US5239965A — Fuel injection control apparatus for internal com…

Claim 1

Independent Claim 154 words

A fuel injection control apparatus for an internal combustion engine, said apparatus comprising: detection means for detecting whether or not the internal combustion engine is operating in prescribed high load conditions; fuel injection control means for increasing a fuel injection time during which an amount of fuel proportional to the fuel injection time is supplied to the engine; delaying means for delaying increase of the fuel injection time by said fuel injection control means until a delay time has elapsed since high load conditions were detected by said detection means; heat condition measuring means for measuring a heat condition of exhaust parts of said engine prior to said detection of said high load conditions; and delay time control means for varying said delay time of said delaying means in response to the measured heat condition of the exhaust parts supplied by said heat condition measuring means during said high load conditions of said engine.

Claim 2

Dependent Claim 154 words

A fuel injection control apparatus for an internal combustion engine, said apparatus comprising: detection means for detecting whether or not the internal combustion engine is operating in prescribed high load conditions; fuel injection control means for increasing a fuel injection time during which an amount of fuel proportional to the fuel injection time is supplied to the engine; delaying means for delaying increase of the fuel injection time by said fuel injection control means until a delay time has elapsed since high load conditions were detected by said detection means; heat condition measuring means for measuring a heat condition of exhaust parts of said engine prior to said detection of said high load conditions; and delay time control means for varying said delay time of said delaying means in response to the measured heat condition of the exhaust parts supplied by said heat condition measuring means during said high load conditions of said engine.

Claim 3

Dependent Claim 41 words

An apparatus according to claim 1, wherein said heat condition measuring means increments a first delay count value when said high load conditions of said engine are detected by said detection means, thereby measuring said heat condition of said exhaust parts.

Claim 4

Dependent Claim 96 words

An apparatus according to claim 2, wherein said delay time control means enables said fuel injection control means to immediately increase the fuel injection time when said first delay count value is greater than a prescribed time period value, said time period value being preset in accordance with an intake air flow rate, and said delay time control means preventing said fuel injection control means from increasing the fuel injection time when the said first delay count value is not greater than a prescribed time period value, thereby varying said delay time of said delaying means.

Claim 5

Dependent Claim 63 words

An apparatus according to claim 1, wherein said heat condition measuring means measures said heat condition of said exhaust parts by incrementing a first delay count value when an intake vacuum pressure higher than a prescribed high-load reference value is detected, said high-load reference value being preset in accordance with a detected engine speed value detected by a sensor provided in the engine.

Claim 6

Dependent Claim 95 words

An apparatus according to claim 4, wherein said delay time control means enables said fuel injection control means to immediately increase the fuel injection time when said first delay count value is greater than a prescribed time period value, said time period value being preset in accordance with an intake air flow rate, and said delay time control means preventing said fuel injection control means from increasing the fuel injection time when said first delay count value is not greater than a prescribed time period value, thereby varying said delay time of said delaying means.

Claim 7

Dependent Claim 75 words

An apparatus according to claim 1, further comprising memory means for storing high-load reference values of intake vacuum pressure, said high-load reference values being preset in accordance with engine speed values, and said detection means detecting said high load conditions of said engine by determining whether or not a detected intake vacuum pressure is higher than a prescribed high-load reference value read out from said memory means in response to a detected engine speed value.

Claim 8

Dependent Claim 44 words

An apparatus according to claim 1, wherein said heat condition measuring means increments a second delay count value when an intake vacuum pressure lower than a prescribed low-load reference value is detected by a vacuum sensor mounted in an intake pipe of the engine.

Claim 9

Dependent Claim 39 words

An apparatus according to claim 7, wherein said heat condition measuring means resets the first delay count value to zero when it is detected that said second delay count value is greater than a prescribed time period count value.

Claim 10

Dependent Claim 75 words

An apparatus according to claim 1, further comprising memory means for storing low-load reference values of intake vacuum pressure, said low-load reference values being preset in accordance with engine speed values, and said heat condition measuring means incrementing a second delay count value when it is detected that a detected intake vacuum pressure is lower than a prescribed low-load reference value read out from said memory means in response to a detected engine speed value.

Claim 11

Dependent Claim 77 words

An apparatus according to claim 1, wherein said detection means detects whether or not a detected intake vacuum pressure value detected by a vacuum sensor mounted in an intake pipe of the engine, is higher than a prescribed high-load reference value read out from stored map data in respect to a detected engine speed value detected by a sensor provided in the engine, thereby detecting whether or not said engine is operating in said high load conditions.

Claim 12

Dependent Claim 77 words

An apparatus according to claim 1, wherein said heat condition measuring means decrements a first delay count value when an intake vacuum pressure lower than a prescribed high-load reference value is detected, said high-load reference value being present in accordance with a detected engine speed value detected by a sensor provided in the engine, and values of said decrement which is subtracted from the first delay count value, varying in accordance with an intake air flow rate.

Claim 13

Dependent Claim 164 words

A fuel injection control apparatus for an internal combustion engine, the apparatus comprising: detection means for detecting whether or not the internal combustion engine is operating in prescribed high load conditions; fuel injection control means for increasing a fuel injection time during which an amount of fuel proportional to the fuel injection time is supplied to the engine; delaying means for delaying increase of the fuel injection time by the fuel injection control means until a delay time has elapsed since high load conditions were detected by the detection means; heat condition measuring means for measuring a heat condition of exhaust parts of the engine prior to the detection of the high load conditions; and delay time control means for gradually varying the delay time of the delaying means between a predetermined first value and a predetermined second value based on the measured heat condition of the exhaust parts supplied by the heat condition measuring means during the high load conditions of the engine.

Claim 14

Dependent Claim 164 words

A fuel injection control apparatus for an internal combustion engine, the apparatus comprising: detection means for detecting whether or not the internal combustion engine is operating in prescribed high load conditions; fuel injection control means for increasing a fuel injection time during which an amount of fuel proportional to the fuel injection time is supplied to the engine; delaying means for delaying increase of the fuel injection time by the fuel injection control means until a delay time has elapsed since high load conditions were detected by the detection means; heat condition measuring means for measuring a heat condition of exhaust parts of the engine prior to the detection of the high load conditions; and delay time control means for gradually varying the delay time of the delaying means between a predetermined first value and a predetermined second value based on the measured heat condition of the exhaust parts supplied by the heat condition measuring means during the high load conditions of the engine.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1996-08-30	1997-03-01	1997-08-31	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2000-08-30	2001-03-01	2001-08-31	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2004-08-30	2005-03-01	2005-08-31	$7700.00	Window Closed / Lapsed

Fuel injection control apparatus for internal combustion engine

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