Jaguar Land Rover Limited

Simon Sutton

Steve Mullane

Sam Burt

Malkit Ram

Rob Jerger

Richard Clarke

Darren Vincent

Kevin Holt

Aspects of the present invention relates to a vehicle control system () for controlling a vehicle transfer case (). The transfer case () is operable in a high range and a low range. The vehicle control system () is configured to output a range change signal to implement a transfer case range change. The vehicle control system () also outputs a brake control signal for controlling vehicle braking during the range change. The present invention also relates to a vehicle () and a related method of operating a vehicle control system () and optionally also a transmission ().

Vehicle control system and method

Aspects of the present invention relate to a vehicle control system () for controlling a vehicle transfer case (). The transfer case () is operable in a high range and a low range. The vehicle control system () is configured to determine an operating range for the transfer case () based on a selected vehicle operating mode. A range change signal is output to implement a range change to engage the determined operating range. The present invention also relates to a vehicle () and a related method of operating a vehicle control system ().

Aspects of the present invention relates to a vehicle control system () for controlling a vehicle transfer case (). The transfer case () is operable in a high range and a low range. The vehicle control system () includes a selection means () for selecting first and second control strategies for the transfer case. The first and second control strategies are based on an activation time of the selection means (). A further aspect of the present invention relates to a vehicle control system () for implementing a deferred transfer case range change. The present invention also relates to a vehicle () and a related method of operating a vehicle control system ().

In response to driver selection of PARK, a vehicle transmission is commanded to momentarily select and hold NEUTRAL before PARK, while a vehicle wheel brake is applied. Such an arrangement avoids trapping torque in the driveline, and thus can obviate pawl 'thump' when PARK is next disengaged.

Vehicle transmissions having a park function

The present invention relates to a method of engaging an input gear with an output gear in a drivetrain (). The input gear is coupled to an input shaft () and the output gear is coupled to an output shaft (). The method includes calculating a target input speed (S') for the input shaft () to match a rotational speed of the input gear to a rotational speed of the output gear. The calculated target input speed (S&#x2032;) is then modified to include an offset and the input speed (S) of the input shaft () is then modified in dependence on the modified target input speed (S&#x2033;). The input gear and the output gear engage when the input speed (S) of the input shaft () at least substantially matches the modified target input speed (S&#x2033;). The present invention also relates to an apparatus.

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Coventry, United Kingdom

Simon Sutton