Method of and system for controlling fuel injection rate in an i

Details Method of and system for controlling fuel injection rate in an i Method of and system for controlling fuel injection rate in an i

1988-02-26

1989-12-12

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Fuel injection system

123417, 123422, 123423, 123492, 123493, 123494, F02D 4132, F02D 4300

Patent

active

048860301

ABSTRACT:
A method for controlling fuel injection rate in internal combustion engine in accordance with the intake pressure and the engine speed. The method has the steps of determining the intake pressure using, as a variable, the period of time after a change in the throttle opening, and computing a basic fuel injection period on the basis of the thus computed intake pressure and the engine speed. The fuel injection is conducted by a system in accordance with this method. The system determines the intake pressure in the steady state of engine operation in accordance with the throttle opening and the fuel injection rate, effects a correction on the thus determined intake pressure so as to take into account a delay in response of the intake pressure to the transient period, and determines the basic fuel injection period on the basis of the corrected intake pressure and the engine speed. With this method and system, the fuel injection rate can be controlled in a high degree of conformity with the injection rate demanded by the engine, because the injection rate is determined on the basis of the engine speed and the actual intake pressure which can be predicted with a high degree of precision.

REFERENCES:
patent: 4172433 (1979-10-01), Bianchi et al.
patent: 4388906 (1983-06-01), Sugiyama et al.
patent: 4499881 (1985-02-01), Takao
patent: 4750352 (1988-06-01), Kolhoff
patent: 4785785 (1988-11-01), Oba et al.

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