II. Functions:

1. The equipment adopts the electric power steering system of the original Great Wall ORA pure electric car. It is installed on the bench without changing the relative layout position of the original vehicle, and the low-voltage control lines are all original vehicle parts with increased length, so as to intuitively understand the main components such as front suspension damping, steering column, rack and pinion steering gear, electric power steering gear, electric power control module, etc. It can help students understand the composition and connection relationship of electric power steering system components as soon as possible.

2. The EPS electric power steering system applies the latest electronic technology and high-performance motor control technology to the automobile steering system on the basis of the mechanical steering system. The EPS system is based on the original automobile steering system, modified and added the following parts: EPS electronic control unit, torque and rotation angle sensor, EPS motor, etc.. The transmission mechanism of the system is driven by an electric motor, replacing the traditional mechanical hydraulic mechanism. It can provide the driver with real-time steering wheel assistance in various environments. The detection port and socket outlet of the bogie power steering module are the same as those of the original vehicle, and the control signal is directly measured in the original position.

3. EPS electric power steering system consists of the following parts: (a) torque and angle sensor, (b) vehicle speed sensor, (c) EPS electronic control unit, (d) EPS motor, (e) related mechanical structure. The EPS system is powered by the EPS motor, and the power is adjusted and controlled in real time by the EPS electronic control unit. Providing different assistance according to different vehicle speeds can improve the steering characteristics of the vehicle, reduce the control force in parking spaces and low-speed driving, improve the steering control stability in high-speed driving, and then improve the active safety of electric vehicles.

4. The training bench is equipped with a teaching board, which fully displays the working principle diagram of the electric power steering system, and installs the detection terminals. With the help of tools such as multimeter, the parameter changes in various states can be detected in real time. The length of the teaching board shall not be less than 1600mm, which can meet the needs of two students' detection and learning in different parts at the same time.

5. The training bench is composed of a platform and a teaching board. The platform is placed horizontally, and the main components are installed. Four casters, two universal wheels and two directional wheels are installed at the bottom of the platform, which can move flexibly. Universal casters with self-locking device can be fixed in position. And casters have small rolling resistance and wear resistance.

6. The training bench is also equipped with a mainstream electric power steering gear, which is displayed by split slicing, so as to clearly display the internal structure and working principle of the electric power steering gear.

7. Equipped with mechanical in-situ design. The mechanical open circuit fault is realized by connecting the replaceable fuse in series in the middle of the original vehicle harness. At least 6 mechanical fault points.

8. Equipped with training instruction resources matching with the product  training project.

9. Equipped with a special clamp meter for new energy vehicles and a high-voltage test pen, which are used to control line voltage, current and other parameters measurement and orange high-voltage loop high-current non-contact measurement.

10. The bottom frame of the training bench is welded with alloy steel profiles, which is solid and reliable, and the size of the main body is not less than 40*40mm. The main profiles on both sides of the front are bent and transited by semicircle arc to ensure the safety of the use process.

III. Technical Parameters:

1. Electric power steering power supply: 12V

2. Electric power steering assist motor power: not less than 200W

3. External working power supply of the equipment: 220V AC, power not more than 500W

4. Equipment working temperature: -20°~+40°

5. Dimensions of the platform (mm): not less than 1600*1200*1300 (length*width*height)

6. Dimensions of the teaching board (mm): not less than 1600*700*1730 (length*width*height)

IV. Basic Configurations:

1 piece of steering wheel and steering column assembly, 1 piece of electric power steering with tie rod assembly, 1 set of front subframe, 1 set of front suspension assembly, 2 pieces of front wheels, 1 piece of electric power steering for electric vehicles (for section display), 1 piece of auto clamp meter, 1 piece of high voltage test pen, 1 set of movable platform and teaching board.