Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Transmission control
Patent
1992-09-16
1999-06-22
Louis-Jacques, Jacques H.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Transmission control
701 57, 701 58, 701 51, 477131, 477143, 706900, G06G 770
Patent
active
059139161
ABSTRACT:
Transmission output speed and engine throttle position are inputs to a control which determines acceleration and input speed. Fuzzy logic has acceleration and throttle membership functions and a set of upshift and downshift values, and rules for weighting each of the values in accordance with the degree of membership of acceleration and throttle position in certain of the functions to determine a downshift point and an upshift point. The input speed is compared to the shift points to decide whether to order a shift. Two or more sets of shift values are stored and are selectable for different performance options. The shift values are stated in terms of a percentage of engine governed speed to allow different engines to be coupled to the transmission. Lockup clutch apply and release logic controls converter lockup to maintain converter mode when significant torque multiplication is occurring and generally to maintain lockup mode when the transmission range is at or above the lowest allowable lockup range.
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Bai Shushan
Mc Cauley Phillip Franklin
Robinson Timothy Alan
Thompson Scott Mc Clellan
Bridges Michael J.
General Motors Corporation
Louis-Jacques Jacques H.
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