After the new maintenance of the car, the car is unfavorable.

    Mr. Wang, who lives in the northern suburbs, has been particularly depressed recently because his car has had some problems: the original light steering wheel of the Japanese car suddenly became very heavy, the speed was obviously changed, and the sliding distance after the throttle was released became shorter. This is accompanied by a significant increase in vehicle fuel consumption.

    All of this happened just after a routine maintenance last month. During the maintenance, Mr. Wang made a project that he had never done before—four-wheel alignment. However, when Mr. Wang drove the car back to the 4S shop, the reply in the store was “not related to the four-wheel alignment”. Then he helped Mr. Wang check the tire pressure, steering, brakes, oil and other items. Unfortunately, the fault was not solved. The car is still "meat".

    So, is this really not a problem with four-wheel alignment?

    Reporter verification

    Redo the four-wheeled positioning vehicle finally returned to normal

    After Mr. Wang reflected the problem to this newspaper, the reporter also interviewed the after-sales person in charge of a number of 4S stores. They all said that “the four-wheel alignment is not done well and generally will not make the steering wheel become heavier unless the numerical deviation is particularly large”. Instead, a colleague reminded: "If the toe angle is not adjusted, this problem will occur. It is recommended to redo the four-wheel alignment."

So accompanied by the reporter, Mr. Wang came to a tire franchise store. The reason why I go to the tire shop, first of all, the price is much cheaper than the 4S shop. According to the reporter's investigation, the price of the 4S shop for four-wheel positioning is different according to the brand and the model, generally 200-1000 yuan, and the tire shop charges are basically 80 yuan -100 yuan; secondly, the industry has a specialization. Since the four-wheel alignment needs to be done immediately after the tire is replaced, the large tire shop is generally equipped with a very professional four-wheel aligner, and the maintenance technician is also relatively skilled. The master of the tire shop told reporters: "When the business is good, we can do dozens of four-wheel positioning this day."

    The car is lifted on the lift, the sensor is placed, the vehicle model is selected, and various values are clearly visible on the computer screen. Sure enough, the right front beam of the rear wheel of the car is clearly outside the reasonable range. After some adjustments, Mr. Wang went out with the maintenance technician to conduct a road test. "Completely returned to normal, the car is more and more." After solving the problem, Mr. Wang is not happy.

    Seriously

    "It is generally to check the problem before doing four-wheel alignment."

    The "four-wheel alignment" listening to the name is quite tall. As the name implies, the position of the four wheel wheels is at its best. So some owners think that this thing needs to be done regularly, and even the keyboard car god suggests "doing four times a year." Wheel positioning".

    In fact, in a strict sense, four-wheel positioning can not be regarded as a maintenance project, it is more like a maintenance project. Shi Fengfu of Xinfengtai Audi's after-sales service department told the reporter: "How long does it take to make a four-wheel alignment? There is no clear regulation. Generally, we check the problem, or the customer feels that the deviation is not good when driving. "It is said that the "four-wheel" positioning, the main movement is the suspension, through the adjustment of various arms and levers to affect the angle and position of the hub. Shi Shifu introduced that the parameters frequently adjusted include front wheel toe, camber angle, front wheel toe, and camber angle.

    We all know that cars have very precise mechanical structures. Once a problem occurs in some parameters, the normal driving of the car will inevitably be affected. If the four-wheel alignment is not done well, the car is prone to deviations such as deviations and tires. It can also make the steering inaccurate and the suspension system parts wear.

special reminder

In these cases, it is best to do four wheel alignment

From the above description, we know that four-wheel positioning does not need to be done regularly as maintenance, but when the car really has a problem.

 So, what are the circumstances? The reporter interviewed a number of industry professionals, and concluded four articles:

1 After replacing the new tire. For new tires that have just been replaced, the four-wheel alignment parameters are not sure whether they are within the specified range, and the adjustment must be re-detected. By the same token, the tires should be adjusted to four wheels after maintenance.

2 After the collision of the vehicle, the chassis and suspension are damaged. We know that the four-wheel positioning movement itself is the thing on the suspension, the suspension is damaged, and the parameters of the four-wheel positioning are likely to change.

3 Vehicle driving performance is affected. For example, in a straight-line driving situation, the vehicle always runs off, the steering wheel cannot automatically return, and the steering wheel is trembling, floating or overweight.

4 tires are eccentric or other abnormal wear. For example, a partial wear on one side may result in a deviation of the camber angle; and an abnormal front beam value may also cause abnormal wear of the tire.

Automotive four wheel aligner preferred Hanchao Automotive Technology