Electromagnetic retarder and control method of autocar wheel side
Technical Field The invention relates to a modern car brake system applied to the braking device, in particular to means for mounting a wheel side of the car retarder, in particular relates to the braking torque generated by the principle of an electromagnetic slow-speed device. Background Art In the prior art, which is provided with the hydraulic braking system of the car in general, the majority of the disc brake, it is through the friction plate and the friction between the brake disc to the reduction of the speed of the car, to realize the vehicle brake. The disc brake of the car under the working condition of high-speed emergency braking work, will not only produce harsh noise, and wear of the friction plates is relatively large, the braking effect than low-speed brake is good; and in urban frequent non-emergency braking conditions, but it also needs the driver constantly low intensity steps on brake pedal, accompanied by the friction disc and the braking disc by continuous contact between the friction, brake generates temperature rise, a thermal-recession-resistant, reduced performance and safety performance of the brake. Content of the invention The purpose of the invention is to overcome the deficiency of the prior art, provides a stable and reliable performance, can reduce the number of times of braking, the brake temperature rise of the brake is reduced, improving the brake system to the service life and the safety of driving a non-contact type of car the wheel-side electromagnetic retarder and its control method. The invention car wheel side electromagnetic retarder the technical scheme is: coupling are arranged on a transmission shaft, is connected with the car-coupling, the outer sleeve can rotate the drive shaft and the brake disc of the steering knuckle, around the coil and the iron core of the friction brake with ABS is fixed to the knuckle, located in the rotation of the brake disk in the core plate, an operating handle is connected with the coil by the controller. The invention car wheel side electromagnetic retarder control method adopts the technical scheme is:of the operating handle the controller receives the brake signal and sensor feedback speed signal; judging the car is an emergency braking or non-emergency braking, non-emergency braking, the controller sends a signal to the control of the magnitude of the coil current, the controller sends a signal to the emergency braking of the control of the coil current and the magnitude of the friction brake with ABS the size of the liquid pressure; brake disc rotating in the coil opposite to the rotating direction of the braking force, the drive shaft rotational speed drop, the car brake. The beneficial effect of the invention is: 1, the wheel-side of car of the present invention is an electromagnetic retarder a nonfriction brake, is a kind of using electromagnetic principle to produce braking moment of the retarder. Change the car in the prior art through the mechanical brake system as a result of the frequent braking and shorten the service life of the braking system caused by the temperature rise of the friction brake and to reduce the brake performance of the brake, the action number of the brake can be reduced, at the same time also the temperature rise of the friction brake can be reduced, improving the performance of a brake system and safety of driving. 2, this invention adopts the two control modes: one is the operating condition of the emergency braking, the state of the car is in the high-speed, need to rapidly stop the vehicle; the other is a non-emergency brake operating condition, the car is in normal running state, does not need to rapidly stop the vehicle, the speed of the car only need to put down. Description of drawings The following Figures and embodiment with the further detailed description of this invention. Figure 1 is an elevational view of the car wheel side electromagnetic retarder; Figure 2 is a right view of fig. 1; Figure 3 is a head-up map of Figure 1; Fig. 4 are graphs 3 A-Aa cross-sectional view in; Figure 5 is a schematic diagram of a control system for wheel-side electromagnetic retarder; Figure 6 is a control flowchart of the control method of this invention in the non-emergency braking; Figure 7 is a control flow chart of the control method of this invention in the emergency braking. Mode of execution As shown in Figure 1-4, the drive shaft 1 is mounted on the coupling 5, the coupling 5 is connected with the car half shaft, transmits the power to the transmission shaft 1. Drive shaft 1 of the rotary sleeve 2 and rotor 3, the drive shaft 1 by keys 10 are connected with a flange disc 11, a loose ring 12, six angular slotted thin nut 15 and cotter pin 16 is located