918results about How to "Shorter braking distance" patented technology

A brake system for a vehicle can be operated without a driver. It has a service brake device, a parking brake device and an emergency braking device. At least the wheel brake devices of the wheels of one axle of the vehicle have emergency brake actuators which switchover the assigned wheel brake devices into the braking state as a result of the triggering of an emergency braking operation. The emergency braking operation can be triggered either manually by means of an emergency operator control device or automatically by means of a monitoring device if the latter has detected an unacceptable operating state of the vehicle in the driverless operating mode.

A collision between a vehicle and an obstacle is estimated, and based on the estimation result, vehicle deceleration control is performed by a brake actuator to reduce the collision and vehicle wheel load is controlled by a suspension actuator.

The invention relates to an urban tram braking system. The system comprises a braking instruction generation system, a braking control system and an anti-skid system, wherein the braking instruction generation system comprises a braking electronic control unit (BECU) and a braking control unit (BCU) and sends a braking instruction to the BECU; the BECU calculates required braking force according to the braking instruction and loading force detected by a loading pressure sensor and provides the braking force for a traction control unit; the traction control unit feeds a dynamic braking force signal back to the BECU; the BECU calculates air braking force which is needed to be supplemented and controls the BCU to generate braking cylinder pressure so as to realize braking control; the braking instruction generation system is provided with a driver controller, an emergency braking switch and a logic control unit connected with the emergency braking switch; the anti-skid system comprises a speed sensor arranged on a wheel axle and an anti-skid exhaust valve arranged on a braking cylinder pipe; the speed sensor detects a speed signal and transmits the speed signal to the BECU; and the BECU controls the action of the anti-skid exhaust valve according to the speed signal.

The invention provides a skid-proof pin including a solid construction and an automobile equipped with the skid-proof pin; the skid-proof pin is embedded into a pin hole (9) cast on a tire surface of automobile tires. The skid-proof pin (1) comprises: a main body (5) which is made of a first material and comprises a soleplate (3) and a bar portion (4); and a hard metal ceramic member (2) which is made of a second material and is present in the main body. Section shape of the hard metal ceramic member is an irregular hexagon comprising in a direction perpendicular to length (L<N>) of the pin; a first pair of long sides (21, 23) and a second pair of long sides (22, 24) opposite to the first pair of long sides, and internal angles (K1 and K2) which unfold towards each other between said two pairs of sides; the internal angles (Ka and K2) are not less than 130 degrees and not more than 170 degrees; and two short sides (25, 26), between which a longitudinal distance is present which is larger than a transverse distance (W<W>) between peaks of two pairs of long sides.

The invention provides a vehicle braking auxiliary device based on aerodynamics. The vehicle braking auxiliary device based on aerodynamics comprises an ECU (electronic control unit), at least two link mechanisms, a fixed shaft, a front spoiler, a rear spoiler, at least two step motors, at least three hydraulic cylinders, a vehicular speed sensor, a turning angle sensor, at least two position sensors and at least three pressure sensors. The vehicular speed sensor, the turning angle sensor, the position sensors and the pressure sensors are all connected with an input end of the ECU, each step motor and each hydraulic cylinder are connected with an output end of the ECU, one end of each link mechanism is correspondingly connected with an output shaft of one of the step motors while the other end of each link mechanism is in transmission connection with the rear side of the front spoiler, the front spoiler is capable of rotating around the fixed shaft which is arranged on the front side of the front spoiler, and a piston rod of each hydraulic cylinder is connected with the rear spoiler. The vehicle braking auxiliary device based on aerodynamics is capable of instantly reducing vehicular speed to some extent and increasing ground adhesion of a vehicle to enable the vehicle to keep stable in high-speed emergency braking, braking distance can be shortened, and safety is improved.

