Method for controlling a damper clutch of an automatic transmission
AssigneeHyundai Motor Company
InventorChang-Gi Yeo
Life of this patent
Estimating the term…
Abstract
A method for controlling a damper clutch release control system which performs duty control in releasing a damper clutch for down-shifting in a sports mode decreasing gear-shift shock, is provided. The method requires determining whether a down-shift signal is inputted in a state when a gear shift mode is a sports mode and a throttle valve opening angle is within a predetermined range, and performing duty control until a transmission control outputs a down-shift start signal to a transmission when it is determined that the down-shift signal is inputted.
Claims7
A method for controlling a damper clutch for an automatic transmission comprising:
- determining whether a down-shift signal has been input when in a sports mode during a power-on state;
- and
- controlling a duty of the damper clutch to be gradually decreased at a predetermined rate until a transmission control unit outputs a down-shift start signal when it is determined that the down-shift signal has been input.
A method for controlling a damper clutch for an automatic transmission comprising:
- (a) determining whether a down-shift signal has been input when a gear shift mode is a sports mode and a throttle valve opening angle is within a predetermined range;
- and
- (b) immediately reducing a duty ratio of the damper clutch to a predetermined value when it is determined that the down-shift signal has been input;
- (c) decreasing the duty ratio of the clutch at a predetermined rate;
- and
- (d) simultaneously making the duty ratio zero and outputting the down-shift start signal to the transmission.
A method for controlling a damper clutch for an automatic transmission comprising:
- determining whether a down-shift signal has been input when in a sports mode during a power on state;
- and
- controlling a duty of the damper clutch until a transmission control unit outputs a down-shift start signal to a transmission when it is determined that the down-shift signal has been input, wherein controlling the duty of the damper clutch comprises,
- immediately reducing a duty ratio of the damper clutch to a predetermined value when it is determined that the down-shift signal has been input,
- decreasing the duty ratio of the clutch at a predetermined rate, and
- simultaneously making the duty ratio zero and outputting the down-shift start signal to the transmission.
Dependencies are inferred from the claim text.