1197 results about "Parking brake" patented technology

The invention provides an electric motor coach whole vehicle OTA upgrading control method based on a BMS and a VCU, a temperature control dynamic threshold value and a multi-sensor weighted scoring algorithm are adopted, the BMS adaptively adjusts an SOC threshold value according to the battery temperature, the VCU synthesizes the vehicle speed, a hand brake and other states to generate upgrading condition evaluation, a user portrait database and a logistic regression model are combined, and the whole vehicle OTA upgrading control method based on the BMS and the VCU is obtained. Differentially pushing popup windows and predicting user cancel behaviors, implementing a block verification and low-temperature delay write-in strategy, dynamically optimizing remaining time display and low-bandwidth mode switching by a VCU, constructing a multi-stage rollback strategy library, automatically selecting a rollback path according to failure reasons, and cooperating with a safe restart mechanism of key state linkage; and in combination with NLP analysis user feedback driving system iteration, the low-temperature environment compatibility, the user interaction experience and the upgrading success rate are effectively improved, and a closed-loop optimized OTA upgrading ecological system is formed.

An apparatus for a brake drum having a drum brake assembly with first and second brake shoes includes a motor and a planetary gear train for receiving torque from the motor and having an output gear. A ball ramp assembly receives torque from the output gear and has ends aligned with the respective first and second brake shoes. The motor is actuatable for lengthening the ball ramp assembly to move the brake shoes and apply braking force to the brake drum. A bi-stable locking mechanism selectively locks the planetary gear train to apply a parking brake to the brake drum.

The utility model relates to the field of hydraulic braking, and discloses a parking braking system and agricultural machinery, the parking braking system comprises a parking brake, a first reversing valve, a second reversing valve and an energy accumulator, a working oil port of the first reversing valve is connected with a rod cavity of a brake cylinder of the parking brake, an oil inlet of the first reversing valve is connected with an oil inlet path, and an oil outlet of the second reversing valve is connected with an oil outlet path; an oil return port of the first reversing valve is connected with an oil return path, in a power-off state, a working oil port of the first reversing valve is communicated with the oil return port, an oil outlet of the second reversing valve is connected with the oil return path, in the power-off state, an oil inlet of the second reversing valve is communicated with the oil outlet, and the energy accumulator is connected with the oil inlet of the second reversing valve. According to the parking braking system, the situation that tires are locked when the agricultural machine loses power accidentally in the running process can be avoided, and meanwhile the agricultural machine can be slowly and stably decelerated till the agricultural machine is stopped and parked.

The invention discloses a redundant braking control method of an automatic driving vehicle and a storage medium, which are applied to a vehicle control unit. According to the method, when it is detected that an automatic driving module, anti-collision early warning or remote monitoring triggers a braking demand, the target deceleration is calculated in combination with the vehicle speed and the obstacle distance. By collecting the actual acceleration, the parking air chamber air pressure and the motor torque, the total braking force is estimated, the electronic parking braking force is separated out, and then the road adhesion coefficient is calculated. And in the redundant braking mode, according to the target deceleration, the attachment condition and the capacity upper limit of the two systems, performance indexes including deceleration deviation and a parking penalty term are constructed, and the target motor deceleration and the target electronic parking deceleration are obtained through joint distribution. And finally, the target parking deceleration is converted into target air pressure through the deceleration air pressure mapping table containing the online correction amount, the air pressure is adjusted through closed-loop control, and accurate and stable redundant service braking is achieved.

The utility model discloses a double-cylinder EPB (electronic parking brake). The brake comprises a driving mechanism assembly, a shell assembly, a transmission mechanism assembly, a friction plate assembly and a bracket assembly, the driving mechanism assembly comprises a motor and a reduction gear box, and the driving mechanism assembly outputs motor torque through two output ends; the shell assembly serves as an external structure of the brake and accommodates and fixes internal mechanical components. The transmission mechanism assembly comprises two transmission mechanisms which convert motor torque output by the two output ends of the driving mechanism assembly into axial motion to drive a piston to move. The friction plate assemblies comprise an inner friction plate assembly and an outer friction plate assembly which are driven by the piston to clamp the brake disc; the support assembly is connected with the shell assembly through bolts, fixes and supports the brake, and guides and limits path movement of a piston and a friction plate in the braking process.

