A park brake controller and method are provided for control verification handling of an external park brake request. In one embodiment, a park brake controller comprises one or more processors and a non-transitory computer-readable medium storing program instructions. The program instructions, when executed by the one or more processors, cause the one or more processors to: receive a request to park a vehicle, wherein the request is associated with a control level; receive information about a speed of the vehicle; and determine an action to take in response to the request based on the control level of the request and the speed of the vehicle. Other embodiments are provided.

This vehicle speed control device includes: a driving force command generation unit that generates a driving force command FcmD on the basis of the actual vehicle speed V of the vehicle and a vehicle speed command Vcmd; an accelerator control unit that generates an opening degree command AC for the accelerator pedal on the basis of the driving force command Fcmd; a brake control unit that generates an opening degree command BK for the brake pedal on the basis of the driving force command Fcmd; and a step change control unit that selects, on the basis of the driving force command Fcmd, whether to perform an acceleration control mode in which the opening degree command AC is input to the drive robot, or a brake control mode in which the opening degree command BK is input to the drive robot.

A dump truck reduces drive wheel braking torques to avoid locking drive wheels during slipping and generates braking torques for driven wheels to ensure an overall braking torque using a controller that outputs a regenerative torque command value, corresponding to a brake pedal operation amount, to an inverter that regeneratively controls electric motors. The controller reduces the regenerative torque command value and outputs a drive command value, corresponding to a regenerative torque command value reduction amount, to a solenoid proportional valve, when the controller determines that slip ratios of rear wheels equal or exceed a predetermined value. A hydraulic pressure generated by a hydraulic valve based on the brake pedal operation amount actuates rear wheel brakes. A hydraulic pressure selected by a higher-pressure selecting valve that selects the higher of the hydraulic pressure from the hydraulic valve and the hydraulic pressure from the solenoid proportional valve actuates front wheel brakes.

A method of monitoring a rotor of a motor vehicle having a caliper assembly driven by a motor for braking the vehicle includes detecting at least one harmonic response during a braking operation indicative of the interaction between the caliper assembly and the rotor. The at least one harmonic response is evaluated during the braking operation and an operator of the vehicle is notified of a condition of the rotor based on the evaluation.

A computerized method of controlling a brake assembly applied to a wheel includes receiving, by a decoder circuit, an input signal from a sensor. The input signal indicates rotational speed of a wheel of a vehicle. The method also includes determining, by the decoder circuit, which sensor protocol from a set of sensor protocols is currently being used. The method further includes transforming, by the decoder circuit, the input signal to generate an output signal. The decoder circuit sets a pulse width of the output signal based on the determined sensor protocol. The method also includes transmitting, by the decoder circuit, the output signal to a controller. The method additionally includes determining, by the controller, an operational status of the wheel based on the output signal. The method also includes controlling, by the controller, application of the brake assembly to the wheel based on the operational status.

This disclosure provides systems and methods for deceleration control during emergency braking using control algorithm override. An embodiment of the present disclosure provides a computer-implemented method for deceleration by a controlling device of an autonomous driving vehicle (ADV). The method includes engaging a braking system of the ADV to decelerate the ADV using a first deceleration algorithm. When an onset of discrepancy between a velocity of the ADV and a corresponding wheel speed of the ADV is detected, a processing device, based on the discrepancy, overrides an output of the first deceleration algorithm using a second deceleration algorithm that prioritizes in reducing the discrepancy between the velocity of the ADV and the corresponding wheel speed of the ADV over a target rate of deceleration computed by the first deceleration algorithm.

A method for emergency engagement of a holding brake of a vehicle having an electropneumatic brake system. The electropneumatic brake system includes a service brake system with a service brake and a holding brake system with the holding brake. The holding brake system has spring brake cylinders. The service brake system includes a service brake control unit. The electropneumatic braking system includes at least one brake circuit for the service brake and the holding brake. The service and holding brakes may be in separate brake circuits. The spring brake cylinders can be vented when a supply pressure in at least one brake circuit for the service brake decreases. The method includes reducing, via the service brake control unit, the supply pressure in at least one brake circuit for the service brake under a program control in defined conditions.

A method for actuating a mechanism in a brake booster unit. The method includes: ascertaining, using a control unit of a vehicle system, whether a driver's braking request has ended or whether there is no driver's braking request; detecting, using the control unit, an operational disruption of the brake booster unit; detecting, using the control unit, an operational disruption of a pressure controller, which is connected to the brake booster unit and configured to generate a braking pressure and/or a resetting pressure at a master brake cylinder unit of the brake booster unit; generating, using the vehicle system, a predetermined minimum pressure in the master brake cylinder unit and thereby resetting the mechanism and, by the mechanism, resetting a master brake cylinder into a neutral position.

A method for generating a target value of a position of an actuator of a brake of a wheel of a motor vehicle is disclosed. Values of another wheel are used and as a result a correction value which corrects a starting value is determined. As a result, a force sensor system on the wheel can be omitted. Further an associated method for controlling an actuator of a brake of a wheel of a motor vehicle and an associated control device are disclosed.

A vehicle control system is disclosed for modifying vehicle operation and includes an engine control unit having at least one processor. A vehicle network is provided as well as a first handheld wireless device having a GPS module, a local wireless communication module, and a distance wireless communication module. A gauge has a wireless communication module operable to communicate with the first handheld wireless device and at least one display for communicating information to a user regarding vehicle operating parameters. Memory accessible by the processor and memory having software stored thereon are provided, the software being configured for execution by the processor and including instructions for providing a boundary map within which the vehicle may operate under normal operating conditions. The vehicle is placed in a degraded operating mode if the vehicle moves outside of the boundary.