128results about "Failsafe aspects" patented technology

The invention provides a braking force distribution method and device for multiple units. The method comprises acquiring a target braking force of an entire train at present, wherein the target braking force of the entire train is the maximum braking force required to stop the entire train; acquiring a braking force capability value that can be applied by each unit of the entire train at present, wherein the braking force capability value of each unit includes a sum of an electric braking force and an air braking force that can be applied by all bullet trains and trailers in the unit; according to the target braking force and the braking force capability value of each unit at present, distributing a braking force target value of each unit on the basis of the load ratio of each unit, wherein the sum of the braking force target values of all the units is equal to the target braking force. By applying the method, the situation that the braking force difference between the units is too large when the bullet train or the trailer in a certain unit fails is avoided, so that the safe operation of the train is guaranteed.

The embodiment of the invention provides a rail train brake control system and relates to the field of rail transit. The rail train brake control system comprising a single brake control unit, a wholetrain brake control unit, a traction control unit and a communication control unit is characterized in that the single brake control unit is arranged in each carriage of a rail train; the whole trainbrake unit and the communication control unit are arranged in the carriages located on both ends of the rail train; the traction control unit is arranged in power cars of multiple carriages; the single brake control unit, the whole train brake control unit, the traction control unit and the communication control unit realize communication through gateway. Further provided is a train comprising the above-mentioned system. The rail train brake control system has the advantage of realizing flexible grouping of the train with each carriage provided with the single brake control unit to apply airbraking force, each power car provided with the traction control unit to apply electric braking force, and the whole train brake control unit adopted to conduct centralized control.

The present invention relates to a master cylinder arrangement for a motor vehicle hydraulic brake system comprising a housing, in which two adjacent cylinder bores are provided, two piston arrangements, wherein a first piston arrangement is received in a first of the cylinder bores so as to be displaceable along a first bore longitudinal axis and wherein a second piston arrangement is received in a second of the cylinder bores so as to be displaceable along a second bore longitudinal axis, a force input piston, which is connectable or connected to a brake pedal, wherein in accordance with a movement of the force input piston the first piston arrangement and the second piston arrangement are displaceable, wherein the first piston arrangement with the housing delimits a first pressure chamber, which is fluidically connected to a hydraulic brake system, and wherein the second piston arrangement with the housing delimits a second pressure chamber, which is fluidically connected to the hydraulic brake system. In this master cylinder arrangement it is provided that between the first piston arrangement as well as the second piston arrangement and the force input piston a separate transmission element is disposed, which is movable into joint abutment with the first piston arrangement and the second piston arrangement.

The invention relates to an actuator system, in particular an electromechanical parking brake system, comprising an actuator, wherein the actuator is driven by a direct current motor that can be driven in both directions of rotation, wherein a control unit for controlling the movement of the direct current motor in an open-loop or closed-loop manner is provided. The core of the invention is that one or more pieces of information are supplied to a control unit, said information allowing the application force exerted by the electromotive actuator to be determined and compared to a predetermined minimum application force, and wherein the control unit emits at least one piece of information, signal or the like for requesting an auxiliary actuation to peripheral systems, components and / or electronic control units after the target to actual value comparison has shown that the determined, set application force is smaller than the predetermined minimum application force.

The invention provides a vacuum pump control method and device and an electric car and relates to the field of electric car control. The problems that in the prior art, the property of a vacuum pump cannot be ensured, and reliability and safety are low are solved. The method is applied to a vacuum pump system which comprises an atmospheric pressure sensor and a relative pressure sensor. The method comprises the steps that when breakdowns do not occur to the two pressure sensors, the vacuum degree of a vacuum booster is determined according to an absolute pressure value detected through the atmospheric pressure sensor and a relative pressure value detected through the relative pressure sensor, and the vacuum pump is controlled according to the vacuum degree; when the breakdowns occur to the atmospheric pressure sensor and do not occur to the relative pressure sensor, the vacuum pump is controlled according to the relative pressure value; and when the breakdowns occur to the relative pressure sensor, the vacuum pump is controlled according to braking signals. According to the scheme of the vacuum pump control method and device and the electric car, effective control over the vacuum pump under different breakdown conditions is achieved, so that the property of the vacuum pump is ensured, and reliability and safety are improved.

