Abstract:
A method and system of providing steering in cruise control, in low friction conditions, at low speed and in low range. Speed of individual vehicle wheels is repeatedly and automatically adjusted to ensure that the actual rate of turn of the vehicle approaches the theoretical rate of turn as demanded by the vehicle driver.
Abstract:
A vehicle control strategy provides for automatically controlled movement from rest with deliberate wheel slip to maximize thrust. Different wheel slip conditions are provided for different terrain types. Wheel slip may be progressively reduced as the vehicle reaches a steady state speed. The strategy may also be implemented to maintain vehicle progress on low friction surfaces. The vehicle driver may be commanded to vary a control input, such as accelerator pedal position.
Abstract:
A system for controlling vehicle speed in accordance with a current value of vehicle set-speed. The system responds to user input to change the current value of vehicle set-speed to a different value and is configured to store the current value of set-speed in a memory as a stored set-speed and to change the current value of set-speed in dependence on the user input. The speedometer indicates both the current and stored set-speeds. The system can return the current value of vehicle set-speed to the stored set-speed upon receipt of a “resume” or other user command. The system can enter into a descent control mode that applies braking torque but no drive torque and can also enter into a full functionality mode that provides either drive or braking torque to maintain the vehicle at the set-speed.
Abstract:
A system for controlling vehicle speed in accordance with a current value of vehicle set-speed. The system responds to user input to change the current value of vehicle set-speed to a different value and is configured to store the current value of set-speed in a memory as a stored set-speed and to change the current value of set-speed in dependence on the user input. The speedometer indicates both the current and stored set-speeds. The system can return the current value of vehicle set-speed to the stored set-speed upon receipt of a “resume” or other user command. The system can enter into a descent control mode that applies braking torque but no drive torque and can also enter into a full functionality mode that provides either drive or braking torque to maintain the vehicle at the set-speed.
Abstract:
Apparatus for controlling movement of a vehicle, a system and vehicle comprising the apparatus, and a method for controlling the movement of a vehicle are disclosed. The apparatus comprises a controller configured to receive first signals from a receiving means in dependence on received transmitted signals from a remote control device indicating a requested motion of a vehicle and to receive second signals indicative of a value of traction of the vehicle. A maximum speed value for the vehicle is determined in dependence on the value of traction of the vehicle and/or on one or both of the detected pitch and roll angles of the vehicle. The controller provides an output signal for controlling speed of the vehicle based on the requested motion. The output signal is limited dependent upon the maximum speed value determined by the controller.
Abstract:
Some embodiments of the invention provide a speed control system (10, 12) for a vehicle (100), comprising: torque control means (12) for automatically causing application of positive and negative torque, as required, to one or more wheels (111, 112, 114, 115) of a vehicle (100) to cause a vehicle (100) to travel in accordance with a target speed value; path prediction means (10) for predicting a path PP of the vehicle (100) in a direction of travel; detection means (10) for detecting one or more objects (195) ahead of the vehicle (100); determining means (10) to determine whether one or more objects (195) detected by the detection means (10) lie outside the predicted path (PP); and control means (12) configured to, if said one or more detected objects (195) are determined to lie outside the predicted path (PP), automatically temporarily reduce the vehicle speed in dependence at least in part on a distance of the one or more detected objects (195) from the predicted path (PP).
Abstract:
A motor vehicle controller comprising data processing apparatus, the data processing apparatus configured to carry out the steps of: receiving a surface friction signal indicative of a coefficient of friction between a road wheel and a driving surface; receiving an accelerator position signal indicative of a position of an accelerator control with respect to an allowable range of positions; determining a powertrain torque limit value corresponding to an amount of powertrain torque at which slip of a driving wheel is expected to exceed a predetermined amount, the powertrain torque limit value being determined at least in part in dependence on the surface friction signal; and determining and outputting a powertrain torque demand signal corresponding to an instant amount of torque to be developed by a powertrain, the powertrain torque demand signal being determined in dependence at least in part on the accelerator position signal according to a predetermined relationship.
Abstract:
A speed control system configured automatically to cause a vehicle to operate in accordance with a first target speed value stored by the system at least in part by controlling an amount of drive torque applied to one or more wheels by a powertrain. The system is configured to receive a driver drive demand signal indicative of an amount of driver demanded drive torque to be applied to one or more wheels, and is configured to cause the vehicle to operate in accordance with a second target speed value greater than the first in dependence at least in part on the driver drive demand signal.
Abstract:
A speed control system for a vehicle includes an electronic controller configured to automatically cause a vehicle to operate in accordance with a target speed value. The electronic controller is further configured to receive information relating to movement of at least a portion of a vehicle body or at least a portion of a body of an occupant relative to a vehicle, and to automatically adjust the value of the target speed value in dependence on the received information.
Abstract:
A method for operating a speed control system of a vehicle is provided. The method comprises receiving one or more electrical signals representative of vehicle-related information. The method further comprises determining, based on the signals representative of vehicle-related information, whether one or more predetermined conditions are met. The method still further comprises automatically determining a baseline set-speed for the speed control system when it is determined that at least certain of the one or more predetermined conditions are met. The method yet still further comprises adjusting the baseline set-speed to determine an instantaneous set-speed of the speed control system based on a signal indicative of a desired comfort level. A speed control system comprising an electronic control unit configured to perform the above-described methodology is also provided.