Fuel metering control system for internal combustion engine

Details Fuel metering control system for internal combustion engine Fuel metering control system for internal combustion engine

1996-02-23

1998-07-28

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123690, 123696, F02D 4114

Patent

active

057850372

ABSTRACT:
A system for controlling fuel metering for an internal combustion engine having a feedback system which has a controller for calculating a feedback correction coefficient, using an adaptive control law to correct a quantity of fuel injection such that a detected air/fuel ratio is brought to a desired air/fuel ratio. In the system, it is discriminated whether the feedback correction coefficient and the detected air/fuel ratio are in phase, and the feedback system is instable when they are discriminated to be in phase. Since the coefficient acts to correct the deviation of the detected air/fuel ratio from the desired air/fuel ratio, they are normally in antiphase. It is thus possible to find the system instable, by discriminating whether they are in phase or not.

REFERENCES:
patent: 5445136 (1995-08-01), Yamashita et al.
"Digital Adaptive Control" Computrol, No. 27, Jul. 10, 1989, pp. 28-41.
"Automatic Control Handbook", Ohm, Ltd., Japan, pp. 701-707, Oct. 30, 1983.
"A Survey of Model Reference Adaptive Techniques--Theory and Applications", Landau, Automatica, vol. 10, 1974, pp. 353-379.
"Unification of Discrete Time Explicit Model Reference Adaptive Control Designs", Landau et al, Automatica, vol. 17, No. 4, 1981, pp. 593-611.
"Combining Model Reference Adaptive Controllers and Stochastic Self-tuning Regulators", Landau, Automatica, vol. 18, No. 1, 1982, pp. 77-84.

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