1491 results about "Parking brake" patented technology

The invention belongs to an electromechanical braking system in the technical field of vehicles, and discloses a driving and parking braking torque mutual coupling redundancy electromechanical braking system which comprises a brake assembly, an MGU and shell, a driving braking motor and gear reducing mechanism assembly, a gear system bearing support and an ECU controller assembly. The service braking gear reduction mechanism assembly comprises a service braking first-stage reduction gear train mounting mechanism, a second-stage reduction gear train mounting mechanism and a bearing, and the parking braking gear reduction mechanism assembly comprises a parking first-stage reduction worm and gear mechanism, a second-stage reduction worm and gear mechanism and a mounting bearing. The braking torque of the driving braking and the braking torque of the parking braking are mutually coupled, the two systems can share the braking output gear shaft assembly, the driving braking and the parking braking can be independently operated, and meanwhile the parking braking can assist the driving braking when needed. By means of the design, the safety and reliability of the braking system are improved.

The embodiments presented herein relate to a system and method for integrating electronic parking brake and service brakes to improve performance of spring brake requests at road speed. In one embodiment, a vehicle is provided comprising: a park brake; a service brake, a controller, and a valve. The controller is configured to: receive a request to apply the park brake while the vehicle is moving above a threshold speed; and in response to receiving the request, simultaneously attempt to apply both the parking brake and the service brake. The valve is configured to prevent simultaneous application of both the park brake and the service brake and allow only the service brake to be applied in response to the valve receiving sufficient pneumatic output to apply the service brake. Other embodiments are provided.

The invention discloses a converter body mounting and positioning system and method based on a buggy ladle, and belongs to the technical field of converter mounting and positioning. According to the converter body mounting and positioning system, the position detection device is used for detecting whether position deviation exists on the two sides of the converter body or not in the in-place conveying process and detecting the alignment condition of the converter body and bolt mounting holes in a converter support; when the converter body has installation position deviation, the steel rail on the corresponding side is clamped through the speed reduction clamping device; when the converter body reaches the braking distance, the steel rails on the two sides are clamped at the same time, and simultaneous speed reduction of the single side or the two sides of the buggy ladle is achieved; and after the converter body is in place, the steel rail is clamped and locked through the brake locking device, so that parking brake of the buggy ladle is realized. In the conveying process of the converter, through accurate control and auxiliary braking of the buggy ladle, high-precision automatic in-position of the converter body can be achieved, and the installation efficiency and the installation precision are improved.

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 electrified vehicle includes a human-machine interface to enable a towed vehicle mode to enable electric pumps to lubricate and / or cool vehicle components and to disable driver assistance features while the electrified vehicle is being towed by another vehicle. The electrified vehicle includes a drivetrain having an electric machine configured to provide propulsive torque to vehicle wheels, a high-voltage traction battery selectively connected to the electric machine, a battery powered fluid pump configured to pump fluid to the drivetrain, and a controller programmed to, after receiving a signal enabling towed vehicle operation of the electrified vehicle, control operation of the battery powered fluid pump while the electrified vehicle is being towed. The controller may disable one or more driver assistance features and alerts such as automatic emergency braking, automatic shifting of the drivetrain, automatic parking brake operation, automatic headlights, automatic steering, cruise control, parking assistance, and external object distance detection.

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 invention discloses an unmanned mining dump truck hydraulic braking system and a control method. The unmanned mining dump truck hydraulic braking system comprises a service brake valve set and a parking brake valve set. The service brake valve group comprises a first hydraulic proportional pressure reducing valve, a second hydraulic proportional pressure reducing valve, a first shuttle valve and a first pressure sensor; the first hydraulic proportional pressure reducing valve and the second hydraulic proportional pressure reducing valve are connected in parallel; oil outlets of the first hydraulic proportional pressure reducing valve and the second hydraulic proportional pressure reducing valve are communicated with an oil inlet of a first shuttle valve; an oil outlet of the first shuttle valve is connected with a first pressure sensor; the parking brake valve group comprises an electromagnetic directional valve, a redundant electromagnetic directional valve and a pressure switch; the electromagnetic directional valve is a normally closed valve, and the redundant electromagnetic directional valve is a normally open valve; the electromagnetic directional valve and the redundant electromagnetic directional valve are connected in series, the electromagnetic directional valve is connected with an oil inlet pipeline, the redundant electromagnetic directional valve is connected with an oil outlet pipeline and a parking brake caliper, and a pressure switch is arranged on the oil outlet pipeline.

