Study on the Effect of Second Injection Timing on the Engine Performances of a Gasoline/Hydrogen SI Engine with Split Hydrogen Direct Injecting

Guanting Li, Xiumin Yu, Ping Sun and Decheng Li
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Guanting Li: State Key Laboratory of Automotive Simulation and Control, Jilin University, Renmin Street 5988, Changchun 130022, Jilin, China
Xiumin Yu: State Key Laboratory of Automotive Simulation and Control, Jilin University, Renmin Street 5988, Changchun 130022, Jilin, China
Ping Sun: State Key Laboratory of Automotive Simulation and Control, Jilin University, Renmin Street 5988, Changchun 130022, Jilin, China
Decheng Li: State Key Laboratory of Automotive Simulation and Control, Jilin University, Renmin Street 5988, Changchun 130022, Jilin, China

Energies, 2020, vol. 13, issue 19, 1-14

Abstract: Split hydrogen direct injection (SHDI) has been proved capable of better efficiency and fewer emissions. Therefore, to investigate SHDI deeply, a numerical study on the effect of second injection timing was presented at a gasoline/hydrogen spark ignition (SI) engine with SHDI. With an excess air ratio of 1.5, five different second injection timings achieved five kinds of hydrogen mixture distribution (HMD), which was the main factor affecting the engine performances. With SHDI, since the HMD is manageable, the engine can achieve better efficiency and fewer emissions. When the second injection timing was 105° crank angle (CA) before top dead center (BTDC), the P max was the highest and the position of the P max was the earliest. Compared with the single hydrogen direct injection (HDI), the NO X , CO and HC emissions with SHDI were reduced by 20%, 40% and 72% respectively.

Keywords: hydrogen direct injection; split injection; second injection timing; hydrogen mixture distribution; combustion; emission (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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