US 4,901,699 A · System for controlling a fuel injection quantity and method therefor

Abstract

A system and method for controlling a fuel injection quantity for an internal combustion engine are disclosed in which upon start of the engine acceleration, a quantity corresponding to an air quantity sucked into an engine cylinder (for example, a pressure in an intake air passage downstream of a throttle valve) is detected, an indicated mean effective pressure (P.sub.i) is detected, gains and phases of both detected values are matched with each other, respectively, so that an expected value of the indicated mean effective pressure is derived from the detected value of the air quantity corresponding quantity, a deviation between the expected value and detected value of the indicated mean effective pressure is derived, a correction quantity for a basic injection quantity at the time of an acceleration of a vehicle through the engine is derived on the basis of the deviation, and a fuel injection quantity outputted from a fuel injection valve is determined on the basis of the corrected fuel injection quantity.

Claims18

Dependent claims

A system for controlling a fuel supply for an internal combustion engine, comprising:

(a) first means for detecting engine operating conditions;
(b) second means for determining whether a request to increase an engine torque occurs from said first means;
(c) third means for calculating a basic fuel supply quantity to be supplied when the second means determines that the request of the engine torque increase occurs;
(d) fourth means for detecting from said first means a detected variable which has a close correlation to the engine power output;
(e) fifth means for calculating from said first mean an expected variable which has a close correlation to the engine power output;
(f) sixth means for matching gains and phases between said fourth means detected value and said fifth means expected value;
(g) seventh means for deriving from the sixth means a basic fuel supply correction quantity;
(h) eighth means for calculating a learning value based upon said basic fuel injection correction quantity of the seventh means;
and
(i) ninth means adding said third means basic fuel supply quantity, seventh means basic fuel supply correction quantity, and eighth means learning value and for outputting a quantity of fuel to the engine based upon the result.

7 more elements

A system for controlling a fuel injection quantity for an internal combustion engine, comprising:

(a) first means for detecting engine operating conditions;
(b) second means for determining whether an engine acceleration is carried out on the basis of said first means;
(c) third means for calculating a basic injection quantity when the second means determines that acceleration occurs;
(d) fourth means for detecting air quantity sucked into an engine cylinder;
(e) fifth means for detecting an indicated mean effective pressure of the engine cylinder;
(f) sixth means for matching gains and phases of both detected values of the air quantity and of the indicated mean effective pressure and calculating an expected value of the indicated mean effective pressure therefrom;
(g) seventh means for calculating a deviation between the expected value and detected value of the indicated mean effective pressure;
(h) eighth means for calculating a correction quantity for the basic injection quantity on the basis of the deviation calculated by the seventh means;
and
(i) ninth means for correcting the basic injection quantity on the basis of the calculated correction quantity of the eighth means to derive an output injection quantity.

7 more elements

Dependencies are inferred from the claim text.

System for controlling a fuel injection quantity and method therefor

Life of this patent

System for controlling a fuel injection quantity and method therefor

Life of this patent

Abstract

Claims18