Multipulse Ballistic Injection: A Novel Method for Improving Low Temperature Combustion with Early Injection Timings

Márton Virt, Gergely Granovitter, Mate Zoldy, Ádám Bárdos and Ádám Nyerges
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Márton Virt: Department of Automotive Technology, Budapest University of Technology and Economics, H-1111 Budapest, Hungary
Gergely Granovitter: Department of Automotive Technology, Budapest University of Technology and Economics, H-1111 Budapest, Hungary
Ádám Bárdos: Department of Automotive Technology, Budapest University of Technology and Economics, H-1111 Budapest, Hungary
Ádám Nyerges: Department of Automotive Technology, Budapest University of Technology and Economics, H-1111 Budapest, Hungary

Energies, 2021, vol. 14, issue 13, 1-17

Abstract: Nowadays, increasingly stricter regulations on emission reduction are inducing rapid developments in combustion science. Low-temperature combustion (LTC) is an advanced combustion technology that increases an engine’s thermal efficiency and even provides low emissions of nitrogen oxides (NO x ) and particulate matter (PM). The technology often uses early direct injections to achieve sufficient mixture homogeneity. This leads to increasing wall wetting and lower combustion efficiency. This paper introduces the Multipulse ballistic injection (MBI) method to improve combustion with early injection timings. The research was carried out in a four-cylinder medium-duty diesel engine with high-pressure exhaust gas recirculation (HP-EGR). The investigation was divided into two experiments. In the first experiment, MBI was examined without EGR, and in the second, EGR was applied to study its effects. It was found that the MBI strategy decreased wall wetting and increased homogeneity and the indicated mean effective pressure (IMEP) at early injection angles.

Keywords: low temperature combustion; multipulse ballistic injection; wall wetting; mixture homogeneity (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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