399results about "ABS control systems" patented technology

The embodiment of the invention provides a rail train brake control system and relates to the field of rail transit. The rail train brake control system comprising a single brake control unit, a wholetrain brake control unit, a traction control unit and a communication control unit is characterized in that the single brake control unit is arranged in each carriage of a rail train; the whole trainbrake unit and the communication control unit are arranged in the carriages located on both ends of the rail train; the traction control unit is arranged in power cars of multiple carriages; the single brake control unit, the whole train brake control unit, the traction control unit and the communication control unit realize communication through gateway. Further provided is a train comprising the above-mentioned system. The rail train brake control system has the advantage of realizing flexible grouping of the train with each carriage provided with the single brake control unit to apply airbraking force, each power car provided with the traction control unit to apply electric braking force, and the whole train brake control unit adopted to conduct centralized control.

The present invention integrates the in-car traffic light system of Elsheemy with the vehicle's automatic braking system to significantly reduce running red lights which causes outrageous accidents rates, injuries rates, death rates and damage rates at intersections, the present invention also provides a virtual preemption system integrated with the in-car traffic light system for both emergency vehicles and also civilians vehicles.

The invention discloses a regenerative braking system based on ESC hardware. The system comprises a brake pedal unit, a vacuum booster unit, a brake master cylinder unit, a hydraulic execution unit, four wheel cylinders, four wheel speed sensors, an ESC control unit, a vehicle control unit, a motor control unit and a battery control unit. The brake pedal feeling the same as that of a traditional hydraulic braking system can be guaranteed, no brake pedal travel simulator needs to be additionally mounted, when the ESC hardware fails, backup braking the same as that of the traditional hydraulic braking system can be provided, and the braking safety is guaranteed. Regenerative braking is finished through a drive motor, the hydraulic execution unit is used for finishing hydraulic braking, and a braking scheme which is low in cost and easy to implement and integrates regenerative braking and ESC is provided.

The invention relates to the field of vehicle engineering and discloses an electric power-assisted braking system with composite functions. The electric power-assisted braking system comprises a brake pedal displacement sensor, a brake pedal, a pedal travel simulator, an electric power-assisted assembly, a main cylinder, a wheel cylinder, a hydraulic control unit, a liquid storage tank, a motor, a deceleration and torque increment mechanism, an electronic control unit, a normally open electromagnetic valve, a normally closed electromagnetic valve and a vehicle-mounted other sensor. By designing the pedal travel simulator, decoupling of friction braking force and regenerated braking force can be achieved, and continuous variable crural feeling is provided; a motor assisting device, a brake anti-lock system and the hydraulic control unit can be integrated, and an active braking function is achieved; and no interference exits between motor input and driver input, active braking can be achieved through the motor, and the electric power-assisted braking system can serve as a brake actuating mechanism of intelligent automobiles and unmanned automobiles.

A brake system has a wheel brake and is operable under a non-failure normal braking mode and a manual push-through mode. The system includes a master cylinder operable by a brake pedal during a manual push-through mode to provide fluid flow at an output for actuating the wheel brake. A first source of pressurized fluid provides fluid pressure for actuating the wheel brake under a normal braking mode. A secondary brake module includes a plunger assembly for generating brake actuating pressure for actuating the wheel brake under the manual push-through mode.

The invention discloses an anti-lock braking system as well as a control method and a control device thereof. The method comprises the steps of controlling working states of wheel hub motors according to an SOC signal of a battery and wheel speed signals of various wheels, distributing total target braking torque of various wheels according to different working states of the wheel hub motors, transmitting the distributed total target braking torque of various wheels to corresponding slave braking controllers and controlling output torque of corresponding motors by the corresponding slave braking controllers according to the distributed total target braking torque, wherein each slave braking controller comprises a first slave braking controller and a second slave braking controller; each first slave braking controller controls the output torque of a corresponding electromechanical brake according to the distributed total target braking torque; each second slave braking controller controls the output torque of the corresponding wheel hub motor according to the distributed total target braking torque. By using the method, the response speed and the brake accuracy of the anti-lock braking system can be improved.

