System and method for calibrating a transmission
First Claim
1. A transmission control device for a vehicle having a powertrain including an engine, a transmission with a plurality of solenoid actuated friction elements, and sensors, the device comprising:
- at least one connection for transmitting signals to and from the engine, the transmission, and the sensors within the vehicle; and
a memory for storing a program for adjusting and controlling the transmission and data including friction element apply pressure data, the program directing the powertrain to perform a static condition procedure while the vehicle is stationary by incrementally increasing an on-coming apply pressure for each of the friction elements sequentially until a minimum on-coming apply pressure is determined for each of the friction elements based on a sensed friction element performance, the program storing the determined minimum on-coming apply pressures in the memory as initial optimized values, the program directing the powertrain to perform a dynamic condition procedure while the vehicle is being driven to determine a modified minimum on-coming apply pressure for each of the friction elements based on a sensed performance of an element within the powertrain, the program storing the modified minimum on-coming apply pressures in the memory as further optimized values, after completion of the dynamic condition procedure, the program controlling the transmission during operation of the vehicle using the further optimized values.
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Accused Products
Abstract
A method of adjusting operating parameters of a transmission of a vehicle may include accessing a stored list of clutch parameters; performing a static condition procedure to revise the clutch parameters; and performing a dynamic condition procedure to further revise the clutch parameters. The method may be performed by a transmission control device for the vehicle, the vehicle having a powertrain including an engine, the transmission with a plurality of solenoid actuated friction elements, and sensors. The static condition procedure and dynamic procedures may be performed incrementally, and the static condition procedure may be performed more than once to fine tune the results.
29 Citations
22 Claims
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1. A transmission control device for a vehicle having a powertrain including an engine, a transmission with a plurality of solenoid actuated friction elements, and sensors, the device comprising:
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at least one connection for transmitting signals to and from the engine, the transmission, and the sensors within the vehicle; and a memory for storing a program for adjusting and controlling the transmission and data including friction element apply pressure data, the program directing the powertrain to perform a static condition procedure while the vehicle is stationary by incrementally increasing an on-coming apply pressure for each of the friction elements sequentially until a minimum on-coming apply pressure is determined for each of the friction elements based on a sensed friction element performance, the program storing the determined minimum on-coming apply pressures in the memory as initial optimized values, the program directing the powertrain to perform a dynamic condition procedure while the vehicle is being driven to determine a modified minimum on-coming apply pressure for each of the friction elements based on a sensed performance of an element within the powertrain, the program storing the modified minimum on-coming apply pressures in the memory as further optimized values, after completion of the dynamic condition procedure, the program controlling the transmission during operation of the vehicle using the further optimized values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of adjusting and using operating parameters of a transmission of a vehicle, the transmission having a plurality of friction elements, the method comprising:
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accessing a stored list of clutch parameters; performing a static condition procedure while the vehicle is stationary to revise the clutch parameters, the static condition procedure including incrementally increasing on-coming apply pressure for each of the friction elements in the transmission until an minimum on-coming apply pressure is obtained for each of the friction elements; storing the minimum on-coming apply pressures as initial optimized values in a revised list of clutch parameters; and performing a dynamic condition procedure while the vehicle is driven to further revise the clutch parameters, the dynamic condition procedure including determining a modified minimum on-coming apply pressure for each of the friction elements based on a sensed performance of an element within the powertrain; storing the modified minimum on-coming apply pressure as further optimized values in a further revised list of clutch parameters; and operating the vehicle using the further revised list of clutch parameters. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification