Method of controlling hybrid vehicle
AssigneesKia Motors Corporation, Hyundai Motor Company
InventorsDokyung Yim, Joungchul Kim
Life of this patent
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Abstract
A method of controlling a hybrid vehicle including an automatic transmission and a motor generator comprises a pre-gearshift control, a mid-gearshift control, and a post-gearshift control. It is possible to prevent abnormal operations and damage of an automatic transmission due to reverse rotation of the input shaft of the automatic transmission and achieve smooth and stable pre-stop gearshift, by appropriately controlling reverse torque exerted in the input shaft of the automatic transmission, when a vehicle equipped with a hybrid driving apparatus including the automatic transmission performs the pre-stop gearshift.
Claims9
A method of controlling a hybrid vehicle including an auto transmission and a motor generator, comprising:
- a step of pre-gearshift control that reduces reverse torque of the motor generator to the level of a first step, when a pre-stop gearshift order is generated in regenerative braking, between a point of time where the gearshift order is generated and a point of time where the actual gearshift is started;
- a step of mid-gearshift control that reduces the reverse torque of the motor generator to the level of a second step, which is smaller than the level of the first step, from a point of time where the actual gearshift starts to be performed by the gearshift order to a point of time where engaging components of the automatic transmission are completely interlocked;
- and
- a step of post-gearshift control that increases the reverse torque of the motor generator after the interlocking is finished.
A method of controlling a hybrid vehicle, comprising:
- a step of engine stop that stops engine when a driver releases an acceleration pedal;
- a step of regenerative braking that makes a brake and a motor generator separately provide desired braking force is performed when the driver presses down a brake pedal after the step of engine stop;
- a step of pre-gearshift control that reduces reverse torque of a motor generator to the level of a first step, when a pre-stop gearshift order is generated during the step of regenerative braking;
- a step of mid-gearshift control that reduces the reverse torque of the motor generator to the lever of a second step smaller than the level of the first step, after the step of pre-gearshift control;
- a step of post-gearshift control that increases the reverse torque of the motor generator after the step of mid-gearshift control.
Dependencies are inferred from the claim text.