Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
218 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 as in coincidence with a predetermined crankshaft angular position; detecting, at each detection of said coincidence, a pressure in an intake air passage downstream of said throttle valve and an engine rotating speed of the engine or a value in inverse proportion to said engine rotating speed on the basis of an interval between the detections of said predetermined crankshaft angular position; determining a basic amount of fuel which is to be supplied to the engine in accordance with a presently detected value P BAn of said pressure in said intake air passage; setting a present reference value M eAVEn having a predetermined functional relationship to a presently detected value M en of said engine rotating speed or said value in inverse proportion thereof and to a reference value M eAVE (n-1) set one sampling before; determining a correction fuel supply amount on the basis of said present reference value M eAVEn ; adding said correction fuel supply amount to said basic fuel supply amount; and supplying an injection amount of fuel commensurate with the result of said addition to the engine.
Claim 2
Independent Claim
218 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 as in coincidence with a predetermined crankshaft angular position; detecting, at each detection of said coincidence, a pressure in an intake air passage downstream of said throttle valve and an engine rotating speed of the engine or a value in inverse proportion to said engine rotating speed on the basis of an interval between the detections of said predetermined crankshaft angular position; determining a basic amount of fuel which is to be supplied to the engine in accordance with a presently detected value P BAn of said pressure in said intake air passage; setting a present reference value M eAVEn having a predetermined functional relationship to a presently detected value M en of said engine rotating speed or said value in inverse proportion thereof and to a reference value M eAVE (n-1) set one sampling before; determining a correction fuel supply amount on the basis of said present reference value M eAVEn ; adding said correction fuel supply amount to said basic fuel supply amount; and supplying an injection amount of fuel commensurate with the result of said addition to the engine.
Claim 3
Dependent Claim
64 words
A method according to claim 1, wherein said present reference value M eAVEn is obtained from a following equation M.sub.eAVEn =(M.sub.REF /A)M.sub.en +{(A-M.sub.REF)/A}M.sub.eAVE(n-1) in which, A is a constant and M REF (1≦M REF ≦A-1) is a constant for averaging of the presently detected value M en of said engine rotating speed or of said value in inverse proportion to said engine rotating speed.
Claim 4
Dependent Claim
39 words
A method according to claim 1, wherein said correction fuel supply amount is determined by a subtraction value ΔM eAVE , being the difference between said presently detected value M en and said present reference value M eAVEn .
Claim 5
Dependent Claim
50 words
A method according to claim 3, further comprising the steps of determining whether said subtraction value ΔM eAVE is positive or negative, and multiplying a constant α, which differs depending on the result of said determination by said subtraction value ΔM eAVE , thereby determining said correction fuel supply amount.
Claim 6
Dependent Claim
56 words
A method according to claim 1, wherein when said correction fuel supply amount exceeds an upper limit value, the correction fuel supply amount is set to said upper limit value, and when the correction fuel supply amount becomes smaller than a lower limit value, the correction fuel supply amount is set to said lower limit value.