Method for controlling fuel supply to an internal combustion eng

Internal-combustion engines – Charge forming device – Fuel injection system

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Details

123399, 123643, F02B 304, F02D 502, F02D 500, F02D 3500

Patent

active

045151300

ABSTRACT:
A fuel supply control method for controlling the fuel supply to an internal combustion engine at deceleration, wherein the valve opening of a throttle valve of the engine is detected while the throttle valve is being closed and each time each pulse of a predetermined sampling signal is generated, a variation in the same valve opening occurring between adjacent pulses of the sampling signal is determined as a control parameter value, and the quantity of fuel being supplied to the engine is reduced by an amount corresponding to the control parameter value. Preferably, the above fuel supply decrement value is determined in the following manner: (1) when the control parameter value obtained at the time of generation of a present pulse of the sampling signal is smaller than a predetermined negative value and at the same time is smaller than the control parameter value obtained at the time of generation of the preceding pulse of the sampling signal, the above fuel supply decrement value is set to a value corresponding to the above control parameter value corresponding to the present pulse; and (2) when the control parameter value at the present pulse of the sampling signal becomes larger than the control parameter value at the preceding pulse of the sampling signal while it is smaller than the aforementioned predetermined negative value, the initial value of the fuel supply decrement value is set to a value corresponding to the control parameter value obtained at the time of a pulse of the sampling signal occurring immediately after the control parameter value at the present pulse has exceeded the control parameter value at the preceding pulse, and thereafter the initial value is gradually reduced.

REFERENCES:
patent: 3483851 (1969-12-01), Reichardt
patent: 4327082 (1982-05-01), Harada
patent: 4359993 (1982-11-01), Carlson
patent: 4385596 (1983-05-01), Hosaka
patent: 4387687 (1983-06-01), Hoppel
patent: 4391250 (1983-07-01), Matsui
patent: 4402295 (1983-09-01), Ono
patent: 4424568 (1984-01-01), Nishimura et al.
patent: 4428349 (1984-01-01), Snow

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