Method for controlling a damper clutch
First Claim
1. A method for controlling a damper clutch in a torque converter of a combustion engine using only a power of an engine, comprising:
- determining, by an electronic control unit (ECU) or a transmission control unit (TCU), whether the damper clutch is in a slip or lock-up state in a driving state of a vehicle;
determining whether a condition of the vehicle is within a predetermined resonant range;
determining whether a torque of the vehicle is within a predetermined resonant torque range;
detecting, by a sensor, a subharmonic vibration when the damper clutch is in the slip or lock-up state, the condition of the vehicle is within the predetermined resonant range, and the torque of the vehicle is within the predetermined resonant torque range; and
controlling, by the electronic control unit (ECU) or the transmission control unit (TCU), the damper clutch to slip or be open when the subharmonic vibration is larger than a predetermined value;
wherein the damper clutch has a 2-stage stiffness structure by applying dual damper springs, and the resonant torque range is a predetermined range that includes a torque corresponding to a break point of stiffness of the damper clutch; and
wherein the controlling of the damper clutch to slip or be open includes controlling the damper clutch to slip when the subharmonic vibration is larger than a predetermined first index value.
1 Assignment
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Accused Products
Abstract
A method for controlling a damper clutch may include determining whether the damper clutch is in a slip or lock-up state in a driving state of a vehicle, determining whether a condition of the vehicle is within a predetermined resonant range, determining whether a torque of the vehicle is within a predetermined resonant torque range, detecting a subharmonic vibration when the damper clutch is in the slip or lock-up state, the condition of the vehicle is within the predetermined resonant range, and the torque of the vehicle is within the predetermined resonant torque range, and controlling the damper clutch to slip or be open when the subharmonic vibration is larger than a predetermined value.
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Citations
4 Claims
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1. A method for controlling a damper clutch in a torque converter of a combustion engine using only a power of an engine, comprising:
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determining, by an electronic control unit (ECU) or a transmission control unit (TCU), whether the damper clutch is in a slip or lock-up state in a driving state of a vehicle; determining whether a condition of the vehicle is within a predetermined resonant range; determining whether a torque of the vehicle is within a predetermined resonant torque range; detecting, by a sensor, a subharmonic vibration when the damper clutch is in the slip or lock-up state, the condition of the vehicle is within the predetermined resonant range, and the torque of the vehicle is within the predetermined resonant torque range; and controlling, by the electronic control unit (ECU) or the transmission control unit (TCU), the damper clutch to slip or be open when the subharmonic vibration is larger than a predetermined value; wherein the damper clutch has a 2-stage stiffness structure by applying dual damper springs, and the resonant torque range is a predetermined range that includes a torque corresponding to a break point of stiffness of the damper clutch; and wherein the controlling of the damper clutch to slip or be open includes controlling the damper clutch to slip when the subharmonic vibration is larger than a predetermined first index value. - View Dependent Claims (2, 3, 4)
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Specification