Method and device for detecting a phase of a four-stroke gasoline engine

US6971372B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Karl Ott · Markgröningen, DE
• Helmut Binder · Berlin, DE

Key dates

• Filing date: Dec 23, 2002
• Grant date: Dec 6, 2005
• Expiry date: Dec 23, 2022

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02P17/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

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.