Internal-combustion engines – Spark ignition timing control – Electronic control
Reexamination Certificate
2000-12-22
2003-07-01
Kwon, John (Department: 3754)
Internal-combustion engines
Spark ignition timing control
Electronic control
C123S406260
Reexamination Certificate
active
06584955
ABSTRACT:
TECHNICAL OBJECTIVE
FIELD OF THE INVENTION
The present invention concerns internal combustion engines that are controlled in open and closed loop by an ECU (electronic control unt), and if the injectors for engines are controlled electrically by the ECU, then it is necessary to determine the phase angle when starting the internal combustion engine. Phase detection for a four-stroke Otto spark ignition engine indicates whether the piston is in the compression cycle or in the exhaust cycle during the upward movement.
BACKGROUND INFORMATION
In known systems, this is achieved, for example, by an additional transmitter wheel on the camshaft, or by discharge (outflow) detection.
SUMMARY OF THE INVENTION
An exemplary method of the present invention is directed to a method used for detecting phase with the aid of an ionic-current measuring circuit.
REFERENCES:
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patent: 5425339 (1995-06-01), Fukui
patent: 5945828 (1999-08-01), Katogi et al.
patent: 5970952 (1999-10-01), Mogi et al.
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patent: 933 525 (1999-08-01), None
Foerster Juergen
Guenther Achim
Ketterer Markus
Wald Klaus-Juergen
Kenyon & Kenyon
Kwon John
Robert & Bosch GmbH
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