A vehicle system, for a vehicle that implements a car wash mode, includes a shifter configured to move the vehicle between Park, Reverse, Neutral, and Drive (PRND) positions, an ignition button, and a brake system including a parking brake. A controller is programmed to determine the shifter has been moved to the Neutral position, determine the ignition button has been pressed a predetermined number of times within a predetermined time, determine a grade of the vehicle is below a predetermined threshold grade indicating a substantially flat surface, determine a speed of the vehicle is below a predetermined car wash speed, and initiate a car wash mode based on the shifter being in the Neutral position, the ignition button being pressed the predetermined number of times, the determined grade being below the predetermined threshold grade, and the determined speed being below the predetermined car wash speed.

The invention relates to the technical field of braking systems, in particular to an intelligent dormancy control method of an electronic parking braking system. The method comprises the following steps: judging whether wakeup duration exceeds 5s or not, and if so, considering that the wakeup is in a current wakeup cycle; otherwise, entering new wake-up cycle initialization; whether the calipers have new actions or not is judged, and if yes, the parking state continues to be judged; otherwise, dormancy is performed after 5s; whether the state of the calipers is clamping or releasing is judged, and if the state is clamping, the calipers enter a dormancy state after further calculation; otherwise, dormancy is performed after 5s; judging whether the previous cycle is normally powered off or not, if so, judging the parking state and implementing the strategy according to the gradient priority until the parking state is dormant; otherwise, the parking state is judged after the gradient and the temperature are set to be default values; whether the state of the calipers is clamping or releasing is judged, and if the state is clamping, the calipers enter a dormancy state after further calculation; otherwise, dormancy is performed after 5s. Compared with the prior art, the method has the advantages that safe parking of the vehicle can be guaranteed, power consumption of the vehicle is reduced, and safety and economical efficiency of the vehicle are improved.

A computer system has processing circuitry to control an electrically controllable release bolt of a parking brake actuator of a vehicle is provided. The electrically controllable release bolt adjusts a compression of a parking brake spring of the parking brake actuator. The processing circuitry is configured to determine an activation state for the electrically controllable release bolt based on a pressure status of an air-pressure supply of the parking brake actuator and / or based on a input. When the electrically controllable release bolt is active and in response to detecting a parking brake request or parking brake release request, the processing circuitry is configured to control or to adjust the electrically controllable release bolt to adjust a compression of the parking brake spring based on the detected parking brake request or parking brake release request.

The invention discloses a driving and braking integrated electric wheel system applying high-integration double electronic mechanical clutches. The transmission is mainly composed of a driving motor, a transmission shell, a hub assembly, a partition plate, a speed change planet row, a speed reduction planet row, a double-electronic mechanical brake and the like. An output shaft of the driving motor is connected with the first sun gear; the first clutch is used for connecting the transmission shell and the first gear ring; the second clutch is used for connecting the first inner planet carrier and the motor output shaft; the speed reduction planet row is used for connecting the first outer planet carrier and the hub assembly; the first clutch and the second clutch are actuated by the same actuating motor. According to the electric wheel system, six working modes of first-gear driving, second-gear driving, first-gear mechanical braking, second-gear mechanical braking, reversing and parking braking can be achieved, and gear shifting control without power interruption can be achieved; meanwhile, mechanical friction braking control can be achieved by reasonably controlling combination and separation of the first clutch and the second clutch, and then a traditional wheel end mechanical brake is completely replaced.

A brake actuator is disclosed for an electromechanical vehicle brake, comprising an electric motor for actuating the vehicle brake, a blocking assembly for selectively rotationally blocking an output shaft of the electric motor for the purposes of implementing a parking brake function. The blocking assembly comprises a blocking module, which is mounted so as to be movable linearly between an arresting position and a release position, and a drive for moving the blocking module. The brake actuator further includes an electronic detection device for detecting the arresting position and / or the release position of the blocking module. Also specified is a method for operating a brake actuator.

A brake system may include a plurality of wheel speed sensors respectively installed in a plurality of wheels of a vehicle, a plurality of hydraulic brake modules related to braking of the plurality of wheels, and a first controller configured to perform braking control on the plurality of hydraulic brake modules in response to at least one of a pedal displacement signal, which corresponds to a movement of a brake pedal, and wheel speed signals outputted from the wheel speed sensors, in which when a failure of the first controller is identified, a second controller, which is provided in a steering system of the vehicle, performs braking control on an electronic parking brake, which is provided in at least one of the plurality of wheels, in response to at least one of an operating signal of an EPB switch, the pedal displacement signal, and the wheel speed signals outputted from the wheel speed sensors.

