Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Transmission control
Patent
1995-10-19
1998-07-07
Louis-Jacques, Jacques H.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Transmission control
701 51, 701 63, 701 67, 701 68, 74335, 74336R, 477 99, 477906, 192 357, 192 363, 180 531, 180273, G06G 770, F16H 5974
Patent
active
057783306
ABSTRACT:
A control system is provided for selectively placing a vehicle transmission in a neutral condition after startup of the vehicle. The transmission is of the type including a plurality of intermeshing gears and associated clutches. The clutches are engageable and disengageable in predetermined combinations in response to energization and de-energization of actuator coils to establish predetermined gear ratios between input and output shafts of the transmission. The control system includes a neutral circuit and a control circuit. The neutral circuit causes a current carrying path through the coils to be interrupted under the control of the control circuit. The neutral circuit preferably also causes the transmission to be placed in a neutral condition upon startup of the vehicle engine. The control circuit preferably includes a microprocessor that monitors operating conditions of the vehicle and the control system and causes the neutral circuit to interrupt the current path through the coils upon detection of a system failure. The neutral circuit is configured to latch after startup of the vehicle in neutral and the control circuit causes interruption of power to the coils by removing a ground connection through a relay coil in the neutral circuit.
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Case Corporation
Louis-Jacques Jacques H.
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