Results 251 to 260 of about 955,526 (285)

Evaluation on combustion and lean-burn limitof a medium compression ratio hydrogen/methanol dual-injection spark-ignition engine under methanol late-injection

Applied Energy, 2020
Lean-burn is an effective way to optimize the fuel economy of spark-ignition methanol engines. Hydrogen-assisted combustion can improve the stability of combustion and increase the lean-burn limit of such engines.
Jingzhen Sun, Changming Gong
exaly   +2 more sources

Assessment of ultra-lean burn characteristics for a stratified-charge direct-injection spark-ignition methanol engine under different high compression ratios

Applied Energy, 2020
Lean burn is one of the most important characteristics of a stratified-charge direct-injection spark-ignition engine. In this study, a non-uniform 10-hole × 0.30 mm spray-line distribution nozzle was chosen to achieve stratified-charge of the methanol ...
Jingzhen Sun, Changming Gong
exaly   +2 more sources

Comparative analysis on combustion and emissions between CO2 and EGR dilution GDI engine at half-load, stoichiometric and lean-burn conditions

Fuel, 2022
In this paper, CO2 or EGR (exhaust gas recirculation) as dilution gas was introduced into the intake system. The impacts of CO2 or EGR dilution on combustion and emissions of a GDI (gasoline direct injection) engine at half-load, stoichiometric and lean ...
Chang-Ming Gong, Xiankai Si, Feng-Hua Liu   +2 more
semanticscholar   +1 more source

Comparative study on combustion and emissions between methanol port-injection engine and methanol direct-injection engine with H2-enriched port-injection under lean-burn conditions

Energy Conversion and Management, 2019
Lean-burn is an effective way to improve thermal efficiency and reduce emissions of spark-ignition (SI) engines. A hydrogen (H2) enrichment combustion strategy can extend the lean-burn limits of SI engines. Two engines equipped with hydrogen and methanol
Chang-Ming Gong, Zhao-Hui Li, Lin Yi, Feng-Hua Liu   +3 more
semanticscholar   +1 more source

Experimental study the effects of various compression ratios and spark timing on performance and emission of a lean-burn heavy-duty spark ignition engine fueled with methane gas and hydrogen blends

Energy, 2019
To investigate effects of various compression ratios (CRs) and spark timing on characteristics of performance and emissions, a high CR six-cylinder heavy-duty compression ignition diesel engine was modified into the port fuel injection hydrogen and ...
Xiongbo Duan, Yang-Yang Li, Jing-Ping Liu, Gen-Miao Guo, Jianqin Fu, Quan-Chang Zhang, Shi-Heng Zhang, Wei-Qiang Liu   +7 more
semanticscholar   +1 more source

An experimental study the impact of the hydrogen enrichment on cycle-to-cycle variations of the large bore and lean burn natural gas spark-ignition engine

, 2020
In this study, in order to investigate the impacts of the hydrogen enrichment on the combustion cyclic variability, five cases with different hydrogen energy shares were selected to unveil their influences on the cycle-to-cycle variations of the large ...
Xiongbo Duan, Bang-Lin Deng, Yi-Qun Liu, Shun-Zhang Zou, Jing-Ping Liu, Ren-Hua Feng   +5 more
semanticscholar   +1 more source

Experimental and numerical analyses of cold EGR effect on combustion, performance and emissions of natural gas lean-burn engine with pre-chamber combustion system

Fuel, 2020
The pre-chamber combustion system is an attractive strategy to enable the operation of spark-ignition engines in lean conditions and to maintain a suitable combustion process.
M. Talei, S. Jafarmadar, Shahram Khalilarya   +2 more
semanticscholar   +1 more source

Study on lean burn limits and burning characteristics of n-heptane with effects of hydrogen enrichment

International journal of hydrogen energy, 2020
Lean combustion can be a more effective method to enhance the thermal efficiency of diesel engine, while also face incomplete-combustion and long-combustion duration issues at ultra-lean conditions.
M. Akram, Fushui Liu, Han Wu
semanticscholar   +1 more source