Refitting And Performance Simulation Verification Of The Valve Train In Piston 6 Engine

The fully variable valve technology has great prospects in improving the power economy and emissions of engine. At the same time, variable cylinder,single-cylinder ceasefire and engine braking are realized through the control of variable valve. This paper is based on the designment of a certain type of trainer ground simulation training platform. It analyzed the technical feasibility of refitting the valve mechanism firstly, and then refitted the valve mechanism. The cam gear was replaced by electro-hydraulic variable valve system to control the air valve. It can drive the single cylinder, stop certain cylinder and simulating a variable of value failure on the ground. It can totally meet the requirements of teaching and training in all conditions. Details are as follows:Firstly, this paper analyzed the technical characteristics and retrofit applications of Piston 6 and demonstrated the feasibility of refitting the valve mechanism. At the same time, it determined the total design scheme based on the structure parameters of Piston 6 and structural principle of variable valve.Secondly, it built the hydraulic model of the fully variable valve actuator based on the AMESim and finished the modification of gas distribution system through simulation analysis.At last,it built the model of the fully variable valve drive control system and the whole working process model of Piston 6 based on the GT—Power. It optimized gas distribution parameter and verified the performance after refitting through simulating.Simulation results show that the modified gas distribution system can totally meet requirements and at the same time, it improves the power, economy and emissions of Piston 6.According to the technical characteristics of the variable valve,it implements gas distribution system modification purposes which meet the new conditions and engine failure simulation training needs.