Action force of a wheel is measured in order to measure the road surface frictional force, vertical drag, road surface friction coefficient, etc. Means for making these measurements can be constituents of an antilock brake system, traction control system, etc. These constituents may also serve as devices for measuring stresses generated in other structures. In a specific example, axle of a vehicle is formed with a hole, a stress detection sensor is installed in the hole and secured in position with the aid of a spacer element, and a detection signal from the stress detection sensor is processed in a signal processing circuit.

The invention discloses a collision avoidance system and an automatic braking method of an electric automobile. The collision avoidance system comprises an information collecting module, an information processing module, an intelligent decision making module, a regenerative braking module and a mechanical braking module, wherein the information collecting module is used for real-timely collecting the distance between the electric automobile and a front vehicle or an obstacle and a current running speed; the information processing module is used for real-timely calculating rear-end time of the electric automobile and the front vehicle or the obstacle, regenerative braking safe time and mechanical braking safe time; the intelligent decision making module is used for deciding whether normal running is continuously kept or whether a regenerative braking mode is started or whether a combined braking mode of the regenerative braking mode and a mechanical braking mode is started according to the rear-end time of the electric automobile and the front vehicle or the obstacle, the regenerative braking safe time and the mechanical braking safe time; the regenerative braking module is used for starting regenerative braking for the electric automobile according to a regenerative braking mode starting signal provided by the intelligent decision making module; and the mechanical braking module starts mechanical braking for the electric automobile according to a combined braking mode starting signal provided by the intelligent decision making module.

The invention discloses a self-adaptive autonomous emergency brake (AEB) control algorithm based on road adhesion. The self-adaptive autonomous emergency brake control algorithm based on the road adhesion predicates collision risk between a vehicle and a forward obstacle though obtaining forward obstacle information, information of the vehicle and a road adhesion coefficient and makes a final pre-warning and autonomous braking decision by taking control input of a driver into consideration so as to remind the driver of adopting forward collision avoidance control or avoid collision between the vehicle and the forward obstacle or reduce collision degree between the vehicle and the forward obstacle by using autonomous braking interference if necessary. According to the self-adaptive autonomous emergency brake control algorithm based on the road adhesion, on the premise of not changing the configuration of the existing vehicle-mounted sensor, the road adhesion coefficient is estimated in real time; the pre-warning and autonomous braking opportunity can be automatically adjusted in a safe distance model according to the road adhesion coefficient so that the forward collision avoidance safety on road surfaces with various road adhesion coefficients is ensured and false alarm or false brake interference is avoided; driving safety and good driving experience are both achieved; and during driver brake interference, the self-adaptive autonomous emergency brake control algorithm based on the road adhesion can apply necessary brake assistance according to the calculated collision risk.

The invention discloses a vehicle auxiliary braking control method which comprises the steps that an accelerator pedal signal and a brake pedal signal of a vehicle are obtained; the state of an accelerator pedal and the state of a brake pedal are judged according to the accelerator pedal signal and the brake pedal signal; if the accelerator pedal is in a loose state and the brake pedal is in a depressing state, the current speed is further detected for the vehicle; if the current speed of the vehicle is larger than a preset speed, the opening size of an exhaust valve of a vehicle engine is adjusted, so that auxiliary braking is conducted on the vehicle through the engine. According to the embodiment of the vehicle auxiliary braking control method, frequent use of a brake disc for braking can be reduced, the safety of the vehicle in driving is improved, and the service life of the brake is effectively prolonged. The invention further discloses a vehicle auxiliary braking control system and a vehicle including the same.

The present invention relates to a fall protection device used in the process of climbing steel tower of power transmission line. Said full protection device includes the following several portions: large hanger, small hanger, endless rope, delta wire-lock fastener, pear-shaped fastener, small tackle and safety hook. Said invention also provides a fall protection method by using said fall protection device and its concrete operation steps.

