Advantages of electric power steering
Update time:2020/1/9 14:23
Compared with traditional hydraulic power steering systems, electric power steering systems have the following advantages:
1. The motor provides assistance only when steering, which can significantly reduce fuel consumption
The traditional hydraulic power-assisted steering system uses the engine to drive the steering oil pump, which consumes part of the engine's power whether it is steering or not. The electric power steering system only assists the motor when steering, and does not consume energy when not steering. Therefore, the electric power steering system can reduce the fuel consumption of the vehicle.
A comparison test with the hydraulic power steering system shows that: when not steering, electric power steering can reduce fuel consumption by 2.5%; when steering, it can reduce 5.5%.
2. The amount of steering assistance can be adjusted by software, which can take into account the steering lightness at low speeds and the steering stability at high speeds, and has good return performance.
The steering assistance provided by the traditional hydraulic power steering system cannot be changed with the increase of vehicle speed. This allows the vehicle to have good steering portability at low speeds, but the steering wheel is too light at high speeds, which results in the phenomenon of steering "fading", and the driver lacks a significant "road feel", reducing the vehicle at high speeds. Stability and driver safety.
The power assistance provided by the electric power steering system can be easily adjusted by software. At low speeds, the electric power steering system can provide greater steering assistance and provide steering lightness for the vehicle. As the vehicle speed increases, the steering assistance provided by the electric power steering system can be gradually reduced. The steering force will gradually increase, so that the driver will feel a clear "road feel" and improve the stability of the vehicle.
The electric power steering system can also apply a certain amount of additional return torque or damping torque, so that the steering wheel can accurately return to the middle position at low speeds, and it can suppress the steering wheel oscillation and overshoot during high speed return to normal, taking into account the vehicle 、 Return performance at low speed.
3. Compact structure, light weight, good assembly line, easy maintenance
The electric power steering system eliminates hydraulic steering oil pumps, cylinders, hydraulic pipelines, oil tanks and other components, and the motor and reduction mechanism can be integrated with the steering column and steering gear, making the entire steering system compact and lightweight. It has good assembly performance, saves assembly time, and is easy to maintain.
4. Through the setting of the program, the electric power steering system is easy to match with different models, which can shorten the production and development cycle.
Due to the above-mentioned advantages of the electric power steering system, it has been more and more widely used in recent years.
The electric power steering system is based on a mechanical steering system, and is equipped with a motor and a reduction mechanism, a torque angle sensor, a vehicle speed sensor and an ECU electronic control unit.
