Direction,
For a country, acompany, and even an individual, the direction is important!
The car also like this. The steering box is themost important part of the car for the steering function. The steering box,also called the steering gear. This part looks very simple, but because of thegreat influence on the handling of the vehicle, so its technical content isquite high.
In order to avoid the risk of being shackled,the steering manufacturer designed many parts to be non-removable. Except forthe drill bit and the cutting machine, we could not open the steering box. Thatis to say, if the steering box is broken, we can only change the assembly.
The mechanical steering system has the lowest cost, but because ofthe lack of assistance, the driving experience is not good, and it has beenbasically eliminated.
Mechanical steering machine map
Hydraulic power is the steering system (HPS)with more steering booster pumps, drive belts, oil tanks, and matching pipingand control valves. It is necessary to provide power to the engine, that is,without starting the engine, there is no power. Its advantage is that thefeedback is better (that is, when you turn, you release your hand and thesteering wheel turns back itself), the disadvantage is that the assistance willnot change, there are low speed heavy, high speed light problem.
Hydraulic power steering system is currently themainstream of mid -end and low-end models and commercial vehicles.
The main structure of the electric powersteering system (EPS) is to add a power-assisted motor to the mechanicalsteering gear, and a belt-type or gear-type speed reduction mechanism. Theelectric power steering gear does not work when it is not turning, and it onlyprovides power when turning. In theory, the car is energized to help (in fact,most cars still have to be activated to give power), the advantage is that thesteering wheel is easy to turn, and can be adjusted to high speed, low speed,and basically no fuel consumption. The disadvantage is that some of thepower-assisted pointing feedback is not good.
Electro-hydraulic power steering (EHPS), whichcombines the advantages of electric power and hydraulic power steering, savesfuel consumption, smooth ride but cost much higher. More and more middle andhigh-end models are now in use.
电子液压助力转向示意图
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