A electric brake system includes a main device that provides a first hydraulic pressure to a plurality of wheel cylinders respectively installed on a plurality of wheels, based on a position of a brake pedal; and art auxiliary device that provides a second hydraulic pressure to first and second wheel cylinders respectively installed on first and second wheels among the plurality of wheels based on the position of the brake pedal in a state in which the main device does not generate the first hydraulic pressure. The auxiliary device receives power from a power network different from that of the main device, and the auxiliary device controls at least one of first and second parking brakes respectively installed on third and fourth wheels among the plurality of wheels. In such an electric brake system, when the main device fails or is out of control, the auxiliary device may auxiliary generate the hydraulic pressure required for braking and may generate braking force using the parking brake.

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.

An integrated brake fluid charging valve, a hydraulic system and an engineering machine. The integrated brake fluid charging valve comprises: a priority valve, a fluid charging pressure control valve, a first one-way valve, a second one-way valve, a proportional overflow valve and a pressure oil port, a first oil outlet, a second oil outlet, a third oil outlet and an oil return port. The pressure oil port is in fluid connection with the first oil outlet and the second oil outlet by means of the first one-way valve. The fluid charging pressure control valve is arranged between an oil inlet of the first one-way valve and the oil return port, and the priority valve and the proportional overflow valve are arranged in series between the pressure oil port and the oil return port. The second one-way valve is arranged between the priority valve and the third oil outlet. At least part of a hydraulic fluid input through the pressure oil port can be guided to the third oil outlet by means of the priority valve and the second one-way valve, and / or can be guided to the oil return port by means of the priority valve and the proportional overflow valve. The hydraulic system comprising the integrated brake fluid charging valve and the engineering machine are also provided. Integrating functions such as brake accumulator fluid charging, parking brake control and pilot oil supply into one valve block achieves an integrated design, thus reducing the difficulty and complexity of arrangement of hydraulic systems, and reducing system costs.

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 discloses an electric drive assembly and engineering machinery. The electric drive assembly comprises a drive motor assembly and a final transmission assembly. The parking brake is arranged at the first end of a rotating shaft of the driving motor, and the driving motor can achieve dynamic braking during driving. The final transmission assembly comprises a first-stage planet row, a second-stage planet row, a third-stage planet row and a service brake. The second end of a rotating shaft of the driving motor is in transmission connection with a first-stage sun gear of a first-stage planet row and then sequentially drives a second-stage planet row and a third-stage planet row, power is output by a third-stage planet carrier of the third-stage planet row, the third-stage planet carrier is connected with a chain wheel, and the chain wheel is connected with a hub body; a service brake is arranged on the hub body and is used for generating or releasing service braking on the hub body; the service brake is externally connected with a cooling circulation oil way, a friction plate is forcibly cooled, and safety and reliability are improved. The caliper disc type parking brake is placed outside the driving motor, the braking torque is amplified through the three-level large reduction ratio, and the requirement for the braking torque of the caliper disc type parking brake is lowered.

A brake device for a motor vehicle has an expansion unit which is designed to, proceeding from a neutral position, in the one driving direction generate a service brake, and in the other driving direction generate a self-locking of a function of a parking brake. For this purpose, the expansion unit has a nut / spindle unit which optionally interacts with an axial bearing or a friction-fitting coupling unit.

A wet drive axle with built-in parking and service brakes. Two axle housings (2) are respectively mounted on two sides of a motor (1); one end of a motor shaft (11) is connected to a differential (3) rotatably mounted in the axle housing (2), and a parking brake assembly (4) is provided between the other end of the motor shaft (11) and the axle housing (2); the differential (3) separately transmits the power of the motor (1) to sun gear shafts (61) rotatably mounted in the axle housings (2); a service brake assembly (5) for implementing braking is provided between each sun gear shaft (61) and the corresponding axle housing (2); an inner ring gear (69) is fixed in each axle housing (2), a planet carrier (63) is rotatably connected in the axle housing (2), planet gears (62) are mounted on the planet carrier (63), the planet gears (62) are located in the inner ring gear (69) and are engaged with the inner ring gear (69), and one end of each sun gear shaft (61) is inserted among multiple planet gears (62) and is engaged with the multiple planet gears (62). The position arrangement of a brake structure in a drive axle improves the compactness of internal structure arrangement, making the drive axle smaller.

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.

The invention discloses a locking mechanism, a parking brake locking device and a vehicle, the locking mechanism comprises an electromagnet shell, a push rod shaft, a static iron core, a movable iron core and an electromagnet coil winding, the static iron core and the movable iron core are arranged in the electromagnet shell, the electromagnet coil winding is arranged around the iron cores, and the push rod shaft is of a telescopic integral rod shaft structure connected with the movable iron core; and a locking part which is matched with a locking groove in the transmission gear for locking and unlocking is formed at the end part of the transmission gear. The push rod shaft is of the integrated shaft structure integrated with the locking part, the risk of the connection strength of the locking part structure and the push rod is eliminated through the integrated structure, and the number of parts is reduced. And an anti-rotation structure is integrated with the push rod and the static iron core, so that the functions of parts are realized, an additional anti-rotation structure can be omitted, the product design is more compact, the assembly is simple and convenient, and the weight and the manufacturing cost are reduced.

