An experimental investigation of the effects of fuel injection strategy on the efficiency and emissions of a heavy-duty engine at high load with gasoline compression ignition

Zou, Xionghui; Liu, Weiwei; Lin, Zhanglei; Wu, Binyang; Su, Weifeng

doi:10.1016/j.fuel.2018.02.035

Cited by 12 publications

(1 citation statement)

References 26 publications

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“…It is found that the injection strategy substantially affects fuel stratification and combustion phase, and the restricted ringing intensity (RI) can be met with the assistance of EGR. Zou et al 9 combined the strategies of late intake valve closing, multiple injection, and intake pressure boost, which effectively reduced the RI at high loads and increased thermal efficiency up to 52.3%. In addition, Wang et al 10 explored the effect of fuel injection strategy on the performance of a GCI engine at high loads, and the results showed that late pilot injection and port injection were beneficial to improve thermal efficiency.…”

Section: Introductionmentioning

confidence: 99%

Co-optimization of operating parameters, fuel composition, and piston bowl geometry of gasoline compression ignition (GCI) engine at high loads

Zhang

Duan

et al. 2023

International Journal of Engine Research

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Focusing on the gasoline compression ignition (GCI) combustion mode, the operating parameters, fuel composition, and piston bowl geometry were collaboratively optimized at high loads to improve engine performance. A meliorative genetic algorithm coupled with a three-dimensional computational fluid dynamics (CFD) program was adopted as the optimization tool. The optimal GCI combustion strategy is summarized based on the optimization results, and the key parameters affecting engine performance at high loads are further analyzed. The results show that the employment of the open-type piston bowl, high-reactivity fuel, and late start of injection (SOI) is desirable for GCI engines at high loads. Under this strategy, fuel burns in multiple stages, which can reduce the heat release rate and advance the combustion phase. The width of the piston bowl is the geometric parameter with the most notable impact on GCI combustion. Due to the weaker turbulent kinetic energy and the smaller surface area, the larger piston bowl width is conducive to diminishing the heat transfer losses of the engine and promoting the oxidation of unburned hydrocarbon (HC) emissions. Relative to the optimal case, the strategy with the open-type piston bowl, high-reactivity fuel, and early SOI can reduce fuel consumption but results in a higher in-cylinder pressure rise rate and increased ringing intensity (RI). On the contrary, the re-entrant type piston bowl, low-reactivity fuel, and late SOI can significantly reduce the pressure rise rate and RI while deteriorating thermal efficiency.

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Section: Introductionmentioning

confidence: 99%