Strategy to control a clutch to connect an engine to a powertrain of a hybrid electric vehicle
First Claim
1. A method to control a clutch to connect an engine to a powertrain of a hybrid electric vehicle (HEV), comprising 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.
3 Assignments
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Accused Products
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.
22 Citations
15 Claims
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1. A method to control a clutch to connect an engine to a powertrain of a hybrid electric vehicle (HEV), comprising the steps of:
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determining an engine run command;
determining a filtered speed error of the engine and a starter/motor; and
generating a clutch position command. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system to control a clutch to connect an engine to a powertrain of a hybrid electric vehicle comprising:
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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 said engine and said starter/motor connected to output data to said controller representing the speeds of said engine and said starter/motor; and
said controller programmed to generate a clutch position command dependent on said data to a servo-actuator connected to the clutch. - View Dependent Claims (13, 14)
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15. A hybrid electric vehicle (HEV) comprising a system to control a clutch to connect an engine to a powertrain of said HEV, said system comprising:
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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 said engine and said starter/motor connected to output data to said controller representing the speeds of said engine and said starter/motor; and
said controller programmed to generate a clutch position command dependent on said data to a servo-actuator connected to the clutch in response to said clutch position command.
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Specification