211results about "Failsafe aspects" patented technology

Provided are a method and system for auxiliary emergency braking after a braking failure, and an electronic device, a computer-readable storage medium, a computer program product and a computer program. The method comprises: obtaining a braking system failure factor parameter numerical value on the basis of a braking system health state observer or a fault diagnosis module of a current vehicle; constructing a braking risk decision function on the basis of a braking system failure factor and related data of the current vehicle to calculate a current braking risk value, and obtaining a desired lateral displacement of the current vehicle on the basis of the current braking risk value and steering system data; constructing an integral heuristic barrier Lyapunov function on the basis of the desired lateral displacement of the vehicle and vehicle state information after decision making, and obtaining a desired vehicle traveling yaw angle on the basis of a calculation result of the function; and converting the desired vehicle traveling yaw angle into an input front wheel steering angle value of the current vehicle, and converting the input front wheel steering angle value of the current vehicle into steering-assist electric motor output data, so that a steering system intervenes in and controls safe braking after a braking process fails.

The method comprises the following steps: judging whether each wheel clamping force sensor works normally, if so, directly obtaining a brake clamping force as a final brake clamping force, if not, obtaining a first brake clamping force through a motor model, and if not, obtaining a second brake clamping force through a motor model; second brake clamping force is obtained through the brake friction plate model, and fusion is conducted through the fuzzy logic weight algorithm to obtain final brake clamping force; judging whether the wheel has a locking risk or not, if not, calculating the current ground longitudinal force of the wheel according to a kinetic model of the wheel, if so, triggering longitudinal force locking logic, and acquiring the current locking ground longitudinal force as the current ground longitudinal force of the wheel; calculating the current utilization adhesion coefficient of each wheel in combination with the vertical force; and determining the road surface type of the vehicle by using a fuzzy rule based on the adhesion coefficient of each wheel. According to the invention, the problem of low identification precision is solved.

An electromechanical braking system for a vehicle, having at least one first actuator, at least one first and one second energy supply device, wherein one of the energy supply devices is assigned to the first actuator as a primary source for supplying it with electrical energy, and the first actuator has a connection to this primary source. The first actuator additionally has a connection to an energy supply device which is assigned to said actuator as a secondary source and is intended to supply the first actuator with electrical energy from the primary source. An actuator having a primary and a secondary energy absorption device, each for connection to an energy supply device. Vehicle, trailer or utility vehicle combination having such a braking system and / or such an actuator.

A brake system for a vehicle may include at least two hydraulic brake circuits, each having at least one hydraulically acting wheel brake, at least two pressure supply devices, each of which is driven by an electromotive drive, at least one valve assembly having valves for the wheel-individual adjustment of brake pressures and / or for separating the wheel brakes from, or connecting same to, a pressure supply device, at least one electronic control and regulating unit, one of which is a superordinate central control unit that controls individual control and regulating units of the components of the brake system, as well as at least one additional electric drive motor for at least one axle or wheel of the vehicle. The brake system may use the at least one pressure supply device and / or the at least one electric drive motor for controlling pressure in at least one wheel brake for steering interventions.

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 a vehicle braking system and method based on electronic hydraulic active pressurization, and belongs to the field of vehicle redundant braking, the vehicle braking system comprises a main braking module and a redundant braking module, the main braking module and the redundant braking module are both connected with an ECU, and the redundant braking module comprises an HCU and two low-pressure energy accumulators; the HCU comprises a pump motor, a front axle pressure regulation and control assembly used for carrying out pressure regulation on the two front wheels and a rear axle pressure regulation and control assembly used for carrying out pressure regulation on the two rear wheels. By the adoption of the vehicle braking system and method based on electronic hydraulic active pressurization, the pressure control modules can be formed on the front axle and the rear axle respectively only through the four electromagnetic valves, so that the low-selection ABS function is achieved when the main braking module fails, the system structure is simplified, the hardware cost and the fault probability are reduced, and the system reliability is improved. And meanwhile, the direction stability and the out-of-control prevention capacity during vehicle braking can still be guaranteed, and the balance of high efficiency and safety is achieved in a redundant braking scene.

