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How much do you know about the four-wheel positioning of the car chassis?

How much do you know about the four-wheel positioning of the car chassis?

“Four wheel positioning is a simple and complex vocabulary. It is an industry and a concept. When we are engaged in this industry and operating this project, we should start from the roots. Everything has its roots, know its roots It’s easy to handle. The important reason why many people are not doing good repairs is that they have not mastered the principled principles. Our article in Jinwen is to share the common sense conclusion in the four-wheel positioning.”

First of all, it should be clear what is four-wheel positioning

As the name implies, the four wheels of the vehicle are set at proper angles. Most small cars are driven by four wheels directly in contact with the ground, and the angle formed between the four wheels of each car and the ground (the angle of the chassis can be explained by referring to the angle of the public account article) is different. The simple thing is that the contact between the wheels and the ground may be perpendicular to the ground or may be inclined to the ground and the position and inclination between each wheel can be moved and changed, but the four wheels of each car are at There are specific angular positions on the ground to ensure smoother driving of the vehicle, and generally new car manufacturers have a specific four-wheel chassis angle parameter range, but the vehicle may cause wheels due to the mobility of the chassis or collision during driving. The angular position between the ground and the wheels will change, then the four-wheel positioning is to detect the four wheels of the chassis by manual or equipment and adjust the chassis components to determine the return to the optimal angular position to ensure a more stable driving state. This is four-wheel positioning.

One of the main problems that many people can’t do with four-wheel alignment is that they can’t figure out what is four-wheel alignment, and most of the equipment factories or training institutions on the market don’t know how to install and confuse their children, which complicates the problem. Excessive publicity, spreading the four-wheel positioning and the four-wheel locator is awesome. This also causes many people who really do positioning to be afraid, daring or even unwilling to adjust, and relying on machines too much, and not really engaged in it. Clear the reason behind the four-wheel positioning.

In fact, the four-wheel locator is just a testing device. The traditional method is to manually measure the angular position of the wheel. The four-wheel locator is an advancement of the times. It replaces the previous manual measurement methods and makes the measured wheel angular position more accurate and more accurate. It has credibility, but it is only for the four-wheel positioning technician as a reference to judge and solve the four-wheel positioning problem as a reference device, and requires correct knowledge and correct understanding of the equipment and operations used. Better to judge and solve the chassis problem of the vehicle.

The absolute conclusion of four-wheel positioning

When we are doing four-wheel positioning, an absolute prerequisite is to be 100% sure that the vehicle’s hardware is no problem, that is, the tires, wheels, chassis components, steering components, etc. do not have mechanical hard failures or serious deformation, so go to operation four The adjustment of the wheel alignment chassis is meaningful. Now more than 85 percent of the people in the industry are directly on the machine to detect and adjust the pre-completion, which is a very wrong behavior. The correct operation must understand the basic situation of the vehicle and the basic hardware exclusion to make the most correct adjustment.

It is necessary to clarify the problems that the angle of the four-wheel positioning can solve and affect, and to correctly view the adjustment of the four-wheel positioning. The god-like mythical four-wheel positioning on the Internet says that it can solve a lot of problems, and many novices are dazzled, but can four-wheel positioning really solve so many problems? Is it that complicated? In fact, there is no such thing. The four-wheel positioning is very simple, and the problems solved are also straightforward. There are basically four: deflection, tire eating, incorrect direction, and poor steering force return. It is undeniable that such effects can be achieved to some extent, such as reducing fuel consumption, sliding farther, etc., but as long as the four-wheel positioning solves the four main problems on the appeal, then the problems that belong to this situation will not occur and be resolved. The above problem is not 100%, because in addition to the four-wheel positioning angle problem, if the chassis hardware of the vehicle is damaged or deformed, there will still be related problems, so it is necessary to solve the problem that the hardware of the vehicle must be resolved before passing the angle. To resolve related faults. Only because such faults caused by the four-wheel positioning angle can be resolved by four-wheel positioning, so four-wheel positioning is established under the condition that all components of the chassis are normal, then the main problem solved by four-wheel positioning is : Deviation, tire-eating, steering force return to wrong position, steering wheel not correct. Simplify the problem to get a better grasp! Rather than some organizations blindly amplify the problem of excessive myths!

When do you need to do four-wheel positioning

So when it is necessary to do four-wheel positioning, it is obvious that in the above four cases, you need to first eliminate the problem of chassis and body parts and then carry out four-wheel positioning, but in many cases there is no such problem. Positioning detection and adjustment to avoid precaution and prevention.

  1. It is the case where the vehicle has obvious deviation, incorrect direction, tire eating, poor steering and heavy steering.
  2. After the vehicle passes the pit abnormally (the bumpy section of the road surface is driven violently and hits).
  3. After the traffic accident of the vehicle (the traffic accident will cause the position of the chassis parts to change).
  4. After replacing new tires or replacing chassis components.
  5. After the running-in period of the new car and the replacement of new parts for a certain period of kilometers. Because the new car leaves the factory or replaces the new chassis, the components have not reached a good angular position. After driving for a period of time, the angle of each component of the chassis will change due to the running-in conditions. Four-wheel positioning testing is required to determine whether adjustment is required .

So don’t blindly do four-wheel positioning, and don’t blindly adjust the four-wheel angle, take the right medicine, and carefully analyze the problem of preventing the four-wheel angle of the vehicle.

6月-04-2020

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