A Study on Performance of Common Rail Direct Injection Engine with Multiple‑Injection Strategies

摘要

Diesel engines are robust and reliable besides their good fuel economy. However, these engines produce higher exhaustemissions with fossil diesel and further these emissions level increases when operated on biodiesels. A common rail directinjection (CRDi) engine shows higher brake thermal efficiency (BTE) and lower emissions as compared to compression ignitionmode (CI mode) of engine operation. This research paper revealed the results of diesel engine operated in CRDi modewith single injection (SI) and multi-injections (MI) of fuel using diesel and biodiesel of honne oil at 80% load. The CRDiengine operation with both SI and MI showed higher BTE and lower emissions as compared to CI mode. The peak pressureand heat release rate of a CRDi engine operation were lower as compared to CI mode. Overall, it could be concluded thatbiodiesel-powered CRDi engine with double injection and triple injection could reduce oxides of nitrogen ( NO_x) emissionsby 40.8% and 50%, respectively, while smoke emission by 10% and 16.6%, respectively. However, there was a little penaltyon BTE and brake-specific fuel consumption.