Provided are a vehicle control method and system, and a vehicle and a storage medium. The vehicle control method comprises: in response to the fact that a vehicle enables a comfort stop function, acquiring a longitudinal acceleration and a requested braking force of the vehicle; on the basis of the longitudinal acceleration, determining a parking braking force of the vehicle; in response to the fact that the parking braking force is greater than the requested braking force, acquiring a current vehicle speed; and in response to the fact that the current vehicle speed is less than a first preset vehicle speed threshold value, outputting a first control signal to control the vehicle, wherein the first control signal is used for controlling a hydraulic braking force of the vehicle to ramp down according to a preset slope and controlling an electric-motor braking force to replace the hydraulic braking force according to the preset slope. By replacing the hydraulic braking force with the electric-motor braking force, the vehicle can be stably parked, and thus the problem of vehicle jerking when the vehicle is braked for parking can be solved.

An emergency brake system for a heavy-duty vehicle, comprising: a pressure sensor arrangement configured to issue a first signal, S1, upon determination that the pressure in a regular brake circuit is zero or below a predefined pressure threshold value, a speed sensor configured to issue a second signal, S2, upon determination that the speed of the heavy-duty vehicle exceeds a predefined speed threshold, a parking-brake sensor configured to issue a third signal, S3, upon determination that the parking brake is in an applied state, a retarder brake configured to decelerate the heavy-duty vehicle upon activation of the retarder brake, a processing circuitry configured to activate the retarder brake upon receiving all of said three signals S1, S2 and S3.

The utility model provides an unhooking braking and parking braking system for a trailer, which belongs to the technical field of trailer braking systems and comprises a front axle, a mop, an upper push rod, an upper connecting rod, a lower push rod, a lower connecting rod, a front pull rod, a chain body, a rear pull rod and a brake. The two ends of the upper connecting rod are hinged to the front pull rod and the upper push rod respectively, and the two ends of the lower connecting rod are hinged to the front pull rod and the lower push rod respectively. A rocker arm of the brake is hinged to the rear pull rod which is connected with the chain body. The mop rotates upwards to push the upper push rod, and the brake pull rod is pulled through the upper connecting rod to drive the brake to achieve parking braking. The mop rotates downwards to push the lower push rod, and the brake pull rod is pulled through the lower connecting rod to drive the brake to achieve unhooking braking. When parking braking and unhooking braking are carried out, the chain body can pull the rocker arm of the brake to carry out braking. When vibration occurs, the chain body reduces the influence of vibration through certain contraction and swing.

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 utility model discloses outdoor power equipment which comprises a vehicle frame, and the vehicle frame is provided with a power output assembly which is arranged to execute outdoor operation; the walking assembly is arranged to support the outdoor power equipment to walk; the operation assembly is operated by a user to control the outdoor power equipment to operate; the power supply device is used for supplying power to outdoor power equipment; the frame is also provided with an operation platform, and the operation platform is arranged on the frame through a damping device; and the parking brake structure is arranged on the operation platform and can move along with the operation platform. When the parking brake structure is arranged on the operation platform, the parking brake structure can synchronously move along with the operation platform, the parking brake structure and the feet of the user are all located on the operation platform, and even if the outdoor power equipment is in a moving state, the user on the operation platform cannot be affected to achieve parking brake operation.

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.

The present invention relates to a method for controlling the braking device (2) of a vehicle having at least one drum brake (4; 6), which can be used as a service brake via an electromechanical actuator device (16) and as a parking brake via a locking device (30) for selectively locking the electromechanical actuator device (16), with the method steps of determining an overload condition caused by a change in the brake temperature, in which overload condition, when the actuator device (16) is locked, an application force (24) of the drum brake (4;6) is greater than a predetermined parking force limit, and overcoming the overload condition by: generating an actuating force (22) by the electromechanical actuator device (16) while at least partially relieving the locking device (30), releasing the locking of the actuator device (16), and subsequently resetting the actuator device (16) against the direction of the actuating force, and locking the reset actuator device (16) by the locking device (30). The present invention further relates to a braking device (2) of a vehicle.;

Disclosed is an actuator for a parking brake. In accordance with an aspect of the disclosure an actuator for a parking brake includes a motor generating power; a reduction gear portion configured to transmit the power of the motor to a parking portion implementing the parking braking of a vehicle; a locking portion configured to limit rotation of the reduction gear portion; and a housing in which the motor, the reduction gear portion, and the locking portion are accommodated; wherein the locking portion is configured to a lock gear coupled to the reduction gear portion to rotate together, a lever provided to be engaged with the lock gear through a hinge motion, an elastic member elastically supporting the lever toward the lock gear, and an electromagnet member that generates electromagnetic force when the power is applied to separate the lever from the lock gear.

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.