Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2005-12-06
2005-12-06
Huynh, Hai (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S644000, C123S179500
Reexamination Certificate
active
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.
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Binder Helmut
Ott Karl
Huynh Hai
Robert & Bosch GmbH
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