6207 results about "Brake control" patented technology

An electronic winch monitoring system for a winch having a fixed-ratio gearbox with input and output shafts, a winch drum connected to the output shaft, and an auxiliary brake connected to the output shaft activated by reducing the pressure in a brake release hydraulic circuit. The system comprises an input shaft speed sensor, an output shaft speed sensor, and an electronic control unit having a monitoring section and a brake control section. The monitoring section receives the speed signals, processes them to produce a calculated ratio of actual input to output shaft speeds, and produces a fault indication signal when the value of the difference between the calculated speed ratio and the fixed ratio exceeds a predetermined value. The brake control section, upon receiving the fault signal, reduces the hydraulic pressure in the brake circuit using a nonlinear pressure-time profile to engage the auxiliary brake and stop the winch drum.

A brake control system includes a master cylinder to produce a master cylinder pressure, a brake booster to assist the master cylinder, a first control unit to control the booster, a hydraulic modulator to supply a wheel cylinder pressure to a wheel cylinder, and a second control unit to control the hydraulic modulator. The hydraulic modulator includes a pressure source, such as a pump, to increase the wheel cylinder pressure. The first and second control units are connected together by a communication line. The brake control system may further include a boost condition transmitting section to transmit, through the communicating line, a condition of a boost system formed by the brake booster and the first control unit.

A brake apparatus for a vehicle generally sets an upper limit value of regenerative braking force to the maximum value of the regenerative braking force which can be generated at the present. In the case of a front-wheel-drive vehicle, the total braking force, the sum of front-wheel braking force (front-wheel hydraulic braking force+regenerative braking force) and rear-wheel braking force (rear-wheel hydraulic braking force), is rendered coincident with a target braking force corresponding to a brake pedal depressing force, and the regenerative braking force is set to a largest possible value equal to or less than the upper limit value. As a result, the regenerative braking force can be larger than front-wheel-side target distribution braking force. The upper limit value is decreased from the maximum value by an amount corresponding to the degree of easiness of occurrence of a locking tendency at the driven wheels (front wheels).

An automatic drilling system is disclosed which includes an electric servo motor operatively coupled to a winch brake control, a servo controller operatively coupled to the servo motor, and a drum position encoder rotationally coupled to a winch drum. The controller is adapted to operate the servo motor in response to measurements of position made by the encoder so that a selected rate of rotation of the drum is maintained.

The utility model discloses a system and a method for self-help-settlement shopping in supermarkets, which is characterized in that a wireless network connected with a commodity information server is arranged in supermarkets; a gravity sensor is arranged on a shopping cart and the commodity weight on the shopping cart detected is input to a microprocessor; a bar code reader is connected with the microprocessor and the detected commodity bar code information is input; a reader-writer of payment cards reads and writes the information of a payment card inserted by a customer; a touch screen completes man-machine communication of the customer and the self-help-settlement system; the microprocessor is connected with the wireless network through a wireless transceiver and is connected with an electronic brake through a data interface so as to provide braking control signals; a charging power supply provides power for each part; each commodity is self-scanned by a customer when shopping; the amount of the shopping card is deducted and human intervention supervision is not needed with exact identification; the utility model has the advantages that not only the cost of cash desk construction and checkout employee employment for supermarkets is reduced, but also the slowness of settlement speed and queuing jam of customers are avoided; and the benefit of supermarkets is increased.

A brake apparatus for a vehicle controls braking force acting on front wheels by hydraulic braking force (front-wheel-side vacuum-booster hydraulic pressure fraction+linear-valve differential pressure fraction), which is frictional braking force, and regenerative braking force, and controls braking force acting on rear wheels by hydraulic braking force (rear-wheel-side vacuum-booster hydraulic pressure fraction) only, to thereby perform regeneration-coordinative brake control. During performance of ABS control, the apparatus sets the limit regenerative braking force to a force under which locking of the front wheels does not occur in a case in which the force acts on the front wheels, which are wheels undergoing regenerative braking, and adjusts the regenerative braking force such that the regenerative braking force does not exceed the limit regenerative braking force.

A method includes receiving an input brake command that indicates a desired amount of braking for a vehicle. A brake control signal is then derived from the input brake command to facilitate applying a braking force to a wheel of the vehicle, and the braking force facilitates achieving the desired amount of braking for the vehicle. The method further comprises determining that data from a sensor associated with the wheel is unavailable, and then modifying the brake control signal in response to determining that the data is unavailable. The modification may be based on sensor data or controller output associated with a second wheel where data is available. Such modification facilitates the desired amount of braking for the vehicle.

