Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
116 words
A method for controlling the fuel supply of an internal combustion engine having a throttle valve in an intake air system, comprising the steps of: detecting that an angular position of a crankshaft of the engine coincides with a predetermined crankshaft angular position; detecting a pressure in an intake air passage downstream of said throttle valve whenever said coincidence is detected; setting a present deference value PBAVEn having predetermined functional relation with regard to a present detection value P BAn of said pressure in the intake air passage and a preceding reference P BAVE(n-1) , and determining an amount of fuel supply into the engine on the basis of said present reference value P BAVEn .
Claim 2
Independent Claim
116 words
A method for controlling the fuel supply of an internal combustion engine having a throttle valve in an intake air system, comprising the steps of: detecting that an angular position of a crankshaft of the engine coincides with a predetermined crankshaft angular position; detecting a pressure in an intake air passage downstream of said throttle valve whenever said coincidence is detected; setting a present deference value PBAVEn having predetermined functional relation with regard to a present detection value P BAn of said pressure in the intake air passage and a preceding reference P BAVE(n-1) , and determining an amount of fuel supply into the engine on the basis of said present reference value P BAVEn .
Claim 3
Dependent Claim
59 words
A method according to claim 1, wherein said present reference value is derived by a following equation in which, A is a constant and D REF ( 1 ≦D REF ≦ A-1) is a constant to give a degree of averaging of the detection value P BAn of said pressure in the intake air passage until the present calculation.
Claim 4
Dependent Claim
34 words
A method according to claim 2, further comprising the steps of discriminating whether the engine is being accelerated or decelerated and setting said constant D REF in accordance with the result of said discrimination.
Claim 5
Dependent Claim
90 words
A method according to claim 3, wherein said acceleration and deceleration states of the engine are discriminated depending on a subtraction value ΔP B between the present detection value P BAn of said pressure in the intake air passage and a detection value P BA(n-1) , of the constant D REF in the case where it is determined that the engine is being accelerated is set to be larger than the value of the constant D REF in the case where it is decided that the engine is being decelerated.
Claim 6
Dependent Claim
35 words
A method according to claim 1, wherein said fuel supply amount is determined depending on a subtraction value ΔP BAVE between said present detection value P BAn and said present reference value P BAVEn .
Claim 7
Dependent Claim
78 words
A method according to claim 5, wherein a check is made to see if said subtraction value ΔP BAVE is positive or negative, a constant ϕ responsive to the result of said discrimination regarding positive or negative is multiplied to the subtraction value ΔP BAVE , said present detection value P BAn is further added to the result of said multiplication, and said fuel supply amount is determined on the basis of the value of said addition result.
Claim 8
Dependent Claim
20 words
A method according claim 2, wherein said constant D REF is varied in dependence upon a temperature of the engine.