A hill start assist system for a motor vehicle including a control system using sensor data from at least one sensor to provide the hill start assist with improved response behavior. The control system activating the hill start assist automatically and independently of whether the motor vehicle is on an upward incline depending on sensor data from the sensor indicating a local upward gradient in a driving surface in a region of a vehicle axle.

In a control system and control method for a driving device, opposite distribution control is performed (e.g., steps 1, 4 to 7), whereby a left driving force and a right driving force are controlled such that a yaw moment in a direction opposite to a turning direction of the vehicle acts on the vehicle, whereby a left-right driving force difference is generated which is a difference between the left driving force and the right driving force. During performance of the opposite distribution control, when deceleration of the vehicle is obtained, limit control is performed (e.g., step 8), whereby the left driving force and the right driving force are controlled such that a change in the left-right driving force difference becomes smaller than a change in a left-right driving force sum, which is the sum of the left driving force and the right driving force.

The present disclosure relates to systems and methods of automatically distributing powertrain demand between tandem drive axles in a tandem drive axle system for balanced tire wear between the tandem drive axles. Examples described herein analyze input signals collected from various vehicle sensors about operating conditions of the front and back tandem drive axles, and automatically bias a distribution of torque demand between the front and back tandem drive axles to correct for asymmetric wear based on known normal wear of the tires under like operating conditions.

A cruise control method includes determining that a host vehicle is traveling downhill and determining an axle torque command to maintain a predetermined headway distance from the host vehicle to a lead vehicle while the host vehicle is traveling downhill. The method further includes determining that a brake of the host vehicle is actuated to provide the axle torque command previously determined and comparing the axle torque command with a brake exit threshold to determine whether the axle torque command is greater than the brake exit threshold. Further, the method includes comparing the headway distance between the host vehicle and the lead vehicle with a headway exit threshold to determine whether the headway distance between the host vehicle and the lead vehicle is greater than the headway exit threshold. Also, the method includes commanding the brake of the host vehicle to disengage to terminate braking.

A cruise control method includes determining that a host vehicle is traveling downhill and determining an axle torque command to maintain a predetermined headway distance from the host vehicle to a lead vehicle while the host vehicle is traveling downhill. The method further includes determining that a brake of the host vehicle is actuated to provide the axle torque command previously determined and comparing the axle torque command with a brake exit threshold to determine whether the axle torque command is greater than the brake exit threshold. Further, the method includes comparing the headway distance between the host vehicle and the lead vehicle with a headway exit threshold to determine whether the headway distance between the host vehicle and the lead vehicle is greater than the headway exit threshold. Also, the method includes commanding the brake of the host vehicle to disengage to terminate braking.

The vehicle control device decreases the second driving force at a first rate of decrease when limiting the second driving force in a state where the second driving force limiting process is not executed, and decreases the second driving force at a second rate of decrease smaller than the first rate of decrease when the second determination unit determines that the second condition is fulfilled in a state where the second driving force limiting process is executed.

A vehicle control system may include a sensor network sensing vehicle attitude information and a controller operably coupled to the sensor network to determine, based on the vehicle attitude information, movement of a center of gravity of the vehicle relative to an axis of rotation of the vehicle. The controller may further determine a modification to a torque application of the vehicle based on the movement of the center of gravity of the vehicle relative to the axis of rotation of the vehicle.

A method of control allocation in a multi-unit vehicle combination is provided. The units include actuators configured to generate propulsion and/or braking forces. The method includes receiving a virtual control input for the vehicle combination as a whole, solving a control allocation problem to find a true control input for the actuators, including attempting to minimize a difference between the true control input and a reference control input. The method includes controlling the actuators based on the true control input. In particular, the method includes generating the reference control input such that a) capabilities of the actuators are taken into account, and b) such that a longitudinal force contribution of one vehicle unit does not counteract the contribution of another vehicle unit.

A driving force adjusting device includes an input unit configured for receiving an input of a selection distribution ratio, which is a ratio of driving force generation of front wheels and rear wheels selected by a user, a receiving unit configured for receiving driving information of a vehicle, a driving force determination unit configured for determining a driving force distribution ratio, which is a driving force generation ratio of the front wheels and the rear wheels, and determining driving force of the front wheels and the rear wheels using the driving force distribution ratio, and a driving control unit configured for controlling a driving unit generating driving force of the vehicle based on the driving force determined by the driving force determination unit.

A control method for driving series mode of a hybrid vehicle is suitable for a four-wheel drive powertrain of a hybrid vehicle and can further improve a charging efficiency by implementing a second series mode, in which a vehicle is driven by a second motor for driving rear wheels, which is employed for a four-wheel drive powertrain of a hybrid vehicle, and an energy storage device is charged by power generation operation of a first motor connected to an engine through an engine clutch, beside a first series mode in which a vehicle is driven by the first motor and the energy storage device is charged by power generation operation of a third motor directly connected to the engine so that the first series mode or the second series mode may be selected in accordance with driver request power and charge power for the energy storage device.