The embodiment of the invention provides an electronic vacuum pump control method and device. The method includes the steps that the vehicle speed, the vacuum degree in a vacuum pipeline and the barometric pressure of the external environment are detected in real time; the vehicle speed grade of the current vehicle speed is confirmed; a first vacuum degree corresponding to the current vehicle speed grade is confirmed according to the detected barometric pressure of the external environment; whether the current vacuum degree in the vacuum pipeline reaches the first vacuum degree or not is judged; if the current vacuum degree in the vacuum pipeline does not reach the first vacuum degree, an electronic vacuum pump is controlled to be kept in a started state; and if the current vacuum degree in the vacuum pipeline reaches the first vacuum degree, the electronic vacuum pump is controlled to be kept in a closed state. By the adoption of the method and device, the first vacuum degree corresponding to the current vehicle speed grade is confirmed according to the detected barometric pressure of the external environment, the electronic vacuum pump is controlled by detecting whether the current vacuum degree in the vacuum pipeline reaches the first vacuum degree or not in real time, the starting and stopping requirements of the electronic vacuum pump are different under different vehicle speed grades, the use frequency of the electronic vacuum pump is reduced, the working time of the electronic vacuum pump is shortened, and the service life of the electronic vacuum pump is prolonged.

An abnormal detecting system for a pneumatic brake includes a pedal stroke sensor, a front chamber pressure sensor, a rear chamber pressure sensor, a storage unit pressure sensor, a parking brake switch and an abnormal detecting circuit. A pedal stroke signal, a front chamber pressure signal, a rear chamber pressure signal, an air storage unit pressure and a parking brake control signal are output. The abnormal detecting circuit receives the pedal stroke signal, the front chamber pressure signal, the rear chamber pressure signal, the air storage unit pressure signal and the parking brake control signal. The abnormal detecting circuit compares the pedal stroke signal with the front chamber pressure signal or the rear chamber pressure signal and then outputs a first abnormal signal; and the abnormal detecting circuit compares the parking brake control signal and then outputs a second abnormal signal.

The invention discloses a braking system with dual-control independent control function, which is provided with a first braking control unit (S1) and a second braking control unit (S2). The first brake control unit (S1) and the second brake control unit (S2) are control units that each independently completes the parking control function. The invention also discloses a control method of the parking brake system. By adopting the technical scheme, the complete normal parking function can be satisfied, and the safe braking and parking function can be satisfied when different power supplies, functional modules and circuits fail by a dual independent control mode, and the braking system and the method have the advantages of high safety, simple application process, convenience and portability, and convenient arrangement.

A system for providing driverless operation of a utility vehicle in a limited area, including: a control module to output a valid autonomous control signal to an electropneumatic parking brake system and to control the utility vehicle in a driverless manner, wherein the utility vehicle allows an autonomous operating mode and includes the electropneumatic parking brake system which is configured to release the parking brake system when the valid autonomous control signal is present and to initiate automatic emergency braking when no valid autonomous control signal is applied; and a transfer module to transfer control of the utility vehicle from the driver to the control module. Also described are a related method and computer readable medium.

An electronic device for stopping a vehicle can be activated automatically in the presence of an emergency stopping instruction. A module calculates at least one automatic movement setpoint of the vehicle in order to follow an emergency stopping trajectory comprising a plurality of successive emergency stopping vectors each associated with a separate segment of a portion of the successive segments of the predefined trajectory, from at least for each emergency stopping vector: a stored last actual movement vector of the autonomous vehicle, the predefined movement trajectory of the autonomous vehicle, and a stored last location datum of the autonomous vehicle, and delivered by at least one sensor of the autonomous vehicle. An emergency steering module is capable of steering the vehicle according to said at least one setpoint.

A brake wear analysis system is presented for use within a work machine. The brake wear analysis system includes a brake charge system as well as at least one accumulator connected to the brake charge system. The at least one accumulator operable to flow a fluid from the accumulator to a brake control valve based on an executed braking action. A change of pressure within the at least one accumulator being received by a pressure sensor connected to the brake charge system and transmitted to a brake wear analysis module within the controller of the work machine. The brake wear analysis module being configured to compare the flow of fluid from the at least one accumulator with a predetermined condition resulting in a determination of whether or not a braking mechanism of the work machine is functioning in a worn condition.

Disclosed herein is a safety stoppage device and method for safety stoppage using a brake system of an autonomous vehicle, wherein the brake system includes a brake-control unit and wheel brakes; the autonomous vehicle is provided with control networks and sensors for monitoring the autonomous vehicle surroundings and motion, and a signaling processing system for processing sensor signals enabling an autonomous drive mode thereof. It is continuously predicted where a drivable space exists, based on data from the sensors and sensor fusion, and calculated a safe trajectory to a stop within the drivable space, that is sent to the brake-control unit and stored therein; and the brake-control unit is shielded against electromagnetic compatibility problems and arranged to monitor if the control networks are operational, and if determined incapacitated, control the autonomous vehicle to follow the most recently calculated safe trajectory to a stop within the drivable space using differential braking of the wheel brakes thereof in order to effectuate steering.

A brake device wherein, when a malfunction occurs that renders a slave cylinder (42) inoperable, wheel cylinders (26, 27, 30, 31) are actuated by brake fluid pressure generated by a master cylinder (11), which is actuated by a brake pedal (12). When the rotational speed of a motor (44) of the slave cylinder (42) is greater than a standard value set according to the stroke of the slave cylinder (42), an idling detection means detects idling of the motor (44), making it possible to detect idling of the motor (44) reliably and quickly. When idling of the motor (44) is detected, a control means opens master cut valves (32, 33) and the wheel cylinders (26, 27, 30, 31) are actuated by brake fluid pressure generated by the master cylinder (11), thus enabling the inoperable slave cylinder (42) to be quickly backed up by the master cylinder (11).

A safety system for a train equipped with an ECP air brake arrangement, in which the train includes at least one locomotive and at least one railcar connected to a trainline network, the system including: at least one power supply; at least one power supply controller to communicate over the trainline network and control the at least one power supply; at least one local controller to: communicate over the trainline network; receive or determine railcar data including a condition or parameter associated with the at least one railcar; and, based at least partially on the railcar data, generate at least one first message to deactivate the at least one power supply. A computer-implemented method for monitoring and responding to at least one railcar's derailment is also disclosed.

The invention relates to a braking control system, method and device. The method comprises the steps that if recognizing a braking operating condition, an advanced driving auxiliary system sends braking requests to an electronic stability program (ESP) system and an electrical parking brake (EPB) system simultaneously; the ESP system executes a first brake according to the braking request sent by the advanced driving auxiliary system; the EPB system receives the braking request sent by the advanced driving auxiliary system, and a monitoring function to the ESP system is started; and if the EPB system monitors the situation that executing of the first brake by the ESP system fails, a preset braking mode is started, brake controlling is conducted on a vehicle through the EPB system. The braking control system, method and device can guarantee the braking effect and improve the safety of braking.

An anomaly detection system is on an in-vehicle network including: a first network connected to first devices that communicate using a first protocol; and a second network connected to second devices that includes a driving assistance controller communicates using a second protocol. The system includes: a communicator receiving, through the first network, first unit data including (i) source information indicating a source first device and (ii) second unit data including a data identifier; a database storing rule; and an anomaly determiner that determines whether the first unit data has anomaly by comparing the source information and the data identifier with the rule. Based on the rule, the first unit data is determined to have anomaly when the source first device is a sensing device and, according to the identifier, the second unit data is to be received by the controller.

The invention provides a control method and system of an automobile electric air compressor. The control method comprises the following steps that an automobile power supply is electrically connectedwith the electric air compressor through a DCAC inverter, and the DCAC inverter is connected with a vehicle control unit through a CAN bus; when an ignition lock is on the ON gear, the DCAC inverter is turned on for hardware detection, if detection results of the DCAC inverter are normal, the direct current output from an automobile power supply is converted into alternating current by the DCAC inverter to supply power to the electric air compressor, so that the electric air compressor enters into a heat engine mode; a gas pressure value in a gas storage cylinder is detected, a pressurizationmessage is sent by the vehicle control unit when the gas pressure value is less than a set threshold value, and the electric air compressor is activated after the DCAC inverter receives the pressurization message. The service life and intelligence of the air compressor are prolonged and improved by the method.

The invention discloses a method and device for processing fault information of a wired electronic control air brake system.The method includes the steps that whether the fault information of the wired electronic air brake ECP system is received or not is monitored; if yes, the type of the fault information is judged according to a preset classification strategy, and display priorities are distributed to the fault information according to the type of the fault information; the fault information is displayed according to the preset display strategy, the type of the fault information and the display priorities of the fault information.According to the scheme, display of various kinds of fault information in the ECP system can be coordinated, the different kinds of fault information are displayed according to the display priorities of the fault information, and therefore operators can take measures of different levels aiming at the different kinds of fault information, and the different kinds of fault information of the ECP system can be reasonably processed.

A regenerative braking control apparatus equipped on an electrically driven vehicle having road wheels and an electric motor for driving the road wheels for running. An operation unit is provided for the driver of the vehicle to select a magnitude of the braking force to be generated by the electric motor during regenerative braking. A determination unit determines, on the basis of conditions of the electrically driven vehicle, whether or not a selected braking force selected through the operation unit is acceptable. A notifier unit is constructed such that, in a case where the selected braking force is determined to be unacceptable by the determination unit, the notifier unit provides a corresponding notification to the driver.

A vehicle is provided. The vehicle includes a plurality of controllers and a driver. Each controller is configured to receive one or more braking signals. Each controller is also configured to generate one or more braking commands in correspondence to the one or more braking signals. The driver is configured to perform a voting operation on the one or more braking commands to determine whether to generate a driving signal to at least one brake.

The invention discloses a hydraulic braking system and method, and relates to the field of automobile braking. The system comprises an oil storage tank, a decoupling type pedal device connected with the oil storage tank and used for collecting pedal braking information, a braking device connected with the oil storage tank and used for collecting oil pressure of a braking oil way and braking the vehicle, a controller connected with the decoupling type pedal device and the braking device and used for receiving pedal brake information and brake oil way oil pressure, obtaining the vehicle speed and generating a conventional brake instruction, and generating an unconventional braking instruction if the fault information is collected, a conventional braking power device connected with the braking device and the controller and used for receiving a conventional braking instruction to control the braking device to perform conventional braking, and a non-conventional braking device connected with the braking device and the controller and used for receiving a non-conventional braking instruction to control the braking device to perform non-conventional braking. Under the conditions that an electronic braking system fails and pedal assistance is lost, a driver is assisted in emergency braking through an unconventional braking device, and sudden increase of braking force is avoided.

Electronic brake system is disclosed. An electronic brake system includes, a pressure sensor including a first pressure sensor configured to measure a hydraulic pressure of the accumulator, a second pressure sensor configured to measure a hydraulic pressure of the first hydraulic circuit, and a third pressure sensor configured to measure a hydraulic pressure of the second hydraulic circuit, a driver including one or more apply valves and release valves configured to control the hydraulic pressures of the first hydraulic circuit and the second hydraulic circuit, a determiner configured to determine that at least one of the first hydraulic circuit and the second hydraulic circuit has failed when an absolute value of a slope of the pressure measured by the first pressure sensor is greater than a preset first threshold value and the pressure measured by the first pressure sensor is less than a preset second threshold value and a controller configured to close apply valves of the first hydraulic circuit and the second hydraulic circuit when the failure has been determined, determine that a leak has occurred in one of the first and second hydraulic circuits having an amount of pressure change greater than that of the other hydraulic circuit measured on the basis of the second pressure sensor and the third pressure sensor, and control braking using only the hydraulic circuit operating normally.

A method of determining the integrity of an electric or hydraulic energy source of a braking control system. The energy source is charged or discharged, and two or more measurements of voltage or hydraulic pressure are taken from the braking control system. A difference between at least two of the measurements is determined in order to determine a change or rate of change in voltage or hydraulic pressure caused by the charging or discharging of the energy source. The integrity of the energy source is determined by checking whether the change or rate of change in voltage or hydraulic pressure meets predetermined criteria. The check may comprise comparing the change or rate of change of the voltage or hydraulic pressure to a threshold—for instance checking whether the change exceeds a threshold, or falls between an upper threshold and a lower threshold.

The invention discloses a brake system for a new energy vehicle. The brake system comprises a brake device with a brake and an automobile electronic stability control system body connected to a vehicle control unit, the brake device comprises a pedal body and a pressure sensing module assembly, the pressure sensing module assembly is connected with the pedal body and a driving position floor, thepressure sensing module assembly is electrically connected with the vehicle control unit, and the vehicle control unit is connected with the brake. Operation information of a driver is fed back to thevehicle control unit through the pressure sensing module assembly arranged at a driving position, the vehicle control unit judges the braking intention of the driver by analyzing the pressure signalsof all the sensors and through a control strategy and feeds back the braking intention to the automobile electronic stability control system of the automobile, then the brake is electrically controlled, and finally automobile braking is achieved.

