129results about "Braking pressure measurements" patented technology

The invention belongs to the field of locomotive brake control and relates to a locomotive brake control system and control method. The locomotive brake control system comprises an average pipe control system and a brake cylinder control system, wherein the average pipe control system can compare the brake cylinder pre-control pressure with the average pipe pre-control pressure, and outputs a large pressure as the average pipe pressure, the brake cylinder control system can compare the brake cylinder pre-control pressure with the average pipe pressure and output large pressure to serve as thebrake cylinder pressure to achieve braking. The locomotive brake control system is advantaged in that redundancy of two control systems can be realized.

The invention discloses a multi-mode electronic hydraulic brake boosting system and a control method. When the power assisting system fails, an emergency mechanical braking mode is achieved through structural redundancy, under the normal power assisting mode, common braking and emergency braking are divided according to the strength requirement of a brake, and the common braking power assisting mode and the emergency active pressurizing mode are controlled respectively. Accurate assistance can be provided during general braking so that the pressure of the brake master cylinder can accurately follow the target pressure, pressure buildup of the brake master cylinder can be completed more quickly during emergency braking, braking force is output to the maximum extent, the system response timeof the emergency braking working condition is shortened, the braking capacity is improved, and traffic accidents are avoided. The design of the multi-mode power assisting system can accurately trackthe braking intention of a driver, the intelligent degree of switching between different power assisting modes is high, the rapidity and accuracy of braking response and the safety of a vehicle are improved, and the multi-mode power assisting system has very high practical application value.

The invention relates to an electric apparatus of a vehicle having an at least partly electric braking and steering device comprising an electric or electromechanical steering device (26) with or without a continuous mechanical connection between a steering wheel (28) and a steering gear (30) and having an electronic steering control device and an electric steering actuator (72), and an electropneumatic service brake device (124) which comprises an electropneumatic service brake valve device (1), an electronic brake control device (EBS-ECU), electropneumatic modulators (114, 116) and pneumatic wheel brake actuators (118, 120), wherein the electropneumatic service brake valve device (1) has a service brake actuating member (10) and, within at least one electric service brake circuit, at least one electric channel (130) with at least one electric brake transducer (67) which can be actuated by the service brake actuating member (10) in order to output actuating signals in a manner which is dependent on an actuation of the service brake actuating member (10), and at least one electronic evaluation device (FBM-ECU) which receives the actuating signals and inputs brake request signals into the electronic brake control device (EBS-ECU) in a manner which is dependent on the actuating signals. The invention is characterized in that the electronic evaluation unit (FBM-ECU) is integrated into the electronic steering control device, or the electronic steering control device is integrated into the electronic evaluation device (FBM-ECU).

A method, system, and apparatus to determine a malfunction or an abnormal pressure condition in a hydraulic system over a time period are provided. The method, system, and apparatus include monitoring hydraulic accumulator charge time, hydraulic accumulator discharge time, and hydraulic pump pressure over the time period, and determining whether the monitored hydraulic accumulator charge time, hydraulic accumulator discharge time, and hydraulic pump pressure are within respective predetermined ranges. A maintenance notification is output responsive to at least one of the monitored hydraulic accumulator charge time, hydraulic accumulator discharge time, and hydraulic pump pressure being outside the respective predetermined ranges during the time period.

A hydraulic braking system and a method for operating the hydraulic braking system. The hydraulic braking system has a first pressure generating unit and a second pressure generating unit. The first pressure generating unit is hydraulically interruptibly and uncircumventably connected to the second pressure generating unit via a first interrupting element in such a way that with the first interrupting means in a closed position, a hydraulic connection between the first and second pressure generating unit is no longer possible.

Provided are an electronic brake system and a method of controlling the same. The electronic brake system includes a pedal input unit configured to receive a pedal force according to a driver's braking intention, an estimating unit configured to estimate a temperature and a friction coefficient of a brake disk pad, and a control unit configured to correct a braking target pressure according to the driver's braking intention on the basis of the estimated temperature and friction coefficient of the brake disk pad.

The present disclosure discloses a brake control system for use in a vehicle and a control method thereof. A brake control system may be configured to include a brake pad for braking the vehicle by pressing a brake disc provided in the vehicle, a measuring apparatus for measuring the vehicle speed, the wear level of the brake pad, the traveling distance of the vehicle, the braking distance of the vehicle, and the braking pressure applied by the brake pad to the brake disc at braking, and a controller connected with the measuring apparatus and for controlling an operation of the brake pad. The controller may compare an initial braking distance, which is a design value of the braking distance before initial traveling of the vehicle, with a current braking distance, which is a braking distance after traveling of the vehicle during a certain duration, and increase the braking pressure of the brake pad in response to the amount of increase in the braking distance, when the amount of increase in the braking distance, which is a difference value between the current braking distance and the initial braking distance, is out of a setting range. The brake control system may transmit and receive a wireless signal in a mobile communication network constructed according to 5G (Generation) communication.