The invention relates to a driving system for a hybrid tractor, which comprises an engine, a generator, a front motor and a rear motor, and the engine is in transmission connection with a PTO (Power Take Off); the front axle input shaft is in transmission connection with the front motor and the normally-combined clutch input shaft, a normally-combined clutch is arranged on the normally-combined clutch input shaft, a parking brake is arranged on the normally-combined clutch input shaft, and the parking brake is connected with the rear axle. An input shaft of the normally-combined clutch is in transmission connection with a small cone shaft, a mode switching clutch is arranged on the small cone shaft, the small cone shaft is in transmission connection with the input shaft of the normally-combined clutch and a rear motor, and one end of a sun wheel shaft is connected with a rear wheel through a planetary gear mechanism. And a service brake is arranged on the sun wheel shaft. The normally-combined clutch input shaft, the normally-combined clutch and the transmission mechanism are arranged between the front axle and the rear axle, so that the four-wheel braking function is achieved.

A hydraulic system of a windrower includes a hydraulic pressure source of a higher pressure hydraulic fluid and a hydraulic pressure return for receiving lower pressure hydraulic fluid. A parking brake is configured to be released by application of the higher pressure hydraulic fluid. A hydraulic fluid supply line is communicated with the parking brake. An electrically operated hydraulic fluid supply valve communicates the supply line with the hydraulic pressure source or with the hydraulic pressure return. An electrically operated selectable check valve is disposed in the supply line between the supply valve and the parking brake, the check valve being shiftable between a checking position permitting hydraulic fluid flow from the supply valve to the parking brake and preventing hydraulic fluid flow from the parking brake to the supply valve, and an open position communicating the supply valve with the parking brake.

The electromagnet for the EMB parking braking device comprises an electromagnet assembly, a ratchet wheel, a pawl and a pin shaft rolling wheel assembly, the electromagnet assembly comprises a shell and a push rod, the push rod is arranged in the shell in the axial direction, the front end of the push rod is connected with a U-shaped connecting piece, the pin shaft rolling wheel assembly comprises a first pin shaft, and a rolling wheel is arranged on the first pin shaft; the rolling wheel can rotate around the axis of the first pin shaft, a kidney-shaped through hole is formed in the pawl, the first pin shaft penetrates through the kidney-shaped through hole, the rolling wheel is located in the kidney-shaped through hole, the two ends of the first pin shaft are connected to the U-shaped connecting piece, and the rolling wheel can roll in the kidney-shaped through hole in the length direction of the kidney-shaped through hole. The U-shaped connecting piece is hinged to the pawl through the pin shaft rolling wheel assembly. One end of the pawl close to the pin roll roller assembly can be meshed with the ratchet wheel, and the other end is rotationally connected to the shell through a second pin roll. Lateral component force generated by the pawl on the push rod can be eliminated through rotation of the roller, so that deformation of the push rod is avoided, and smooth movement of the pawl is guaranteed.

The invention provides a vehicle braking control method and system and electronic equipment, and relates to the field of vehicle braking control. According to the method, when a hydraulic braking system and a wheel speed sensor fail at the same time, vehicle state information can be obtained through an inertial sensor of a vehicle; and an accurate braking instruction is generated to control the parking brake to carry out emergency braking on the vehicle, so that the potential safety hazard that the parking brake cannot be controlled through an electronic hand brake to carry out emergency braking on the vehicle when a hydraulic braking system and a wheel speed sensor simultaneously fail in the prior art is solved.

A redundant parking brake apparatus is provided for a vehicle having components of a parking brake system. The redundant parking brake apparatus comprises a first parking brake controller arranged to (i) monitor a first signal indicative of a request to apply parking brakes of the vehicle, and (ii) provide one or more control signals to be applied to components of the parking brake system to apply the parking brakes in response to receiving the first signal. The redundant parking brake apparatus also comprises a second parking brake controller arranged to (i) initiate a timer counter in response to receiving the first signal, and (ii) provide one or more control signals to be applied to components of the parking brake system to apply the parking brakes when the timer counter has reached a predetermined count.

A method for actuating a brake arrangement, wherein a pawl defined for locking and unlocking a parking brake functionality of a brake arrangement otherwise embodied as a service brake is used. A method for actuating a brake arrangement comprises rotating a shaft in a first direction with a drive to apply a brake, rotating the shaft in a second direction with the drive to release a brake; and moving a pawl between a first position and a second position along a rectilinear travel distance with one of an actuating device and the drive. In the first position, the pawl is spaced apart from a gearwheel connected to the shaft in a fixed rotation ratio and in the second position, is in engagement with the gearwheel or can be brought into engagement by rotation of the shaft in the second direction.