An electronic brake system of the present disclosure is disclosed. The an electronic brake system may include a reservoir to store oil: a master cylinder having a master piston connected to a brake pedal and a master chamber for discharging oil by a displacement of the master piston; a hydraulic pressure supply apparatus generating hydraulic pressure by an electrical signal output corresponding to a displacement of the brake pedal to supply to wheel cylinders of the respective wheels; a hydraulic control unit transmitting the hydraulic pressure discharged from the hydraulic pressure supply apparatus to the wheel cylinders of the respective wheels; and a redundancy control apparatus generating hydraulic pressure using a motor and a pump to transmit to at least one of the wheel cylinders.

A brake system, including four hydraulically actuatable wheel brakes. Each wheel brake is assigned in each case one outlet valve which is closed when electrically deenergized. Each wheel brake is assigned in each case one inlet valve which is open when electrically deenergized. The brake system furthermore includes a simulator which is actuatable by a brake pedal, wherein two pressure provision devices are provided for actively building up pressure in the wheel brakes, two brake circuits are hydraulically formed, wherein, in each brake circuit, in each case one pressure provision device is hydraulically connected to two wheel brakes, and wherein two separate on-board electrical systems are provided, and wherein each pressure provision device is fed in each case by one of the two on-board electrical systems.

The invention discloses a wire driven hydraulic parking braking system for a full-wheel steering electric-wheel car. The system comprises an electric hydraulic pump (2), an energy accumulator (4) and a pressure reducing valve (5) which are connected in sequence through a pipeline, wherein the pressure reducing valve (5) is connected with a parking braking valve (6) and a manual parking valve (7) through pipelines respectively, and the parking braking valve (6) and the manual parking valve (7) are connected with a traveling/parking switching valve (10) through pipelines respectively; the traveling/parking switching valve (10) is connected with wheel brakes (18) of a front wheel and a rear wheel through pipelines respectively. The system further comprises a parking braking switch (8) and a parking braking electronic control unit (9), wherein the parking braking switch (8) and the parking braking electronic control unit (9) are connected, and the parking braking electronic control unit (9) is used for acquiring sensor information and controlling electric execution components. A wire driven hydraulic parking scheme is adopted to be adapted to the characteristic of independent steering of wheels; parking pressure increase, parking pressure maintaining and parking pressure relief are controlled by the wire driven electromagnetic hydraulic valve, and response is quick; parking brake fluid pressure is generated through cooperation of the electric hydraulic pump, the energy accumulator and a pressure regulating valve, and braking force can be adjusted flexibly; by the adoption of the system, the ABS function and the ESP function can be integrated.

The invention provides a full-hydraulic ABS braking system based on hybrid power and a control method for braking energy recycling. The system comprises energy storage devices, a liquid charging valve, an electronic pedal, proportioning valves and a braking controller. The energy storage devices are connected with the liquid charging valve through pipelines. Pressure sensors are arranged on the pipelines. The proportioning valves are connected with the pipeline between the energy storage devices and the liquid charging valve. The electronic pedal is connected with the braking controller which is connected with the proportioning valves and wheel edge brakes. The objectives of the invention are to achieve the ABS function and braking energy recycling while adopting a novel hydraulic driving braking system. A traditional hydraulic booster is replaced, so a double-loop function is achieved, space occupation of the system is reduced and response time of the braking system of the whole vehicle is extended.

In a method for controlling a proportional solenoid valve in a hydraulic system, a model of the hydraulic system is formed, control cycles are predefined, and an estimate is made of the pressure prevailing in the hydraulic system at the end of the control cycle and of the coil current applied to the coil of the solenoid valve based on the variables prevailing at the start of the control cycle, the physical parameters of components of the hydraulic system, and the temperature of the hydraulic fluid.

A system for a vehicle (13) having a driver's cabin (15) and a rearward extending portion (14) that is pivotable with respect to the driver's cabin (15), for capturing a rear part (17) of the rearward extending portion (14), the system having at least two wheel sensors (2, 3) located on opposite ends of an axis (18, 19) of the rearward extending portion (14), for acquiring information on a rotational movement of wheels attached to the ends of the axis (18, 19), and a control unit (4) connected with the wheel sensors (2, 3), which control unit determines the rear part (17) of the rearward extending portion (14) based on the acquired information on the rotational movement of the wheels.

