Four major reasons for automotive jitter

One of the causes of vehicle shake: too many throttle valves with excessive carbon deposits will shake. Ding Fujian, after-sales service manager of Dongfeng Nissan Longkang 4S Store, said: “The most common cause of car shake is the dirty throttle or the fuel injection nozzle. Too much charcoal."

After the car travels for a period of time, if the throttle valve is closed because of over-dirtyness, or the idling stepper motor is stuck, the idle speed of the engine can be too high, and the carbon deposition of the engine during the work process can also cause the vehicle to shake. In particular, when starting the vehicle, the engine may shake more violently than normal, and sometimes it may not start once.

Therefore, when the vehicle shakes, first check the throttle and injector. If you find that the throttle is too dirty or the fuel nozzle has too much carbon, wash it in time.

Second, the cause of car jitter: engine mat aging can cause jitter Jitter is sometimes related to aging engine feet, Mr. Niu's car belongs to this situation.

Zhang Wei, manager of a car repair company in the eastern suburbs, said that the engine pin is actually the engine's shock absorber system. The engine pin is responsible for absorbing the subtle vibration of the engine during operation. If the engine pin has problems, these vibrations will be transmitted to the steering wheel and the cab. , causing jitter when idle.

When an automobile engine is in an idle state, it is most likely to cause vehicle shake when the automobile electrical system is turned on. Zhang Wei explained that the engine will increase the load due to the opening of the electrical system, causing the idle speed to fall. In order to compensate for the jitter caused by the idle speed, the engine will automatically increase the rotational speed. Therefore, when the car electrical system is turned on, especially when the car air conditioner is started in the summer, the engine is often shaken.

If the idling vibration does not drop due to the operation of the onboard air conditioning compressor, this kind of vibration may be caused by the aging of the engine feet, and the new engine feet need to be replaced in time.

Causes of automotive vibration III: Non-uniform tire weight is one of the causes of jitter. Unlike Mr. Niu’s car, which is caused by aging of the engine mat, the vehicle shakes. After the owner’s car shakes, it is detected by the auto 4S shop. Tire weight caused by uneven.

Dongsuo Honda Auburn 4S shop maintenance supervisor Zhang Suocheng said that when replacing a new tire or a new steel wheel in a general car, it is necessary to balance the tire once, otherwise the steering wheel is prone to jitter when the counterweight is not even.

If it is found that the weight of the tire is not even, it is necessary to add a lead block to the inside of the steel rim, and the average weight of the tire on both sides.

Zhang Suocheng stated that whether it is an ordinary steel ring or a lightweight aluminum ring, it may be deformed or broken when forced by certain external forces. Deformation of the rim may cause jitter during driving and uneven weight distribution on the rim. This may also cause vibration during driving. Incorrect rotation of the rim may also cause vibration during driving.

Zhang Suocheng suggested that the owner of the vehicle should shift the tire diagonally after each year of driving.

Four causes of automotive vibration: Tire deformation, aging, and sudden stoppage of the emergency brake will cause jitter. The jitter that the car undergoes during the driving process is far more dangerous to the driver than the jitter at idle.

Zhang Suocheng said that most of the vibrations of the vehicle when traveling are related to the transmission system, and the most basic one is the tire problem. If the owner suspects that the tire is causing the vehicle to shake while driving, the easiest way is to carefully touch the tire tread pattern. If the tread pattern is jagged, it indicates that the tire has undergone aging and deformation. In addition, the breakage of the steel wire inside the tire makes it impossible to effectively and evenly pull the rubber portion of the tire, resulting in a raised bag of the tire tread, which may also cause the vehicle to shake, and a puncture may occur at any time.

Zhang Wei also introduced the cause of the jagged tire tread pattern and the reason for the lifting.

Causes for tire pack up include: (1) Due to insufficient tire pressure, the inner steel wire of the tire is often excessively bent and stretched and breaks on its own; (2) The tire is not properly positioned, and the tire often wears out. As a result, the wire wears and breaks in this area. After the tread will start to pack. The reasons for the jagged appearance of the tires are: (1) the quality of the tire itself is poor; (2) it is often driven on bad road conditions; (3) the tire treads and the ground are beating after aging. Therefore, after the aging of automobile tires, the owner should replace the new tires in time, so as to avoid causing greater accident hazards.

In addition, Zhang Suocheng also said that if a car owner is used to driving an emergency stop, he can cause the brake disc to be uneven, which in turn causes the brake discs to be unevenly distributed, resulting in the occurrence of vehicle vibration during braking.