A vehicle system, for a vehicle that implements a car wash mode, includes a shifter configured to move the vehicle between Park, Reverse, Neutral, and Drive (PRND) positions, a propulsion system, an instrument panel cluster including a human machine interface (HMI), a brake system including a parking brake. A controller is programmed to determine the shifter is not in the Park position, display, via the HMI, an option to initiate a car wash mode if the following conditions are met: (i) a grade of the vehicle is below a predetermined threshold grade indicating a substantially flat surface, and (ii) a speed of the vehicle is below a predetermined car wash speed, and subsequently initiate the car wash mode if a user selects, via the HMI, the option to initiate the car wash mode.

A drive axle assembly includes a drive motor, a main reduction axle, a parking brake caliper, and a parking brake disc. The main reduction axle is connected to the drive motor and wheels of a vehicle, the main reduction axle includes an intermediate shaft and an intermediate gear, the intermediate shaft is coupled with the intermediate shaft, and an output shaft of the drive motor is coupled with the intermediate gear. The parking brake caliper includes an accommodating space. A part of the parking brake disc is located in the accommodating space, and the parking brake disc is connected to the intermediate shaft.

Disclosed is an elevator system, having: a car mover for moving an elevator car along a drive track in a hoistway, the car mover having: motor controlled wheels, wherein the car mover is configured to control the motor controlled wheels to move along the drive track; and a parking brake, operationally connected to the car mover and / or elevator car and operationally separate from the motor controlled wheels, wherein the car mover is configured to control the parking brake to move between a deployed state and a retracted state, wherein in the deployed state, the parking brake engages the drive track at a location that is spaced apart from the motor controlled wheels to park the car mover and / or elevator car along the hoistway, and in the retracted state, the parking brake is spaced apart from the drive track.

The invention discloses parking release equipment and a parking release method of an electronic parking brake system. The system comprises a main control module, a parking release module and a parking release module, the main control module is electrically connected with the relay module through the H-bridge module, the relay module is electrically connected with the parking motor, and the H-bridge module performs rotation control on the parking motor; the main control module is also directly and electrically connected with the relay module to execute start-stop control; an over-current detection module is electrically connected between the main control module and the H-bridge module and between the main control module and the relay module; the power management module takes power from the vehicle-mounted storage battery or the cigarette lighter interface; the input module is electrically connected with the main control module for inputting a control instruction. Therefore, when the electronic parking brake system is locked due to a fault, one end of the electronic parking brake system is directly powered from a vehicle-mounted storage battery or a cigar lighter interface of the vehicle, and the other end of the electronic parking brake system is connected into the parking motor to supply power to execute driving control, so that the motor controllably rotates forwards / reversely / stops, the parking state can be relieved without intervention of a vehicle machine, external equipment is not needed, and meanwhile, the parking motor is not damaged.

The invention discloses a parking braking method, a parking braking system and a computer readable medium, and the parking braking method comprises the steps: obtaining state signals representing driver behaviors, including a braking state signal, a gear state signal, an engine state signal and a vehicle speed signal; judging whether the vehicle meets static parking conditions or not according to the state signal, wherein the static parking conditions comprise brake release, N gear, engine flameout and 0 current vehicle speed; when the vehicle meets the static parking condition, whether the EPB is activated within set time or not is judged; if yes, the vehicle is controlled to execute current parking operation; if not, the EPB is automatically activated, and the engine starting circuit is cut off. Parking braking is carried out based on the driver operation behavior sequence, the states of the driver operation behaviors are judged step by step, whether the driver is in the parking forgetting state or not is recognized, then the early warning strategy and the parking strategy are intelligently adjusted, the degradation processing strategy is supplemented in the operation behavior sequence, and mistaken parking and parking forgetting are effectively avoided.

The disclosure relates to a method for operating an electropneumatic parking brake module for an electronically controllable pneumatic brake system for a vehicle, in particular a commercial vehicle, having a supply port for receiving a supply pressure, at least one parking brake port for the connection of at least one parking brake cylinder, a main valve assembly which receives the supply pressure and is configured to output a spring brake pressure at the parking brake port in dependence on a control pressure, and a pilot valve assembly which receives the supply pressure and is to provide the control pressure, wherein the pilot valve assembly has a bistable valve which can be switched between a first air admission position and a second air release position, and a control unit for providing first and second switch signals to the pilot valve assembly.

