Electronically controlling, fuel injection method for internal combustion engine
First Claim
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1. An electrically controlled, fuel injection method for an internal combustion engine, comprising the steps of:
- generating an electric fuel signal related to a desired opening-duration of a fuel injection valve during a running mode of said engine;
transmitting said fuel signal to said valve, thereby controlling an amount of fuel being supplied into combustion chambers;
generating, on the basis of one of a throttle valve opening speed and a speed of increasing flow rate of air, at least one acceleration indication each time a commanded degree of acceleration exceeds a predetermined value independent of the position of a throttle valve in an intake system of said engine prior to a generation of said acceleration indication;
increasing a fuel amount increase value R by an incremental amount r in response to each acceleration indication independent of the previous fuel amount increase value R and independent of the rotational position of said engine;
decreasing said fuel amount increase value R with lapse of time;
changing said incremental amount r as a function of engine temperature; and
increasing an amount of fuel being supplied during acceleration in the acceleration mode of the engine by altering said fuel signal by said fuel amount increase value R.
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Abstract
According to the present invention, an amount of fuel being supplied to an internal combustion engine during acceleration is controlled in association with a desired value of acceleration (a degree of acceleration) and a temperature of the engine. The amount of fuel being supplied increases, as the desired value of acceleration is increased, and as the engine temperature becomes lower. Thus, an engine output necessary for rapid acceleration is positively provided, with the assurance of a desirable driving feeling at slow acceleration.
43 Citations
18 Claims
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1. An electrically controlled, fuel injection method for an internal combustion engine, comprising the steps of:
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generating an electric fuel signal related to a desired opening-duration of a fuel injection valve during a running mode of said engine; transmitting said fuel signal to said valve, thereby controlling an amount of fuel being supplied into combustion chambers; generating, on the basis of one of a throttle valve opening speed and a speed of increasing flow rate of air, at least one acceleration indication each time a commanded degree of acceleration exceeds a predetermined value independent of the position of a throttle valve in an intake system of said engine prior to a generation of said acceleration indication; increasing a fuel amount increase value R by an incremental amount r in response to each acceleration indication independent of the previous fuel amount increase value R and independent of the rotational position of said engine; decreasing said fuel amount increase value R with lapse of time; changing said incremental amount r as a function of engine temperature; and increasing an amount of fuel being supplied during acceleration in the acceleration mode of the engine by altering said fuel signal by said fuel amount increase value R. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An electrical fuel injection control system for an internal combustion engine, said engine having at least one combustion chamber, a fuel injector controlled by a fuel injection valve for injecting fuel into said combustion chamber and a throttle valve for adjusting the amount of air supplied to said engine, comprising:
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means for generating an electric fuel signal related to a desired opening-duration of said fuel injection valve during a running mode of said engine; means for transmitting said fuel signal to said valve, thereby controlling an amount of fuel being supplied into said combustion chamber; means for generating, on the basis of one of a throttle valve opening speed and a speed of increasing flow rate of air, at least one acceleration pulse each time a commanded degree of acceleration exceeds a predetermined value independent of the position of said throttle valve prior to generation of said acceleration pulse; coordinating means for;
(1) increasing a fuel amount increase value R by an incremental amount r in response to each acceleration pulse independent of the previous fuel amount increase value R and independent of the rotational position of said engine, (2) decreasing said fuel amount increase value R with lapse of time, and (3) changing said incremental amount r as a function of engine temperature; andmeans for increasing an amount of fuel being supplied during acceleration in the acceleration mode of the engine by altering said fuel signal by said fuel amount increase value R. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification