Fuel injection controller of engine
First Claim
1. A fuel control apparatus for controlling fuel injection of an engine having a plurality of cylinders, comprising:
- basic fuel calculation means for calculating a basic amount of fuel to be injected to respective cylinders of an engine in accordance with an engine running condition;
adjustment deciding means for deciding a total amount of adjustment to be ultimately applied to the basic amount of fuel on the basis of an engine revolution speed deviation between the respective cylinders;
adjustment necessity determination means for determining whether the adjustment is needed to the basic fuel on the basis of the engine running condition; and
final fuel deciding means for deciding a total amount of fuel to be injected into the respective cylinders on the basis of the basic amount of fuel and a stepwise adjustment, which increases stepwise to or decreases stepwise from the total amount of adjustment, when the adjustment necessity determination means changes its determination.
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Accused Products
Abstract
A fuel injection control device of an engine having a plurality of cylinders, that prevents sudden change in combustion condition. The control device calculates a basic amount of fuel to be injected into cylinders. The controller then decides an amount of adjustment ultimately made to the basic amount of fuel based on an engine revolution speed difference between the cylinders. The adjustment is stepwise made to the basic amount of fuel so that a total amount of fuel gradually increases or decreases. Since a steep change does not occur in the total amount of fuel, the combustion condition does not change suddenly and the engine does not vibrate.
13 Citations
20 Claims
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1. A fuel control apparatus for controlling fuel injection of an engine having a plurality of cylinders, comprising:
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basic fuel calculation means for calculating a basic amount of fuel to be injected to respective cylinders of an engine in accordance with an engine running condition;
adjustment deciding means for deciding a total amount of adjustment to be ultimately applied to the basic amount of fuel on the basis of an engine revolution speed deviation between the respective cylinders;
adjustment necessity determination means for determining whether the adjustment is needed to the basic fuel on the basis of the engine running condition; and
final fuel deciding means for deciding a total amount of fuel to be injected into the respective cylinders on the basis of the basic amount of fuel and a stepwise adjustment, which increases stepwise to or decreases stepwise from the total amount of adjustment, when the adjustment necessity determination means changes its determination. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
an engine;
wheels;
a vehicle body; and
a fuel injection control apparatus according to claim 10.
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12. A fuel control method for controlling fuel injection in an engine having a plurality of cylinders, comprising the steps of:
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A) calculating a basic amount of fuel to be injected to respective cylinders of an engine in accordance with an engine running condition;
B) deciding a total amount of adjustment to be ultimately applied to the basic amount of fuel on the basis of an engine revolution speed deviation between the respective cylinders;
C) determining whether or not the adjustment is needed to the basic fuel on the basis of the engine running condition; and
D) deciding a total amount of fuel to be injected into the respective cylinders on the basis of the basic amount of fuel and a stepwise adjustment, which increases stepwise to or decreases stepwise from the total amount of adjustment, when the step D changes its determination. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification