162results about "Failsafe aspects" patented technology

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.

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.

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.

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.

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.

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 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.

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.

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 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.

The application relates to the technical field of automobile control, in particular to a control method, device and equipment of a three-chip redundant automobile brake controller, the automobile brake controller comprising a main controller, a first auxiliary controller and a second auxiliary controller, wherein the method comprises the following steps: detecting a current working state of the main controller; judging whether the current working state meets preset failure conditions; if the current working state meets the preset failure conditions, performing brake control on the automobile based on the first auxiliary controller and / or the second auxiliary controller, otherwise, performing brake control on the automobile based on only the main controller. Thus, the problem that vehicle functions cannot be maintained when a key chip of a brake system fails is solved, redundancy backup is realized, safety and reliability are increased, and the chip resource requirement for the auxiliary chip is reduced.

The present application relates to the technical field of braking system, in particular to a double-redundant single-axis electro-hydraulic braking system and control method. The double-redundant single-axis electro-hydraulic braking system is characterized in that: the brake fluid storage pot is a two-cavity brake fluid storage pot or a three-cavity brake fluid storage pot, the brake fluid storage pot comprises a first storage cavity, a second storage cavity and a third storage cavity, the first storage cavity is connected with a left brake control mechanism, the second storage cavity is connected with a right brake control mechanism, the left brake control mechanism and the right brake control mechanism are connected through a plurality of balance valves, and the plurality of balance valves are connected in parallel. Compared with the prior art, the redundancy mode of the brake control mechanism, the electromagnetic valve and the balance valve is increased, the working mode is not a single switching and starting mode, but a free and flexible replacement working mode according to the failure condition, which greatly increases the redundancy control condition of the braking system in response to various failure conditions.

An electronic parking brake system includes: a first electronic parking brake (EPB) including a first electric motor configured to provide a first braking torque to a first wheel of a vehicle; a second EPB including a second electric motor configured to provide a second braking torque to a second wheel of the vehicle; a first controller configured to control the first electric motor; and a second controller configured to control the second electric motor, wherein the first controller is configured to transmit a first signal to the second controller at predetermined intervals, and the second controller is configured to increase the second braking torque provided to the second wheel, based on the first signal not being received from the first controller.

The invention discloses an intermediate shaft brake fault diagnosis method, device and equipment and a storage medium, and belongs to the technical field of fault diagnosis. The method comprises the steps that if the air pressure value is not smaller than the preset air pressure value, the clutch position is obtained, and whether the clutch position is not smaller than the clutch complete separation position or not is judged; if the clutch position is not smaller than the clutch complete separation position, an air inlet valve of an intermediate shaft brake is controlled to be opened and an exhaust valve is controlled to be closed; acquiring the speed reduction rate of the rotating speed of the intermediate shaft within the set time, the current air pressure value and the current oil temperature value; according to the current air pressure value and the current oil temperature value, a corresponding preset speed reduction rate is obtained through a speed reduction rate table; and the speed reduction rate of the rotating speed of the intermediate shaft is compared with a preset speed reduction rate, and if the speed reduction rate of the rotating speed of the intermediate shaft is not larger than the preset speed reduction rate, it is determined that a brake breaks down. According to the technical scheme, the interference of insufficient air pressure on fault diagnosis of the intermediate shaft brake is at least reduced, and the accuracy of fault diagnosis is improved.

An object of the present invention is to provide a vehicle brake system capable of executing an antilock brake control even when a hydraulic pressure control device is not operated. The hydraulic pressure generating device 1 includes master cut valves 7a, 7b for opening and closing a main hydraulic passage leading from a master cylinder 10 to a hydraulic pressure control device 2, communication passages 3a, 3b leading from a slave cylinder 30 to the main hydraulic passage 1a, 1b, shut-off valves 8a, 8b, for opening and closing the communication passages, and a control device 4. The control device 4 is configured to generate brake hydraulic pressure from the slave cylinder 30 when the hydraulic pressure control device 2 is not operated, and to perform antilock brake control by controlling the master cut valves 7a and 7b and the shut-off valves 8a and 8b for each of the first main hydraulic passage 1a and the second main hydraulic passage 2b according to a slip state of the wheel.

The invention relates to a redundancy valve assembly (1) for redundantly supplying a redundant brake pressure (p2) into a service brake pressure path (40) of an electronically controllable pneumatic braking system (204) for a vehicle (200), preferably a utility vehicle (200), comprising a service brake pressure connection (4) for receiving a service brake pressure (p1) from a service brake pressure modulator (142); a redundancy brake pressure connection (6) for receiving a redundancy brake pressure (p2) from a redundancy brake pressure modulator (142), and a brake actuator connection (8) for connecting at least one brake actuator (207). The redundancy valve assembly (1) is electrically actuatable in order to optionally modulate the service brake pressure (p1) or the redundancy brake pressure (p2) at the brake actuator connection (8). The invention also relates to an electronically controllable pneumatic braking system (204), to a vehicle (200) and to a method.

A controller, 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.

A system (200) is described for verifying a braking release condition by braking means (201) of at least one vehicle (V), particularly at least one railway vehicle, comprising: braking control modules (202), a control means (204), a first communication means, and a second communication means distinct from the first communication means. The control means (204) is arranged to actuate at least one signaling means (210) when it is receiving, from all the braking control modules (202), respective messages of successful braking release through at least one of the first and second communication means (206, 208). An additional system (200) is also described for verifying a braking release condition by braking means (201) of at least one vehicle (V), particularly at least one railway vehicle, wherein the control means (204) is arranged to actuate at least one signaling means (210) when it determines that all braking control modules, through at least one of the first and second communication means (206, 208), are transmitting respective applied braking force messages indicating a released braking condition.

The present invention relates to a vehicle redundant braking system and vehicle, and relates to the technical field of autonomous driving vehicles. The system includes: a first controller, a second controller, a first braking module, and a second braking module. The main controller is connected to the first controller via a first communication link, the main controller is connected to the second controller via a second communication link, the first controller, the second controller, and the first braking module are all connected via a third communication link; and the first controller and the second controller are both connected to the second braking module. The main controller, the first communication link, the first controller, the third communication link, and the first braking module are the main braking link. If any single point or multiple points on the link fail, the control mode is switched to redundant braking. The redundant braking system of the present invention does not require additional redundant braking components, which can reduce hardware costs.

The present invention discloses an electric parking brake control device capable of accurately determining operation of an electric actuator . The electric parking brake control device is capable of performing an application process for controlling the electric actuator to move in the direction in which a friction member is pressed against a rotation body that rotates integrally with a wheel and a release process for controlling the electric actuator to move in the direction in which the friction member is moved away from the rotation body. Even upon receiving (time t12) a new operation request for operating the electric actuator during a period (time t1 to t5) from the start of the application process or the release process to the completion of the process, the electric parking brake control device does not change the operation of the electric actuator on the basis of the operation request.

An actuator for a parking brake is disclosed. According to one aspect of the disclosure, an actuator for a parking brake comprises a motor that generates a force; a reduction gear section configured to transmit the force of the motor to a locking section that implements a parking brake application of a vehicle; a housing in which the motor and the reduction gear section are accommodated; a housing cover by which the housing is closed; and a locking section configured to limit the rotation of the reduction gear section.wherein the locking section is formed by a locking element provided in such a way that it is movable in an axial direction of the reduction gear section and is in close contact with or spaced apart from the reduction gear section, an elastic element that elastically supports the locking element towards the reduction gear section, and an electromagnetic element designed to separate the locking element from the reduction gear section by generating an electromagnetic force when current is applied.