2009 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.

A vehicle (22) being operable in an autonomous driving mode having a parking brake (17) with a first actuation unit (9) configured to apply or release the parking brake (17); an activation device (10) configured to activate or deactivate the autonomous driving mode; an interlock (11), wherein the interlock (11) is configured to prevent an activation of the autonomous driving mode unless the parking brake (17) is applied by the first actuation unit (9).

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.

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 provides a vehicle control method, a vehicle and a computer readable storage medium, and relates to the field of vehicle control, the method comprises the following steps: when it is judged that the vehicle slides downwards due to the action of gravity during a climbing period, if a brake pedal stroke is received, obtaining a first braking force distributed for wheels according to the brake pedal stroke, under the condition that the first braking force is larger than the wheel braking force extreme value, the first braking force is reduced to be smaller than the wheel braking force extreme value, second braking force is obtained, the service braking system is controlled to apply braking force to the wheels based on the second braking force, the slip rate of the wheels is obtained, and when the slip rate of the wheels is smaller than the minimum value of the threshold value interval, braking is conducted. And a power system and / or a parking braking system are / is controlled to conduct braking force compensation on the wheels so that the slip rate of the wheels can be within the threshold value interval. According to the method, the vehicle can be prevented from losing stability under the condition that the vehicle falls down or slips, and the stability and safety of the vehicle in a cross-country scene can be improved.

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.

A parking brake control apparatus controls an electric motor based on an "estimated thrust force (stroke)" acquired from a "stroke" corresponding to an electric motor rotational amount acquired based on a current value and a voltage value supplied to the electric motor and a "pad stiffness learned value (more specifically, pad stiffness after a temperature characteristic is taken into consideration)", which is an element regarding stiffness including stiffness of brake pads, when the current value changes according to a change in the voltage value applied to the electric motor.

The invention relates to a compact type running and parking integrated electronic mechanical braking mechanism, and belongs to the technical field of braking equipment. Comprising a mounting frame, a brake assembly and a brake caliper body assembly, and the brake assembly comprises a service brake unit and a parking brake unit; the service braking unit comprises a braking motor and a reduction gear set; the brake caliper body assembly is provided with a brake caliper body, the brake caliper body is slidably installed on the installation frame, and one end of the brake caliper body is connected with the power end of the brake motor through a reduction gear set. The parking braking unit comprises a parking motor, a ratchet wheel and a pawl; the ratchet wheel is connected with the reduction gear set, the pawl is connected with the power end of the parking motor, and a buffering piece is arranged between the pawl and the power end of the parking motor and used for forming flexible connection between the pawl and the power end of the parking motor when the ratchet wheel is locked by the pawl and fails. Flexible connection is formed between the pawl and the power end of the parking motor, the parking stability is improved, frictional wear between parts is reduced, and the service life of the mechanism is prolonged.

A brake actuator (12) is described, particularly for an electromechanical vehicle brake (10), comprising an electric motor (32) for actuating the vehicle brake (10) and a locking assembly (36) for selectively locking an output shaft (38) of the electric motor (32) to form a parking brake function. The locking assembly (36) includes a locking lever (40) pivotably mounted between a locking position and a release position and a locking actuator (42) for pivoting the locking lever (40), wherein a locking tooth (44) is formed on the locking lever (40), which, in the locking position of the locking lever (40), engages with a gear coupled to the output shaft (38) of the electric motor (32).The locking tooth (44) has a locking geometry (61) on one tooth flank (60) and a lifting geometry (63) on an opposite tooth flank (62), which are designed such that when the electric motor (32) rotates in a first direction that increases the braking force, the locking lever (40) is lifted out of engagement with the gear by the rotation of the electric motor (32) against a spring force, and rotation of the electric motor (32) in an opposite direction that releases the braking force is blocked. A vehicle brake (10) is also specified.

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.