The invention relates to a method and system for braking a railway vehicle, which have the advantages of higher brake force, shorter idling braking time and brake cylinder boosting and relieving time and capabilities of shortening the braking distance, arranging passenger trains and adjusting the brake force according to the change of the weight of the vehicle. A high-friction-coefficient composition brake shoe with a higher friction coefficient is adopted, and the pressures of the brake cylinder and the brake shoe are controlled on the basis of measurement of the vehicle load by using a sensing valve, so that stepless control of the brake force of a quick freight car is realized; and the idling braking time and the brake cylinder relieving time are shortened by changing the inflation anddeflation time of the brake cylinder. The invention provides a method and system for braking a quick railway freight car. By adopting the method and system, the stepless change of the brake force canbe realized with the load increase and decrease change of the vehicle at the same time of improving the brake force and shortening the idling breaking time, therefore the safety traveling braking distance is ensured; meanwhile, the device has the advantages of high reliability, high vibration insulation, high dynamic performance, higher linearity and high sensitivity.

The invention provides a braking control method of a vehicle. The vehicle comprises a motor and a mechanical braking mechanism. The method comprises the following steps of outputting the motor braking torque by the motor to brake the vehicle; in the process of braking, obtaining a wheel slip rate according to a speed signal and a wheel rotation speed signal; judging whether the wheel slip rate is within a preset range; if the wheel slip rate is not within the preset range, further judging whether the wheel slip rate is less than the lower limit of the preset range; if the wheel slip rate is less than the lower limit of the preset range, judging whether to increase the motor braking torque or combine with the mechanical braking mechanism to brake the vehicle to shorten the braking distance of the vehicle according to the motor braking torque and expected braking torque. By applying the method, the braking distance can be shortened to the maximum, and locking and slipping of wheels are avoided, so that the braking safety of the vehicle is improved. The invention also provides a braking control system of the vehicle.

The invention provides an elastic high-speed brake lining, consisting of a steel backing (1), a brake block (2), a dovetail plate (3), a gasket (4), a disk spring (5), a guide sleeve (6), a bushing (7) and a rivet (8). The elastic structure high-speed brake lining provided by the invention has the advantages of high mechanical strength, small wearing capacity, stable friction performance, good thermal stability, good heat conductive performance, high dynamic moment and static moment, no noise, seawater corrosion resistance, sand wind prevention, excellent salt mist resistance and the like. Due to the elastic structure, the brake block of the high-speed brake lining is protected from eccentric wear caused by insufficient contact of the brake block of the high-speed brake lining and the surface of a brake disc, so that a high-speed train can brake smoothly, and the braking distance is short.

The invention relates to a control method of a vehicle manual control accelerator with a cruise function and a system thereof. The method comprises a manual control accelerator control method, a manual control cruise control method and a foot accelerator control method, wherein the foot accelerator control method is to maintain the original foot accelerator control system; the manual control accelerator control method is to additionally arrange a manual control accelerator control system which can be individually controlled at the same time; and the manual control cruise control method is to additionally arrange a cruise control system at the same time. The system comprises a manual control accelerator system, a manual control cruise system, a foot accelerator system, a foot control brake system, and a co-control system of the foot control brake system, the manual accelerator system and the manual control cruise system.

The invention discloses a train anti-skid control method based on an optimal slip rate and a control device thereof. The method comprises the following steps: firstly, according to a braking cylinderpressure, calculating a locomotive braking force; secondly, according to a non-linear relationship between an adhesion coefficient and a slip rate, calculating the optimal slip rate through an extremevalue search algorithm; and according to a difference value of an actual slip rate and the optimal slip rate, through running a PID control algorithm, solving to obtain a braking force moment by an anti-skid valve control panel; based on the braking force moment, controlling an anti-skid valve switch to exhaust air or re-charge air to the braking cylinder, adjusting the pressure of the braking cylinder until the braking force moment is solved. The anti-skid control method is capable of realizing the optimal slip rate as a control objective, through adjusting parameters of a controller, enabling a wheel slip rate to be near the optimal slip rate, and guaranteeing that a train has the good anti-skid control effect while driven in different rail environments.