The invention discloses a no-signal intersection vehicle and vehicle cooperative collision prevention system, which comprises a wireless communication module, a central processing unit, a vehicle running state information collecting module, a driving intention judging module, a man-machine interaction interface, a brake control module and a power supply management module. According to the system, information such as self vehicle position, speed, acceleration and the like are collected by the vehicle running state collecting module, and the self vehicle running state is obtained; the vehicle turning information is collected through the driving intention judging module, and the driving intention of a driver is judged; the self vehicle information is sent out to the periphery by the wireless communication module in a broadcasting way, and the running state information of surrounding vehicles is received; the central processing unit is connected with the vehicle running state information collecting module, the driving intention judging module and the wireless communication module, information of the self vehicle and other vehicles is obtained, the collision judgment and the disposition are carried out, the collision occurrence is judged, the vehicles are controlled to be braked through the brake control module, and early warning signals are given to the driver through the man-machine interaction interface; the man-machine interaction interface can also control the starting and the stop of the system; and the power supply management module provides power supply for each module of the system.

A method for controlling braking of a trailer hitched to a vehicle with a braking control system during a braking event includes the steps of determining vehicle speed, measuring an amount of braking intent applied to the braking control system, determining a first level of braking output, providing the first level of braking output to the trailer if the vehicle speed is greater than a first predetermined threshold, and providing a second level of braking output to the trailer if the vehicle speed is less than the first predetermined threshold and the amount of braking intent has not exceeded a second predetermined threshold during the braking event. The first level of braking output corresponds to a function of the amount of braking intent. The second level of braking output is less than the first level of braking output.

A deceleration control apparatus for controlling a deceleration value of a vehicle, including a plurality of deceleration-value setting devices, a target-deceleration-value control portion operable to change a target deceleration value of the vehicle according to an operation of each of the deceleration-value setting devices, and a brake control portion operable to control a braking force to be applied to the vehicle, according to the target deceleration value changed by the target-deceleration-value control portion, wherein the target-deceleration-value control portion is operable to successively change the target deceleration value of the vehicle in response to successive operations of one and another of the plurality of deceleration-value setting devices such that the target deceleration value changed according to the operation of the above-indicated one deceleration-value setting device is subsequently changed according to the operation of the above-indicated another deceleration-value setting device.

Towed vehicles can be extremely heavy. Accordingly, it is too much of a burden to the braking system of a towing vehicle to not have brakes on the towed vehicle. Controlling the brakes of the towed vehicle must be accurately applied otherwise very dangerous conditions can be created. A method of controlling braking of a towed vehicle is, therefore, needed. The method comprises receiving speed signals based on speed of a towing vehicle, or a towed vehicle, or both said towing vehicle and said towed vehicle, receiving pressure signals based on pressure of a hydraulic brake system of the towing vehicle, and generating a brake output signal based on the speed signals and the pressure signals.

An anti-lock braking system includes a friction torque gradient estimating unit for estimating, from a small number of parameters, the gradient of friction torque with respect to a slip speed, and controls a braking force acting on wheels on the basis of the friction torque gradient estimated by the friction torque gradient estimating unit. The friction torque gradient estimating unit may employ several types of estimating methods; e.g., a method of estimating the gradient of friction torque from only time-series data concerning a wheel speed; a method of estimating the friction torque gradient from time-series data concerning wheel deceleration as well as from braking torque or time-series data concerning physical quantities associated with the braking torque; or a method of estimating the friction torque gradient from micro-gains which are obtained when brake pressure is excited in a very small amount at the resonance frequency of a vibration system comprising a vehicle, wheels, and a road surface and which represent the characteristics of the vibration system. Further, there is also disclosed a method of determining, from the thus-estimated friction torque gradient, the limit of the characteristics of friction torque developed between the wheels and the road surface.

A control system for an automotive vehicle that has a brake system includes an object detection system that generates an object detection signal and an object distance signal. A controller is coupled to the object detection system. The controller generates a brake control signal proportional to the object distance signal in response to the object detection signal and the object distance signal. The controller controls the brake system in response to the brake control signal.

