What is the reason for the heaviness of the electronic power steering wheel

The weight of the electronic power steering wheel is mainly caused by the lack of lubrication in the steering machine, the tire pressure is too low, the battery is lost, the booster is faulty and the tire pressure is insufficient; In addition, electronically assisted fuses, circuits or short circuits to ground should also be eliminated, and the cause of their existence can be gradually investigated according to the fault response.

When the steering power oil pressure is low, the steering wheel will also be heavy, and if the steering wheel becomes heavy due to the steering oil pressure, you need to go to the repair shop for maintenance in time. When the steering system of the car is mixed with air, not only the steering is heavy, but also there will be noise in the steering process, which needs to be dealt with in time to avoid unnecessary losses later.

Power steering system maintenance precautions

Regularly check whether the steering hydraulic oil is missing, if it is missing, it should be added in real time, and at the same time, regularly wash the hydraulic oil cup and filter element to prevent the hydraulic oil from being too dirty or deteriorated, and initiate a replacement of hydraulic oil every 30,000km.

When recuperating, the tightness of the steering pump belt should be checked to see if there is a break, if there is a real-time replacement, the tightness should be pressed by the finger about 1cm, regularly check the pipe of the hydraulic system to discuss whether there are signs of oil leakage, the hydraulic hose should only avoid friction with other components, in order to prevent and destroy the air intake, at the same time, the hydraulic hose should be replaced regularly to prevent the hose from peeling and blocking the pipe.

The above content refers to Encyclopedia - Electric Power Steering System.

The reasons for the steering wheel sinking are: 1. Insufficient booster oil, 2. Tire pressure is too low, 3. Bearing fit is too tight, 4. Booster problem, which can be dealt with according to the actual situation.

1. Insufficient booster oil.

Generally, the feeling of the weight of the direction is relatively constant, if it suddenly becomes very heavy one day, or slowly becomes heavier, it may be that the steering power oil is dirty, it is similar to the engine oil, and it needs to be replaced. Or if there is less oil leakage, then there is less power, so the steering wheel becomes very heavy. In this case, it is necessary to maintain it in time, or to add and change the steering oil.

2. The tire pressure is too low.

If the tire pressure is too low, the area of contact between the tire and the road surface will increase, the friction will increase, and the steering difficulty will increase, resulting in a heavy steering wheel, which is not conducive to driving safety.

3. The bearing fit is too tight.

For a rolling bearing connected to each steering system, it is also closely matched with the sliding bearing, so it will lead to the lubrication of the bearing can not be well run, which will affect the phenomenon of stagnation, causing the steering wheel to become sinking, this situation should check the mechanical part and the power assist system, or rule out whether there is a leakage of the inlet seal damage phenomenon.

4. Booster problem.

The relationship between the steering wheel and the booster is inseparable, so when the steering wheel becomes very heavy, it is likely that there are some poor circuit contacts or other problems inside the booster system, which should be repaired by the 4th shop.

The advantages of electronic power assist direction vary with the speed of the vehicle.

Advantages: Computer control, simple structure, no increase in engine load.

The disadvantage is that the motor is easy to break.

If the motor is broken, the circuit and sensor need to be checked, and basically it is replaced.

The electronic power steering wheel is very heavy and analyzed as follows:

Electronic power assist system, the emerging power assist system in recent years, eliminates the hydraulic system, direct motor drive, road interference is almost none, and the operation is very light at low speed, and the direction becomes heavier at high speed, theoretically the steering in the three power assist systems belongs to the lightest, and the operation is also the most sensitive, but sometimes it will be different due to the manufacturer's adjustment.

That is to say, the speed of the car will become heavy, this is for safety reasons, if the speed is high, the steering wheel is still so light, hit the direction, a little bigger, it is prone to accidents.

Electronic power assist is like this, the speed of the car will become heavy, this is for safety reasons, if the speed is high, the steering wheel is still so light, hit the direction, a little bigger, it is prone to accidents.

Before talking about the reasons for the steering wheel sinking, first look at the steering wheel to play the direction of the assistance, because the power assist is different, the system is different, and the reasons for the steering wheel sinking are also different.

The first is the most popular - hydraulic power steering. It is a hydraulic system in which the shaft is connected to the bottom through the steering wheel. To put it simply, with the strength of one hand, this hydraulic pressure will become the strength of ten hands, and the steering wheel will be easy.

