Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1994-09-27
1997-06-17
Dolinar, Andrew M.
Internal-combustion engines
Charge forming device
Fuel injection system
F02D 4104
Patent
active
056387920
ABSTRACT:
A control system for an internal combustion engine comprises an ECU which calculates an amount of fuel to be supplied to the engine and determines a direct supply ratio and a carry-off ratio, based on operating conditions of the engine. The direct supply ratio is a ratio of a fuel amount directly drawn into the engine in a predetermined operating cycle of the engine to the whole fuel amount injected in the same operating cycle, and the carry-off ratio is a ratio of a fuel amount carried off the inner surface of the intake pipe and drawn into the engine in the predetermined operating cycle to the whole fuel amount which adhered to the inner surface of the intake pipe in an operating cycle immediately preceding the predetermined operating cycle. An adherent fuel amount which is to adhere to the intake pipe inner surface in the predetermined operating cycle is estimated based on the direct supply ratio and the carry-off ratio, and the carried-off fuel amount is estimated based on the direct supply ratio and the adherent fuel amount. The supply fuel amount is corrected based on the estimated adherent fuel amount and carried-off fuel amount, and then the corrected fuel amount is injected into the engine. The direct supply ratio and the carry-off ratio are corrected when the two ratios are in a predetermined relationship.
REFERENCES:
patent: 5086744 (1992-02-01), Ishihara et al.
patent: 5215061 (1993-06-01), Ogawa et al.
Ogawa Ken
Oshima Yoshikazu
Dolinar Andrew M.
Honda Giken Kogyo K.K.
Lessler Arthur J.
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