Electronic fuel injection control system for internal combustion

Details Electronic fuel injection control system for internal combustion Electronic fuel injection control system for internal combustion

1984-12-10

1986-03-11

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

123487, 123486, 123480, F02D 4100

Patent

active

045747610

ABSTRACT:
In an electronic fuel injection control system for an internal combustion engine, a first integration circuit is responsive to an angular signal with a time period in inverse proportion to the rotational speed of the engine for integrating the first half of the time period of the angular signal and for producing a first integration signal indicative of a resultant value of the integration, a hold circuit is arranged to hold the value of the first integration signal upon lapse of the first half of the time period and to produce a hold signal of the held value and maintain it for the second half of the time period and the first half of the time period of the following angular signal, a second integration circuit is responsive to the angular signal for integrating the value of an air quantity signal indicative of the quantity of air drawn into the engine at each start of the first and second halves of the time period and for producing a second integration signal indicative of a resultant value of the integration of the value of the air quantity signal, and a signal generator is arranged to determine a fuel injection time based on the time required for arrival of the valve of the second integration signal to the level of the hold signal after each start of the first and second halves of the time period.

REFERENCES:
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patent: 4309759 (1982-01-01), Tokuda et al.
patent: 4359992 (1982-11-01), Asano et al.
patent: 4380800 (1983-04-01), Wilkenson
patent: 4450814 (1984-05-01), Sawamoto et al.
patent: 4478190 (1984-10-01), Kawai
patent: 4480620 (1984-11-01), Tonge et al.
patent: 4492203 (1985-01-01), Yutaka
patent: 4495921 (1985-01-01), Sawamoto

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