Why is there a setback when an automatic car refuels? What is the reason?

Clean the throttle. Dirty throttle causes poor acceleration.

1, the oil circuit is blocked, so clean the oil circuit, nozzle, oil circuit and oil pipe.

2. The automatic car started, and there was a normal situation of frustration. If you want to accelerate quickly when driving, you need to step on the accelerator deeply. At this time, the automatic gearbox will automatically downshift to increase the engine speed, and then upshift when the speed reaches a certain height. After the upshift, because the speed will drop obviously, there will be a more obvious sense of frustration.

This often happens in automatic transmission models with fewer gears, such as 4-speed automatic transmission models. After the automatic transmission vehicle starts, if you want to drive smoothly, you can lightly step on the accelerator at an appropriate time, and the transmission will automatically upshift. At this time, the sense of shifting is weak; If you want to maintain good acceleration performance, you need to step on the accelerator pedal deeply, and the automatic transmission will rise to a higher gear at a higher speed, at which time the shift frustration is obvious.

3, automatic start-stop plus dual-clutch gearbox, itself has this problem.

4. If the ignition is abnormal, replace the spark plug or high-voltage bag.

5. In many cases, the damage is not the internal valve body, but the stubborn dirt and impurities inside, especially the dirt and impurities inside the valve body gather to form a blockage, which leads to the inability to effectively adjust the oil pressure, leading to frustration, impact and slippage.

At the same time, the problem of high gearbox temperature can not be ignored. High temperature will destroy the quality and friction characteristics of automatic transmission oil, increase friction and wear, and the noise of transmission will follow. At the same time, sludge (impurities or dirt) will also be produced inside the transmission (such as the valve body), which will lead to the frustration and impact of the transmission.

About automatic transmission

Automatic gear, as the name implies, means that the driver does not need to manually shift gears, and the vehicle will automatically choose the appropriate gear according to the driving speed and traffic conditions. Generally, there are six gears in an automatic car, which are P, R, N, D, S and L from top to bottom.

An automatic car can fully meet the general driving needs only by using parking gear P, reverse gear R, neutral gear N and forward gear D, but if it encounters some special driving environment, it needs to use other functional gears. Therefore, if the correct control mode can be selected, the automatic transmission car will perform better than the manual transmission.

References:

Baidu Encyclopedia: Automatic Transmission