If it suddenly becomes very heavy one day, or slowly becomes heavier, it may be that the steering power oil is dirty, and it is similar to the engine oil to be changed. Or if there is less oil leakage, then there is less power, so the steering wheel becomes very heavy and heavy. In this case, we basically maintain it in time, or add and replace the steering oil.

Then it is also possible that the mechanical system itself will have some general-purpose such minor failures.

For example, the fit of each bearing between the steering is too tight, or the lubrication is poor, the ball joint of the steering tie rod is adjusted too tightly, or the oil is less, and the steering shaft and what casing are bent, resulting in stagnation, etc.

Therefore, if you have a heavy steering wheel, it is really necessary to overhaul it.

The second type - electro-hydraulic assistance. The electro-hydraulic power steering system is an upgraded version of the purely mechanical system of hydraulic assistance.

Originally, it was used to provide us with this boost, so that we could hit the direction of light. Now the oil is gone, and the electric motor is used to drive the thing.

One of the advantages of electro-hydraulic power assist is that at high speeds, the faster the speed, the heavier the steering wheel, so as to avoid us from accidentally putting our hands on it, and the whole car will fly out or slide out.

When the speed is relatively slow, for example, when we reverse, move the library, and turn around on the spot, its steering wheel is relatively light.

Extended Materials:

Electric Power Steering (EPS) is a power steering system that directly relies on the electric motor to provide auxiliary torque, and the EPS system has many advantages over the traditional hydraulic power steering system HPS (Hydraulic Power Steering). EPS is mainly composed of torque sensor, vehicle speed sensor, electric motor, deceleration mechanism and electronic control unit (ECU).

Although the steering wheel is used to control the steering, different power assist systems are still different, so it is best to familiarize yourself with the power assist characteristics of your car before conducting a failure analysis. In total, there are now three forms of booster systems on the market.

Mechanical-hydraulic power assist system.

Engine belt driven, hydraulic assistance, this form of power assistance will give people a clear feedback of road feeling, there is a strong positive torque, the direction of low-speed hitting is heavy, and the direction of high-speed hitting is very stable. Hydraulic power assist has appeared for a long time, and now the technology is very mature.

If the direction of the hit is obviously heavy, the cause of the fault is probably as follows:

1. The steering power oil is too dirty. The booster oil is the force transmission medium, if the oil is too dirty, it will cause poor circulation and difficulty in the general direction. The more serious steering power pump will also "buzz".

2. Lack of booster oil or oil leakage. If the booster oil is gone, it is equivalent to no help, check whether there are traces of oil leakage in the relevant system. Focus on inspecting the steering power oil pot, power oil pipe, and steering machine.

3. The engine booster belt is too loose or too tight, or the belt is aging, the tightness can be adjusted, and the belt can only be replaced when it is aging.

4. The bearing of the steering system is too tightly matched or the lubrication is poor; The ball joint of the steering tie rod is adjusted too tightly or there is a lack of oil; Friction caused by bending of the steering shaft and casing is a mechanical fault of the steering system. Some cars can adjust the mating clearance, but most of them can't; The steering tie rod ball joint is generally recommended to be replaced; The steering shaft and casing are bent unless there is a major accident or man-made, and it is rarely possible to damage.

5. The front axle or frame is bent and deformed, and some can be adjusted through sheet metal, and most of the time it is recommended to replace it.

6. The front wheel toe is too tight, and four wheel alignment needs to be done.

7. Insufficient tire pressure, in fact, this should be the first to be checked, and it is also the easiest to judge, but it needs to be used with the help of a barometer, but this change is not obvious and cannot be observed with the help of the naked eye.

Electro-hydraulic power assist system.

Instead of being belt-driven, the electro-hydraulic booster has a dedicated electric booster pump. This setting does not have clear road feedback, bumpy roads do not affect the driving experience, and the steering wheel becomes heavy as the speed increases, also to improve high-speed stability.

The electro-hydraulic power steering wheel is too heavy, in addition to referring to the above 7 points, it is also necessary to pay attention to whether the electric power assist pump is faulty.

Electronic power assist system.

In recent years, the emerging booster system, eliminating the hydraulic system, direct motor drive, road interference is almost none, and the operation is very light at low speed, and the direction becomes heavier at high speed, theoretically the steering belongs to the lightest in the three power assist systems, and the operation is also the most sensitive, but sometimes it will vary depending on the manufacturer's adjustment.

Why can't you buy a domestic car? This 1 defect is very fatal, and it was thrown dozens of streets by the joint venture imported car!