The invention discloses an electric braking electromechanical drive architecture for an aircraft and a braking force control method. Each electromechanical driver in a driving control architecture isrespectively connected with an electromechanical actuator on each machine wheel brake apparatus, and simultaneously receives a left machine wheel braking integrated instruction and a right machine wheel braking integrated instruction from a first braking control and monitoring unit and a second braking control and monitoring unit. Each main wheel remote data concentrator mounted on each undercarriage wheel axle transfers the generated signal to the first braking control and monitoring unit or the second braking control and monitoring unit on the same side of the aircraft. According to the electric braking electromechanical drive architecture disclosed by the invention, the performance of a braking system can be ensured to the greatest degree in a multi-failure state of the aircraft, the drive architecture has extremely high safety, respectively and independently controlled redundancy advantages of multiple electromechanical actuators in the braking system are fully achieved, failure isolation and redundancy management abilities of the aircraft electromechanical braking system and the system reconstruction capability in a failure state are improved, the fault tolerance and mission reliability are enhanced, and the aircraft braking safety is ensured.

The invention discloses a control method and a control system for a vehicle trailer, and relates to the technical field of vehicle trailer control. The control method comprises the following steps: 101, when a power domain control unit PDCM is normal, the PDCM responds to an instruction of entering a trailer mode, and controls an electronic parking brake unit EPB to release calipers; executing the trailer, wherein the PDCM controls the vehicle to brake according to the vehicle speed and the duration of the trailer; 102, when the PDCM breaks down, an integrated brake control unit IPB responds to an instruction of entering a trailer mode, and the EPB is controlled to release calipers; and the IPB controls the vehicle to be braked according to the vehicle speed and the time length of the trailer. When any one of the PDCM and the IPB is damaged due to vehicle collision, it can still be guaranteed that the vehicle enters the trailer mode. When the trailer is executed, the PDCM and the IPB can control the vehicle to brake according to the vehicle speed and the duration of the trailer, so that a motor controller is prevented from being broken down by reverse electromotive force, and a vehicle electric control system is prevented from being heated and damaged.

Disclosed herein are control apparatus for electronic parking brake system and control method thereof. The control apparatus for electronic parking brake system and control method includes an inputter configured to receive an abnormal operation signal from an electronic stability control (ESC) system when a vehicle stopping control function is abnormally performed in the ESC system; a determiner configured to determine whether an operation availability signal of an electronic parking brake (EPB) system is input from the EPB system, when the abnormal operation signal is input; and a controller configured to transmit a control command to the EPB system to activate the EPB system and have the EPB system perform a braking operation, when the operation availability signal of the EPB is input.

The friction engagement device connects the input shaft and the output shaft to transmit a driving force from a driving source from the input shaft to the output shaft. The friction engagement device includes a housing, a friction engagement portion, a piston, an oil pump, and a motor. The housing is disposed between the input shaft and the output shaft. The friction engagement portion is disposed in the housing and composed of a plurality of friction components. The piston is disposed at one side of the friction engagement portion for pressing the friction engagement portion. The oil pump is used to operate the piston. The motor is used to drive the oil pump. In the friction engagement device, abnormal wear of the friction components of the friction engagement portion is detected by monitoring a value of an operation parameter of the friction engagement device.

The embodiment of the invention provides an automobile brake control method and device and an automobile. The method comprises the steps: carrying out fault monitoring on an automobile brake system in real time; acquiring automobile working condition information when the automobile braking system is in a fault state; generating a corresponding failure judgment result according to the automobile working condition information in the fault state; and when judging that the automobile working condition information meets the reverse dragging braking condition corresponding to the failure judgment result after the braking system breaks down, generating a reverse dragging braking instruction corresponding to the reverse dragging braking condition and sending the instruction to a motor controller, so that the motor controller executes reverse dragging braking according to the reverse dragging braking instruction. When the braking system fails or the performance is reduced to a certain degree, the motor is controlled to execute reverse dragging braking, and therefore the safety of the automobile is effectively improved.

A brake control apparatus according to an embodiment of the present disclosure includes a braking device configured to generate a braking pressure based on a hydraulic pressure to provide a main braking force to a vehicle; and a controller configured to control at least one control module selected based on the speed of the vehicle among a plurality of control modules including an engine control module (EMS) of the vehicle, a motor control module and a parking brake control module to provide an auxiliary braking force to the vehicle when the braking device is in an abnormal state.