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90% Of The Failures Of Automatic Transmission Cars Are Caused By The Shift Solenoid Valve
Nowadays, the proportion of family cars with automatic transmission is increasing. 90% of failures are caused by shifting solenoid valves. Therefore, we should not switch gears frequently during traffic jams. When traffic jams wait for a red light, we can apply the brakes in D gear.
What is the shift solenoid valve?
The left end of the gear shift/shift valve communicates with the shift solenoid valve through an oil circuit. When the solenoid valve is closed, no oil pressure acts on the left end of the shift valve, and the shift valve moves to the left under the action of the spring force at the right end; when the solenoid valve is opened, the main oil circuit pressure oil acts on the left end of the shift valve through the solenoid valve , Make the shift valve move to the right end against the elastic force of the spring, so that the oil circuit is changed and the shift is realized.
Netizens often ask: Do I have to switch to the N gear for the automatic transmission and other traffic lights? Will it hurt the car if I keep the D gear?
Injury to the car is not necessarily, because the service life of the car design has included the wear and tear of non-shifting.
The reason for the gap is:
1. Avoid clutch overheating
Even if the car is parked, the clutch is working, if it is low for a long time. Then its frequent clutch will cause the clutch to overheat. It is prone to the alarm of clutch overheating.
It is for this reason that when we stop and go in the city, you need to switch to the manual mode for dual-clutch, so that it does not change gears frequently.
2. Prevent the oil temperature of the gearbox from heating up too fast and the temperature is too high to affect the life of the gearbox.
The pressure oil of the main oil circuit acts on the left end of the shift valve through the solenoid valve, so that the shift valve moves to the right end against the elastic force of the spring, thereby generating the oil circuit change and realizing the shift. Shift gears frequently, and the oil temperature rises too high.
3. To prevent our feet from constantly stepping on the brakes and being inattentive and causing traffic accidents.
If you wait for the traffic light for a long time, even close to one minute, and you are seated in a car, even in a high-end car, the car will shake slightly, and the sound of the engine will be louder than the sound of the neutral gear. When the engine is turning, it has a forward force, but you are forcing him not to let him go forward, that is to say, one pulls forward and the other pulls backward. You only need to move your hand slightly to push your gear forward a little bit. Even many of us now are button-type, just a little cut.
After the neutral gear is released, his balance is released, and the car will not be in a state of suffocating energy all the time. From this perspective, you are also comfortable in the car.
It can also reduce our driving fatigue. Because if you step on the brake for a long time, step on the brake, and if you walk and stop, your feet will be very tired if you are stuck in traffic. Especially for this car without automatic parking, your feet will feel this if you drive for ten kilometers. The soles of the feet are hot. Therefore, the neutral gear will also help reduce our fatigue under our feet and make our driving more comfortable.
In addition, after the neutral gear is engaged, if we accidentally did not step on the brakes, or even if you accidentally stepped on the accelerator and stepped down, he would not immediately run out and take the car in front of you. On top, causing a rear-end collision. At best, the car just roared.
Some netizens hang on the P gear when parking. Although the neutral gear is relatively close to the P gear in theory, the UP gear has one more pawl than the neutral gear, which means that your car still has a gearbox in the gearbox. A hook to hook the rotation. When you wait for the traffic light, don’t rush into the P gear. If you hang up and you can be rear-ended by the rear car and push you forward, you may be injured.