Experimental Research on the Injection Rate of DME and Diesel Fuel in Common Rail Injection System by Using Bosch and Zeuch Methods

Energies

Changhee Lee¹  Seemoon Yang² 

[1] Department of Mechanical and Automotive Engineering, Songwon University, Songarm-ro, Gwangju 61756, Korea;Leaders in Industry-University Cooperation (LINC) of Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju 61452, Korea;

关键词: injection rate;    injection quantity;    Zeuch method;    Bosch method;    pilot injection;    main injection;    dimethyl ether (DME);    solenoid respond loss;    ECU (Electric Control Unit);    BTDC (Bottom top dead center);    TWV (Two way valve);   

DOI  :  10.3390/en11020273

来源: DOAJ

【 摘 要 】

This study investigates a preliminary injection characterization of the injection rate and the injection quantity behavior in a high-pressure common rail injection system used in a heavy-duty engine. The injection rate meter and the injection quantity meter used in the test meter measuring systems were jointly connected under the Zeuch method measurement principles at a constant volume chamber and under the Bosch method measurement principles at a long pipe flow. The trade-off trend for the injection rate and the injection quantity was observed according to the injection pressure. As expected, fuel injection with pilot injection affected the spray quantity and the injection evolution of subsequent fuel injection without pilot injection in dimethyl ether and diesel fuel. The pressure variations in the initial injection duration (2000–6000 µs) of the main and pilot injections for diesel and DME were similar. However, after 7000 µs, the pressure of DME increased more rapidly compared to that of diesel. This finding was the result of the rapid density changes caused by the nature of compressive fluid. Therefore, the DME supply pump was expected to require a higher drive energy by approximately 20% compared to that of the diesel supply pump.

【 授权许可】

Unknown