The invention belongs to the technical field of rail transit vehicles, and particularly relates to a parking brake module for a locomotive and a control method. According to the technical scheme, the parking brake module for the locomotive comprises a two-way valve, the two inlet ends of the two-way valve are connected with a main blast pipe gas circuit and a train pipe gas circuit respectively, the main blast pipe gas circuit is connected with a main blast pipe cock, the train pipe gas circuit is connected with a train pipe cock, and an air outlet of the two-way valve is connected with an air inlet gas circuit. The other end of the air inlet air channel is connected with a brake air channel, the brake air channel is sequentially connected with a pressure reducing valve and a parking brake electric control valve, the outlet end of the brake air channel is connected with a front bogie parking brake pipe air channel and a rear bogie parking brake pipe air channel, and the front bogie parking brake pipe air channel is connected with a front bogie parking brake cock. And the rear bogie parking brake pipe gas circuit is connected with a rear bogie parking brake cock. The invention provides a parking brake module for a locomotive and a control method.

A shore power alert system for an over-the-road (OTR) vehicle. The OTR vehicle has a cab, a cargo area, and parking brake system with a parking brake and a compressed air source. The OTR vehicle is coupled to a shore power connection. The shore power connection alert system has a first solenoid valve, a compressed air inlet line, a compressed air outlet line, and a transmission unit. The first solenoid valve has a fluid output line and a fluid input line. The compressed air inlet line is fluidly coupled to the compressed air source. The compressed air outlet line is fluidly coupled to the parking brake.

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.

An apparatus for controlling an electro-mechanical braking system includes a first braking control module configured to receive at least one of an electronic parking brake (EPB) switch signal, a braking control signal, or a cylinder pressure value and to operate a parking brake and an additional braking valve; a second braking control module configured to receive at least one of a brake pedal signal, the braking control signal, or the cylinder pressure value and to operate a braking motor and a main braking valve, a first power module configured to supply power to the first braking control module, a second power module configured to supply power to the second braking control module, an integrated switch configured to integrate output powers of the first power module and the second power module, and a connection bus configured to transfer transmission and reception signals, and a method thereof.

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.

A reduction motor for a parking brake mechanical actuator of a drum brake comprising an electric motor comprising an output shaft extending along a first axis, and a reduction gearbox comprising an output shaft extending along a second axis, in which the reduction gearbox, comprises stepped tangentially-meshing spur gears, each stepped gear comprising a gearwheel and a coaxial pinion, these being superposed on and secured to each other in terms of rotation, the stepped gears being mounted with the ability to rotate about mutually parallel axes.

A braking system for a towing vehicle is disclosed. The braking system includes a pressure medium source for supplying pressurized pressure medium, a parking brake module having a control valve and a redundancy valve, a trailer control valve system for a trailer brake of a trailer vehicle towed by the towing vehicle, and an electronic control unit. The electronic control unit is configured to control the trailer control valve system in such a way that pressure medium escapes via the trailer control valve system into a non-pressurized environment, whereby the pressure medium source is emptied, when the control valve or the redundancy valve persist in the open state due to a mechanical defect and otherwise should be in the closed state, and when an ignition of the towing vehicle and a compressor for filling the pressure medium source are switched off.

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.

The utility model relates to the field of electronic brake actuating mechanisms, and discloses a running and parking brake actuating mechanism of a drum type electronic mechanical brake, which comprises a brake driving motor assembly, a brake cylinder, brake shoes and a brake drum, the connecting ends of the two brake shoes are movably installed on the two sides of the brake cylinder. The brake cylinder comprises a cylinder shell and a steel ball sleeve assembly, the steel ball sleeve assembly comprises a rotating wheel and push discs on the left side and the right side of the rotating wheel, the rotating wheel is in transmission connection with the brake driving motor assembly, and annular grooves are formed in the rotating wheel or / and the push discs on the left side and the right side opposite to the rotating wheel. Balls used for pushing the push disc are contained in the annular grooves in the left side and the right side correspondingly, and slope faces are arranged in the circumferential direction of the annular grooves. The rotary steel balls arranged on the two sides are opened in a sleeve mode and push the brake shoes to generate braking force, the axial size is small, occupied space is small, and response is rapid.

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.