A braking system that uses a combination of a friction brake force and a traction motor brake force to slow or stop the rotation of the wheel. A friction brake may provide the friction brake force. A traction motor may provide the traction motor brake force. The braking system may include sensors that provide data for determining a wheel lock threshold for each wheel. The friction brake force and the traction motor brake force may be adjusted for each wheel to provide an applied brake force to the wheel that is less than or equal to the wheel lock threshold.

An antilock control method for a braking system of a vehicle has at least the following steps: upon the presence of a brake request signal, outputting a brake control signal and building up a brake pressure by a braking medium at a wheel brake of a vehicle wheel, measuring a wheel speed of the vehicle wheel to be braked, and determining a wheel slip of the vehicle wheel, upon meeting a first traction criterion or a locking tendency of the vehicle wheel, activating a wheel drive unit and applying a wheel drive torque on the vehicle wheel to increase the wheel circumferential velocity and to reduce the wheel slip until a second traction criterion is met. The brake force introduced in the wheel brake is controlled as a function of the wheel slip by releasing the brake pressure upon satisfying a first traction criterion.

A vehicle control apparatus 10 is provided with an object detecting means detecting an object in a travel direction of a vehicle 30, a restraining means restraining a drive force of the vehicle when the object detecting means detects an object, and a jerk acquiring means acquiring a jerk in a travel direction on the basis of a behavior of the vehicle. When the accelerator of the vehicle is actuated while the vehicle is in a state in which the drive force of the vehicle is restrained, and the speed of the vehicle is lower than a predetermined value, the restraining means increases the drive force, and decreases a post-increase drive force on the basis of the jerk acquired by the jerk acquiring means.

The invention provides a system (10) for a motor vehicle (100) that receives drive demand information (161S) indicative of an amount of drive demanded of a powertrain (129) of the vehicle (100), and controls an amount of drive torque applied by the powertrain (129) to one or more road wheels (111, 112, 114, 115) in dependence on the drive demand information (116S). The system also receives gradient information (11GS) relating to the driving surface and vehicle speed information (Sv). The control system, in dependence on the gradient and speed information, automatically causes a braking system (12d) to apply brake force to one or more of the wheels (111, 112, 114, 115) to prevent vehicle rollback, and adjusts the amount of brake force applied in dependence on the drive demand information (161S) to cause the amount of brake force applied to increase progressively as the amount of drive demand decreases.

A method for stabilizing a vehicle combination including a towing vehicle and at least one trailer vehicle includes determining wheel revolution rates of a driven axle of the towing vehicle and a vehicle speed of the towing vehicle, checking, as a first criterion, whether there is braking wheel slip at the driven axle of the towing vehicle without the operation of a wheel brake of the driven axle of the towing vehicle, and actuating, in response to the first criterion being met, at least one wheel brake of the trailer vehicle.

Methods and systems for operating a vehicle on a reduced traction surface are disclosed. A controller of the vehicle obtains at least one of: ambient information or GPS information, determines a derate increment size based on the ambient or GPS information, imposes a sustained derate by applying a torque limit on a braking torque of the vehicle based on the derate increment size in response to detecting a traction control event. The controller also determines a verification period and a derate reduction period based on the ambient or GPS information to reduce the sustained derate in response to detecting a lack of traction control event during the verification period at a rate determined by the derate reduction period.

Methods and systems for operating a vehicle on a reduced traction surface are disclosed. A controller of the vehicle obtains at least one of: ambient information or GPS information, determines a derate increment size based on the ambient or GPS information, imposes a sustained derate by applying a torque limit on a braking torque of the vehicle based on the derate increment size in response to detecting a traction control event. The controller also determines a verification period and a derate reduction period based on the ambient or GPS information to reduce the sustained derate in response to detecting a lack of traction control event during the verification period at a rate determined by the derate reduction period.

A vehicle control apparatus includes: a VSA-ECU and an ESB-ECU that perform braking control to apply a braking torque in response to a brake operation by a driver of a host vehicle, and also perform brake holding control to hold the braking torque even when the brake operation is cancelled; and an engine control unit that performs idling stop control to stop driving of an engine that is a drive source of the host vehicle when a stop condition is satisfied, including that a vehicle speed of the host vehicle enters a predetermined low vehicle speed region, and also performs restart control to restart the engine when a predetermined restart condition is satisfied. The engine control unit prohibits execution of the idling stop control during execution of the brake holding control.

A transmission system for a vehicle including a drive, at least one wheel and at least one brake having an ABS system. The drive is configured to drive the at least one wheel and the at least one brake is configured to brake the at least one wheel. The power transmission system is configured to also drive the at least one wheel braked by the at least one brake during a braking process, which enters a control range of the ABS system, at the same time using a drive torque.

A braking control device is disclosed. The braking control device may include one or more processors, communicatively coupled to one or more memories, to: determine a threshold for triggering a brake dragging event for a machine based on one or more parameters relating to activity of the machine; determine, based on a set of sensor measurements, that the threshold for triggering the brake dragging event is satisfied for a threshold quantity of time intervals; and perform a brake dragging response action based on determining that the threshold for triggering the brake dragging event is satisfied for the threshold quantity of time intervals.