The invention provides a brake control method and device, electronic equipment and a storage medium. The brake control method comprises the steps that in the vehicle driving process, a brake pedal is detected, and when it is detected that the brake pedal fails, the failure type is determined; wherein the failure type comprises a signal failure type and a mechanical failure type; and according to the failure type and the vehicle running parameters, a braking request is sent to a driving motor control unit, so that the driving motor control unit controls a driving motor to brake the vehicle. According to the method, when the brake pedal fails, the driving motor can timely intervene in braking the vehicle, meanwhile, the braking strategy is formulated by distinguishing the failure types and combining the vehicle running parameters, braking control is more accurate and effective, the situation that the vehicle is out of control due to the braking failure of the vehicle is avoided, and the running safety is improved.

A method for operating a braking system for a motor vehicle. The braking system includes at least one hydraulically actuatable wheel brake, a controllable pressure-generating device for providing a hydraulic pressure in a brake circuit including the at least one wheel brake, and an actuating element that is actuatable by a driver and is intended for specifying a braking request. The brake circuit is assigned a sensor for detecting an actual hydraulic pressure in the brake circuit. The pressure-generating device is controlled depending on the braking request and the actual hydraulic pressure detected in the brake circuit by the sensor. An efficiency value of the pressure-generating device is ascertained and stored depending on the braking request and the detected actual pressure. In the event of a function error of the sensor, the pressure-generating device is controlled at least depending on the braking request and the stored efficiency value.

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 braking system for a motor vehicle has a plurality of hydraulic brake units for braking each braking one wheel of the motor vehicle and a first electric parking brake actuator for braking a first wheel and a second electric parking brake actuator for braking a second wheel. A first control device comprises a first hydraulic controller which is designed and set up to drive the plurality of hydraulic brake units. In order to ensure parking brake redundancy, the first control device has a driver for driving the first parking brake actuator. A second control device is also provided, which comprises a driver for driving the first parking brake actuator and a driver for driving the second parking brake actuator.

A sticking detection method and apparatus for an electronic park brake system, and a device and a vehicle. The method comprises: in response to a caliper clamping instruction, controlling an electric motor of an electronic park brake system to rotate in a first direction, so as to control a caliper of the electronic park brake system to perform a clamping action; measuring a load current of the electronic park brake system during the process of the caliper performing the clamping action, so as to obtain a first load current; when the first load current reaches a first current threshold value, performing sticking detection on the caliper and the electric motor, so as to obtain a sticking detection result, wherein the sticking detection result is used for indicating whether the electronic park brake system has a clamping sticking anomaly; and when the sticking detection result indicates that the electronic park brake system has a clamping sticking anomaly, determining that the electronic park brake system is abnormal. The method effectively improves the accuracy of fault detection for electronic park brake systems.

A pedal structure (1), comprising: a pedal body (10), which is hinged to a support (14) by means of a pivot (12); a rotary wheel (17), the rotary wheel (17) being connected to a parking brake mechanism by means of an execution mechanism (2); and a force simulator (15), the force simulator (15) being connected to the pivot (12), and the force simulator (15) comprising an electric control clutch (155) provided on the pivot (12). When the electric control clutch (155) is powered off, the rotary wheel (17) is connected to the pivot (12) by means of the electric control clutch (155), and when the electric control clutch (155) is powered on, the rotary wheel (17) is separated from the electric control clutch (155). An electric control braking system comprising the pedal structure (1) is further disclosed. When the braking capacity of the electric control braking system is reduced or during emergency braking, the electric control clutch (155) is actively or passively powered off, a driver steps on the pedal body (10), the rotary wheel (17) rotates, and a braking force is applied to a brake disc (5) by means of the execution mechanism (2) and the parking brake mechanism. Also disclosed is an automobile comprising the electric control braking system.

An electronically controlled pneumatic parking brake system (305) for a vehicle (100) is described, comprising a control device (300) that generates electronic signals to apply and release the parking brake (360). This system utilizes an air supply source (230) and two electropneumatic valves (210, 220) for brake operation. The first valve (210) releases the brake by admitting pressurized air into a control chamber (260) upon receiving a release signal, whereas the second valve (220) activates the brake by venting air to atmosphere upon receiving an actuation signal. The control device (300) is also capable of detecting malfunctions in these valves and can perform a recovery function to heat the valves (210, 220) to restore their function.After recovery, the controller uses a PWM signal generator (301) to repeatedly apply and release the brake by alternately operating the valves (210, 220).

