METHOD FOR OPERATING A TRANSMISSION UNIT OF A VEHICLE DRIVELINE WITH AN ENGINE
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Accused Products
Abstract
A method for operating a transmission of a vehicle drivetrain. A transmission ratio can be automatically changed during an operating state depending on a comparison of current operating state parameters with operating parameters stored in a control unit, and can be manually changed depending on a driver'"'"'s request. Accordingly when the driver requests a change of the transmission ratio, the transmission ratio changes, and a timer starts. If the driver continues the ratio change from an actual transmission ratio value toward a larger or smaller transmission ratio value, the current operating parameters are compared with the stored operating parameters. Upon this comparison, the transmission shifts to higher ratios in comparison to the operating parameters stored in a control device at higher vehicle speeds, and/or a delay between sequential, cyclical transmission ratio changes varies depending on a vehicle deceleration and/or braking pressure in the region of a vehicle brake.
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Citations
23 Claims
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1-11. -11. (canceled)
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12. A method for operating a transmission device (3) of a vehicle drivetrain (1) with a drive engine (2), a transmission ratio in the transmission device (3) being automatically changeable during an operating state characteristic of the vehicle drivetrain (1) depending on a comparison of current operating state parameters of the vehicle drivetrain (1) with additional operating parameters stored in a control unit, and being manually changeable depending on a driver'"'"'s request, the method comprising the steps of:
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changing the transmission ratio of the transmission device (3) and starting a timer when a driver'"'"'s request to change the transmission ratio is detected; upon determining a continuous driver'"'"'s request to change the transmission ratio proceeding from an actual transmission ratio value toward either a larger or smaller transmission ratio value over a predefined period, performing the comparison of the current operating parameters with the additional operating parameters stored in the control unit; and depending upon the comparison, at least one of changing the transmission ratio toward a larger transmission ratio value in comparison to the additional operating parameters stored in a control device at higher vehicle speeds, and variably delaying sequential, cyclical transmission ratio changes depending on at least one of vehicle deceleration and a braking pressure in a region of a vehicle brake. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of operating a transmission device (3) of a vehicle drivetrain (1) having a drive engine (2), the method comprising the steps of:
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initiating a change of transmission ratios of the transmission device (3) and starting a timer when a driver requests the change of the transmission ratios of the transmission device (3); comparing current operating parameters of the drivetrain with stored operating parameters that are stored in a control unit when the driver continues the request to change the transmission ratio from an actual transmission ratio value toward either a larger or a smaller transmission ratio value over a predefined period of time; depending on the comparison, at least one of changing the transmission ratio toward a larger transmission ratio value in comparison to the operating parameters stored in the control device at higher vehicle speeds, and variably delaying sequential, cyclical transmission ratio changes depending on at least one of vehicle deceleration and a braking pressure of a vehicle brake.
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Specification