This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Jet Air Suction Port (JASP) Improves Fuel Consumption of 4-Stroke Cycle Gasoline Engines at Idle
Annotation ability available
Sector:
Language:
English
Abstract
On 4-stroke cycle engines, the authors reported that under certain conditions the cylinder pressure, measured during the suction stroke with a low-pressure pickup, dropped below the critical pressure. Noting this considerable negative cylinder pressure during the suction stroke, the authors devised a Jet Air Suction Port (JASP), which was opened and closed by piston movement near bottom dead center.
As a result, it was possible not only to burn lean mixtures steadily, but also to decrease the fuel consumption 10 to 30 % at idle by the jet air flow generated automatically from the JASP. Reductions in THC, CO and NO at idle were also noted.
Authors
Citation
Okanishi, N., Fukutani, I., and Watanabe, E., "Jet Air Suction Port (JASP) Improves Fuel Consumption of 4-Stroke Cycle Gasoline Engines at Idle," SAE Technical Paper 820155, 1982, https://doi.org/10.4271/820155.Also In
References
- Nakamura Y. et al. “Development of A New Combustion System (MCA-JET) in Gasoline Engine.” SAE Paper No. 780007 presented at the SAE Congress, Detroit 1978
- Yamashxta R. Matsumoto, H. “Application of YICS to Gasoline Engine.” Nainen-Kikan ( Internal Combustion Engine) 20 1981-3 247 17
- Ehrlich, J. U.S.Patent No. 4,162,663, issued Jul.31 1979
- Fukutani I. Watanabe, E. “An Analysis of the Volumetric Efficiency Characteristics of 4-Stroke Cycle Engines Using the Mean Inlet Mach Number Mim.” SAE Paper No. 790484 presented at the SAE Congress, Detroit, 1979, SAE Trans. 88 1979 1756
- Uchiyama, Y. Kontani, K. et al. “Internal Exhaust Gas Recirculation System for Reduction of NOx in Diesel Engine.” SAE of Japan Journal 33 1979 9 763
- Watanabe E. Fukutani, I. “Reduction of Diesel Idle Knock by EGR.” SAE Paper No. 810296 presented at the SAE Congress, Detroit 1981