Internal-combustion engines – Two-cycle – Rear compression
Patent
1989-06-28
1991-01-15
Wolfe, Willis R.
Internal-combustion engines
Two-cycle
Rear compression
123533, 123489, F02D 4114, F02M 2306
Patent
active
049845403
ABSTRACT:
A two-stroke engine has a scavenge pump provided in an intake passage, and a fuel injector provided for injecting fuel directly into a cylinder of the engine. A sensor is provided in an exhaust passge for detecting the concentration of a component of the exhaust gas, thereby detecting the actual air-fuel ratio. A desired air-fuel ratio of exhaust gas including a part of scavenging air supplied by the scavenge pump is derived from a map. The actual air-fuel ratio is compared with the desired air-fuel ratio to produce an error signal. In accordance with the error signal, the quantity of fuel injected by the fuel injector is controlled so as to cause the actual air-fuel ratio to converge to the desired air-fuel ratio.
REFERENCES:
patent: 4694803 (1987-09-01), Asakura et al.
patent: 4727845 (1988-03-01), Misumi et al.
patent: 4763629 (1988-08-01), Okazaki et al.
patent: 4773377 (1988-09-01), Watanabe et al.
patent: 4807572 (1989-02-01), Schlunke
patent: 4825837 (1989-05-01), Nakagawa
patent: 4860699 (1989-08-01), Rocklein
Farber Martin A.
Fuji Jukogyo Kabushiki Kaisha
Wolfe Willis R.
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