A Numerical Investigation of Mixture Formation and Combustion Characteristics of a Hydrogen-Diesel Dual Direct Injection Engine

2021 ◽  
Author(s):  
Ye Wang ◽  
Annabelle Evans ◽  
Ales Srna ◽  
Armin Wehrfritz ◽  
Evatt Hawkes ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Direct Injection ◽  
Combustion Characteristics ◽  
Mixture Formation ◽  
Direct Injection Engine

Combustion characteristics of a direct-injection engine fueled with natural gas–hydrogen blends under different ignition timings

Fuel ◽  
2007 ◽  
Vol 86 (3) ◽  
pp. 381-387 ◽  
Author(s):  
Zuohua Huang ◽  
Jinhua Wang ◽  
Bing Liu ◽  
Ke Zeng ◽  
Jinrong Yu ◽  
...  
Keyword(s):  
Natural Gas ◽  
Direct Injection ◽  
Combustion Characteristics ◽  
Direct Injection Engine

Combustion Characteristics of Methane Direct Injection Engine Under Various Injection Timings and Injection Pressures

2017 ◽  
Vol 139 (8) ◽  
Author(s):  
Jingeun Song ◽  
Mingi Choi ◽  
Daesik Kim ◽  
Sungwook Park
Keyword(s):  
Fuel Injection ◽  
Direct Injection ◽  
Injection Pressure ◽  
Combustion Characteristics ◽  
Direct Injection Engine ◽  
Optical Engine ◽  
Start Of Injection ◽  
Crank Angle ◽  
Combustion Speed ◽  
Injection Pressures

The performance of a methane direct injection engine was investigated under various fuel injection timings and injection pressures. A single-cylinder optical engine was used to acquire in-cylinder pressure data and flame images. An outward-opening injector was installed at the center of the cylinder head. Experimental results showed that the combustion characteristics were strongly influenced by the end of injection (EOI) timing rather than the start of injection (SOI) timing. Late injection enhanced the combustion speed because the short duration between the end of injection and the spark-induced strong turbulence. The flame propagation speeds under various injection timings were directly compared using crank-angle-resolved sequential flame images. The injection pressure was not an important factor in the combustion; the three injection pressure cases of 0.5, 0.8, and 1.1 MPa yielded similar combustion trends. In the cases of late injection, the injection timings of which were near the intake valve closing (IVC) timing, the volumetric efficiency was higher (by 4%) than in the earlier injection cases. This result implies that the methane direct injection engine can achieve higher torque by means of the late injection strategy.

Effects of High Temperature Fuel on In-Cylinder Fuel Mixture Formation Process for Direct Injection Engine

2003 ◽  
Author(s):  
Kenjiro Nakama ◽  
Eiji Murase ◽  
Masahito Imada ◽  
Jin Kusaka ◽  
Yasuhiro Daisho
Keyword(s):  
High Temperature ◽  
Formation Process ◽  
Direct Injection ◽  
Fuel Mixture ◽  
Mixture Formation ◽  
Direct Injection Engine
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