Internal-combustion engines – Charge forming device – Including means responsive to instantaneous change in engine...
Patent
1989-04-12
1991-04-30
Dolinar, Andrew M.
Internal-combustion engines
Charge forming device
Including means responsive to instantaneous change in engine...
123341, 123352, F02D 4114
Patent
active
050108662
ABSTRACT:
A nonlinear feedback control method and apparatus for an internal combustion engine in which a model of the engine is formulated, and load torque is estimated as a variable representing the operating state of the engine. Deviations of the engine from the engine model are formulated as disturbances. Other variables which cannot be measured are determined by making experiments and using tables. Based on the estimated load torque, the formulated deviations and other formulated variables, precise feedback control is executed for the engine, which varies in its operating conditions so that the rotation speed of the engine is adjusted to a target rotation speed by controlling a throttle opening. The estimated load torque is a physically significant control quantity which is easy to manipulate, and which can also be used for various controls such as an ignition timing control and a fuel injection control.
REFERENCES:
patent: 4509477 (1985-04-01), Takao et al.
patent: 4638778 (1987-01-01), Kamei et al.
patent: 4785780 (1988-11-01), Kawai
patent: 4860707 (1989-08-01), Ohata
Dolinar Andrew M.
Toyota Jidosha & Kabushiki Kaisha
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