1. The so-called four-wheel alignment refers to using the average propulsion direction of the rear wheels as the positioning reference to measure and correct the relative alignment angles of the four wheels; so that the chassis parts and tires can maintain proper alignment when the vehicle is driving. The geometric relationship enables drivers to drive their cars correctly and comfortably, extending the service life of tires and chassis-related parts.
2. When is it necessary to do a four-wheel alignment
1. Before the annual vehicle inspection
2. When the new car has been driven for 3,000 kilometers
3. Every six months or when the vehicle has traveled 10,000 kilometers
4. After replacing or adjusting tires and suspension systems
5. When replacing steering systems and parts
< p>6. The steering wheel is not straight when going straight7. The steering wheel needs to be held tightly when going straight
8. The vehicle pulls to one side when going straight
9. The vehicle turns When driving, the steering wheel is too heavy or cannot return to the right position automatically
10. The body feels swaying or floating when driving
11. Abnormal tire wear
12 , After the accident car repair
3. How to choose
First of all, you must choose a good four-wheel aligner. With the evolution of suspension systems, the more connecting rods there are, the more complex the structure is, and the corresponding requirements for the four-wheel positioning angle are getting higher and higher. Choosing a service shop with an advanced wheel aligner is a prerequisite for good wheel alignment. The following is the advanced performance of some four-wheel aligners in recent years, which may be used as a reference when you choose:
1. Rodless measuring head (sensor): Rodless sensor is based on the aerospace industry The principle of electronic inclinometer, as the standard basis for measurement, its advanced design aims to reduce the inconvenience and error caused by the traditional long rod type measuring head that needs to be projected left and right. The rodless measuring head measures independently on four wheels, so there is no need to worry about left and right projection, making the measurement data more accurate.
2. Wireless transmission electronic wheelbase measuring ruler: Vehicle tire modification is popular nowadays. After the tires are modified, the wheelbase between the two wheels changes, but the original value on the locator does not change. . The electronic wheelbase measuring ruler can measure the wheelbase after the vehicle is modified, and wirelessly transmit the data to the computing system for data changes to provide the most accurate measurement value.
3. Simultaneous display of images from multiple angles: Measurement and adjustment results can be simultaneously displayed on upper and lower dual-color displays in the form of graphics, data, colors, etc., making it easier for technicians to adjust the vehicle.
4. Don’t be superstitious about the transmission method: the main function of the vehicle four-wheel aligner is to provide a set of accurate measurement data to the chassis repair technician as the basic data for adjusting the vehicle chassis. The key lies in the sensor. Are the values ??provided correct? The so-called advanced transmission system that some manufacturers or stores emphasize is just a method of transmitting data after measurement. Just imagine, if the measured data is not accurate, what is the use of the advanced data transmission method? Therefore, for the four-wheel aligner, the accuracy of the measurement data is the most important.
In addition, the four-wheel alignment instrument is not used to adjust or change the alignment angle. It is only used to measure the alignment angle for the technician's reference. The technician compares the angle measured by the instrument with the angle set by the original manufacturer. , if it exceeds the design allowable range, adjust or replace some parts to restore the original design angle. Therefore, when you choose a four-wheel alignment shop, you must remember that the quality of the alignment equipment is important, but the "people" who adjust the alignment angle are even more important. Technicians with both experience and skills combined with advanced equipment are the best choice.