System for controlling a fuel injection quantity and method ther

Details System for controlling a fuel injection quantity and method ther System for controlling a fuel injection quantity and method ther

1988-07-07

1990-02-20

Neill, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

123425, F02D 514

Patent

active

049016997

ABSTRACT:
A system and method for controlling a fuel injection quantity for an internal combustion engine are disclosed in which upon start of the engine acceleration, a quantity corresponding to an air quantity sucked into an engine cylinder (for example, a pressure in an intake air passage downstream of a throttle valve) is detected, an indicated mean effective pressure (P.sub.i) is detected, gains and phases of both detected values are matched with each other, respectively, so that an expected value of the indicated mean effective pressure is derived from the detected value of the air quantity corresponding quantity, a deviation between the expected value and detected value of the indicated mean effective pressure is derived, a correction quantity for a basic injection quantity at the time of an acceleration of a vehicle through the engine is derived on the basis of the deviation, and a fuel injection quantity outputted from a fuel injection valve is determined on the basis of the corrected fuel injection quantity.

REFERENCES:
patent: 4342230 (1982-08-01), Okamura et al.
patent: 4571683 (1986-02-01), Kobayashi et al.
patent: 4628883 (1986-12-01), Kataoka
patent: 4640249 (1987-02-01), Kawamura et al.
patent: 4660535 (1987-04-01), Asano
patent: 4705001 (1987-11-01), Danno et al.
patent: 4751909 (1988-06-01), Otoba
patent: 4753206 (1988-06-01), Inoue et al.
patent: 4768486 (1988-09-01), Koika et al.

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