CONTROL APPARATUS AND METHOD FOR HYBRID VEHICLE
First Claim
1. A control apparatus for a hybrid vehicle, comprising:
- an engine;
a motor-generator;
a first engagement element disposed between the engine and the motor-generator;
a second engagement element disposed between the motor-generator and a drive wheel;
a temperature detector operable to detect a temperature of the second engagement element; and
a controller operable to;
selectively provide one of a first drive mode in which the first engagement element is disengaged and the second engagement element is engaged to drive the vehicle only using the motor-generator, a second drive mode in which the first and second engagement elements are engaged to drive the vehicle using both the engine and the motor-generator and a third drive mode in which the first engagement element is engaged and the second engagement element is in slip-engagement to drive the vehicle using both the engine and the motor-generator; and
select the first drive mode when the temperature of the second engagement element is higher than or equal to a predetermined temperature value during a low-speed driving period below a predetermined vehicle speed.
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Accused Products
Abstract
A control apparatus and method for a hybrid vehicle having a first engagement element between an engine and a motor-generator and a second engagement element between the motor-generator and a drive wheel. During EV drive mode, the first engagement element disengages and the second engagement element engages to drive the vehicle using the motor-generator, During HEV drive mode, the first and second engagement elements engage to drive the vehicle using both power sources. During a third drive mode, the first engagement element engages and the second engagement element slip-engages to drive the vehicle by both power sources. When a detected temperature of the second engagement element is too high during low-speed driving, the EV drive mode is selected to enhance durability of the second engagement element.
98 Citations
20 Claims
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1. A control apparatus for a hybrid vehicle, comprising:
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an engine; a motor-generator; a first engagement element disposed between the engine and the motor-generator; a second engagement element disposed between the motor-generator and a drive wheel; a temperature detector operable to detect a temperature of the second engagement element; and a controller operable to; selectively provide one of a first drive mode in which the first engagement element is disengaged and the second engagement element is engaged to drive the vehicle only using the motor-generator, a second drive mode in which the first and second engagement elements are engaged to drive the vehicle using both the engine and the motor-generator and a third drive mode in which the first engagement element is engaged and the second engagement element is in slip-engagement to drive the vehicle using both the engine and the motor-generator; and select the first drive mode when the temperature of the second engagement element is higher than or equal to a predetermined temperature value during a low-speed driving period below a predetermined vehicle speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A controller for a hybrid vehicle having an engine, a motor-generator, a first engagement element disposed between the engine and the motor-generator, and a second engagement element disposed between the motor-generator and a drive wheel, the controller comprising:
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means for detecting a temperature of the second engagement element; and means for disengaging the first engagement element and engaging the second engagement element to drive the vehicle only by a driving force produced by the motor-generator when a temperature of the second engagement element is higher than or equal to a predetermined temperature value during a low-speed driving period below a predetermined vehicle speed. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A control method for a hybrid vehicle including a motor-generator, an engine, a first engagement element disposed between the engine and the motor-generator and a second engagement element disposed between the motor-generator and a drive wheel, the method comprising:
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detecting a temperature of the second engagement element; and disengaging the first engagement element and engaging the second engagement element to drive the vehicle only by a driving force produced by the motor-generator when a temperature of the second engagement element is higher than or equal to a predetermined temperature value during a low-speed driving period below a predetermined vehicle speed. - View Dependent Claims (17, 18, 19, 20)
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Specification