Strategy to control a clutch to connect an engine to a powertrain of a hybrid electric vehicle
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United States of America Patent
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Feb 8, 2005
Grant Date -
Mar 11, 2004
app pub date -
Sep 9, 2002
filing date -
Sep 9, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
This invention is a control system for a clutch for connecting an engine to the powertrain of an HEV. The system includes a controller programmed to determine a filtered speed error of the engine and a starter/motor and to determine an engine run command. Monitoring devices operatively connected to the engine and the starter/motor are connected to output data representing the engine and starter/motor speeds to the controller. The controller is programmed to generate a clutch position command, dependent on the data, to a servo-actuator connected to the clutch. The invention, further, provides methods for controlling such a clutch including the steps of determining an engine run command, determining a filtered speed error of the engine and a starter/motor and generating a clutch position command.
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