Why doesn t the steering wheel automatically return to center when the car turns?

Car steering wheel.

The reasons why the turning will not return to the right are: 1. The tire pressure on the left and right sides.

unevenness; 2. The tires on both sides are worn unevenly; 3. Low speed; 4. The steering ball joint is not flexible or too tight. An automotive steering wheel consists of a steering wheel, a steering shaft, and a steering column.

The ability to return to the center is mainly determined by the camber angle of the front wheel kingpin (popularly understood as the angle between the axis of the front shock absorber and the plumb line), which is a design decision. Another piece is the return resistance of the steering system (such as the transmission resistance of the steering gear rack and pinion, the transmission resistance of the worm gear of the steering column or the occasional jamming, etc.).

First of all, the landlord you didn't make it clear in what circumstances do not return to the positive, if it is a low-speed situation, almost 30 below the normal is basically no abnormality! Then, the direction back to the right has little to do with the assistant motor, and the inclination angle of the kingpin, if your car does not collide or support the bottom of the basic exclusion! Secondly, I don't know why you did the positioning before, the positioning of the vehicle leaving the factory is the best, don't.

Automatic back to normal, what do you want, it's not autopilot. You hold the steering wheel in your hand and slowly pull back.

Friends who believe in the car have noticed that after we finish the direction when we are driving and turning, the handle is loosened, and at this time we will find that the steering wheel will return to the right, so what is going on?

Why does the steering wheel automatically return to the center after turning? Today, I'm going to talk to my friends about the reason behind this, because it involves some karmic terms, friends still have to be patient to read it, and I try to make it easy to understand.

Why does the steering wheel automatically return to the center after turning?

1. Because in the process of driving, the car will try to move in the direction of the least resistance, and driving in a straight line is the least resistance. As a result, the wheels automatically return to center to reduce drag when the car is moving.

2. In addition, it is also related to the two positioning parameters in the four-wheel alignment that we usually say, the inward tilt of the kingpin and the backward tilt of the kingpin. So I had to explain these two terms to my friends.

What is Kingpin, Kingpin Invert, Kingpin Back?

What is Kingpin?

The kingpin is the axis of rotation of the steering wheel when turning, the line connecting the wheel and the knuckle, and the wheel is rotated with this axis of rotation when turning.

Nowadays, many cars with independent suspension no longer have kingpins, but in wheel alignment, the term kingpin is still used.

What is Kingpin Inclination?

It means that the kingpin is installed on the front axle, and its upper end is slightly inclined inward, so that an angle is formed between the kingpin axis and the ground vertical line in the transverse plane of the car, which is called the kingpin inclination angle.

The function of the caster angle of the kingpin is to raise the front of the wheel or the front of the whole vehicle by a certain distance when the wheel rotates, so that under the action of wheel gravity, the wheel will return to its original direction and position, that is to say, under the action of wheel gravity, the steering wheel is easier to reset.

What is Kingpin Tilt?

Viewed from the side of the car, the kingpin axis does not form a right angle to the ground, but is slightly tilted backwards, so there is an angle between them, which is called the kingpin caster.

Its main function is to maintain its stability when the car is driving in a straight line, and can make the front wheels automatically return to the center after the car is turned.

The point where the kingpin axis intersects with the ground will produce a distance from the wheel, and the lateral force of the ground on the wheel will form a torque to the kingpin when turning, and this torque can make the front wheel positive.

If your wheels can't be corrected in time, how to solve it?

We have said so much, I believe that friends also see that in fact, the wheel is in a certain relationship with the two corners mentioned above, so at this time the question comes, if the wheel can not be corrected in time, what should I do?

1. Check the tires.

Check the tire pressure and check the degree of wear on both sides of the tire, as both parameters will affect the parameters of the front overhang of the car.

2. Do four-wheel alignment.

I mentioned above that another factor that affects the wheel alignment of the car is: the two parameters in the four-wheel alignment, the caster angle of the kingpin and the camber angle of the kingpin, so we can make a four-wheel alignment for the car.

When the car turns, the steering wheel automatically returns to the center, which has a lot to do with its design principle, which is also to make us more light-hearted while driving. Strength is also for safety.

After the car turns, the steering wheel automatically returns to the center, which has a lot to do with the design principle, and also in order to increase the lightness during driving. It's also about power.

The outer steering machine is damaged.

When the car turns, the steering wheel will automatically return to the center, which is specially designed to increase the handling and driving stability of the car, the decisive factor is the kingpin tilt and the kingpin tilt, the kingpin tilt has the greatest impact, the front wheels are independent suspension, so there is no physical kingpin, just a virtual line. The wheel rotates around an axis, which is called the kingpin.

Most of the cars are connected by the upper fulcrum of the shock absorber and the fulcrum of the lower swing arm, and this line is not perpendicular to the ground in the center of the wheel, but is inclined backwards and inwards. Leaning backward is called kingpin tilting, and tilting inward is called kingpin tilting.

I believe that many car owners will find that as long as we release the steering wheel of the car after turning, the steering wheel will automatically turn right at this time, and we do not need to operate it ourselves at all. What is the reason for this?

In fact, this is mainly to increase the maneuverability and stability of the car. The reason why you can feel the righting force of the steering wheel is actually affected by the camber angle of the kingpin and the camber angle of the kingpin. The kingpin is actually the axis of rotation of the steering wheel when steering, and is the connecting line between the wheel and the knuckle.

Although many cars now do not have a pivot pin, the term is still used all the time.

The kingpin tilted inward means that the kingpin is mounted on the front axle and the upper end is slightly tilted inward. At this time, in the transverse plane of the car, an angle is formed between the axis of the kingpin and the vertical line of the ground, which is called the kingpin tilting inward. On the other hand, the caster angle of the kingpin refers to the angle formed by the caster angle of the kingpin axis when viewed from the side of the car, so why can these two inclinations help the steering wheel to align?

Generally speaking, the caster angle of the kingpin has the greatest effect on the steering wheel. Due to this angle tilted backwards, the car tires will be subjected to the reverse friction force of the ground when turning, and a torque will be formed between the point of action of the friction force and the kingpin extension wire, and the direction of this torque force will be opposite to the direction of the wheel rotation, so the car steering wheel will automatically return.

If we find that the steering wheel of our car cannot gradually return automatically during the long-term use of the car, it means that there is a problem with the tires or these two angles of the car, which may be caused by abnormal tire pressure or wear on both sides of the tire, which is also the most common failure factor. At this time, we only need to fill the right amount of tire pressure or replace the tire to fix the fault. If changing the tires doesn't work, then we need to do the wheel alignment, and correcting these parameters can solve the problem completely.