in the drive shaft 1 to the end of the flange 11 is fixed on the drive shaft 1 on. Flange 11 through the bolt 13, the nut 14 and the brake disc 3 is connected; the driving shaft 1 with the steering knuckle 2 is arranged between the needle bearing 9, the retainer ring 6, 7, 8 the single double-row needle bearing 9 is fixed to, prevent the lubricating oil is not leaked, the drive shaft 1 to the knuckle 2 from rotating. The friction brake with ABS 21 through bolt and the steering knuckle 2 is connected fixedly. As shown in Figure 5, wound with a coil 19 of the iron core 4 is fixed to the knuckle 2 is, the brake disc 3 located in the iron core of the rotating disc 4 in, coil 19 by the controller 17 is connected with the operating handle 18, the controller 17 is connected with the vehicle speed sensor 20 and the indicator lights 22, the controller 17 is internally provided with a control circuit. As shown in Figure 1-5, control, controller 17 to receive an operating handle 18 of the brake signal and the sensor 17 the feedback speed signal; judging the car is an emergency braking or non-emergency braking, non-emergency braking the controller 17 sends a signal the control of the coil 19 the magnitude of the electric current of, emergency braking the controller 17 sends a signal the control of the coil 19 and the magnitude of the electric current of the friction brake with ABS 21 the size of the liquid pressure. The brake disc 3 in the coil 19 is rotated in an opposite direction of rotation the braking force, the drive shaft 1 in rotation speed, the car brake. As shown in Figure 1-5 and Figure 6 shows, when the car non-emergency brake, a control handle 18, the controller 17 receives the control signal and the vehicle speed sensor 20 signal, rapidly to the iron core 4 of the coil 19 energized, access the maximum 25A current to the coil 19 in. Iron core 4 is generated in the magnetic field, the driving of the vehicle, so as to brake rotor 3 rotating, the brake disc 3 to generate a magnetic field of the iron core 4 rotary cutting line in, therefore the brake disc 3 in the eddy current is generated, so as to produce one and opposite to the rotating direction of the brake force, vehicle transmission shaft 1 is decreased rapidly, and the rotational speed of, the vehicle speed sensor 20 detecting car wheel speed, and the wheel speed v=30km/h comparison, if the car wheel speed of less than 30 km/h, by the controller 17 to cut off a current signal; if the car wheel speed is greater than 30 km/h, the slip rate of the wheel s is calculated, if the slip rate s is greater than 0.15, the controller 17 to reduce current signal issued, if the slip rate s is less than 0.15, the controller 17 increases the current signal issued, until the car wheel speed is lower than the 30 km/h, cut off the current, under the action of the braking force, so as to realize a smooth braking of the car. As shown in Figure 1-5 and Figure 7 shows, when the car need of emergency braking, controller 17 according to the driver starting operating handle 18 and vehicle speed sensor 20 signal, access 25A maximum current to the coil 19 in, the brake disk 3 with the rotation of the opposite to the rotating direction of the braking force. Controller 17 sends the hydraulic control signal, friction brake 21 the hydraulic pressure in the hydraulic cylinder of the magnitude of the pressure, so as to control the friction brake with ABS 21 of the braking torque is generated. In this way, the brake disc can be 3 rotary friction brake torque and the friction brake with ABS 21 of the eddy current brake torque generated by the joint act on the brake disc 3 is, the car is in the best brake state. By the vehicle speed sensor 20 detecting car wheel speed, the wheel speed v=30km/h comparison, if the car wheel speed of less than 30 km/h, by the controller 17 to cut off a current signal; if the car wheel speed is greater than 30 km/h, the slip rate of the wheel s is calculated, if the slip rate s is greater than 0.15, the controller 17 is issued with ABS reduce the friction brake 21 hydraulic pressure signal, if the slip rate s is less than 0.15, the controller 17 sends out hydraulic signal is increased; when the car speed is lower than the 30 km/h, the car wheel speed and 0 km/h comparison, if the car wheel speed is greater than 0 km/h, to continue to provide hydraulic pressure until the car stationary, so as to realize a smooth braking of the car. The invention discloses an electromagnetic retarder arranged on autocar wheel side and a control method thereof. A shaft coupling is arranged on a transmission shaft; the shaft coupling is connected with a semi shaft of an autocar; a rotatable slewing journal and a brake disc are sleeved outside the transmission shaft; an iron core winded with a winding