What happened when the steering wheel of your car suddenly sank?

The phenomenon of heavy steering wheel steering in automobiles].

When maneuvering the car to turn left and right, turning the steering wheel feels unusually heavy and laborious, and the driver's physical exertion increases.

Analysis of the causes of heavy steering of automobiles].

The main reasons for the heavy steering of the hydraulic power steering system are:

1) The causes caused by the steering gear are:

The upper and lower bearings of the steering gear worm are adjusted too tightly or the bearings are damaged, and the bearing working surface is not properly matched; The meshing gap between the worm and the roller transmission pair is too small; The matching gap between the steering rocker arm shaft and the bushing is too small, the assembly is too tight, or the axis of the two bushings is skewed; The steering shaft is bent or the shaft tube is concave and rubs against each other; The steering gear is oil-hungry or oil-free.

2) The reasons caused by the steering transmission mechanism are:

The ball joint pin assembly of the steering longitudinal and tie rod is too tight or lacks oil; lack of oil or damage to the steering knuckle thrust bearing; The steering knuckle kingpin and bushing are assembled too tightly or lack of oil; The knuckle arm is deformed, and the tie rod is bent.

3) The reasons caused by the driving system are:

deformation of the front axle or frame; inaccurate front wheel alignment; insufficient air pressure in the front wheels; The deflection and size of the front leaf springs do not meet the regulations.

4) The causes caused by power steering are:

The hydraulic system lacks oil and the afterburner is insufficient when steering; The power cylinder or distribution valve of the oil pump is worn, the sealing ring is damaged, the internal leakage is serious, and the pressure is insufficient; There is air in the hydraulic system; Poor operation of the drive oil pump device (too loose belt or poor gear transmission); Clogged filters, leaking or clogged oil supply line joints, poor oil supply; The safety valve is leaking oil or the spring is too soft and the pressure is insufficient.

Diagnosis and elimination of steering heaviness in automobile steering system].

Hang the transmission into first gear to start and move forward at low speed, and the rotating side 160 direction disc does left and right steering, in-situ U-turn, reversing and other tests to determine whether it is heavy on one side or heavy on both left and right.

After jacking up the front axle to lift the two front wheels off the ground, turn the steering wheel for testing, if it feels heavy, it means that the fault is in the steering gear and steering transmission mechanism, and has nothing to do with the driving system.

After removing the steering rocker arm, turn the steering wheel for testing, and it still feels heavy, indicating that the fault is in the steering gear;

If it is lightweight, it means that the fault is in the steering transmission mechanism.

Pull the front wheel left and right with your hand, if you feel too tight or can't pull it, you should check whether the ball pin fit is too tight, whether the thrust bearing is normal, whether the kingpin and bushing fit properly, whether the lubrication is good, and the necessary adjustments and lubrication should be made to replace the damaged parts.

If you lift the front axle and turn the steering wheel and feel that the steering is light, the driving system will fail.

At this time, the front wheel air pressure should be carefully checked whether the air pressure is too low, whether the frame and front axle are deformed, whether the front leaf spring is good, and if necessary, the front axle should be removed to check the caster angle of the kingpin, the camber angle of the front wheel, etc.

Precautions for heavy repairs of automobile steering system steering.

The inspection sequence of the steering gear: generally check whether the surface of each journal is intact (whether the geometry is correct); secondly, check the wear of the meshing surface of the transmission pair; Check again whether the riveting place between the worm shaft and the worm is loose, the perpendicularity between the carrier and the steering rocker shaft, etc. During the assembly process, the adjustment of the axial clearance of the upper and lower bearings of the worm and the adjustment of the meshing clearance between the roller and the worm should be checked.

I hope you do. Thank you.

The first type has the highest penetration rate, called the hydraulic power steering system, this kind of power assist system, basically the light and heavy feeling of your direction is relatively constant, if it suddenly becomes very heavy one day, it may be that the steering power oil is dirty, it is similar to the oil of our engine to be changed.

Hydraulics is followed by electro-hydraulic power, which is used to drive this electric motor. This thing has an advantage, that is, we drive at high speed, the faster the speed, the heavier the steering wheel, so as to avoid our hands a little carelessly, the whole car will fly out. When the speed is slower, it is lighter to fight.

So these two situations seem to have been checked, there is no problem, the steering wheel is still heavy, I have some friends to tell me about this problem, and then we gave him a full check of the car, and found that the tire gas is a little less, and the tire gas will also affect the weight.

So friends, the steering wheel is light and heavy, this thing is not necessarily the car is broken, you drive comfortably this is the first thing, the second thing is a comprehensive system inspection, in order to better solve this problem.

Before talking about the reasons for the steering wheel sinking, let's first take a look at the steering wheel to play the direction of the assistance, because the power is different and the system is different, the reasons for the steering wheel sinking will be 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 convert it into the strength of ten hands, so that the steering wheel will be very easy. For this kind of power assist system, when we drive the direction of the feeling is relatively constant, if suddenly one day becomes very heavy, or slowly heavy, it may be that the steering power oil is dirty, it is the same as the engine oil, it is to be replaced after a certain period of use. Of course, it is also possible that because there is less oil leakage, then there is less natural assistance, so the steering wheel becomes heavier and heavier.

This situation is actually very easy to solve, basically as long as we maintain the vehicle in time, or add and replace the steering oil, there is no problem. Some mechanical systems themselves may also have some general minor faults, such as the fit of the individual bearings between the steering is too tight, or the lubrication is poor, the steering tie rod ball joint is adjusted too tightly, or the lack of oil, the steering shaft and casing bending, will also cause stagnation, etc. So, if you are using a hydraulic power steering system, if your steering wheel is getting heavier and heavier, it is really necessary to overhaul it.

