Compound turbo system can achieve a good match with the diesel engine in the whole range of operating conditions, improving diesel power

Energy shortage and environmental pollution are two major challenges that face the world today, the development of efficient, clean diesel engine is a key issue in the study. Conventional exhaust gas turbocharger is difficult taking into account the high-speed, low-speed diesel engine operating conditions, the simultaneous existence of part-load economy and acceleration performance and poor. Compound turbo system can be implemented in the whole operating range of diesel engines with a good match, improving the engine power, economy and emissions, has drawn  Stainless steel needle valve  at home and abroad. Firstly, the use of software to establish a composite turbocharged diesel engine simulation model and numerical simulation. The simulation results show that the composite turbocharged engine to improve low-speed, high-speed power and economy. Meanwhile, the composite obtained by numerical simulation turbo intake system and exhaust bypass valve bypass valve control strategy provides a reference for the trial.  2 way manifolds  optional turbocharged, engine bench tests conducted research complex turbocharged. Were matched based on the high-pressure stage turbocharger optimal fuel economy principles. Composite turbocharged program conducted to determine control strategies of different speed and load, the effect of the exhaust bypass valve and the intake bypass valve opening on engine performance, determine the total working conditions and wastegate intake bypass valve opening degree control.