What is the difference between automotive direction electronic power assist and hydraulic power assi

Electronic power assist, in fact, is the power provided by electricity, theoretically the car is powered on to help (in fact, most cars still have to start to give power), the advantage is that the steering wheel is easy to make light, and can be adjusted to high speed heavy, low speed light, and basically does not consume fuel (electricity is also burned, but the energy consumption of electric power is much smaller). The disadvantage is that there are many kinds of electric power assists, some of the electric power assist points to the feedback is not good, and some electric power assisted cars, the feedback of turning is very poor, and it is basically up to the driver to turn back. Another point of electric power assist is that there is no power assist oil.

If the body is heavier and the steering system needs to provide a large amount of power booster energy, then the electronic power steering is not enough, so the electronic power steering is mostly used in small displacement vehicles. Like the domestic Hafei Lubao, Changhe Beidouxing and other mini cars are using electronic power steering. That is to say, when the speed is low, the power is high, and the steering wheel is light; When the speed is high, the power of the power is small, and the steering wheel is heavy, which brings benefits to safe driving.

And all this is very simple to achieve, and it can be done directly through a single integrated circuit board.

The power provided by hydraulic power is provided by the engine, that is, if the engine is not started, there is no power assist. Its advantages are that the feedback force is better (that is, when turning, after turning, you let go, the steering wheel will turn back by itself), the disadvantage is that the power will not change, there is a problem of low speed and high speed, and at the same time it consumes the power of the engine, although it is not much, but it is actually to consume fuel (theoretically, it can be ignored in practice). At the same time, there is a point, the mechanical hydraulic power steering wheel can not be killed for a long time, to burn the power pump, hit a little back to the end, especially when turning around or reversing the garage, do not beat the steering wheel for a long time.

The power boost energy is particularly large, so it can easily drive the steering system of large cars. Hydraulic power steering has been developed for almost a century, so the technology is quite mature, can have good road information feedback, precise control, and power assist energy can be adjusted by adjusting the hydraulic valve, so the popularity rate is the highest.

In fact, if you want to look at it specifically, you still have to look at the specific problem according to the model. To talk about their respective advantages, hydraulic assistance is the feel of "more natural", "better road feeling", and more mature, any manufacturer can be adjusted more easily and perfectly. Electric power assist is more energy-saving, it is easier to adjust the effect of "low speed, light high speed and heavy speed", and can also realize some advanced functions such as automatic parking, deviation assist correction and other functions.

In terms of development trends, the prospect of electric power in the future is even more.

Mechanical-hydraulic steering:

Advantages: The mechanical-hydraulic power steering wheel and the steering wheel are all connected by mechanical parts, with precise control, direct road sense and rich information feedback; The hydraulic pump is driven by the engine, and the steering power is abundant, which is suitable for both large and small vehicles, especially large vehicles must have mechanical hydraulic steering; The technology is mature, the reliability is high, and the average manufacturing cost is low.

Disadvantages: Because it relies on engine power to drive the oil pump, the energy consumption is relatively high, so the driving power of the vehicle is virtually consumed; The pipeline structure of the hydraulic system is very complex, and the number of valves to control the oil is numerous, and the maintenance in the later stage requires costs; The whole set of oil circuits often maintain a high pressure state, and the service life will also be affected, which are the shortcomings of the mechanical hydraulic power steering system, and the mechanical hydraulic steering system has a large quality, especially the hydraulic pipeline and hydraulic pump, which further causes the loss of vehicle power economy.

Electro-hydraulic steering.

Advantages: The advantages are similar to mechanical hydraulic steering, and because the engine is not used to drive the hydraulic pump, the introduction of electronic control hydraulic system reduces energy consumption, the response is more sensitive, and the steering power can also be adjusted according to the corner, vehicle speed and other parameters, which is more humane. This makes up for some of the shortcomings of mechanical hydraulics.

Disadvantages: too many advantages must be built on a lot of shortcomings, the introduction of too many electronic units, its manufacturing, maintenance costs will increase accordingly, and the stability of the use of electronic systems is not as reliable as mechanical hydraulics, the whole system is very complex, and increase the quality of equipment of the whole vehicle, this kind of transformation system loves to be used in relatively large high-end cars.

