CONTROL METHOD FOR CLUTCH OF HYBRID ELECTRIC VEHICLE
First Claim
1. A control method for a clutch of a hybrid electric vehicle including a series and parallel type of hybrid transmission, comprising:
- determining whether the hybrid electric vehicle is operating as the parallel type;
determining a hydraulic pressure of the clutch according to a demand torque of a driver when the hybrid electric vehicle is operating as the parallel type;
determining a target value of torque blending which blends a front side torque of the clutch with a motor torque and performing the torque blending;
increasing the target value of the torque blending until a clutch slip is generated;
stopping the torque blending when the clutch slip is generated; and
learning a hydraulic pressure of the clutch corresponding to the front side torque of the clutch at a time when the clutch slip is generated.
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Abstract
A control method for a clutch of a hybrid electric vehicle including a series and parallel type of hybrid transmission, may include determining whether the hybrid electric vehicle may be operating as the parallel type, determining a hydraulic pressure of the clutch according to a demand torque of a driver when the hybrid electric vehicle may be operating as the parallel type, determining a target value of torque blending which blends a front side torque of the clutch with a motor torque and performing the torque blending, increasing the target value of the torque blending until a clutch slip may be generated, stopping the torque blending when the clutch slip may be generated, and learning a hydraulic pressure of the clutch corresponding to the front side torque of the clutch at a time when the clutch slip may be generated.
23 Citations
9 Claims
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1. A control method for a clutch of a hybrid electric vehicle including a series and parallel type of hybrid transmission, comprising:
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determining whether the hybrid electric vehicle is operating as the parallel type; determining a hydraulic pressure of the clutch according to a demand torque of a driver when the hybrid electric vehicle is operating as the parallel type; determining a target value of torque blending which blends a front side torque of the clutch with a motor torque and performing the torque blending; increasing the target value of the torque blending until a clutch slip is generated; stopping the torque blending when the clutch slip is generated; and learning a hydraulic pressure of the clutch corresponding to the front side torque of the clutch at a time when the clutch slip is generated. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A control method for a clutch of a hybrid electric vehicle including a series and parallel type of hybrid transmission, comprising:
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determining whether the hybrid electric vehicle is operating as the parallel type; comparing a front side torque of the clutch with an available transfer torque of the clutch when the hybrid electric vehicle is operating as the parallel type; determining a hydraulic pressure of the clutch corresponding to the front side torque of the clutch when the front side torque of the clutch is greater than the available transfer torque of the clutch, and applying the determined hydraulic pressure of the clutch; and performing a torque blending when the determined hydraulic pressure of the clutch is applied. - View Dependent Claims (9)
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Specification