The main and standby integrated passive electric control brake valve comprises a main brake valve and an auxiliary brake valve, the main brake valve and the auxiliary brake valve share one control box, an oil storage cup and an oil pipe connector, and oil cavities of the main brake valve and the auxiliary brake valve are both communicated with the oil outlet end of the oil storage cup; a self-return shuttle valve is arranged between the main brake valve and the auxiliary brake valve, and an oil passing cavity is formed in the self-return shuttle valve; a steel ball is arranged in the oil passing cavity in a sliding mode and can block the paths, flowing to the oil pipe connector, of oil in the main brake valve and the auxiliary brake valve, and elastic damping pieces are arranged at the ends, close to the oil inlet direction of the main brake valve and the auxiliary brake valve, of the steel ball. The elastic damping part is arranged to counteract hydraulic force in the pressure reduction process, so that the steel ball cannot block a communication path of the main brake valve oil cavity and the oil passing cavity during pressure reduction, hydraulic oil can flow back to the main brake valve, and the oil pumping fault can be avoided.

The invention provides a vehicle control method and device, electronic equipment and a vehicle, and is applied to the technical field of vehicle intelligent control. The method comprises the steps that in response to a received brake master cylinder pressure signal, whether the brake master cylinder pressure signal is abnormal or not is judged; in response to determining that the brake master cylinder pressure signal is abnormal, a brake pedal status signal is obtained, and an alternative value of the brake master cylinder pressure is determined based on the brake pedal status signal. The situation that the operation of a driver on the brake pedal does not conform to vehicle judgment due to the fact that a fixed replacement value is used is avoided. And the safety, the reliability and the driving comfort of the vehicle control system are obviously improved.

The invention relates to a brake system and a method of controlling the brake system. The brake system includes a sensor module including a motor current sensor and a force sensor, electromechanical brake units respectively mounted on wheels of a vehicle and including a motor, and a controller configured to control one or more of the electromechanical brake units; the controller is configured to: predict a state of the motor of the electromechanical brake unit based on a current signal of the motor detected by the motor current sensor, when at least one predicted state of the motor indicates that at least one of the motors is faulty, determine whether the motor is faulty; determining a fault level of the at least one failed motor based on sensor data obtained from the sensor module, calculating a requested torque for each of the wheels based on the determined fault level of the at least one failed motor, the torque of each of the wheels is controlled based on the calculated requested torque of each of the wheels.

A vehicle axle may include hydraulically operating wheel brakes and / or additional hydraulic loads, such as clutch plate cylinders. The vehicle axle may include at least one pressure supply device, driven by an electric-motor drive, to control pressure in the wheel brakes; at least one control and regulating device; a valve assembly having values for setting wheel-specific brake pressures and / or for disconnecting / connecting the wheel brakes from / to the pressure supply device, and at least one electric drive motor for driving and braking a vehicle wheel or the axle. At least one pressure supply device is used to control the pressure of and / or provide pressure to at least one additional brake unit in the form of an electric parking brake, a hydraulically supported electromechanical brake, an electromechanical brake and / or a force-supporting steering device, a gear actuator and / or transmission actuator, and / or a torque vectoring module.

The present invention relates to a device (V) for controlling a passive braking device (2), in particular a passive electromechanical braking device, wherein the device (V) comprises: an electric motor (M) for releasing the passive braking device (2) against a spring force; a motor control unit (4) for controlling the electric motor (M) for service braking and / or emergency braking, wherein the motor control unit (4) is separably electrically connected to the electric motor (M); a first brake control unit (6) for safety braking, wherein the first brake control unit (6) is separably electrically connected to the electric motor (M); and a second brake control unit (8) for parking braking, wherein the second brake control unit (8) is separably electrically connected to the electric motor (M), wherein the service braking and / or emergency braking is controlled by means of the motor control unit (4).The safety braking via the first brake control unit (6) and the parking braking via the second brake control unit (8) can be activated functionally independently of each other. Furthermore, the present invention relates to a brake system (BS) with said device (V) and a method for controlling a passive brake device (2), in particular a passive electromechanical brake device.

