Back to results
US 2009/0157245 A1Published application
Method for limiting motor torque in hybrid electric vehicle
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsSang Hyeon Moon, Ji Hoon Jang, Hyung Bin Ihm, Jin Hwan Jung
Life of this patent
Estimating the term…
Abstract
The present invention provides a method for limiting motor torque in a hybrid electric vehicle, which limits the output of motor torque that causes a reverse rotation of an engine in a soft hybrid electric vehicle in which a motor and the engine are directly connected to each other, thus preventing the engine from being damaged.
Claims6
A method for limiting motor torque in a hybrid electric vehicle, the method comprising:
- (a) determining whether a current mode is a motoring mode or a generating mode;
- (b) comparing a current motor speed with a regenerative torque limit starting speed predetermined according to an engine idling speed of the vehicle, if the current mode is a generating mode;
- and
- (c) limiting motor torque output using a torque command value calculated based on a maximum regenerative torque, the regenerative torque limit starting speed and the motor speed, if the motor speed exceeds 0 and does not exceed the regenerative torque limit starting speed in the generating mode.
1 more element
Dependencies are inferred from the claim text.