Helping to develop to the electronic level is already a compromise for comfort and practicality at the expense of handling; The essence of electronic power assist is to get rid of the shackles of the original mechanical level, and the processor, motor and a set of planetary gears are introduced, so its low cost advantages: calculate different vehicle speeds, steering angles, vehicle inclination angles, etc. through ECU, and then give different steering forces through motor servo, which is cheaper than electro-hydraulic power assist, more intelligent, compact structure, and low maintenance cost.

<> basic structure is consistent with mechanical hydraulic assistance, but the hydraulic pump is driven by the motor and is not affected by the engine speed, so the power assist can be adjusted by adjusting the motor speed. The steering oil pump is usually a whole with the hydraulic distribution method, and the oil is pushed to the side of the booster by the hydraulic distribution valve, causing a pressure difference to cause the gear to roll. The driver feels the powertrain when turning.

Electronic power assist: The electronic power assist is composed of electric motor, steering wheel position sensor, electric steering machine control unit, torque sensor, steering machine and other main components. The characteristics of electronic power assist are that the slower the speed, the lighter the steering wheel, the lighter the direction will be on the spot, and the point is that the power assist intensity of this steering machine can not be adjusted basically, or it is very difficult to adjust; Adjustment method: Disassemble the pressure adjustment device of the booster, replace the spring and change the output pressure value.

And it's easy to have an imbalance in the strength of the force when steering left and right.

Compared with the original hydraulic power steering, the electric power assist greatly reduces the number of parts and volume, and the structure is simpler. Moreover, the booster system only works when it is needed, reducing the failure rate while improving fuel economy. The disadvantage is that the direction is very light, and the electronic directional power assist system will not be like the hydraulic steering power assist system, which requires a hydraulic auxiliary pump and a lot of pipelines, and the electronic directional power assist system is mainly our steering machine main body and steering motor, and our direction column and torque sensor.

The effect of electronic power assist is better, the electronic power is labor-saving, saving engine power, more sensitive, the energy consumption of hydraulic power is high, and the pressure of the hydraulic pump is too large and easy to cause damage.

It must be that the effect of electronic power assist is better, because hydraulic power assist requires a hydraulic pump, which may be easily damaged.

Of course, it is better to be assisted by electronic assistance, because it is more responsive, but the failure rate is relatively high.

The electronic power assist is better, the effect is better, and the information given is particularly accurate and rarely accidents, and it is also one of the mainstream uses in the market.

1. Turn it on, electric power assist, heavy in the high-speed direction and light in the low-speed direction. Mechanical and hydraulic assistance, the power is affected by the speed, the high-speed direction is light, and the low-speed direction is heavy.

The power provided by electricity, theoretically is the power of the car when it is energized (in fact, most cars still have to start to give power), and the advantage is that the orange is square.

It is easy to make light, and it can be adjusted to be heavy at high speed, light at low speed, and basically does not consume fuel (electricity is also burned out, but the energy consumption of electric power assist is much smaller).

2. Look at the manual 3. Look at the cabin, the electric power assist has a booster motor, and the mechanical hydraulic booster has a hydraulic booster pump.

The power provided is provided by the engine, that is, if the engine is not started, there is no power assist. The advantage is that the feedback force is better (that is, when turning, after turning, let go, and the steering wheel will turn back by itself).

Advantages of mechanical hydraulic power steering:

The technology is mature and stable, high reliability (even if the vehicle hydraulic system fails and loses the power assist, it can also rely on the traditional rack and pinion mechanism for steering), the steering power is large, the size of the model can be used, the manufacturing cost is relatively low, the road sense is clear, and the feel is silky, especially for some large cars and large SUVs with large steering loads, electronic power assist can not meet the needs of steering force, so hydraulic power assistance must be used.

Mechanical hydraulic power steering disadvantages:

Because it relies on engine power to drive the oil pump, the energy consumption is relatively high; The pipeline structure of the hydraulic system is very complex, and the number of valves to control the oil is numerous, which occupies a large space, and the later maintenance requires costs.

Advantages of electric power steering:

The system structure is streamlined, the quality is small, and the space is less; Only consumes electricity, low energy consumption; The electronic system is responsive and the action is direct and fast.

