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US 6,550,452 B2Granted
Method of identifying the ignition stroke in the case of a single-cylinder four stroke engine
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorJuergen Schneider
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Abstract
In a method of recognizing the ignition stroke in a single-cylinder four-stroke engine, the position and the angular speed of the crankshaft are determined. The period duration is measured from the top of dead center to a defined angle of rotation of the crankshaft, and the measured period durations of two successive revolutions of the crankshaft are compared. The ignition stroke takes place during the rotation of the crankshaft having the shorter period duration.
Claims5
A method of recognizing the ignition stroke in a four-stroke engine, comprising:
- detecting position of an engine crankshaft;
- during each revolution of the crankshaft, measuring a period duration for rotation through a defined angle of rotation of the crankshaft between first and second predetermined angular positions;
- comparing measured period durations of successive revolutions of the crankshaft;
- and
- identifying the revolution having shorter measured period duration as the revolution during which the ignition stroke takes place.
2 more elements
Dependencies are inferred from the claim text.