Disclosed herein is an emergency braking system using an electronic parking brake according to the present disclosure, in which the emergency braking system is configured to provide an emergency braking using an electronic parking brake (EPB) in case of total or partial failure of a main braking system, and includes: an EPB actuator configured to apply an emergency braking force to a wheel; a slip detection unit configured to detect a wheel slip on the wheel equipped with the EPB actuator; an EPB control unit configured to determine a road surface condition by calculating a slip ratio through slip information transmitted from the slip detection unit, and to control an operation of the EPB actuator based on the road surface condition.

The invention relates to an electromechanical braking system (1) for a motor vehicle, comprising four wheel brake devices (2), four primary electric motors (3), four secondary electric motors (4), four control devices (5) and one backup control device (8). The braking system (1) according to the invention is characterized in that the control devices (5) and / or the backup control device (8) are configured to detect and / or evaluate sensor data of sensors (6) assigned to the wheel brake devices (2) and / or to the motor vehicle, a primary electric motor (3) and a secondary electric motor (4) are respectively assigned to each of the wheel brake devices (2) for operating the respective wheel brake device (2), and each of the control devices (5) is respectively assigned to the primary electric motor (3) of one of the wheel brake devices (2) and the backup control device (8) is respectively assigned to the four secondary electric motors (4) of the wheel brake devices (2) for driving the electric motors (3, 4).

A pneumatic brake system for a towing and towed vehicle, wherein the brake system comprises means for supplying a supply pressure and means for supplying a control pressure to the towed vehicle. An electrical connection is provided between respective ECUs (29, 43) on the towing and towed vehicles being able to exchange information and determine whether the brake system in both towed and towing vehicle is compatible with an electronic brake signal and whether the brake system is compatible with secondary supply pressure being applied via a control pressure line. If both conditions are fulfilled, the brake system actuates a switching device or devices (31) on the towing and towed vehicles to direct air from the means for supplying a control pressure to a second pneumatic supply circuit in the towed vehicle.

The embodiment of the present application provides a brake control method and system for a distributed brake system, which is applied to a vehicle, wherein the brake domain controller is connected to the wheel side controller via a high-speed bus communication, and the wheel side controller is connected to the wheel speed sensor via a signal line communication; when the high-speed bus communication fails, the brake domain controller enters a fault state, and the wheel side controller applies a target clamping force to the vehicle's wheel through an electronic caliper, and controls the electronic caliper according to the wheel speed signal collected by the wheel speed sensor to achieve wheel braking. The safe braking of the vehicle is achieved through the wheel side controller, improving the safety and robustness of the distributed brake system, and the wheels are controlled by the target clamping force to achieve safe braking with the minimum deceleration, ensuring that the vehicle can still achieve safe braking even when the high-speed bus communication fails and cannot be controlled by the brake domain controller, thereby improving safety and system robustness.

The invention provides a vehicle drive-by-wire backup system and an implementation method thereof, the vehicle drive-by-wire backup system is used for receiving a driving signal sent by an electronic pedal, the vehicle drive-by-wire backup system comprises a plurality of sub-driving modules and a main driving module, each sub-driving module comprises a sub-control unit, an actuating module, a sensing module and a sub-communication unit, the sub-driving modules are coupled through the sub-communication units so as to transmit signals, and the sub-driving modules are coupled with the electronic pedal through the sub-communication units; the main driving module comprises a main control unit and a main communication unit, the main control unit and the main driving module are coupled with the sub driving modules and the electronic pedal through the main communication unit, and the main driving module transmits signals to the sub driving modules through the main communication unit; and receiving the driving signal through the main communication unit.

The invention relates to a park brake module (1) comprising a relay valve unit (17) for providing a brake release pressure (pBR) to a working port (7) and a safety unit (19) for connecting the working port (7) to the exhaust (9). The relay valve unit (17) comprises a relay piston (25), wherein the working port (7) is in fluid communication with an exhaust (9) when the relay piston (25) is in an exhaust position (29). The relay piston (25) is slidable independently of a safety piston (54) of the safety unit (19) when the safety piston (54) is a neutral position (75), and the relay piston (25) is locked in the exhaust position (29) when the safety piston (54) is in a safety position (77). The invention further relates to a method (300) for controlling a park brake function, a brake system (100) and a commercial vehicle (202).

