For beginners, manual transmission is actually no more fuel efficient than automatic transmission. In order not to let the car out of the flame, novices always like to step on the accelerator at the beginning. If there are automatic cars, there is no such situation. Nowadays, many autopilot cars are equipped with CVT. Fuel injection is more accurate than before. It is more fuel-efficient than manual gear and more prone to failure. Let's talk about the acceleration fault caused by the automatic transmission torque converter.

1、故障現象

1. Fault phenomenon

該車在中低速時啟動正常，但沒有高速，而中速油門的高速度僅約80-90km/H；增加油門開口，高速度僅約110~120km/h。

The car starts normally at medium and low speed, but has no high speed, while the high speed of medium speed throttle is only about 80-90km / h; By increasing the throttle opening, the high speed is only about 110 ~ 120km / h.

2、故障診斷方法

2. Fault diagnosis method

當支撐導向輪的單向離合器卡住時，感覺有點像發動機排氣不平穩，但是當發動機排氣不平穩時，很難起動。打開空氣濾清器的上蓋并拆下濾芯。當發動機快速加速時，此處可看到廢氣回流，而支撐導向輪的單向離合器被卡住，這將不會導致廢氣回流。從油色判斷，一切都正常，故障診斷儀找不到故障，發動機失速轉速正常。

When the one-way clutch supporting the steering wheel is stuck, it feels like the engine exhaust is not stable, but when the engine exhaust is not stable, it is difficult to start. Open the upper cover of the air cleaner and remove the filter element. When the engine accelerates rapidly, the exhaust backflow can be seen here, and the one-way clutch supporting the steering wheel is stuck, which will not cause the exhaust backflow. Judging from the oil color, everything is normal, the fault diagnosis instrument can not find the fault, and the engine stall speed is normal.

3、故障現象

3. Fault phenomenon

當車輛在30-50公里/小時的速度下行駛時，在通過低速區后，加速不好、提速慢、加速性好，液壓變矩器中帶支撐導輪的單向離合器很可能會打滑。

When the vehicle is running at the speed of 30-50 km / h, after passing through the low speed zone, the acceleration is not good, the acceleration is slow and the acceleration is good, and the one-way clutch with supporting guide wheel in the hydraulic torque converter is likely to slip.

4、故障診斷方法

4. Fault diagnosis method

發動機加熱后，進行失速試驗。例如，發動機的失速速度明顯低于自動變速器的速度限 制，表明液壓扭矩轉換器中支撐導輪的單向離合器滑動。

After the engine is heated, the stall test is carried out. For example, the stall speed of the engine is significantly lower than the speed limit of the automatic transmission, indicating that the one-way clutch supporting the stator in the hydraulic torque converter is slipping.

5、故障分析

5. Fault analysis

變矩器的低速扭矩增加取決于導向輪，以改變液流的方向。本發明的有益效果是：在變矩器卡瓦中支撐導向輪的單向離合器后，導向輪不具有單向離合器的支撐，當扭轉情況增加時，不能改變液流的方向。以此方式，由導向輪返回的液流的流動方向與泵輪的旋轉方向相反，并且發動機需要克服由反向液流引起的附加負載，因此液力變矩器變成液壓聯接，并且低速扭轉增加變為低速轉矩下降，因此在低速區域(變矩器增加扭矩條件區域)的車輛的加速度差。

The low speed torque increase of torque converter depends on the guide wheel to change the direction of fluid flow. The beneficial effect of the invention is that: after supporting the one-way clutch of the guide wheel in the slip of the torque converter, the guide wheel does not have the support of the one-way clutch, and when the torsion situation increases, the direction of the liquid flow cannot be changed. In this way, the flow direction of the fluid returned by the guide wheel is opposite to the rotation direction of the pump wheel, and the engine needs to overcome the additional load caused by the reverse fluid flow, so the hydraulic torque converter becomes a hydraulic connection, and the low-speed torque increases to the low-speed torque decreases, so the acceleration difference of the vehicle in the low-speed region (torque converter torque increase condition region) is small.

6、維修方法

6. Maintenance method

更換變矩器總成或使用車床切削液力變矩器，然后更換導輪和單向離合器以消除故障。

Replace the torque converter assembly or use the lathe to cut the hydraulic torque converter, and then replace the guide wheel and one-way clutch to eliminate the fault.

汽車齒輪車越來越流行，但相當多的人不知道自動變速器的狀況。

Gear cars are becoming more and more popular, but quite a lot of people don't know the condition of automatic transmission.