CONTROL APPARATUS OF A HYBRID VEHICLE AND METHOD FOR CONTROLLING THE SAME
First Claim
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1. A control apparatus of a hybrid vehicle comprising:
- an engine;
a motor configured to output a driving force of the vehicle and perform a start of the engine;
a first clutch installed between the engine and the motor, the first clutch configured to connect and disconnect the engine and the motor;
a second clutch installed between the motor and drive wheels, the second clutch configured to connect and disconnect the motor and the drive wheels;
a vehicle load detector configured to determine a vehicle load; and
a controller configured to control the first clutch, the second clutch, the engine, and the motor,wherein, when the vehicle load determined by the vehicle load detector is greater than or equal to a predetermined load value, the controller is configured to select a motor slip drive mode in which the first clutch is disengaged, the second clutch is slip-engaged, the engine is operating at a predetermined first revolution speed, and the motor is operating at a second revolution speed which is lower than the predetermined first revolution speed.
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Abstract
A control apparatus for a hybrid vehicle that is capable of suppressing overheating of the second clutch is taught herein. Control is switched between engine-used slip drive control and motor drive control on a basis of a vehicle load such as weight or a road incline gradient. Control methods for hybrid vehicles are also disclosed.
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Citations
20 Claims
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1. A control apparatus of a hybrid vehicle comprising:
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an engine; a motor configured to output a driving force of the vehicle and perform a start of the engine; a first clutch installed between the engine and the motor, the first clutch configured to connect and disconnect the engine and the motor; a second clutch installed between the motor and drive wheels, the second clutch configured to connect and disconnect the motor and the drive wheels; a vehicle load detector configured to determine a vehicle load; and a controller configured to control the first clutch, the second clutch, the engine, and the motor, wherein, when the vehicle load determined by the vehicle load detector is greater than or equal to a predetermined load value, the controller is configured to select a motor slip drive mode in which the first clutch is disengaged, the second clutch is slip-engaged, the engine is operating at a predetermined first revolution speed, and the motor is operating at a second revolution speed which is lower than the predetermined first revolution speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A controller for a hybrid vehicle having an engine, a motor, a first clutch installed between the engine and the motor, and a second clutch installed between the motor and drive wheels, the controller comprising:
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means for determining a vehicle load; means for controlling the engine; means for controlling the motor; means for performing a start of the engine; and means for selecting a drive mode, wherein a motor slip drive mode is selected in which the first clutch is disengaged, the second clutch is slip-engaged, the means for controlling the engine operates the engine at a predetermined first revolution speed, and the means for controlling the motor operates the motor at a second revolution speed which is lower than the predetermined first revolution speed when the vehicle load is greater than or equal to a predetermined load value; and wherein the means for selecting a drive mode selects an engine-used slip drive mode in which the first clutch is engaged, the second clutch is slip-engaged, and the engine is operating when the vehicle load is less than the predetermined load value.
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13. A control method for a hybrid vehicle including an engine, a motor configured to perform a start of the engine, a first clutch installed between the engine and the motor, a second clutch installed between the motor and drive wheels and a controller, the method comprising:
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determining a vehicle load; selecting a motor slip drive mode with the controller when the vehicle load is less than a predetermined load value, the motor slip drive mode comprising; disengaging the first clutch; slip-engaging the second clutch; operating the engine at a predetermined first revolution speed; and operating the motor at a second revolution speed which is lower than the predetermined first revolution speed; and selecting an engine-used slip drive mode with the controller when the vehicle load is less than the predetermined load value, the engine-used slip drive mode comprising; engaging the first clutch; slip-engaging the second clutch; and operating the engine. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification