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

1995-08-14

1997-07-22

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123694, 123696, F02D 4114

Patent

active

056495188

ABSTRACT:
A fuel metering control system for an internal combustion engine, having a feedback loop. In the system, the quantity of fuel injection (Tim) to be supplied to the engine (plant) is determined outside of the feedback loop. A feedback correction coefficient (KSTR) is calculated using an adaptive controller and a feedback control is carried out by multiplying the quantity of fuel injection by the coefficient in the feedback control region. In view of the situation, once leaving the feedback control region due to, for example, fuel cutoff, but soon returning to the feedback control region shortly, internal variables of the adaptive controller necessary for coefficient calculation are held so as to make it unnecessary to determine the variables and to keep the control continuity and to enhance the controllability. On the other hand, if it takes a longer time to return the region, the variables are set to initial values.

REFERENCES:
patent: 4392471 (1983-07-01), Miyagi et al.
patent: 4744345 (1988-05-01), Yamato
patent: 5558076 (1996-09-01), Maki et al.
Computrol (Corona Publishing Co., Ltd.) No. 27, pp. 28-41.
Automatic Control Handbook (Ohm Publishing Co., Ltd.).
"A Survey of Model Reference Adaptive Techniques--Theory and Applications" by I.D. Landau, Automatica, vol. 10, pp. 353-379, 1974.
"Unification of Discrete Time Explicit Model Reference Adaptive Control Designs" by I.D. Landau et al, Automatica, vol. 17, No. 4, pp. 593-611, 1981.
"Combining Model Reference Adaptive Controllers and Stochastic Self-tuning Regulators'" by I.D. Landau, Automatica, vol. 18, No. 1, pp. 77-84, 1982.

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