A study on the injection characteristics of a liquid-phase liquefied petroleum gas injector for air-fuel ratio control

Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering - Tập 219 Số 8 - Trang 1037-1046 - 2005
Han-Sub Sim1, Kang Yoon Lee2, Namhoon Chung2, Myoungho Sunwoo2
1Department of Automotive Engineering, Jinju National University, Jinju, Republic of Korea
2Department of Automotive Engineering, Hanyang University, Seoul, Republic of Korea

Tóm tắt

Liquefied petroleum gas (LPG) is widely used as a gaseous fuel in spark ignition engines because of its considerable advantages over gasoline. However, the LPG engine suffers a torque loss because the vapour-phase LPG displaces a larger volume of air than do gasoline droplets. In order to improve engine power as well as fuel consumption and air-fuel ratio control, considerable research has been devoted to improving the LPG injection system. In the liquid-phase LPG injection systems, the injection rate of an injector is affected by the fuel temperature, injection pressure, and driving voltage. When injection conditions change, the air-fuel ratio should be accurately controlled in order to reduce exhaust emissions. In this study, correction factors for the fuel injection rate are developed on the basis of fuel temperature, injection pressure, and injector driving voltage. A compensation method to control the amount of injected fuel is proposed for a liquid-phase LPG injection control system. The experimental results show that the liquid-phase LPG injection system works well over the entire range of engine speeds and load conditions, and the air-fuel ratio can be accurately controlled by using the proposed compensation algorithm.

Từ khóa


Tài liệu tham khảo

Sierens R. An experimental and theoretical study of liquid LPG injection. SAE paper 922363, 1992.

Lutz B. R., Stanglmaier R. H., Matthews R. D., Cohen J. T., Wicker R. The effects of fuel composition, system design, and operating conditions on in-system vaporization and hot start of a liquid-phase LPG injection system. SAE paper 981388, 1998.

Kim J. C., Cho G. B., Jeong D. S. Characteristics of spray and combustion in direct injection LPG engine according to combustion chamber shapes. In Spring Conference Proceedings of the Korean Society of Automotive Engineers, 2000, Vol. I, pp. 73–78.

10.1243/0954407041580058

Vialle Alternative Fuel Systems BV, 2001 http://www.vialle.nl/

Han B. J., 2001, Trans. Korean Soc. Automot. Engrs, 9, 46

1979, LP Gas Technology

Song C. S., 1995, J. Korean Soc. Precision Engng, 12, 122

Heywood J. B., 1988, Internal Combustion Engine Fundamentals

Thông tin
Thông tin xuất bản

Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering

Tập 219 Số 8

1037-1046

Thông tin tác giả