well as changes in the internal structure to adjust

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