2826 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 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.

A system for controlling the braking system of a towed vehicle being towed by a towing vehicle having a towing vehicle subsystem for the towing vehicle and a towed vehicle subsystem for the towed vehicle. The towing vehicle subsystem includes a towing vehicle control mechanism having a brakes-on indicator and a towing vehicle receiver mechanism for receiving wireless modulated digital signals. The towed vehicle subsystem for a towed vehicle includes a towed vehicle control mechanism, a linkage mechanism connecting the towed vehicle control mechanism to the braking system of the towed vehicle, a sensing mechanism for sensing activation of the braking system of the towed vehicle, and a towed vehicle transmitter mechanism for transmitting wireless modulated digital signals to the towing vehicle transmitter mechanism, wherein actuation of the towing vehicle control mechanism by an operator of the towing vehicle actuates the towed vehicle control mechanism causing the linkage mechanism to actuate the braking system of the towed vehicle and wherein the sensing mechanism, upon sensing actuation of the braking system of the towed vehicle, causes the towed vehicle transmitter mechanism to wirelessly transmit modulated digital signals to the towing vehicle receiver mechanism which, in conjunction with the towing vehicle control mechanism, causes the display device to indicate that the braking system of the towed vehicle has been actuated. A modified embodiment further includes a towing vehicle transmitter mechanism and a towed vehicle receiver mechanism for wirelessly actuating the braking system of the towed vehicle without actuating the braking system of the towing vehicle.

Improved methods and systems for controlling hydraulically or electrically actuated anti-lock brake systems (ABS) on air and land vehicles requiring only measurement of wheel angular speed although brake torque measurements can also be employed if available. A sliding mode observer (SMO) based estimate of net or different wheel torque (road/tire torque minus applied brake torque) derived from the measured wheel speed is compared to a threshold differential wheel torque derived as a function of a “skid signal” also based on wheel speed only to generate a braking control signal. The braking control signal can be employed to rapidly and fully applying and releasing the brakes in a binary on-off manner and, as an additional option, possibly modulating the maximum available brake hydraulic pressure or electrical current when the brakes are in the “on” state in a continuous manner. In the case of the basic on-off component of braking, the brakes are released when the estimate of differential wheel torque is less than the threshold differential wheel torque (i.e. for relatively high values of brake torque), and the brakes are applied fully when the estimate of differential wheel torque is greater than or equal to the threshold differential wheel torque. For aircraft landing gear applications, a fore-aft accelerometer mounted on the landing gear can be used to suppress nonlinear gear displacement oscillations commonly called gear walk in the direction of wheel roll.

A motor vehicle side collision avoidance system for avoiding collisions with objects. The system includes a direction sensor generating a direction signal corresponding a direction of motion of the vehicle, an external detector generating a detector signal corresponding to a location of objects outside of the vehicle, and a braking control system including at least two independently operable braking devices coupled to respective wheels. A processor is coupled to the direction sensor, the external detector, and the braking control system. The processor receives the direction and detector signals and is configured to send an avoidance signal to the braking control system based on the direction and detector signals. Upon receipt of the avoidance signal, the braking control system activates appropriate braking devices to avoid collision with the objects.

An improved electronic braking system for walkers that incorporates one or more electrically-operated brakes controlled by an electronic controller is disclosed. The controller is responsive to touch-sensitive switches for easy operation, and is adjustable and responsive to operator patterns of use to provide individualized control of the brake operation. The controller may also be responsive to environmental conditions such as the slope of the ground over which the walker is moving, to its rate of motion, or to the distance between the walker frame and the user, and may be adjusted to accommodate for the weight of the user or to set limits to the speed at which it can move.

An elevator installation has braking equipment for braking and holding an elevator car which moves in vertical direction within guide tracks or rails. The braking equipment consists of at least two brake units each comprising a normal force regulation device that sets a normal force (F_N) in correspondence with a normal force value determined by a brake control unit and/or a locking device that locks the brake unit in a set braking position and which preferably maintains the set braking position in the case of an interrupted energy supply. The braking equipment provides a gentle braking or holding of the elevator car, which corresponds with the operational state of the elevator installation, with a low energy requirement.

A brake control apparatus of an automotive vehicle employs a pump incorporated in a hydraulic actuator, a separate pressure control valve disposed between the pump and each individual wheel-brake cylinder and having an orifice having a predetermined orifice-constriction flow passage area, and vehicle sensors including at least wheel cylinder pressure sensors. Also provided is a controller configured to be connected to the vehicle sensors and the hydraulic actuator, for calculating, based on a driver's manipulated variable, target wheel cylinder pressures, and for controlling the hydraulic actuator responsively to the target wheel cylinder pressures. The controller is further configured for calculating a fluid-pressure deviation between the target wheel cylinder pressure and the actual wheel cylinder pressure, and for stopping working-fluid supply from the pump to the abnormal wheel-brake cylinder having an abnormality in the fluid-pressure deviation exceeding a predetermined threshold value.

