A system and method of controlling engine clutch engagement during TCS operation of a hybrid vehicle are provided. The method includes determining whether a TCS is operating and upon determining that the TCS is operating, determining a compensation value for early engagement of an engine clutch during the TCS operation based on a difference between a front wheel speed and a rear wheel speed and a slip amount of front wheels. Additionally, the method includes determining whether engagement of the engine clutch is capable of being started based on the compensation value and starting the engine clutch engagement. Since the engagement of the engine clutch is controlled based on the speed of non-drive wheels during TCS operation, the engagement stability of the engine clutch is improved and the amount of time required to engage the engine clutch is decreased.

A driving force control device 1 for a vehicle V comprises: a D- map M1 defining a linear correlation between a driving stiffness D and a maximum road surface ; a slip ratio calculation circuit 21 for calculating a slip ratio S of one of a pair of front road wheels 10L, 10R; a DS calculation circuit 22 for calculating the driving stiffness D corresponding to a value the slip ratio S calculated by the slip ratio calculation circuit 21; a maximum road surface calculation circuit 23 for assigning a value of the driving stiffness D calculated by the DS calculation circuit 22 to the D- map M1 to calculate the maximum road surface ; and a driving force distribution circuit 24 for controlling a driving force, using a value of the maximum road surface calculated by the maximum road surface calculation circuit 23.

The invention relates to a method for carrying out a starting operation of a motor vehicle having a gear train that includes a dual clutch transmission with a first clutch that carries the odd-numbered gears, and a second clutch that carries the even-numbered gears, wherein the second clutch of the dual clutch transmission is used, at least in part, for preloading the gear train.

A method is provided for controlling a drivetrain of a vehicle, wherein the drivetrain comprises a multi-clutch transmission. The gear shift of the multi-clutch transmission is adapted to be performed either by power cut shift or by power shift dependent on predetermined vehicle shift conditions. The method includes detecting at least one of a plurality of indications of slippery road conditions and setting a slip risk factor, wherein the slip risk factor is dependent on the indication of slippery road conditions. If the slip risk factor is above a first predetermined threshold value the method further comprises controlling the multi-clutch transmission such that an upcoming gear shift is performed as a power-shift independently of if upcoming shift was determined to be performed as a power-cut shift or as a power shift.

A control apparatus for a vehicle drive-force transmitting apparatus including a gear mechanism and a continuously-variable transmission mechanism provided in respective first and second drive-force transmitting paths. The control apparatus sets a target gear ratio of the continuously-variable transmission mechanism during a switching control operation that is executed to switch between (i) a first state in which the first drive-force transmitting path is established and (ii) a second state in which the second drive-force transmitting path is established, such that, when drive wheels are not being slipped, the target gear ratio is set to a highest gear ratio of the continuously-variable transmission mechanism, and such that, when the drive wheels are being slipped, the target gear ratio is set to an actual gear ratio at a point of time at which the drive wheels start being slipped.

A method is provided for determining whether or not ground contact loss is imminent for a wheel of a vehicle, the vehicle including a vehicle body having a vertical extension in a vertical direction, the wheel being allowed to be subjected to a relative vertical displacement, in the vertical direction, in relation to the vehicle body, the vehicle further being such that a maximum value of a vertical displacement of the wheel relative to the vehicle body is limited to a relative vertical displacement limit, the method including determining an actual relative vertical displacement of the wheel relative to the vehicle body, determining a limit margin as the difference between the actual relative vertical displacement and the relative vertical position limit, and determining that ground contact loss is imminent for a wheel if the limit margin is within a predetermined vertical threshold range.

Some embodiments of the present invention provide a control system configured to control a driveline of a motor vehicle to operate in a selected one of a plurality of configurations, the system being configured to cause the driveline to operate in a first configuration and not a second configuration in dependence on a first set of one or more conditions, the system being further configured to override operation in the first configuration and cause the driveline to operate in the second configuration and not the first configuration in dependence on the first set of one or more conditions and in addition a second set of one or more conditions.

A machine system and method are disclosed to generally prevent the tire slip of a machine conducting work. The machine system utilizes a controller in operable communication with a lift cylinder and lift cylinder pressure signal responsively producing a signal corresponding to a pressure within the lift cylinder. The controller utilizing the lift cylinder pressure signal to determine a rimpull limit for the machine and operably adjusting a torque of the machine to the rimpull limit proactively.

A method of applying a brake force to all four wheels of a motor vehicle to stop the vehicle while torque continues to be applied to its driven wheels; and preventing wheel slippage of the driven wheels by reducing the applied torque when the vehicle is stopped or nearly stopped from moving in a forward direction. In this way, unintentional lateral movement of the vehicle due to creep torque applied to the driven wheels on slippery surfaces can be prevented or corrected.

A control apparatus for a vehicle includes: a decider; and a rotation speed controller. The decider is configured to decide on a basis of a traveling state of the vehicle that a wheel which is spun is coupled to a drive source to increase a number of driving wheels. The rotation speed controller is configured to decide increase a rotation speed of the drive source in advance in accordance with an information of a vehicle behavior unstableness degree which is acquired from an outside of the vehicle before the wheel is coupled to the drive source.