EFFECT OF BOOST PRESSURE AND INJECTION STRATEGY TO THE IN-CYLINDER PRESSURE AND HEAT RELEASE RATE OF DIRECT INJECTION DIESEL ENGINE

Willyanto, and Ichiyanagi, Mitsuhisa and TANUWIJAYA, DION VALENTINO and DANU, JOVAN DANIEL and Yilmaz, E. and Chen, Haoyu and GOTAMA, GABRIEL JEREMY and Suzuki, Takashi (2020) EFFECT OF BOOST PRESSURE AND INJECTION STRATEGY TO THE IN-CYLINDER PRESSURE AND HEAT RELEASE RATE OF DIRECT INJECTION DIESEL ENGINE. [UNSPECIFIED]

	PDF Download (983Kb)
	PDF Download (4Mb)
Preview	PDF (paper - Willyanto) Download (2818Kb) | Preview
Preview	PDF (Korespondensi - Willyanto) Download (1041Kb) | Preview
Preview	PDF (Peer review - Willyanto) Download (952Kb) | Preview

Abstract

An optimum diesel engine helps to solve the increasing energy demand, the depletion of fossil fuels, and the environmental problems from the utilization of combustion engines. To optimise the operation of a direct injection diesel engine, the effects of various boost pressures under different rotations and main injection timings were studied experimentally and numerically. The boost pressure was set between 0 kPa to 60 kPa with increment of 20 kPa using a supercharger. The engine rotation was set between 800 RPM to 2000 RPM with an increment of 400 RPM. The main injection timing was varied with 2° increment from 1° BTDC to 3° ATDC. The results indicated the increase of in-cylinder pressure and heat release rate with increased boost pressure. Higher engine rotation led to the decrease of the maximum heat release rate, maximum in-cylinder pressure, and the difference between the magnitude of the first and second onsets of the in-cylinder pressure raise. It also shifted the timing for the peak of the heat release rate to occur further away from TDC. The change of the main injection timing from 1° BTDC to 3° ATDC decreased the maximum in-cylinder pressure and moved the location of the maximum in-cylinder pressure away from TDC. The delay of the main injection timing brought larger in-cylinder pressure raise for the first onset but lower cumulative heat release rate. The difference between experimental and numerical measurements of the in-cylinder pressure was found to be less than 4%. The results of the study suggested that boost pressure of 60 kPa and main injection timing of the 1° BTDC provide higher in-cylinder pressure and cumulative heat release rate and consequently better engine performance.

Actions (login required)