Method and device for detecting a phase of a four-stroke...

Internal-combustion engines – Charge forming device – Fuel injection system

Reexamination Certificate

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C123S644000, C123S179500

Reexamination Certificate

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06971372

ABSTRACT:
A method and a device for detecting the phase of a four-stroke gasoline engine, a gasoline direct injection engine in particular. For reliable phase detection involving relatively little expense during a starting phase, a crankshaft is turned together with at least one piston; ignition is triggered via an ignition coil in at least two successive top dead centers of the piston without a supply of fuel. A primary current or a secondary current, or a primary voltage or a secondary voltage are measured in a measuring period which extends at least over a spark duration after the ignition. From the comparison of the measuring signals of successive ignitions, a conclusion is drawn as to which of the successive top dead centers is an ignition top dead center and which is a charge cycle top dead center.

REFERENCES:
patent: 5174267 (1992-12-01), DeBiasi
patent: 5370099 (1994-12-01), Koelle et al.
patent: 6029631 (2000-02-01), Jiewertz et al.
patent: 6453733 (2002-09-01), Malaczynski et al.
patent: 6550452 (2003-04-01), Schneider
patent: 44 18 578 (1995-11-01), None
patent: 196 81 614 (1998-10-01), None
patent: 198 17 447 (1999-10-01), None
patent: 0 979 941 (2000-02-01), None
patent: 54 065223 (1979-05-01), None
Patent Abstracts of Japan, vol. 003, No. 088 (M-067), Jul. 27, 1979.

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