The invention relates to a coordinated braking control method of an electric automobile, which comprises the following steps of: 1. setting a coordinated braking control system; 2. when the automobile is under a braking or sliding condition, carrying out analysis processing on a braking command by whole automobile controller in the following conditions: (1) the dynamic coordinated control at the initial period of the common braking of a motor braking system and a hydraulic braking system; (2) the coordinated control giving priority to braking safety, i.e. under the condition of requiring larger braking torque; (3) the coordinated braking control giving priority to braking energy recovery, i.e. small-strength braking; and (4) a dynamic part, wherein the charge state of the battery and the rotating speed of a motor of the electric automobile are synthetically considered, when the charge state of the battery is higher and the battery does not need to be charged, the maximum braking torque provided by the motor is reduced, but the required braking torque is still provided by the motor; and 3. proportionally distributing the analysis results in the steps between the motor braking system and the hydraulic braking system to finally achieve the purpose of carrying out the coordinated braking control on the electric automobile.

Hand-propelled vehicle (10) such as a pram or stroller has electrically-operated brake apparatus (13) which is applied automatically on a user releasing their grip from handle (12). Braking does not occur immediately grip or touch sensors (17) on handle (12) register that the user has released handle (12). Programmable controller (19) is provided which only applies brake (13) if sensors (16) detect movement of vehicle (10) and/or that vehicle (10) has moved more than a set distance subsequent to release of handle (12). Therefore braking apparatus (13) acts as a safety feature that only applies if, say, a vehicle is released on a slope and movement due to the slope is detected.

An electro-pneumatic brake control device is provided for controlling a parking brake of a vehicle having a service brake and a parking brake, the service brake having a brake pedal and pneumatically actuatable brake cylinders operatively connected to the brake pedal for actuating wheel brakes. At least one brake cylinder is a spring brake cylinder with a spring store part for actuating the parking brake. In the event of a failure of the electrical energy supply, the spring store part of the spring brake cylinder is permanently vented by actuating the brake pedal in order to activate the parking brake.

A vehicle suspension system is responsive to an active brake signal from a brake system indicating the application of a greater braking force to one front corner brake than to the other front corner brake to affect vehicle yaw rate. The vehicle suspension system determines the relative velocities of the front corner suspension adjacent the front corner brake receiving the greater braking force and the diagonally opposed rear corner suspension and further determines a compression damping command for the front corner suspension and a rebound damping command for the rear corner suspension. While the active brake signal is present, the suspension control applies the compression damping command for the front corner suspension when its relative velocity indicates that it is in compression. While the active brake signal is present, the suspension control also applies the rebound damping command for the rear corner suspension when its relative indicates that it is in rebound.

The invention relates to an airplane anti-skid brake control system and an airplane anti-skid brake control method. In the airplane anti-skid brake control system, two airplane wheel speed sensors are respectively applied to a left airplane wheel and a right airplane wheel of the airplane and connected with the input end of an electronic anti-skid control box; an electro-hydraulic servo valve is connected with a brake valve, a brake device, the electro-hydraulic servo valve and the electronic anti-skid control box respectively; the input port of the electronic anti-skid control box is connected with the airplane wheel speed sensors; and the output port of the electronic anti-skid control box is connected with the electro-hydraulic servo valve. In the invention, the electronic anti-skid control box judges true and false of the received airplane speed signal by comparing the airplane speed signal to be judged with the speed of the airplane wheels at different time or comparing the speed signals of the two airplane wheels so as to perform anti-skid control according to the speed signals of the airplane wheels which are judged to be true; and the airplane wheel brake pressure is adjusted according to the received instruction through the electro-hydraulic servo valve, so safe and reliable brake of the airplane wheels is realized.

A braking control device performs a steering and/or avoidance possibility determination based on the state of the vehicle to execute automatic vehicle braking when an obstacle in front of the vehicle cannot be avoided by steering and/or braking. The device determines that the obstacle can be avoided by steering when the correlation value between steering avoidance time and relative velocity is smaller than the distance from the vehicle to the obstacle. The steering avoidance time is set to a shorter value when the suspension characteristic is stiffer and the sideways force generated by the front wheels is larger. The steering avoidance time is set successively shorter for low, high, and medium speed travel regions, respectively, to reflect the behavior response characteristic of the vehicle with respect to steering input. The vehicle deceleration that would occur if the driver released the accelerator pedal is considered in the braking avoidance possibility determination.