Vehicle with clutch for transmission of torque output of motor
First Claim
1. In a vehicle:
- a motor;
a wet clutch for transmission of torque output of the motor to road wheels of the vehicle and transmission of road load from the road wheels to the motor, the wet clutch being disengaged in response to a clutch disengagement control signal; and
a controller, the controller determining that the wet clutch be disengaged when a parameter indicative of the actual vehicle speed has a predetermined relationship with threshold, the controller generating the clutch disengagement control signal upon determining that the wet clutch be disengaged, and the controller, accounting for clutch drag state of the wet clutch, altering the threshold.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle comprises a motor (4) and a wet clutch (12) for transmission of torque output of the motor to road wheels of the vehicle and transmission of road load from the road wheels to the motor (4). The wet clutch is disengaged in response to a clutch disengagement control signal Accounting for clutch drag state of the wet clutch, a controller (8) selects one out of various values as threshold (Voff). The controller (8) determines that the wet clutch be disengaged when a parameter indicative of the actual vehicle speed has a predetermined relationship with the threshold. The controller (20) generates the clutch disengagement control signal upon determining that the wet clutch be disengaged.
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Citations
44 Claims
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1. In a vehicle:
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a motor;
a wet clutch for transmission of torque output of the motor to road wheels of the vehicle and transmission of road load from the road wheels to the motor, the wet clutch being disengaged in response to a clutch disengagement control signal; and
a controller, the controller determining that the wet clutch be disengaged when a parameter indicative of the actual vehicle speed has a predetermined relationship with threshold, the controller generating the clutch disengagement control signal upon determining that the wet clutch be disengaged, and the controller, accounting for clutch drag state of the wet clutch, altering the threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 25, 26, 27, 28, 29, 30, 31, 32)
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13. A method for providing extended operating range of a motor of a vehicle as well as providing protection to the motor, the vehicle including a wet clutch for transmission of torque output of the motor to road wheels of the vehicle and transmission of load from the road wheels to the motor, the wet clutch being disengaged in response to a clutch disengagement control signal, the method comprising:
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determining that the wet clutch be disengaged when a parameter indicative of the actual vehicle speed has a predetermined relationship with threshold;
generating the clutch disengagement control signal upon determining that the wet clutch be disengaged; and
altering, accounting for clutch drag state of the wet clutch, the threshold.
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14. A method for providing extended operating range of a motor of a vehicle as well as providing protection to the motor, the vehicle including a wet clutch for transmission of torque output of the motor to road wheels of the vehicle and transmission of load from the road wheels to the motor, the wet clutch being disengaged in response to a clutch disengagement control signal, the method comprising:
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predicting a local temperature in the proximity of clutch plates of the wet clutch;
determining an overall temperature of the wet clutch;
determining, based on the local temperature and the overall temperature, a clutch operating temperature;
selecting one out of various values as threshold when the clutch operating temperature is higher than or equal to a first predetermined temperature value;
selecting another out of the various values as the threshold when the clutch operating temperature is lower than a second predetermined temperature value;
determining that the wet clutch be disengaged when a parameter indicative of the actual vehicle speed has a predetermined relationship with the threshold; and
generating the clutch disengagement control signal upon determining that the wet clutch be disengaged. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An apparatus for providing extended operating range of a motor of a vehicle as well as providing protection to the motor, the vehicle including a wet clutch for transmission of torque output of the motor to road wheels of the vehicle and transmission of load from the road wheels to the motor, the wet clutch being disengaged in response to a clutch disengagement control signal, the apparatus comprising:
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means for determining that the wet clutch be disengaged when a parameter indicative of the actual vehicle speed has a predetermined relationship with threshold;
means for generating the clutch disengagement control signal upon determining that the wet clutch be disengaged; and
means for altering, accounting for clutch drag state of the wet clutch, the threshold.
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33. In a vehicle:
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a motor;
a wet clutch for transmission of torque output of the motor to road wheels of the vehicle and transmission of road load from the road wheels to the motor, the wet clutch being disengaged in response to a clutch disengagement control signal; and
a controller, the controller determining that the wet clutch be disengaged when a parameter indicative of the actual vehicle speed has a predetermined relationship with threshold, the controller generating the clutch disengagement control signal upon determining that the wet clutch be disengaged the controller accounting for clutch drag state of the wet clutch, and the controller, in response to the clutch drag state accounted for, altering the threshold. - View Dependent Claims (34, 35, 36)
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37. A method for providing extended operating range of a motor of a vehicle as well as providing protection to the motor, the vehicle including a wet clutch for transmission of torque output of the motor to road wheels of the vehicle and transmission of load from the road wheels to the motor, the wet clutch being disengaged in response to a clutch disengagement control signal, the method comprising:
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determining that the wet clutch be disengaged when a parameter indicative of the actual vehicle speed has a predetermined relationship with threshold;
generating the clutch disengagement control signal upon determining that the wet clutch be disengaged;
accounting for clutch drag state of the wet clutch; and
altering the threshold in response to the clutch drag state accounted for.
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38. A method for providing extended operating range of a motor of a vehicle as well as providing protection to the motor, the vehicle including a wet clutch for transmission of torque output of the motor to road wheels of the vehicle and transmission of load from the road wheels to the motor, the wet clutch being disengaged in response to a clutch disengagement control signal, the method comprising:
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accounting for a progress in a physical quantity that increases from an initial value immediately after activation of the vehicle;
altering, in response to the progress accounted for, a value of a parameter indicative of the physical quantity;
selecting, in response to the parameter, one out of various values as threshold;
determining that the wet clutch be disengaged when a parameter indicative of the actual vehicle speed has a predetermined relationship with the threshold; and
generating the clutch disengagement control signal upon determining that the wet clutch be disengaged. - View Dependent Claims (39, 40, 41, 42)
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43. A vehicle comprising:
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a first set of road wheels;
a second set of road wheels;
a prime mover drivingly coupled to the first set of road wheels;
a source of electric power;
a motor selectively connected to the source of electric power to produce torque output;
a wet clutch between the motor and the second set of road wheels for transmission of torque output of the motor to the second set of road wheels and transmission of road load from the second set of road wheels to the motor, the wet clutch being disengaged in response to a clutch disengaged control signal; and
a controller, the controller, accounting for clutch drag state of the wet clutch, selecting one out of various values as threshold, the controller determining that the wet clutch be disengaged when a parameter indicative of the actual vehicle speed has a predetermined relationship with the threshold, the controller generating the clutch disengagement control signal upon determining that the wet clutch be disengaged. - View Dependent Claims (44)
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Specification