1. The power steering
power steering, as the name suggests, is to assist the driver to adjust the direction for the car, the driver hit the steering wheel hard to reduce the strength, of course, power steering in cars with safety, economy also on a role.
on the current configuration of the automotive power steering systems and information I can see, can be roughly divided into three categories, (1) One is the mechanical hydraulic power steering system; (2) one is electronic hydraulic steering system; (3) In an electric power steering system.
A mechanical hydraulic power steering system
1, hydraulic power steering systems are generally mechanical valve controlled by the hydraulic pump, tubing, pressure flow, V-belt transmission, storage tanks like member made.
2, regardless of whether the vehicle steering system that sets have to work, and the vehicle speed is low when a large steering, the hydraulic pump requires more power output to obtain a relatively large power. So, also a waste of resources to some extent. Can recall: On such a car, especially when turning at low speed, I felt the direction of relatively heavy, the engine is also more effortless. Also, because a lot of pressure of the hydraulic pump is relatively easy to damage the power system.
In addition, the mechanical hydraulic pump and the power steering cylinder components and piping, the pressure is maintained, irrespective whether the steering, the system always in operation, high energy consumption, the consumption of which is one reason for the resource is located.
Usually economical car using a mechanical hydraulic power system more.
Second, the electro-hydraulic power steering system
1, main components: storage tanks, power steering control unit, the electric pump, steering gear, steering sensor, and wherein the power steering control unit electric pump is an integral structure.
2, the working principle: electro-hydraulic steering system overcomes the drawbacks of conventional hydraulic power steering system. It is no longer rely on the use of hydraulic launchDirect belt drive, instead of using an electric pump, it is the status of all jobs by the electronic control unit according to the traveling speed of the vehicle, the steering angle of the ideal state of the calculated signal. Briefly, large steering at low speeds, the electronic control unit drives the electronic hydraulic pump higher power output at a high speed, the driver turning the steering effort; car at high speeds, the electronic control unit drives a hydraulic pump at a lower speed operation does not affect the need to play a high-speed turn at the same time, saving part of the engine power.
Third, the electric power steering system (EPS)
1, is the English name Electronic Power Steering, referred to as EPS, which uses the power generated by the motor for the power steering assist motorists. EPS configuration, although different vehicle structural member are not the same, but is generally identical. Usually a sensor, an electronic control unit, motor, reducer, mechanical steering, and animal cells is constituted by the power torque (steering).
2, the operating principle: the car in the steering torque (steering) Sensor ldquo; feel rdquo; intended to torque and direction of rotation of the steering wheel, these signals are sent to the electronic control via a data bus unit, the electronic control unit based on the transmission torque, the proposed direction of rotation of the data signal, the operation command sent to the motor controller, so that the motor rotational torque is output according to the size of the corresponding specific needs, resulting in a power steering. If you do not turn, this sets the system will not work in standby (sleep) state waits for the call. Due to the operating characteristics of the electric motor-driven power steering, and you will feel open such a car, a better sense of direction, more stable at high speeds, the saying goes, the direction is not flighty. Because they do not work when it does not turn, it also saves energy how much extent. Luxury cars generally use such a power steering system more.
Fourth, how to maintain the power steering system
1, a hydraulic machine, a lot of attention must check the usual power in the oil reservoir can not be missing, in addition, try not to bend killing time too long. In addition, if very heavy when attention turned to whether there is noise and so on, if such a situation, be sure to check for problems similar to the oil pump V-belt, and other aspects of the internal pressure.
2, electro-hydraulically, usuallyAlso pay attention to how much power the oil, when the warning light amount, must pay attention to check.
3, the electric power system, this stuff even though the structure is relatively simple, but maintain it, the naked eye can not see through, and if the direction Shen appeared to lose control of the problem, it is a way to get the right amount of equipment. Personally I have always believed that the car, the more electronic / electric stuff, the car seems more arrogance under certain conditions. He broke down, of course, to repair than to mechanical trouble, or even more money. But the advanced stuff, arm your car, your heart is also beautiful.