After a period of driving, the vehicle will be bumpy due to traffic accidents, road bumps, especially bumps on the road surface, wear of the chassis parts, replacement of chassis parts. And tires and other reasons can cause dangerous symptoms such as abnormal tire wear, vehicle deviation, safety decline, fuel consumption increase, parts wear faster, steering wheel sinking, vehicle drifting, etc., and these symptoms may be brought to you at any time. It is dangerous to drive.
Four-wheel alignment is to diagnose the vehicle for adverse symptoms and eliminate these symptoms by positioning angle measurement. It is necessary for a general family car to perform four-wheel alignment during annual maintenance, and vehicles that are frequently used under special conditions should be positioned every three months.
First, do you have to do four-wheel positioning when you are in a car?
Most drivers find that the car is off-track. The first reaction is to think that the tires and suspension system are out of order. Do four wheel alignment. In fact, there are many reasons for the deviation of the car. For example, the degree of wear of the tread pattern is different, the design of the suspension system is problematic, or the suspension is damaged, deformed, displaced, and the like.
1, tire pressure is not the main reason for the car deviation.
The position of the tire should be changed every 20,000 kilometers, because the wear of the drive wheel will always be larger than other wheels, and different friction will directly lead to deviation.
2. Under normal circumstances, the probability of deviation of the new car due to the suspension system is very low, because the vehicles before leaving the factory have been strictly tested and adjusted by the manufacturer.
However, it does not rule out that there is a problem with the original design. For example, the motion interference of the suspension guide rod and the steering tie rod will affect the deviation of the vehicle. The former is caused by errors in manufacturing and adjustment, the latter is caused by the original design, and the latter mostly causes a deviation to the right.
3, the quality of the steering system will also affect the car’s straight travel.
The looseness of the joints due to excessive wear clearance or wear of the bearings, kingpins and bushings will cause the car to swing its head during driving and will not maintain a normal trajectory. If it is the knuckle arm and the knuckle is bent and deformed, it will generally cause the vehicle to go in one-way deviation.
The most serious problem is that the horizontal tie rod ball head is loose after severe wear and will cause the steering to fail, and the car will completely lose control.
4, there are some alternative things that make you mistakenly think that the car is off the mark.
In high-speed cars, the horizontal wind will cause the car to run off; always relying on one side of the road will cause deviation; the low tire pressure on one side will cause deviation.
Second, what to pay attention to when doing four-wheel positioning:
Under what circumstances does the vehicle need to do four-wheel positioning?
1. Replace a new tire or a collision accident After repair.
2. The front and rear tires are unilaterally eccentric.
3, the steering wheel is too heavy or shivering while driving.
4, the car goes left or right when going straight.
5, daily maintenance of the vehicle: After driving for 3 months, the new car will be positioned once every six months or 10,000 kilometers.
After the normal four-wheel alignment, the vehicle will have the following improvements:
1. Increase the safety of driving.
2. Reduce the abnormal wear of the tires.
3, keep the steering wheel straight while keeping straight, and maintain straight-line driving.
4. After steering, the steering wheel will be automatically corrected.
5, increase the sense of control of driving.
6. Reduce the abnormal consumption of fuel consumption.
7. Reduce the wear and tear of the suspension components.
What are the consequences of inaccurate four-wheel alignment?
1. Excessive tire wear: Inaccurate four-wheel alignment parameters can cause the tire to be eccentric and cause a puncture.
2, the vehicle is not easy to drive: the steering wheel shivering and deviation will make you feel more tired driving, and increase the probability of traffic accidents.
3, fuel consumption increase: If there is no special situation and the fuel consumption increases, it may be that the vehicle’s four-wheel positioning parameters are not accurate.
Third, teach you five strokes to do four-wheel positioning to prevent being cheated:
1. When using the instrument for four-wheel positioning, pay attention to confirm whether the positioning instrument of the maintenance factory is advanced.
2. Confirm that the car data used by the maintenance personnel for your car is accurate.
The car is getting updated, the data is also being updated, and the upgrade of the positioning instrument is often unable to keep up with the times. Some new cars can only be selected according to some old cars. It is best to bring your car manual when positioning, because there is accurate data about your car.
3. After the car is positioned, check the printed data.
Whether the camber angle of the front wheel is within the standard range, don’t be too much, and there is no difference between the left and right, because it will cause your car to go wrong. At the rear rake angle, only some particularly high-end cars have a back rake angle of about 8 degrees because they have a good power steering system. The fore-aid value of the rear wheel of the current high-end car is also adjustable. If there is too much difference from the standard value, it will make your car run off.
4, the car is not a standard chassis car, like some SUV, pickup, small passenger car, etc., they are equipped with torsion bar springs, the opening time will cause the left and right car height is inconsistent, this time you need to adjust The torsion bar reaches the standard value.
5, do not pay attention to the car’s high-profile car and the factory standard value is inconsistent, while the low will go wrong; overall too low to run will lose the effect of shock absorption, too high will make your The car runs with a feeling of floating, the most important thing is to pay attention not to the front high and then low.
Fourth, correct the owner’s four-wheel positioning thinking misunderstanding:
1, think that doing four-wheel positioning is to adjust the front wheel toe.
Four-wheel alignment, as the name implies, requires the positioning of the four wheels of the car to be considered. The toe is a concept of angle, technically called the toe angle.
In fact, the front wheel not only has a toe angle, but also a camber angle, a caster angle, and a kingpin inclination.
The rear wheel also has a toe angle and a main positioning angle such as wheel camber and propulsion angle. When doing four-wheel positioning, the positioning angle of the rear wheel is more important.
2, choose a cheap store to do four-wheel positioning, the problem can not be solved.
At present, many domestic and foreign manufacturers of four-wheel aligners compete to occupy the market. The locators of various forms and quality are dazzling, and there is no intellectual property and no technical content locator manufacturer. Competing to drive down prices.
In fact, the reason behind the low price is actually because the technical content and measurement accuracy of the equipment are not high. The result is that the positioning problem of the vehicle cannot be fundamentally solved.
3, the owner does not understand the common sense of four-wheel positioning operation, easy to be fooled.
Most users don’t know much about the knowledge of four-wheel positioning. They don’t care about the operation when they do wheel positioning for their cars, and they rarely give their opinions. Some maintenance personnel will avoid the owner to do the four-wheel alignment. Other maintenance personnel will not check the positioning before positioning. Even the cracks of the semi-axle rubber sleeve and the hem arm joint rubber sleeve cannot be informed to the owner in time, resulting in future users. Greater losses, repeated positioning and repetitive charges.
Summary: Don’t underestimate the four-wheel alignment, which is related to the safety of our driving. Accurate four-wheel positioning data of a car can help us better use the car, reduce the cost of car maintenance and improve safe driving.