The invention provides a vehicle antiskid control system based on datum combination. The vehicle antiskid control system comprises at least one acceleration sensor and an angular velocity sensor which are fixed to a vehicle body. According to the control system, by using the geometrical relation between the sensors and wheels, an approximate acceleration value A2 over the ground near the wheel landing places is calculated based on the mechanics principle, and the relation of the acceleration value A2 and an acceleration value A1 of the actual circumference velocity of the wheels near the landing places is used to control and drive the torque output of the wheels, so that all the wheels have a good antiskid control effect in any state.

The invention relates to an automotive anti-lock braking system (ABS) technology, in particular to an anti-lock braking device of a steering drive axle hub brake and an ABS anti-lock braking structure for a steering drive front axle with a hub brake.The anti-lock braking device is structurally characterized by further comprising a gear ring and a wheel speed sensor, the gear ring is a cylindrical gear rotor installed on a peripheral face of one side end, provided with an oil seal and a spacer bush, of a hub, the internal diameter of the cylindrical gear rotor is in interface fit with the external diameter of the hub, and the cylindrical gear rotor is installed on the hub in a pressing mode; the wheel speed sensor is installed on the inner side face of a brake bottom plate and is parallel to the center axis of the hub, the sensing end of the wheel speed sensor is of a flat head structure distributed parallel to a gear crest of the cylindrical gear rotor.The anti-lock braking device has the advantages that the infinite space is fully utilized without affecting the assembly intensity, the steering drive front axle ABS anti-lock braking device is realized; the interval precision of the sensor and the cylindrical gear rotor is accurate and does not need to be adjusted; the flat head wheel speed sensor is more sensitive in sensing.

To provide an ABS control system and software with an automatic parameter calibration function. An ABS control system according to the present invention includes an electronic control unit (ECU), a wheel speed sensor, and a brake pressure sensor. The wheel speed sensor and the brake pressure sensor measure wheel speed and brake pressure during ABS braking, and the ABS control system automatically calibrates an internal parameter used in ABS control in response to the wheel speed and brake pressure measurement results.

A method and device for operating a wheel slip control apparatus, including determining wheel speeds of wheels compensated with respect to wheel speed differences during a turn as input variables for the wheel slip control apparatus, with which a) a neutral steering, understeering or oversteering driving condition of the vehicle is determined from the driving behavior during a turn, b) depending on the determined condition of the vehicle, either the reference or actual yaw rate is used to calculate a turn radius related to a selected point on the vehicle, c) wheel-related turn radii for at least some wheels are determined from the turn radius related to the selected point, d) reference factors are determined from the wheel-related turn radii and a common reference turn radius for at least some wheels, and e) the compensated wheel speeds are each determined from the reference factors and measured wheel speeds for at least some wheels, and f) the compensated wheel speeds are used as input variables for a wheel slip control apparatus.

The invention relates to an electronically controlled pneumatic braking system (100) comprising at least one braking circuit (A, B) with which at least one control valve (13, 11) for adjusting brakingpressures (p1, p2, p3, p4) is associated, the at least one control valve (13, 11) being controllable electronically in accordance with a control signal (SA, SB) and pneumatically in accordance with acontrol pressure (pA, pB). According to the invention, a second brake valve (25) is provided in addition to a first brake valve (24), the second brake valve (25) being able to output a pneumatic second brake valve control pressure (pA2, pB2) in an electronically controlled manner. The first brake valve (24) can, in addition to an actuation signal (S1), pneumatically output a first brake valve control pressure (pA1, pB1). The two brake valves (24, 25) are disposed in the pneumatic braking system (100) in such a way that the first brake valve control pressure (pA1, pB1) of the first brake valve(24) and/or the second brake valve control pressure (pA2, pB2) of the second brake valve (25) is/are output as the control pressure (pA, pB) to the at least one control valve (13, 11) in order for the at least one control valve (13, 11) to be pneumatically controlled, and the second brake valve (25) can be electronically controlled when the at least one control valve (11, 13) is prevented from being electrically controlled, such that an electronically-pneumatically controlled redundancy is created.