The steering wheel suddenly becomes heavy, if you suddenly find that there is obvious resistance in the direction of rotation while driving, and the steering wheel cannot automatically return after turning, it may be that there is an air leak on one side of the front wheel, if it is hydraulic assistance, it may be that there is a problem with the booster oil, if it is electric assistance, it may be that the fuse is burned out or there is a short circuit in other lines.

Check to see if the power steering pump is good, less than 10,000 kilometers within the warranty period, go to the 4S shop for maintenance.

The reasons why electric power steering gets heavier could be:

1. Caused by tire pressure too low;

2. The speed of the vehicle is low, and the direction naturally becomes heavier;

3. On-board battery feeding. Suppose you find that the steering wheel is slightly better.

If it's a little heavier before, you might as well test the tire pressure first, sometimes the tire pressure is too low, which will also cause the steering wheel to become heavier, and it will be quite delicious to fight.

Force. Secondly, the steering wheel becomes important depending on whether there is a relationship with the speed of the vehicle. The power of the electric power steering system is inversely proportional to the speed of the vehicle, and the speed of the vehicle is fast.

Heavy, slow and light, and it only works when steering, which reduces fuel consumption. If it is determined that it is related to the speed of the vehicle.

Department, that should be normal.

The things you need to pay attention to when buying a car are as follows:

1. Confirm the purchasing ability

Determine the purchasing power, after buying a car does not affect the overall quality of life of the family, generally according to the average income of the family in the past three years, generally take out 20% of the family for three years, but not more than 10% of the value of the family's fixed assets.

2. Concerns:

The most important thing for a family car is safety, followed by affordability, because the safety of the car carries the life of a family, so safety is the top priority.

3. On-site confirmation:

According to the above two steps, basically determine the several models to buy, and go to the 4S store to confirm on the spot, including test drive, inquiry, loan, repair and maintenance, and other related information.

The advantages of electronic power assist direction vary with the speed of the vehicle.

Advantages: Computer control, simple structure, no increase in engine load.

The disadvantage is that the motor is easy to break.

If the motor is broken, the circuit and sensor need to be checked, and basically it is replaced.

One is hydraulic assistance, and the other is electronic hydraulic assistance: when there is a lack of auxiliary oil, the steering wheel will sink, and the power booster pump will "hum" at the same time as steering; Electronic power assist: At present, the most power assist mode, hydraulic pressure is gradually replaced by electronic control, because it is provided by electricity, and the steering wheel is very light.

Hello in this case, it is recommended that you do a steering wheel reset study!

If you don't understand something, feel free to ask, and I will give you a satisfactory answer!

Start with the basic setting of the direction, do the four-wheel alignment, and then adjust the steering power characteristic curve.

Kill to the left, stop for three seconds, kill to the right, stop for three seconds, return to the right, turn off, and you're done.

Take a look at fuses and EPS relays.

Redo the basic direction setting, then do the four-wheel alignment, or adjust the steering power characteristic curve.

It is advisable to check the fuse.

Check the EPS relay.

Do a steering wheel reset study.

It is still recommended to go to a professional place for maintenance and find the fundamental willingness.

Hello, is the sinking particularly serious? Or something else?

The steering wheel suddenly becomes heavy, if you suddenly find that there is obvious resistance in the direction of rotation while driving, and the steering wheel cannot automatically return after turning, it may be that there is an air leak on one side of the front wheel, if it is hydraulic assistance, it may be that there is a problem with the booster oil, if it is electric assistance, it may be that the fuse is burned out or there is a short circuit in other lines.

Electronically assisted weight loss can be recovered by the following methods.

1. Insufficient tire pressure will also make the driver feel that the steering wheel has become significantly heavier and heavier, as long as the standard tire pressure is supplemented, it can return to normal;

2. In addition, there is a situation that repeatedly rotates the steering wheel in place or at low speed to the power assist system with great load, which is easy to protect the steering machine at high temperature, resulting in heavy steering, and can be recovered after heat dissipation, which is a normal phenomenon;

3. Electronic power steering is actually a hydraulic mechanism, but the power is different from the mechanical type, and the electronic power assist uses electronic drive.

Pump. If the steering wheel becomes heavier, there is no good way for the real car owner to adjust it;

4. If you are a Volkswagen car owner, if you want to try to adjust it yourself, then you must have a VCDS vehicle self-diagnosis system. VCDS car.

The car self-diagnosis system is a car diagnostic software installed under the Windows operating system, and it also needs a diagnostic cable, which can be adjusted after connecting the car and the computer.