有時在汽車行駛時，2檔上3檔、4檔上5檔沖擊、6檔下5檔沖擊、4檔降3檔沖擊、倒檔沖擊也會受到影響。汽車自動變速箱換檔沖擊故障是怎么回事？
Sometimes when the car is driving, the impact of gear 2 up to gear 3, gear 4 up to gear 5, gear 6 down to gear 5, gear 4 down to gear 3 and reverse gear will also be affected. What's going on with the shift shock fault of automobile automatic transmission?
去汽車服務站檢查，通過診斷儀診斷，自動變速箱控制單元無故障碼，動態數據流無異常。檢測發動機控制系統，顯示正常。用診斷儀檢測所有車身電路，顯示正常。在電路沒有故障的情況下，只有機械和油路兩個問題。選擇更換閥體總成，路試后故障現象不變。
Go to the car service station for inspection. Through the diagnosis with the diagnostic instrument, the automatic transmission control unit has no fault code and the dynamic data flow is normal. Check the engine control system and the display is normal. Check all body circuits with the diagnostic instrument and the display is normal. When there is no fault in the circuit, there are only two problems: mechanical and oil circuit. Choose to replace the valve body assembly, and the fault phenomenon remains unchanged after the road test.
根據業主提供的故障，進行多方位的分析，暫時排除電路故障。分析油路和機械方面，檢查自動變速箱部件工作表，分析車主提出的故障點。
According to the fault provided by the owner, conduct multi-directional analysis and temporarily eliminate the circuit fault. Analyze the oil circuit and machinery, check the working table of automatic transmission components, and analyze the fault points proposed by the owner.
從機械部件工作表可以看出，當2檔升到3檔時，B1制動器需要放油，K2離合器需要供油。如果B1延遲漏油，會有沖擊，如果K2提前嚙合，也會有沖擊。
It can be seen from the mechanical parts worksheet that when the 2nd gear is raised to the 3rd gear, the B1 brake needs to be drained and the K2 clutch needs to be supplied with oil. If B1 delays oil leakage, there will be impact. If K2 engages in advance, there will also be impact.
再次分析4檔升5檔的影響，K1離合器需要放油，K2離合器需要供油。在這里，K2參與了第二次升檔沖擊。懷疑K2更可能提前工作。
Analyze the influence of 4th gear to 5th gear again. K1 clutch needs oil drainage and K2 clutch needs oil supply. Here, K2 participated in the second upshift impact. It is suspected that K2 is more likely to work in advance.
看6檔降5檔的影響，是B1放油，K2供油。在這里，K2再次出現。懷疑K2提前搞的可能性更大。看4檔降3檔的影響，就是K3放油和K2供油。
Look at the impact of downshifting from 6th gear to 5th gear. It is B1 oil drain and K2 oil supply. Here, K2 appears again. It is more likely to suspect K2 in advance. Look at the impact of downshifting from 4th gear to 3rd gear, that is, K3 oil drain and K2 oil supply.
故障目標應該鎖定在K2離合器，但也需要分析K2離合器工作異常的原因是油路還是機械方面？遵循易到難的方法。
The fault target should be locked in K2 clutch, but it is also necessary to analyze whether the reason for the abnormal operation of K2 clutch is oil circuit or mechanical? Follow the easy to difficult approach.
從油路分析來看，油路由自動變速箱控制單元控制。如果自動變速箱控制單元不提前控制工作，油路將不會提前自動供油。
From the oil circuit analysis, the oil is controlled by the automatic transmission control unit. If the automatic transmission control unit does not work in advance, the oil circuit will not supply oil automatically in advance.
也就是說，汽車的油路控制只會延遲而不會提前（油路太臟，閥桿動作會延遲）。拆解自動變速箱，發現K2離合器活塞的錐形回位彈簧斷裂。
In other words, the oil circuit control of the car will only be delayed rather than advanced (the oil circuit is too dirty, and the action of the valve rod will be delayed). After disassembling the automatic transmission, it was found that the conical return spring of K2 clutch piston was broken.
由于錐形回程彈片斷裂，固定錐形彈片的兩張卡從兩側掉落。由于K2離合器活塞放油時沒有彈片幫助活塞回位，所以K2離合器摩擦片沒有間隙，潤滑油不能進入K2離合器摩擦片表面，干摩擦后摩擦片燃燒。
As the conical return shrapnel was broken, the two cards fixing the conical shrapnel fell from both sides. Since there is no spring plate to help the piston return when the K2 clutch piston discharges oil, the K2 clutch friction plate has no clearance, and the lubricating oil cannot enter the K2 clutch friction plate surface. After dry friction, the friction plate burns.
濟南自動變速箱維修人員提醒，由于K2離合器片之間沒有間隙，供油時K2離合器會立即接合；沒有緩沖器，導致升檔和降檔時都會受到沖擊，換檔時也會受到沖擊。故障目標確定，根據需要進行更換。完成后，重復測試，故障排除。
Jinan automatic transmission maintenance personnel remind that since there is no gap between K2 clutch plates, K2 clutch will be engaged immediately during oil supply; Without buffer, it will be impacted during upshift and downshift, as well as during shift. Determine the fault target and replace it as needed. After completion, repeat the test and troubleshoot.
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