A brake control system for a vehicle includes electropneumatic modules that control fluid pressure to brake actuators for wheel brakes to apply and release service and parking brakes. A parking brake controller (i) determines whether the parking brake is in an applied state or a released state, (ii) whether a speed of the vehicle meets a predetermined condition relative to a predetermined speed and (iii) whether a command to move the service brake to an applied state has been issued by a service brake controller. When conditions (i), (ii) and (iii) are present, the controller identifies an absence of communication on a communications bus indicative of a failure in the service brake controller and / or the communications bus and thereafter generates a control signal configured to cause to move the parking brake from the released state to an applied state.

A safety system for a towing vehicle and a towed object including a towing vehicle coupling, a towed vehicle connection point that is engageable with the towing vehicle coupling, a coupling lock that is movable between a locked and unlocked positions, a lock sensor that is operative to detect whether the coupling lock is in the locked or unlocked position, a brake system that is moveable between a brake system engaged position and a brake system disengaged position, a controller, wherein the controller is in operative connection with the lock sensor and the brake system, and wherein the controller is operative to receive signals from the lock sensor, wherein in response to a signal from the lock sensor indicating the coupling lock is in the locked position, the controller is operative to enable the brake system to be in the disengaged position through manipulation of manual parking brake valve.

Implementations of a drum to disc brake adapter may comprise a first plurality of mounting lobes surrounding a central opening, the first plurality of mounting lobes located in a first plane on a first side of the adapter and a second plurality of mounting lobes surrounding the central opening, the second plurality of mounting lobes located in a second plane on a second side of the adapter, the second plane parallel to the first plane. The first plurality of mounting lobes is configured to interface with an axle housing and the second plurality of mounting lobes is configured to interface with a disc brake assembly. Each mounting lobe of the first and second pluralities of mounting lobes comprises an opening therethrough. The adapter is configured to preserve use of the emergency or parking brake of a vehicle.

According to an aspect, there is provided an elevator parking brake comprising brake pads configured to provide a braking force against a guide rail in a loading and unloading situation of an elevator car; and at least one sensor. The elevator parking brake is configured to allow a predetermined amount of movement within the elevator parking brake in the loading and unloading situation of the elevator car, and the at least one sensor is configured to provide at least one indication associated with the movement within the elevator parking brake in the loading and unloading situation of the elevator car.

A method of controlling an electro-mechanical brake device, includes: switching a central electronic control unit (ECU) to an awake mode based on a wake-up signal; transmitting a signal such that a wheel ECU is switched from a sleep mode to the awake mode; when a braking input is detected, supplying a current to a motor mounted on an electro-mechanical brake (EMB) using current control to generate a braking force; when a parking braking force is less than a required braking force, controlling the wheel ECU to release the parking braking force and generate the required braking force, and when the parking braking force is greater than or equal to the required braking force, releasing the parking braking force and maintaining the braking force generated in a wheel; when the braking force reaches the required braking force or the braking force is maintained, switching the current control to position control.

The utility model relates to the field of brake chambers, in particular to a novel Y-shaped sealing ring piston type brake chamber which comprises a service brake chamber and a parking brake chamber, the parking brake chamber is provided with a piston and a piston rod, the piston is arranged in the parking brake chamber in a sliding mode, the piston rod is connected to the left side of the piston, and the Y-shaped sealing ring is arranged on the right side of the piston. A first groove is annularly formed in the outer portion of the right side of the piston, a Y-shaped sealing ring is arranged in the first groove, a sealing lip of the Y-shaped sealing ring is arranged in the mode that the outside is low and the inside is high, a second groove located at the right end of the first groove is annularly formed in the piston, and a sealing ring is arranged in the second groove. According to the design that the lips of the Y-shaped sealing ring on the outer side of the piston of the parking braking air chamber are low outside and high inside, stress distribution is changed, the lips on the inner side are tightly attached to the wall of the air chamber under pressure, inward turning deformation caused by uneven stress is reduced, and the service life of the sealing ring is prolonged.

A brake actuator is described, in particular for an electromechanical vehicle brake (10), comprising an electric motor (28) for actuating the vehicle brake (10), a locking assembly (38) for selectively rotating a drive shaft (40) of the electric motor (28) to form a parking brake function, wherein the locking assembly (38) comprises a locking module (42) mounted to be linearly displaceable between a locking position and a release position, and a drive (44) for displacing the locking module (42), and an electronic detection device (86) for detecting the locking position and / or the release position of the locking module (42). Furthermore, a method for operating a brake actuator (12) is described.