Disclosed is an acceleration limit function relaxation apparatus. The apparatus may determine, based on information indicating manipulation of a brake pedal of a vehicle during an acceleration limit mode, that the vehicle is in a temporary braking state, determine a vehicle speed, measured at a start of the manipulation of the brake pedal, as a target vehicle speed for reacceleration, determine, based on information indicating manipulation of an accelerator pedal, that the vehicle is reaccelerated, determine an acceleration limit relaxation factor based on a cumulative braking amount calculated by measuring amounts of braking during the temporary braking state, and cause acceleration limit relaxation of the vehicle by applying the acceleration limit relaxation factor to an acceleration limit of the vehicle.

A method for operating an accelerator pedal-controlled distance controller of a vehicle. The distance controller regulates a distance to a target vehicle as a function of an actuator pedal value of the vehicle and activates automatic braking operations as necessary. A braking operation is aborted when the accelerator pedal value is increased during the braking operation.

Systems, methods, and vehicles for closed-loop control of regenerative braking. The system includes, in one implementation, a regenerative braking subsystem and a vehicle controller. The vehicle controller is configured to command the regenerative braking subsystem to apply a first amount of regenerative braking torque. The vehicle controller is also configured to determine a current vehicle deceleration while the first amount of regenerative braking torque is applied. The vehicle controller is further configured to determine a difference between the current vehicle deceleration and a target vehicle deceleration. The vehicle controller is also configured to set a second amount of regenerative braking torque to reduce the difference between the current vehicle deceleration and the target vehicle deceleration. The vehicle controller is further configured to command the regenerative braking subsystem to apply the second amount of regenerative braking torque.

A method of assisting deceleration during a stop of a motor vehicle having a drivetrain including a traction motor, a road wheel operatively connected to the drivetrain, a friction brake configured to decelerate the road wheel, and an electronic controller includes detecting, via the electronic controller, a request to stop the vehicle. The method also includes commanding the traction motor to provide regenerative braking in response to the request to stop the vehicle. The method additionally includes determining a current vehicle operating state. The method also includes determining an amount of brake drag torque to be generated by the friction brake based on the current vehicle operating state. The method further includes commanding an application of the determined amount of the brake drag torque in parallel with the regenerative braking, thereby operating the friction brake as a mechanical drivetrain damper while assisting the regenerative braking to stop the motor vehicle.

A brake-by-wire braking system for a vehicle having at least two wheels which are able to be braked is described. The braking system comprises at least two brake actuator units, each of which can be associated with one of the wheels of the vehicle which are able to be braked. The braking system further comprises a brake actuation unit for actuation by the driver for braking, having at least one sensor for detecting an activation of the brake actuation unit by the driver, an acceleration actuation unit having at least one sensor for detecting the activation of the acceleration actuation unit by the driver, and at least one electronic control unit which is adapted to operate one or both of the brake actuator units in order to bring about a braking force at an associated wheel. The control unit is adapted to operate the brake actuator units on the basis of an activation of the acceleration activation unit in the event of a fault or failure of the brake actuation unit.

A vehicle includes wheels, brakes, and a controller. The wheels are configured to propel the vehicle. The brakes are configured to generate a braking torque at the wheels. The controller is programed to, in response to (i) a commanded braking torque and (ii) a relative jounce between two of the wheels exceeding a threshold, operate the brakes to increase the braking torque to less than the commanded braking torque. The controller is further programed to, in response to (i) the commanded braking torque and (ii) a droop of at least one of the wheels exceeding a threshold, operate the brakes to increase the braking torque to less than the commanded braking torque.

An electro-hydraulic brake system includes a master cylinder (MC) configured to supply fluid into a first MC fluid passageway in response to pressing force on a brake pedal; a pressure supply unit (PSU) assembly having a PSU motor coupled to a ball screw actuator, a PSU housing defining a piston bore having a terminal end opposite the PSU motor, and a PSU piston dividing the piston bore into a first chamber and a second chamber and movable by the ball screw actuator, with each of the first chamber and the second chamber containing a hydraulic fluid; and a backup pump assembly including a pump for supplying the brake fluid to at least one of the wheel brakes. The ball screw actuator includes an actuator nut assembly having a plurality of ball bearings each disposed within the piston bore and submerged in the hydraulic fluid.

A driving assistance control apparatus of a vehicle includes a blind area detector, a driving operation detector, and an electronic control unit. The blind area detector is configured to detect the presence or absence of a blind area as seen from the vehicle in a traveling direction of the vehicle. The driving operation detector is configured to detect driving operation of the driver. The electronic control unit is configured to perform automatic deceleration control of the vehicle based on detection of the presence of the blind area by the blind area detector. The electronic control unit is configured to start the automatic deceleration control, by referring to the driving operation of the driver after detection of the presence of the blind area by the blind area detector.

A method of controlling an electric vehicle includes operating the vehicle in accordance with a current pedal map. A plurality of alternative pedal maps is defined. A variance for each of the plurality of alternative pedal maps is determined. Operation of the vehicle is switched from the current pedal map to one of the alternative pedal maps based on the determined variance.

A system and a device shut off the accelerator function and converts the accelerator function immediately into a brake function for safety in the event of a malfunction when the accelerator pedal is accidentally depressed by a panic or the like. A new finding correlation data showing a relationship between a driver's body weight W and a pedal stepping force F is obtained, and based on this, an accelerator-brake switching set value A is determined, and an accelerator mechanism which detects a stepping pressure F(s) by a pressure sensor and when the stepping force F exceeds over a set value A, that is, F(s)≥0.8×W×(X/Y), it is determined that an abnormal operation happens, so then the brake sensor sends an emergency signal to ECU to stop the throttle driving means, and also actuate the brake driving means through ECU.