and a friction detent provided with an ABS are fixed on the slewing journal; a rotation disc face of the brake disc is positioned in the iron core; and the winding is connected with an operation handle by a controller. The controller receives brake signals of the operation handle and speed signals fed back by a sensor, judges that whether the autocar has an emergency brake or a non-emergency brake, emits signals to control the size of current led to the winding during the non-emergency brake, and emits signals to control the size of current led to the winding and the size of liquid pressure of the friction detent during the emergency brake. The brake disc generates brake force opposite to the rotation direction when rotating in the winding. The invention can reduce action times of the detent, reduces temperature rise of the friction detent, and enhances the performance of a brake system and the road security. 1, a car wheel side electromagnetic retarder, including the drive shaft (1) is provided with coupling (5), coupling (5) is connected with the car axle shaft, is characterized in that: the transmission shaft (1) rotation of the steering knuckle is (2) and brake discs (3), around the coil (19) of the iron core (4) and the friction brake with ABS (21) is fixed to the knuckle (2) is, the brake disc (3) to the rotating disc (4) in, coil (19) by the controller (17) is connected with the operating handle (18). 2, the car wheel side electromagnetic retarder according to Claim 1, which is characterized in that: the transmission shaft (1) to key (10) are connected with a flange disc (11), the flange (11) is connected with the brake disk (3); the drive shaft (1) and steering knuckle (2) is arranged between the needle roller bearing (9). 3, car wheel side electromagnetic retarder according to Claim 1, which is characterized in that: the controller (17) is connected with the vehicle speed sensor (20) and indicator (22), the controller (17) is internally provided with a control circuit. 4, a car wheel side of the control method of an electromagnetic retarder, its characteristic is to adopt the following steps: A) controller (17) to receive an operating handle (18) of the brake signal and to the sensor (17) the feedback speed signal; B) judging the car is an emergency braking or non-emergency braking, non-emergency braking the controller (17) sends out signals to control the access coil (19) the magnitude of the electric current of, emergency braking the controller (17) sends out signals to control the access coil (19) and the magnitude of the electric current of the friction brake with ABS (21) the size of the liquid pressure; C) brake disc (3) in the coil (19) is rotated in an opposite direction of rotation the braking force, make the drive shaft (1) rotational speed drop, the car brake. 5, wheel-side a kind of car control method of an electromagnetic retarder according to Claim 4, which is characterized in that: step B) in the non-emergency braking, the largest inject 25A current to the coil (19) in, the brake disc (3) to produce braking force in the opposite direction, then the vehicle speed sensor (20) detecting wheel speed, if the wheel speed is less than 30 km/h, by the controller (17) a cut-off of the current signal; if the wheel speed is greater than 30 km/h, calculates the slip rate of the wheel, if the slip rate is greater than 0.15, the controller (17) to reduce current signal issued, if the slip rate is less than 0.15, the controller (17) a current signal is increased, until the wheel speed is lower than the 30 km/h cut-off of the current end of the brake. 6, a car wheel side of the control method of an electromagnetic retarder according to Claim 4, which is characterized in that: step B) in the emergency braking, the largest inject 25A current to the coil (19) in, the brake disc (3) the braking force in the opposite direction produced by the rotation, the controller (17) of the hydraulic control signal to control a friction brake with ABS (21) of the braking torque is generated, the brake disk (3) to rotate to produce the brake torque and the friction brake (21) acting on the common brake torque generated by the brake disc (3) the upper; and then the vehicle speed sensor (20) detecting wheel speed, if the wheel speed is less than 30 km/h, by the controller (17) for cutting off a current signal is issued, if the wheel speed is greater than 30 km/h, calculates the slip rate of the wheel, if the slip rate is greater than 0.15, the controller (17) is reduced into a friction brake (21) of the hydraulic pressure signal; if the slip rate is less than 0.15, the controller (17) a hydraulic signal is increased; when the wheel speed is lower than the 30 km/h and greater than 0 km/h time, re-offer hydraulic pressure until the stop brake.