A transportation vehicle configured for riding and walking modes of use includes a support frame having a front end and a rear end; and a plurality of front wheels rotatably coupled to the front end, and a plurality of rear wheels rotatably coupled to the rear end. A seat is coupled to the frame and configured to support a driver. A steering assembly is operably coupled to the front wheels and configured to controllably pivot the front wheels for steering. A braking system is operably configured to stop motion of the vehicle. A rigid walking arm is pivotally coupled to the steering assembly at a pivotally mounted end of the walking arm. Motor operation and braking controls are provided on the walking arm for walking mode and adjacent to the seat for riding mode. A relay disables controls for one mode (e.g., walking mode or riding mode controls) while the other mode is effective. Switching logic for selecting between walking mode and riding mode is also provided. A motor controller receives input from controls, sensors and switches, and governs motor speed and direction in accordance with preset walking mode and riding mode control parameters.

During a self-driving control, when an acquisition failure occurs in traveling environment information acquisition required for performing self-driving, and a failure of a steering system of a vehicle equipped with the vehicle driving control apparatus is detected, a brake controller sets an evacuation course along which the vehicle is to travel safely within traveling environment, based on traveling environment information detected last time before the acquisition failure of the traveling environment information, and executes a deceleration of the vehicle and a yaw brake control that applies a yaw moment to the vehicle based on the evacuation course.

The invention discloses a brake control unit for a railway vehicle. The brake control unit comprises a brake control part and an axle non-rotation detection part which are electrically independent of each other. The brake control part comprises a pneumatic brake control unit, a wheel sliding protection unit, an MVB network communication port and a serial port communication port. The axle non-rotation detection part comprises an axle speed anomaly detection unit, an MVB network communication port and a serial port communication port. The pneumatic brake control unit can conduct brake instruction receiving, brake force calculating, EP current control, EP current lag compensation control and the like. The wheel sliding protection module can conduct sliding and locking detection, sliding prevention and locking prevention control, tread sweeping control and ATC axle sliding state output. The axle speed anomaly detection unit judges whether a certain axle is locked or not or whether the speed of the axle is abnormal or not. The independent axle non-rotation detection part is arranged in the brake control unit, and therefore the working current of a speed sensor can be independently monitored and reported to a vehicle diagnosis device, and the safety level of the brake control unit is increased.

The invention relates to a driving/braking system of an independent four-wheel electric automobile, comprising a working condition detection device, a control device, a drive motor driver and a braking device driver, The working condition detection device respectively detects various working condition signals of the electric automobile; the control device processes and calculates the working condition signals to obtain driving control signals and/or braking control signals which correspond to wheels of the electric automobile; and the drive motor driver and the braking device driver respectively control the output of a drive motor and a braking device which respectively correspond to the wheels of the electric automobile according to the driving control signals and/or the braking control signals. The invention can flexibly and reasonably distribute the driving force and the braking force according to working conditions and realize the initiative safety driving/braking of the independent four-wheel electric automobile.

The invention discloses a tandem regenerative brake control method. The method comprises the following steps of monitoring the intend of a driver and the state of a vehicle by a vehicle control unit VMS, and judging whether to enter a regenerative brake control mode or not; under a regenerative brake control mode, comprehensively considering the states of a battery and a motor by the vehicle control unit VMS, calculating the currently allowable maximal regenerative brake torque, and transmitting the maximal regenerative brake torque to a brake control unit (BCU); and monitoring the brake requirement of the driver by the brake control unit (BCU), in the range allowed by the vehicle control unit VMS, balancing the regenerative brake torque and the conventional hydraulic brake torque, and on the premise of meeting the brake requirement of the driver, preferentially feeding back the regenerative brake torque to optimally reclaim brake energy. The method can be widely applied to the field of regenerative brake control.

The invention relates to a device for preventing faulty operation for using an accelerator as a brake by mistake based on computer vision, which comprises a vision sensor, an embedded system, a vehicle speed measuring unit, a vehicle driving angle measuring unit, a distance measuring unit, a voice alarm unit, an accelerator control unit, a brake control unit and a power supply unit, wherein the embedded system is used for reading the information of driving speed of a vehicle, a vehicle steering wheel angle, a video image of a front road of the vehicle, and the like, estimating a barrier distance on the front road and calculating a driving risk factor and driving risk change tendency according to the barrier distance, the vehicle steering wheel angle and the speed of the vehicle. The invention makes a corresponding driving decision according to the driving risk factor and the driving risk change tendency, controls the voice alarm unit to produce drive warning sound according to the driving decision, controls the accelerator control unit to allow the action effectiveness of stepping the accelerator by a driver and controls the brake control unit to control the automatic brake of the vehicle.