Experimental study on controlled pulse turbocharging system for a six-cylinder diesel engine

Abstract

The controlled pulse turbocharging (CPT) system can realize the switch between two charging modes by a control valve, and it can give a good performance at both the high speed operation and the low speed operation. This paper puts forward a newly designed CPT system for a six-cylinder diesel engine, and the propeller characteristic experiments about it have been carried out. The experimental results indicate that the switch point for the control valve of the CPT system is at 75 % load. On 25 % load case, the pulse energy can be utilized fully when the pulse turbocharging system is used, and the brake specific fuel consumption (BSFC) can be reduced by 6.7 g/kWh. On 100 % load case, the pumping loss can be reduced fully when the semi-constant pressure turbocharging system is used, and the BSFC can be reduced by 5.1 g/kWh.