Jaguar Land Rover Limited

Craig Percy

Rob Jerger

Tim Reynolds

A vehicle () has an automatic multi-speed transmission. For starting from rest a launch ratio is selected by a slope and/or obstacle device () according to identification of an up-slope (), a down slope, or an obstacle ().

Multi-speed automatic vehicle transmission

The present invention relates to a control system for a vehicle powertrain (). The vehicle powertrain () includes a transmission (), a launch control clutch (), and a transfer case () selectively operable in a high range and a low range. The control system includes a monitor () for monitoring one or more operating parameters of the launch control clutch () and/or the transmission (). The control system comprises a controller () configured, in dependence on said monitoring means determining that said one or more operating parameters are above a predefined operating threshold or outside a predefined operating range, to output a notification to the user to select said low range; and/or to output a transfer case control signal to the transfer case () automatically to select said low range.

Control system and method

A control system for a vehicle includes a powertrain comprising a prime mover and a driveline. The control system selectively controls the driveline to assume a first state in which a transmission of the driveline is substantially fully connected to the prime mover and a second state in which when the vehicle is stationary the transmission is at least partially disconnected or decoupled from the prime mover to reduce a torque loading on the prime mover. The control system controls the driveline to assume the second state when the vehicle is held stationary by a brake in response to actuation of a driver operable brake control. Upon release of the brake control, the control system verifies that a first portion of a powertrain of the vehicle is rotating at a speed exceeding a prescribed threshold and commands the driveline to assume the first state before permitting release of the brake.

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Coventry, United Kingdom

Craig Percy