Effects of injection timing and compression ratio on the combustion performance and emissions of a two-stroke DISI engine fuelled with aviation kerosene

Ning, Le; Duan, Qimeng; Wei, Yuhao; Zhang, Xin; Yu, Kang; Yang, Bo; Zeng, Ke

doi:10.1016/j.applthermaleng.2019.114124

Cited by 40 publications

(9 citation statements)

References 44 publications

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“…This idea was called the "single fuel concept ve and the aviation fuel JP-8 fuel (also called F34) was chosen as the uniform fuel to be used in military aviation and military road transport (Lee, Oh et al 2012). The main reason for this practice is to prevent high logistics expenditures in times of war and to ensure that fuel control is performed more effectively by NATO (Ning, Duan et al 2019).…”

Section: Indroductionmentioning

confidence: 99%

Effects of Using Jp8-Diesel Fuel Mixtures in a Pump Injector Engine on Engine Emissions

Aydoğan¹

2019

Proceedings of the 50th International Academic Conference, Paris

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JP-8 fuel used in the aviation industry, especially in military fields, is used as a common military fuel between NATO countries. As the basic substance of JP-8 fuel, kerosene flares at high temperatures directly increases aircraft safety and freezing point is around-49 °C, it is advantageous to use easily in fuel systems. In this study, the effects of jp-8 and diesel fuel mixtures on engine emissions were investigated experimentally. A 3-cylinder, four-stroke, turbocharged diesel engine with pump injector fuel system was used for this purpose. 5% JP8 was added to diesel fuel. It was used as a fuel in the engine and the obtained values were analyzed according to the diesel fuel.

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Section: Indroductionmentioning

confidence: 99%

Effects of Using Jp8-Diesel Fuel Mixtures in a Pump Injector Engine on Engine Emissions

Aydoğan¹

2019

Proceedings of the 50th International Academic Conference, Paris

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“…The fuel short-circuit loss is reduced due to the delayed injection phase, and a well-atomized spray improves the starting performance and suppresses the knocking tendency [12]. Many studies have investigated the effect of the DI parameters on the heavyfuel engine performance and emissions using low-pressure common rail systems for gasoline direct-injection (GDI) engines [13]- [15]. The common rail solution provides a higher fuel pressure, but the mechanical system is too complicated to miniaturize.…”

Section: Introductionmentioning

confidence: 99%

Drive Control Experimental Studies on the Injection Characteristics of a Self-Pressurized Injector

Wei

Liu

et al. 2021

IEEE Access

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As a miniaturized direct-injection (DI) solution, a self-pressurized injector is of great significance for small aviation piston engines, such as the spark-ignited two-stroke heavy-fuel engines. Accurate control of the timing and amount of injections is an important application prerequisite. In this paper, a high-speed camera is employed to study the spray characteristics, injection delay and fuel injection duration under three drive modes in a constant-volume bomb environment. The results show that the 8-A constantcurrent drive mode ensures the minimum injection dead zone and linearity of the flow characteristic curve, and the spray characteristics are close to those under a peak current of 10 A and holding current of the 8-A drive mode, which indicates that the drive circuit can be simplified. Ambient pressure increase leads to an increased injection delay and shortened injection duration. Therefore, it is recommended to apply the 10-A constant-current drive mode to reduce the impact of the ambient pressure. The double-injection characteristics of the self-pressurized injector are also studied, and the results demonstrate that when the interval time is reduced to 2 ms, the spray characteristics of the secondary injection are affected, and when the interval time is reduced to 0.2 ms, the spray characteristics of the primary injection are also affected. To ensure consistency of the spray characteristics, the minimum spray interval should be longer than 3 ms. INDEX TERMS aviation aircraft, direct injection, spray characteristics, piston engine, self-pressurized injector.

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“…vehicles [3]. The common rail solution provides an extremely high fuel pressure, but the mechanical system is too complicated to miniaturize.…”

Section: Introductionmentioning

confidence: 99%

Drive Control Simulation and Experimental Studies on the Flow Characteristics of a Pump Injector

Wei

et al. 2020

IEEE Access

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As a miniaturized direct injection (DI) solution, the pump injector is of great significance for small aviation piston engines, such as two-stroke heavy-fuel engines. The accurate control of the timing and amount of injections is an important application prerequisite. In this paper, the flow characteristics of a pump injector with different driving circuits and parameters are investigated. The effects of the power supply and freewheeling circuits on the opening and closing delays are theoretically studied. A schematic of a self-designed logic control circuit is proposed, and it achieves peak and hold current control without software intervention. Simulations and experiments are carried out, and the drive current and flow characteristics in different states are measured. The results show that when driving a solenoid with a high internal resistance of 2.70 , a single power supply is more suitable, and the variable-freewheeling circuit exhibits excellent performance in terms of control accuracy and energy recovery. Notably, the invariable-freewheeling circuit results in nonlinear flow characteristics, and the nonlinear segment corresponds to the drive current transitioning from the peak value to the hold value. In contrast, the variable-freewheeling circuit overcomes this problem. To comprehensively consider solenoid opening and closing delays, energy consumption and the linearity of the flow characteristics during injection, a peak current of 10 A and a hold current of 8 A are adopted. INDEX TERMS Aviation aircrafts, direct injection, flow characteristics, peak and hold drive, piston engine, pump injector.

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Effects of injection timing and compression ratio on the combustion performance and emissions of a two-stroke DISI engine fuelled with aviation kerosene

Cited by 40 publications

References 44 publications

Effects of Using Jp8-Diesel Fuel Mixtures in a Pump Injector Engine on Engine Emissions

Effects of Using Jp8-Diesel Fuel Mixtures in a Pump Injector Engine on Engine Emissions

Drive Control Experimental Studies on the Injection Characteristics of a Self-Pressurized Injector

Drive Control Simulation and Experimental Studies on the Flow Characteristics of a Pump Injector

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