Research On The Work Process Characteristics Of Engine Valve Train Model

Valve-train mechanism is an important component part of the engine,the working performance of the valve-train mechanism is directly related to the running status of the whole machine and the power,economy,discharge and reliability of the whole engine.Although the main function of the valve-train mechanism is to meet the engine on the exhaust system requirements.But its work performance and reliability of the machine will have an important impact,while the valve with the vibration and noise also need us to pay attention to the problem urgently.With the internal combustion engine on the high power density,low fuel consumption,low noise,low pollution,high reliability requirements,the requirements of the valve will be higher and higher,the valve with the dynamic performance and the strength of the parts Must meet the relevant requirements.Therefore,it is very important to study the dynamics and kinematic characteristics of the engine gas distribution mechanism.The valve-train mechanism and kinematics and dynamic calculation model of the engine are established,the design of the cam profile is optimized based on the system analysis software of the valve train,The main dynamic parameters of the engine are analyzed,including the valve lift,speed,Acceleration,seizure force,valve timing,intake cam and tappet contact stress.In this paper,the dynamic simulation of the valve-train mechanism is simulated by theoretical calculation and software simulation.According to the theoretical design method of the valve-train cam profile and the basic parameters of the internal combustion engine are set and selected,the optimization and design evaluation of the cam profile are carried out.The valve model is established and simulated by the professional software ETD.Dynamic characteristics of the calculation,and the valve parts of the key components of the sensitivity and quality analysis.The calculation results show that the parameters of the kinetic parameters.Within the scope of the design permit,the results of the calculation of the valve in-depth understanding of the working characteristics,as well as the valve system design and development of the system has a certain reference value...