Internal-combustion engines – Two-cycle – Rear compression
Patent
1997-02-13
1998-08-11
Okonsky, David A.
Internal-combustion engines
Two-cycle
Rear compression
123299, F02D 908
Patent
active
057913048
ABSTRACT:
A cross-scavenged, two-cycle internal combustion engine has a low-pressure, cylinder wall fuel injection system that is practical for multi-cylinder marine engines. It also reduces the amount of unburned hydrocarbons in exhaust emissions when compared to a conventional carbureted two-cycle, cross-scavenged engine. The fuel injectors are mounted through the cylinder walls so that the fuel spray contacts a deflector on the piston crown. The fuel vaporizes upon contact, and scavenging air flow from the deflector towards the spark plug electrode convects the vaporized fuel towards the spark plug electrode, thereby reducing the likelihood of short circuiting of unburned fuel through the exhaust port before the exhaust port closes and compression begins. All fuel is injected into the piston cavity before the exhaust port closes. In a multi-cylinder engine, all of the fuel injectors are mounted to have parallel spray axes and coplanar top ends, thus allowing the use of a straight fuel rail and convenient mounting techniques. Low-pressure fuel (e.g., 36 to 100 psi) is provided to the fuel rail and to the injectors, and the operation of the fuel injectors is controlled by an electronic control unit. Two fuel injectors can be provided for each cylinder to provide additional fuel injection capabilities. Various systems are disclosed for supplying pressurized fuel to the fuel rail.
REFERENCES:
patent: 3026862 (1962-03-01), Fisher
patent: 3196926 (1965-07-01), Gartland
patent: 3831563 (1974-08-01), Brittain et al.
patent: 3835822 (1974-09-01), Mickle et al.
patent: 3993030 (1976-11-01), Jaulmes
patent: 4088098 (1978-05-01), Rose et al.
patent: 4290394 (1981-09-01), Frank et al.
patent: 4446830 (1984-05-01), Simko et al.
patent: 4491117 (1985-01-01), Koide
patent: 4721075 (1988-01-01), Kasai
patent: 4768474 (1988-09-01), Fujimoto et al.
patent: 4768492 (1988-09-01), Widmer et al.
patent: 4787343 (1988-11-01), Tuckey
patent: 4790270 (1988-12-01), McKay et al.
patent: 4941999 (1990-07-01), Noisier
patent: 5020485 (1991-06-01), Watanabe
patent: 5058548 (1991-10-01), Morikawa et al.
patent: 5103793 (1992-04-01), Riese et al.
patent: 5115776 (1992-05-01), Ohno et al.
patent: 5237966 (1993-08-01), Katch et al.
patent: 5259344 (1993-11-01), Huany et al.
patent: 5284111 (1994-02-01), Geyer et al.
patent: 5335635 (1994-08-01), Kadoi et al.
patent: 5389245 (1995-02-01), Jaeger et al.
patent: 5404856 (1995-04-01), Servati
patent: 5553579 (1996-09-01), Yoshida et al.
A Study of Two-Stroke Cycle Fuel Injection Engines for Exhaust Gas Purification, Yamagishi et al., Automotive Engineering and Exposition, Jan., 1972, pp. 253-272.
Fuel Injection of a Two-Stroke Cycle Spark Ignition Engine, R. Douglas et al., SAE The Engineering Resource for Advancing Mobility, #820952, Aug. 16-19, 1982, pp. 1-14.
Low-Pressure Discontinuous Gasoline Injection in Two-Stroke Engines, Grasas-Alsina et al., SAE The Engineering Resource for Advancing Mobility, #860168, Feb. 24-28, 1986, pp. 1-14.
The Nozzle Location and the Shape of Its Surroundings in the Cylinder of Small Two-Stroke Engine, Francisek et al., SAE The Engineering Resource For Advancing Mobility, #860169, Feb. 24-28, 1986, pp. 1-7.
Mixture injection application for avoiding charge exchange losses in two-strike cycle engines, Kuntscher et al., IMechE, 1989, C372/025, pp. 117-122, Mar. 31, 1993.
Fuel Atomization With Mixture Preparation Systems of SI-Engines, Lenz et al., #885015, pp. 1.109-1.117, May, 1985.
Comparative Investigation on Fuel Feed Methods in Two-Stroke, Cycle Methanol Engine, Kubota et al., SAE International, #922312, Oct. 19-22, 1992, pp. 1652-1659.
Gasoline Direct Injection for a Loop-Scavenged Two-Stroke Cycle Engine, Sato et al., SAE #871690, Sep. 14-17, 1987, pp. 1-14.
Direct Fuel Injection: Piaggio Approach to Small 2T SI Engines, Nuti, SAE #880172, Feb. 29 -Mar. 4, 1988, pp. 1-17.
Low-Pressure Electronic Fuel Injection System for Two-Stroke Engines, Vieilledent, Society of Automotive Engineers, Technical Paper Series, #780767, Sep. 11-14, 1978, pp. 1-14.
200 DFI (Direct Fuel Injected) Service Manual, Brunswick Corp., 90-850153R1, Mar. 1996, p. 36.
Brunswick Corporation
Okonsky David A.
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