In some embodiments, a system and / or method may reduce certain injuries resulting from a vehicle collision. The method may include opening a valve in a pressurized brake line of a brake system of a vehicle in response to a trigger. The trigger may include a set pressure value of a fluid in the pressurized brake line. The method may include allowing the fluid in the pressurized brake line to flow through a sized opening accessible through the opened valve. The sized opening may reduce a fluid pressure in the pressurized brake line verses time. The sized opening may be dimensioned to allow a flow rate of the fluid conveying through the sized opening such that the fluid pressure reduces over a period of time. The method may include reducing backpressure on a brake pedal coupled to the pressurized brake line.

A system and method for monitoring air pressure applied to a brake cylinder of a braking assembly of a railway vehicle, including an empty-load device, and an RFID transducer in communication with the empty-load device, wherein the RFID transducer is configured to measure the air pressure delivered to the brake cylinder of the braking assembly, and generate data on the air pressure delivered to the brake cylinder of the braking assembly; and a remote data monitor configured to read data from the RFID transducer.

The invention relates to a method for detecting malfunctions of an electro-actuated brake apparatus (100; 200) of a motor vehicle. The apparatus includes: an electronic control unit (50; 50'); an electro-actuated brake caliper (10; 20) electrically actuated by the electronic control unit for generating a clamping force (Fc) on a disc (15) of the brake apparatus in response to a control signal (Sp) generated by the electronic control unit. The method comprising the steps of: providing, in the electronic control unit, a functional control block (51) and a first functional block (60; 60') consisting of a numerical model representative of the electro- actuated brake caliper; providing a target signal (BT) to the functional control block for generating said control signal to operate the electro-actuated brake caliper; providing said target signal to the first functional block for generating a first signal (S1; S1') representative of a theoretical quantity associated with the numerical model representative of the electro-actuated brake caliper; comparing said first signal with a feedback signal (Sf'; Spi') representative of a real operating quantity associated with the electro-actuated brake caliper for generating an error signal to be sent to a second functional block (70) of the electronic control unit; performing, by said second functional block, an error validation check to provide information (R) on the operating state of the electro-actuated brake caliper to the electronic control unit.

The invention relates to a wear amount estimation device, a wear amount estimation method, and a wear amount estimation program for improving the estimation accuracy of the wear amount of a brake pad of a vehicle. The amount of wear function represents the amount of wear as a function of vehicle speed, brake pressure, and brake duration. When the vehicle is braked, the wear amount estimation device executes a wear amount calculation process for calculating a wear amount corresponding to the vehicle speed, the brake pressure, and the brake duration by using the wear amount function. In addition, the wear amount estimation device estimates the temperature of the contact portion of the brake pad in contact with the brake rotor on the basis of the vehicle speed, the brake pressure, and the brake duration. On the basis of the temperature of the contact part, the wear amount estimation device updates temperature history information indicating at least the temperature history of the contact part. In the wear amount calculation process, the wear amount function is variably set on the basis of the temperature history of the contact portion indicated by the temperature history information obtained at the time of the last braking.

The invention relates to a method for decelerating a vehicle train with a traction vehicle and at least one trailer vehicle with an anti-lock brake system, and to a combination of pneumatic brake systems of the vehicles of a vehicle train. In order to improve the braking behaviour of a vehicle train, the invention provides that an electronic brake control unit (30) of the traction vehicle brake system (3) detects a current vehicle deceleration actual value (z-lst), continuously compares the vehicle deceleration actual value (z-lst) with a maximum deceleration (z-Max) and in the event of the vehicle deceleration actual value (z-lst) reaching or exceeding the maximum deceleration (z-Max) limits the brake pressure (P) and makes available an information signal (45) for the respective brake electronics (31) of each trailer vehicle (6), which information signal (45) represents at least one piece of limiting status information (46), wherein the respective brake electronics (31) of a trailer brake system (4) acquire measurement signals (35) from rotational speed sensors (34), and set the brake pressure (P-A) at the wheel brakes (13) as a function of the measurement signals (34) by actuating pressure control valves (27) receive (52) the information signal (45), and, when limitation (44) of the brake pressure in the traction vehicle (5) is detected on the basis of the measurement signals(34) for each trailer axle (11, 12), determine a dynamic slip variable value (v, vRA) which represents the slip, compare (49) slip variable values (v, vRA) of all the trailer axles (11, 12) with oneanother, and close the inlet valves (32) of the respective pressure control valves (27) at least at those trailer axles (12) with the higher slip values than a control axle (11) and the currently lowest slip.