Back to results
US 6,655,198 B2Granted
Learning method for an automatic transmission of a vehicle and a system thereof
AssigneeHyundai Motor Company
InventorByeong-Wook Jeon
Life of this patent
Estimating the term…
Abstract
In order to enable a more rapid shift and to prevent tie-up from occurring when a down-shift occurs during an up-shift, an amount of overrun produced during the down-shift is detected, and a hydraulic duty for an engaging element of the down-shift is modified by performing one of adding and subtracting a correction value, the correction value being calculated based on the detected amount of overrun, such that the amount of overrun will converge to a predetermined minimal level.
Claims14
A learning method for an automatic transmission of a vehicle, comprising:
- detecting an amount of overrun produced during a down-shift occurring during execution of an up-shift;
- determining whether said amount of overrun is greater than a predetermined level;
- and
- modifying a hydraulic duty for an engaging element of the down-shift on the basis of said amount of overrun and the determination of whether said amount of overrun is greater than a predetermined level.
1 more element
A learning system for an automatic transmission of a vehicle, comprising:
- a revolution speed detector detecting at least one of engine revolution speed and turbine revolution speed;
- and
- a transmission control unit communicating with said speed detector, wherein said transmission control unit includes instructions for:
- detecting an amount of overrun produced during a down-shift occurring in an up-shift;
- determining whether said amount of overrun is greater than a predetermined level;
- and
- modifying a hydraulic duty for an engaging element of the down-shift on the basis of said amount of overrun and determination of whether said amount of overrun is greater than a predetermined level.
4 more elements
Dependencies are inferred from the claim text.