Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Patent
1997-08-08
1999-09-14
Dombroske, George
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
73116, 731173, 123419, 123436, F02D 4500, G01M 1500
Patent
active
059516178
ABSTRACT:
An apparatus for detecting misfires in an internal combustion engine that is mounted on a vehicle. A plurality of cylinders is defined in the engine, and a piston accommodated in each cylinder to reciprocate in the cylinder. A crankshaft is connected with the piston, the crankshaft is rotated by the reciprocal movement of the piston. An engine speed sensor is provided for detecting the rotating speed of the crankshaft. An electronic control unit (ECU) computes the deviation of rotating speed of the crankshaft corresponding to each cylinder based on the detected engine speed, and the deviation is proportional to the engine load. The ECU costs a leaning value based on the computed deviation, wherein the learning value is used for detecting the misfires in the engine. A memory is provided for storing the learning value. Several sensors are provided for detecting a running condition of the engine, wherein the condition is included the engine load. The ECU renews the learning value stored in the memory based on the detected condition of the engine. The ECU determines whether the misfires occurs in each cylinder based on the difference between the deviation and the learning value. The ECU renews the learning value when the engine load is less than a predetermined value.
REFERENCES:
patent: 5297047 (1994-03-01), Matsuno
patent: 5307670 (1994-05-01), Imai et al.
patent: 5307671 (1994-05-01), Akase
patent: 5485374 (1996-01-01), Takaku et al.
patent: 5528929 (1996-06-01), Ikebuchi
patent: 5528931 (1996-06-01), James et al.
patent: 5670713 (1997-09-01), Machida et al.
patent: 5734100 (1998-03-01), Kishimoto et al.
patent: 5809969 (1998-09-01), Fiaschetti et al.
Fujita Tomohiro
Shinohara Susumu
Dombroske George
Toyota Jidosha & Kabushiki Kaisha
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