Disclosed herein are an electromechanical brake system and a control method thereof. In accordance with one aspect of the present disclosure, there is provided an electromechanical brake system including electromechanical brakes respectively provided on four wheels of a vehicle, a sensor part that outputs a signal which corresponds to or is capable of estimating whether each of the electromechanical brakes is normal and a driver demand braking torque generated based on the speed and lateral acceleration of the vehicle and a brake pedal operation of a driver, and a controller that estimates a demand braking torque based on the signal received from the sensor part and determines whether the electromechanical brakes are normal, wherein the controller performs a braking control as much as the demand braking torque based on the determination that the electromechanical brakes are normal, and performs a braking control by distributing, within a range of the demand braking torque, braking torques based on the lateral acceleration of the vehicle to the respective other electromechanical brakes except the electromechanical brake determined to malfunction based on the determination that there is a malfunction of any one among the electromechanical brakes.

A braking device for a vehicle with increased operating safety and to a method for operating a braking device for a vehicle with increased operating safety is described. The proposed braking device comprises a container with a cavity, a hydraulic block and an electronic brake control device that is configured to control the pressure supply device. The brake control device is arranged in the container. Furthermore, at least one sensor element that is designed to detect a fluid is provided.

The invention relates to a motor vehicle braking system with a brake pedal unit comprising sensors for detecting a quantitative brake pedal actuation value and an electronic control unit configured to receive the brake pedal actuation value and, based on this value, to control a brake actuator to decelerate the motor vehicle. To ensure functionality in the event of a "stuck pedal" fault, the brake pedal unit has a contact sensor on a foot contact surface, and the control unit is configured to detect a pedal fault, in particular a stuck pedal, based on a signal from the contact sensor and the brake pedal actuation value, and in this case to initiate deceleration of a predetermined magnitude.

The present application discloses a fault handling method and system for an energy recovery system of an electric forklift, and the technical field to which it belongs is forklift control technology. The fault handling method for the energy recovery system of the electric forklift includes: determining whether there is a fault in the energy recovery system of the electric forklift; if so, determining the fault level and setting the fault with the highest level as the core fault; if the forklift is in a driving state and the level of the core fault is lower than or equal to a preset level, then after receiving a braking instruction, controlling the drive motor and / or the electro-hydraulic proportional valve to perform braking according to the pedal angle of the electric brake pedal; if the forklift is in a driving state and the level of the core fault is higher than the preset level, then after receiving a braking instruction, controlling the drive motor and / or the electro-hydraulic proportional valve to perform braking according to the fault type of the core fault. The present application can perform reasonable braking control after a forklift fails, improving the safety of forklift driving.

A system and method for allowing failover between an autonomously controlled braking system and a human controlled braking system in a truck having pneumatic brake lines is provided. A cab-mounted brake actuator is arranged to be handled by the human operator and is arranged to selectively deliver pressurized air to truck brakes and a trailer brake air supply. A controller performs autonomous braking operations in response to control inputs and senses when a human operator is handling the actuator. A plurality of valves, interconnected between a pressurized air source on the truck, the actuator, the truck brakes and the trailer brake air supply, are responsive to the controller, and are arranged to override selective delivery of pressurized air to the truck brakes of the truck and the trailer brake air supply in response to the autonomous braking operations in favor of selective delivery of pressurized air via the actuator.

The invention relates to a method for operating a brake system, a control unit and a brake system, the brake system having at least one hydraulically actuatable wheel brake, at least one actuatable pressure-generating device and at least one actuation element actuatable by a driver, the invention relates to a brake system for a motor vehicle, comprising a pressure-generating device for providing a hydraulic pressure in a brake circuit having at least one wheel brake, and an actuating element for presetting a brake request, the brake circuit being associated with at least one sensor for detecting an actual hydraulic pressure in the brake circuit, and the actuating element being associated with the brake circuit. The pressure generating device is actuated as a function of the brake request and the actual hydraulic pressure in the brake circuit detected by the sensor. According to the invention, an efficiency value of the pressure-generating device is ascertained and stored as a function of the braking request and the detected actual pressure, and the pressure-generating device is actuated at least as a function of the braking request and the stored efficiency value in the event of a malfunction of the sensor.