可变进排气供油正时涡轮增压柴油机的研究

提出了一种改善车用高速增压中冷柴油机低速大扭矩性能的自动变进排气供油正时（ＡＶＩＥＩＴ）涡轮增压系统，阐述了ＡＶＩＥＩＴ系统的基本原理。

Study on the Automatic Variable Inlet Exhaust Injection Timing Turbocharging System

A turbocharging system of automatic variable inlet exhaust injection timing (AVIEIT) to improve slow speed,high torque performance of high speed turbocharged intercooled diesel engine for vehicle use was proposed.The basic theory of AVIEIT was explained.By using finite volume method program,a great quantity of performance optimization simulations were carried out for 12V150 and D6114 diesel engine using AVIEIT system.Simulation results show that AVIEIT system has functions of improving cylinder air quanlity at slow speed,high torque operating mode,and substituting waste gate system at high speed operating mode.Design and calculation of AVIEIT control mechanism were carried out.Basic governing equations were derived.General design and calculation steps of control mechanism were presented.A whole AVIEIT timer was designed.Principle experiment of AVIEIT system was studied.Experiment results show that AVIEIT system has functions of improving economy performance and decreasing emissions.