As the domestic automobile consumption market is gradually transforming towards a more mature and rational direction, consumers' awareness of car maintenance and use has also increased. However, due to the existence of some misleading or false reports before, some car owners are facing some It is difficult to distinguish the authenticity of the car common sense. This issue of the car class has listed some common car common sense misunderstandings for your reference.

SUVs and SUVs

Is an SUV an off-road vehicle? the answer is negative. SUV is not only not an off-road vehicle, nor a sedan, but a passenger car. According to the national standard GB/T9471, the type of vehicle should be indicated in the model of the car: the first digit is the vehicle type code (2- means off-road vehicle, 6- means passenger car, 7- means sedan). Before each car goes on the market, it must go to the relevant department to get the model number, that is, the "vehicle manufacturer and product announcement", from which you can see the vehicle type of the SUV. For example, the hot-selling Dongfeng Honda CR-V, its model is DHW6453, DHW refers to Dongfeng Honda, the first 6 means this is a passenger car, 45 means this is a vehicle length of 4.5m, and the last manufacturer’s custom number. The Beijing Jeep BJ2023 is an off-road vehicle, the first number 2 refers to an off-road vehicle, and the second and third numbers 02 represent a maximum load of 2 tons in off-road state, which is a pure off-road vehicle. However, for ordinary consumers, most of the time driving in the city, so choosing an urban SUV with low fuel consumption and light driving is also a good choice.

Shock absorbers and shock absorbers

For the mechanism that filters vibration, is it a shock absorber or a shock absorber? Or shock absorbers? By analyzing its function, it can be seen that the shock absorber is the main component that generates the damping force. Its function is to rapidly attenuate the vibration of the car, improve the ride comfort of the car, and reduce the change of the body inclination angle caused by the inertia force of the car. Very simply, it acts as a damper to dampen vibration, so the correct name is "shock absorber". During normal use, if you find that the car is running slowly and brakes urgently, if the car vibrates violently, it means that there is a problem with the shock absorber. You should first check whether the shock absorber leaks oil or has traces of old oil leakage. In addition, the shock absorber will have a sound failure in actual use, which is mainly due to the collision with the leaf spring, the frame or the axle, the damage or fall of the rubber pad, the deformation of the shock absorber dust tube, and the lack of oil. caused, should be repaired as soon as possible.

pressure and pressure

According to the physical formula: pressure P = pressure F / force area S, the international unit of pressure is Pascal Pa, common pressure units are: kPa kilopascal, Mpa megapascal. In the automotive field, many people refer to the pressure in tires, intake superchargers and pipelines, and fuel injectors as pressure. For example, the air pressure in a tire is usually expressed in kg/cm, which is directly referred to as kg (unit of mass), which is obviously wrong, because pressure and pressure are completely different concepts in physics. In forced induction (supercharger or turbocharger) and commercial vehicle dynamic braking systems, the bar is usually used as a pressure unit. In the Torricelli experiment of middle school physics, a standard atmospheric pressure is equal to 76mm Hg, and 1bar≈0.1MPa≈1 atmosphere. The air pressure of the power braking system of a commercial vehicle is generally 8bar, the fuel injection pressure of a multi-point EFI gasoline engine (intake manifold injection type) is 3~4bar, and the low pressure tire pressure of a passenger car is generally 2.0~4.0bar. The low pressure tire of the car is about 6bar, and the high pressure tire is about 8bar. The tire pressure is not easy to be too high, otherwise it may cause a tire blowout and affect the driving safety.

Suspension and Suspension

Suspension is composed of three basic components, including guide mechanism, elastic element and damping element. In addition to these three basic components, there are generally limit blocks and stabilizer bars. The shock absorber belongs to the damping element; the guiding mechanism is the control arm, swing arm, guide rod, thrust rod, etc., and the suspension is divided into double wishbone suspension, McPherson suspension, multi-link suspension, etc. is based on The characteristics of the guiding mechanism are distinguished; the elastic element undoubtedly refers to the spring. At present, the widely used mainly coil springs, leaf springs, torsion bar springs, oil and gas springs and air springs, such as "air suspension" refers to the use of air The spring acts as a suspension for the elastic element, which is differentiated according to the elastic element. Suspension strut assembly with integrated shock absorber and coil spring. Some compact suspensions integrate elastic elements and damping elements, such as the McPherson strut of McPherson suspension, which is called "shock absorber" in Hong Kong and Taiwan, and is generally called "shock absorber" in mainland China. Shock absorber strut assembly. Just like "suspension" is the usual name for the mainland, and Hong Kong and Taiwan are often called "suspension" and "suspension". During normal use, if the vehicle body rolls too much when turning, it means that the stabilizer bar or guide mechanism components in the suspension system are damaged, and it is recommended to repair it as soon as possible.

Buick caring car butler warm reminder:

Always check tire pressure to ensure safety

Because the tire pressure is insufficient or the pressure is too high, it will affect the driving safety, tire life and fuel consumption. Therefore, the tire pressure should be checked regularly. If the tire pressure is found to be abnormal, it should be stopped and checked immediately. If necessary, replace the spare tire and drive to the repair shop for further inspection. In addition, finally remind the owner to regularly check the tire pressure of the spare tire regularly.

air damper