The invention provides a hill starting system. The hill starting system comprises a two-position three-way electromagnetic valve, a load sensing valve, an ABS valve, a gearbox controller and a hill starting switch. An air inlet of the two-position three-way electromagnetic valve is sequentially communicated with an air outlet of an air compressor through a foot valve, an air cylinder, a four-protection valve and a drier, an exhaust port of the two-position three-way electromagnetic valve is communicated with an air inlet of the ABS valve through the load sensing valve, the two-position three-way electromagnetic valve and the ABS valve are in signal connection with a hill starting controller, and the gearbox controller is in signal connection with the hill starting controller, the hill starting switch and an engine. During use, firstly the hill starting switch is pressed, a manual valve is switched off, an accelerator is trodden, the hill starting controller automatically controls the engagement depth of a clutch and coordinates the output torque of the engine according to hill resistance, currently needing to be overcome, obtained through calculation, and a vehicle is made to be started smoothly. By means of the design, the structure is simplified, the starting response speed is increased, and integrated control of a brake, the clutch and the engine is achieved.

A composite cable includes a first twisted-pair wire formed by twisting a pair of first electric wires, a second twisted-pair wire formed by twisting a pair of second electric wires, a pair of third electric wires arranged between the first and second twisted-pair wires in a circumferential direction, each third electric wire having a larger outer diameter than the first and second electric wires, and a tape member spirally wound around an assembled article that is formed by twisting the first twisted-pair wire, the second twisted-pair wire and the pair of third electric wires together. The two twisted-pair wires have the same twist direction, the twist direction of the two twisted-pair wires is different from a twist direction of the assembled article, and the twist direction of the assembled article is different from a winding direction of the tape member.

A method for determining a value of a brake pressure modulated by a pneumatic channel of a braking value encoder having at least one electrical channel, in a braking device of a vehicle, including: (a) a first characteristic curve, in which the dependence of the signals, modulated by the at least one electrical sensor, on the degree of activation of the braking value encoder is represented, is determined and stored; (b) a second characteristic curve, in which the dependence of the brake pressure values, modulated by the channel, on the electrical signals detected by the sensor is represented, is determined and stored; and (c) the brake pressure value corresponding to a specific braking request as a result of activation of the encoder is determined based on the first and second characteristic curves.

The invention discloses a braking energy recovery system. The system comprises an ABS controller, a motor controller and a motor, wherein the braking energy recovery system is provided with a pavement recognition module, and a signal input end of the pavement recognition module is connected with a wheel speed signal output signal in the ABS controller; the signal output end of the pavement recognition module is connected with the motor controller. The invention further discloses a control method of the system. Through the adoption of the above technical scheme, a pavement recognition algorithm program module is added to enable the braking energy recovery function to directly quit while recognizing the emergency brake; under the normal brake, the relatively maximum motor braking force is provided according to the pavements with different adhesion coefficients in the premise of preferably guaranteeing the vehicle travelling security, thereby guaranteeing the relatively maximum braking energy recovery rate. The technical scheme provided by the invention is low in cost.

A method for detecting fluid leakage from a pressure-decrease valve in a hydraulic brake system having an ABS device including: a shutoff valve for shutting off supply of a working fluid from a fluid-pressure supply source to a brake device provided for a wheel; the pressure-decrease valve for discharging the working fluid from the brake device; a reservoir for storing the working fluid discharged from the pressure-decrease valve; and a return pump for returning the working fluid stored in the reservoir to a portion between the shutoff valve and the fluid-pressure supply source, the method including the steps of: activating the return pump in a state in which the hydraulic brake system is not in ABS operation, and detecting the fluid leakage from the pressure-decrease valve based on a variation in a pressure of the working fluid in the fluid-pressure supply source caused when the return pump is activated.

A method for electronically controlling a brake unit having two brake systems in an automatically controllable vehicle combination includes inputting a request signal for automatic electronic activation of service brakes in a tractor vehicle brake system of a tractor vehicle and/or a trailer brake system of a trailer of the vehicle combination, wherein an automatically requested vehicle setpoint acceleration and/or an automatically requested vehicle setpoint velocity to be implemented by the respective service brakes are transmitted via the request signal. The method further includes monitoring and checking plausibility of the request signal to establish whether the automatically requested vehicle setpoint acceleration and/or the automatically requested vehicle setpoint velocity are or can be implemented completely or faultlessly by the respective service brakes. The method additionally includes outputting a trailer redundancy control signal at the trailer brake system under certain conditions.