The second is electro-hydraulic assistance. The electro-hydraulic power steering system is an upgraded version of the purely mechanical system of hydraulic assistance. Originally, it used an oil pump to provide assistance to our car, making it easy for us to play the direction, but now this oil can be used instead of using an electric motor to drive.

One of the advantages of electro-hydraulic power assist is that at high speeds, the faster the speed, the heavier the steering wheel, which can effectively prevent us from flying out or sliding out of the whole car because of a slight carelessness of our hands. When the speed is relatively slow, for example, when we reverse, move the garage, turn around on the spot, etc., the steering wheel is relatively light.

The reason why the steering wheel of a car is heavy:

1. If it is hydraulic assistance, check whether the booster oil is lacking, whether there is oil leakage, the lack of oil needs to be replenished to the normal range, and if there is no shortage of oil, check whether the booster pump belt is too loose, and if it is too loose, the belt needs to be tightened, and whether the oil is too dirty to cause poor fluidity, which is generally replaced once every 2 years or 60,000 kilometers.

2. If it is electronically assisted, check whether the fuse is burned out, and whether the line is open or short circuited to the ground.

3. Check the tire pressure, air leakage will also cause the direction to become heavier, so you need to inflate.

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.

It is recommended to check the power steering system, including the power assist oil pump, the power pump belt, whether the oil pipe is blocked, the steering machine, and the ground suspension [If you have any questions about the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

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.

1. The steering wheel becomes heavier, which is likely to be a problem with the steering oil.

The hydraulic power steering system is to play the steering wheel, there is a shaft connected to the bottom through the steering wheel, and there is a set of hydraulic system. With the strength of one hand, the hydraulic pressure will become the strength of ten hands, and then the steering wheel will be easy. In this kind of booster system, the feeling of the severity of the direction is relatively constant.

If it suddenly becomes very heavy one day, or slowly becomes heavier, it may be that there is a problem with the steering power oil, it becomes dirty and deteriorated, or there is less oil leakage, and the power is less, and it will become very heavy and heavy.

2. The bearing fit is too tight.

The rolling bearings connected by each steering system and the East China bearings are too closely matched, which will lead to poor lubrication of the bearings and the formation of stagnation. There are two specific manifestations of directional heaviness, one is heavy in the one-way direction, and the other is heavy on both sides. Both of these situations should not be underestimated, and the mechanical part and the cause of the power assist system should be checked in a targeted manner, or whether there is any seal damage such as oil leakage and air intake.

We must pay attention to the warning information issued by the car, find and solve the problem as soon as possible, and avoid accidents.

3. There is a problem with the booster.

The relationship between the steering wheel and the booster is naturally inseparable, and when the steering wheel becomes heavy, it is likely that there is a poor circuit contact inside the booster system or some other problem.

The reasons for the failure are 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 checking turns.

What's going on with the steering wheel suddenly not moving and being heavy?

Answer: The reasons why the steering wheel suddenly can't move and sink are as follows: 1. Failure of the booster pump

When the pump pressure of the booster pump does not reach the standard value, the heavy phenomenon will occur when using the steering wheel, and the flow control valve needs to be detected.

What is it that happens when the steering wheel suddenly sinks while driving?

Answer: Before talking about the reasons for the steering wheel sinking, let's first take a look at the steering wheel to play the direction of the assistance, because the power assist is different, the system is different, the reasons for the steering wheel sinking will be 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 a hand, this hydraulic.

What's going on with the steering wheel suddenly being heavy?

Answer: The reasons why the steering wheel of the car is very heavy: 1. The power booster oil is insufficient.

Booster oil is the main driving force that drives our car, so when there is a shortage of booster oil, it is naturally difficult for our car to drive, let alone turn and change direction. 2. Help the uncleanness of the oil. If our car has a time when it is difficult to move the steering wheel when steering,..

The sinking of the steering wheel may be a problem with the steering system. Because the hydraulic power steering system has a booster pump and a hydraulic pipeline, the structure is more complex, so the chance of failure is relatively large, and the failure of the hydraulic system is not easy to eliminate.

You can check whether the air pressure of the tires is insufficient first, and then you can go to the car repair shop to overhaul it.

For the sake of safety, it is recommended to send it to an official repair shop for repair as soon as possible.

The steering wheel suddenly becomes a problem, which may be a problem with the steering oil, replace the steering oil, or the tire is seriously worn, or it may be related to the ground friction at that time, which must be considered comprehensively.

Heavy steering of the car may be caused by damage to the booster pump, damage to the steering machine, and wrong four-wheel alignment data. There are 4 main reasons for heavy steering in cars:

1. Lack of booster oil: The lack of booster oil will directly lead to heavier direction, because the booster pump needs sufficient oil to push the piston to bring assistance. When the vehicle is missing booster oil, you need to check whether there is oil leakage in the pipeline, if there is no oil leakage, you need to check whether the oil is dirty, whether the pipeline is blocked, etc., and then repair it according to the specific problem.

2. Slippage or breakage of the belt of the booster pump: the power of the booster pump needs to be transmitted by the belt, if the belt slips, it will cause the booster pump to fail to reach the speed standard when working, so that the booster becomes heavy; If the belt breaks, the booster pump will directly lose its working power source, and the vehicle will have a complete failure without assistance. When the above situation occurs, only the power pump belt needs to be replaced.

3. Motor damage: The motor is the last and most important link to provide steering assistance, and its damage will cause the vehicle to become heavier or directly without assistance. During maintenance, it is necessary to check not only whether the wiring is normal, but also whether the sensors, control units, fuses, relays, and other components are normal.

4. Low front tire pressure: low tire pressure will increase the contact area between the tire and the ground, which also means that the frictional resistance during driving or steering will increase. When handling, the first thing to do is to check whether the tires are leaking, and make up the air pressure if there is no air leak.