Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1987-11-12
1988-08-23
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Fuel injection system
123179L, F02D 4106
Patent
active
047653000
ABSTRACT:
A fuel supply control method for an internal combustion engine, including the steps of effecting after-start fuel increasing control wherein an initial value of a fuel increment is set to a value dependent upon a temperature of the engine upon generation of a predetermined control signal immediately after the start of the engine, the fuel increment is progressively decreased from the set initial value in synchronism with subsequent generation of the predetermined control signal, and a fuel quantity corrected by the progressively decreased fuel increment is supplied to the engine, and effecting air-fuel ratio feedback control, which is executed on condition that a predetermined feedback control condition is fulfilled after the start of the engine, wherein a correction coefficient is set to a value dependent upon the concentration of an ingredient in engine exhaust gases, sensed by an O.sub.2 sensor, and a fuel quantity corrected by the set correction coefficient is supplied to the engine. The initial value of the fuel increment is set to smaller values as the engine temperature is higher, and set to a predetermined lower limit if the initial value set depending upon the engine temperature is smaller than the predetermined lower limit. The feedback control is effected by correcting a fuel quantity to be supplied to the engine by the fuel increment together with the correction coefficient insofar as the predetermined feedback control condition is fulfilled, when the engine temperature is higher than a predetermined value at the start of the engine.
REFERENCES:
patent: 4582036 (1986-04-01), Kiuchi et al.
Fujimura Akira
Wazaki Yoshio
Argenbright Tony M.
Honda Giken Kogyo K.K.
Lessler Arthur L.
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