Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Patent
1992-11-12
1995-01-03
Dolinar, Andrew M.
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
123692, F02D 4114
Patent
active
053776542
ABSTRACT:
A control apparatus and method for maintaining equal air flow among cylinders and independently controlling the air/fuel ratio of each individual cylinder, in an internal combustion engine having variable valve control. An air fuel controller generates valve control signals for each individual cylinder by sampling the exhaust gas oxygen sensor, and correlating the samples with corresponding combustion events. The valve lift for each variable lift valve is corrected to operate each cylinder at the desired air flow and air/fuel ratio. The variable valve lift can be accomplished in a camshaft type system incorporating a lost motion mechanism or similar device, or a system incorporating direct electrohydraulic or electromechanical valve actuation without a camshaft. The system and method can provide further flexibility in cylinder to cylinder air/fuel ratio control by combining it with a variable pulse width electronic fuel injector capability.
REFERENCES:
patent: 4000756 (1977-01-01), Ule et al.
patent: 4009695 (1977-03-01), Ule
patent: 4206728 (1980-06-01), Trenne
patent: 4615306 (1986-10-01), Wakeman
patent: 4674451 (1987-06-01), Rembold et al.
patent: 4696265 (1987-09-01), Nohira
patent: 4716863 (1988-01-01), Pruzan
patent: 4796573 (1989-01-01), Wakeman et al.
patent: 4930465 (1990-06-01), Wakeman et al.
patent: 4962741 (1990-10-01), Cook et al.
patent: 4974566 (1990-12-01), LoRusso et al.
patent: 5115782 (1992-05-01), Klinke et al.
"Valve Timing For Control Of Oxides Of Nitrogen (NO.sub.x)", Max A. Freeman, et al, SAE Publication No. 720121, Jan. 10-14, 1972.
Cook Jeffrey A.
Grizzle Jessy W.
LoRusso Julian A.
Szpak Peter S.
Dolinar Andrew M.
Ford Motor Company
Lippa Allan J.
May Roger L.
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