Electric power steering system disadvantages:

Because the electric motor directly drives the steering mechanism, it can only provide limited assistance and is difficult to use on large vehicles; At the same time, there are many electronic components, and the stability and reliability of the system are not as good as those of mechanical components, especially when the direction of continuous rotation is required in some sites, it may cause the booster motor to overheat and stop working; The lack of road sense information greatly reduces the pleasure of handling in actual driving; The manufacturing cost is high, etc.

There are no good or bad, only advantages and disadvantages. The biggest feature of hydraulic power assist is clear road feeling, smooth steering feel, and high power boost. These are all difficult to do with electronic assistance, but what is distressing is that there are many disadvantages of hydraulic assistance.

Whether the steering wheel turns or not, the booster pump is working, which will affect fuel consumption in the long run.

Compared with hydraulic power assist, the electronic steering system directly controls the power assist motor by electric energy, so it can solve many disadvantages of hydraulic power steering. Since the motor can not consume energy when it is not turning.

Hydraulic power steering.

In the system of hydraulic steering when the car is steering, from the type of power assist medium, a large part of the current car is using the hydraulic power system, this way is to convert the hydraulic driving force through the steering machine.

The booster pump is connected to the engine through a belt, so the power of hydraulic power steering is the engine **, which is the only difference between it and electronic steering, and the easiest way to distinguish the difference between the two types of steering is to look at the reservoir in the engine compartment.

At present, electric assistance is the trend. The hydraulic booster structure is complex and the maintenance cost is high, I believe you have heard of many problems of oil leakage in the booster pump. The electric booster structure is simple and the engine is powered, so there is no longer a need for a booster pump.

Each has its own advantages and disadvantages, and the electronic power is lighter. However, if the time is too long, the steering machine is prone to wear and damage. The hydraulically assisted ones are slightly heavier than the electronically assisted ones.

But the performance is more stable. Low failure rate. [If you have a problem with the car, ask the car master.]

4S shop professional technician, 10 minutes to solve. 】

The main components of the mechanical hydraulic power assist system are hydraulic pumps, oil pipes, pressure and fluid control valves, V-type transmission belts, oil storage tanks and so on. This type of power assist converts a part of the engine power output into hydraulic pump pressure, which exerts auxiliary force on the steering system to steer the tires. The mechanical-hydraulic power steering wheel and the steering wheel are all connected by mechanical parts, with precise control, direct road sense and rich information feedback; The hydraulic pump is driven by the engine, and the steering power is abundant, which is suitable for both large and small vehicles; The technology is mature, the reliability is high, and the average manufacturing cost is low.

Because it relies on engine power to drive the oil pump, the energy consumption is relatively high, so the driving power of the vehicle is virtually consumed; The pipeline structure of the hydraulic system is very complex, and the number of valves to control the oil is numerous, and the maintenance in the later stage requires costs; The entire oil circuit is often maintained at high pressure, and the service life is also affected, which are the disadvantages of mechanical hydraulic power steering systems.

The principle of electro-hydraulic power assist system is basically the same as that of mechanical hydraulic power assist, except that the oil pump is driven by an electric motor, and the power assist force is variable. The vehicle speed sensor monitors the vehicle speed, and the electronic control unit obtains the data and changes the oil pressure by controlling the opening degree of the steering control valve, so as to realize the adjustment of the steering power assist force. Electro-hydraulic power assist has most of the advantages of mechanical hydraulic power assist, but also reduces energy consumption, the response is more sensitive, and the size of the steering power can also be adjusted according to the corner, vehicle speed and other parameters, which is more humane.

However, the introduction of a lot of electronic units, its manufacturing, maintenance costs will also increase accordingly, the use of stability is not as reliable as mechanical hydraulic, with the continuous maturity of technology, these shortcomings are gradually being overcome, electronic hydraulic power has become the choice of many family models.

What is the difference between hydraulic power assist and electronic power assist of steering wheel? After reading it, I understand it in seconds, and I regret it.

The hydraulically assisted steering system has a slightly higher safety factor. The cost of maintenance is a little lower. The power steering system for electric power is also much more expensive to repair.

The electric direction is much lighter. But it's also relatively easy to break. If it's broken, the direction won't move at all.

The hydraulic one is broken. It's just not helping. But there is a direction.

It can be played. Such as the Rishi crown. Corolla.

There are also Ruiyi's. We've come across it. It's broken, it doesn't work at all.