How does the automatic D1D2D3 work?

The D1, D2, and D3 of the automatic transmission are all limit gears, which can lock the vehicle in fixed forward gear without upshifting or downshifting, and the transmission will not jump to a higher gear. D1, D2, and D3 can be switched while driving, but it should be noted that when switching to low gear at high speed, the vehicle will have obvious engine braking, and this deceleration brake light will not light up, which may cause misjudgment of the rear vehicle.

D1, D2, D3 are used correctly".

The D1 is similar to the 1-2 gears of the manual transmission, and the maximum torque output of the gear ratio is the strongest, which is suitable for use when going up steep slopes or towing other vehicles.

The D2 is similar to the 3-4 gears of the manual transmission, and the torque output will be reduced when the gear ratio is reduced, which is also suitable for climbing or trailering.

D3 is similar to the 5-6 gears of manual transmission, with moderate torque and power output ability, and direct cutting in driving can reduce the gear to obtain large torque output overtaking, and the advantage is that there will be no obvious setback, and the throttle response will be more rapid.

Here we use a similar technique, d1, d2, d3 and manual transmissions are closely illustrated. However, it should be noted that D1, D2, D3 and the real manual transmission are not the same, the actual operation experience is still quite different, and do not expect the automatic transmission to switch to D1, D2, D3 to enjoy the driving pleasure of manual transmission.

D3 means to force the gear to be controlled between 1-3 gears; D2 is a 1-2 stop. This is the low-speed function of automatic transmission, and the most important thing is to control the speed of the vehicle for a long time downhill to avoid heat exhaustion caused by excessive use of brake pads. Urban roads are less used, and sometimes stop-and-go when engaging a low gear prevents a vehicle with poor throttle control from passing forward.

The low gear can be put into the upper gear, otherwise the car should be lowered and then put into the low gear, otherwise it will slam down.

1, D1, D2 refers to the low-gear mode of the gearbox. You can directly hang D1 and D2 gears without braking while driving, but do not do this when the vehicle speed is high and the engine speed is high.

2. Taking the 5-speed automatic transmission as an example, in the normal forward gear D mode, the transmission forward gear will jump between 1-5, while on D2, the transmission will only jump between 1-2, and will not rise to the high gear like 3-4-5. In D1 gear, the gearbox will only be in 1st gear and will not go up to 2nd gear and above. When going down a hill or down a long-distance slope, hang the gear on the D1 and D2 low gear, which can limit the gear of the car to automatically only be in the low gear, and can make the car use engine power to brake when going downhill, and the driver does not need to step on the brakes for a long time to cause the brake pads to overheat and cause danger.

It is most useful in situations of severe traffic jams and on slopes with large slopes. When going up or down a slope, you can make full use of the torsion of the car engine.

3. The gears of the general automatic transmission vehicle gearbox are P, R, N, D, S:

p Parking gear. When the car is parked, the gear selector lever must be pulled into the P position.

rReverse. n Neutral. The n position is equivalent to neutral and can be used when starting, when people are not leaving the vehicle and parking, or when towing a vehicle.

d Forward gear. When driving normally, the gear selector lever is placed in the D position, and the car can automatically shift between the forward gears. D is the most commonly used gear.

S gear is the sport mode of the car (S is the abbreviation of SPORT) In the S gear sport mode, the gearbox can change gears freely, but the opportunity is delayed when shifting, so that the engine can be kept at high rpm for a long time, so that the car can travel at low gear and high speed for a long time, and then obtain greater torque output and acceleration. When the car is moving, it is enough to push the gear knob directly into the S gear, which is usually used when climbing hills and overtaking speed quickly.

1. D1: The highest gear is equal to the 1-2 gears of the manual gear (generally used in climbing);

2. D2: The highest gear is equal to the 3-4 gear of the manual gear (generally used when the road is congested and stop-and-go);

3. D3: The highest gear is equal to the 5-6 gears of the manual gear (the most commonly used gear);

4. D gear: the general gear used when driving.

Automatic. D1, D2, D3 means limiting gear. Correct use of the restriction gear:

Many automatic transmissions have "limited gears", i.e. "1", "2", "3", "4" and other gears.

Its function is to limit the automatic transmission.

In order to achieve the purpose of continuous increase in engine speed, it is conducive to the output of engine power and torque.

With "Limit 1st Gear", when the engine speed and vehicle speed increase, the Mu Crack automatic transmission will not follow the gear increase, while with "Limit 2nd gear", the automatic transmission can only switch between gears, and so on.

In automatic transmission, D1, D2, and D3 mean limited gear. Correct use of the restriction gear:

Many automatic transmission cars are equipped with "limited gear", that is, "1", "2", "3", "4" and other gears, whose function is to limit the shift time of the automatic transmission, so as to achieve the purpose of continuous increase in engine speed, which is conducive to the output of engine power and torque.

With "Limit 1st Gear", when the engine speed and vehicle speed increase, the automatic transmission will not move up the gears with it, while with "Limit 2nd Gear", the automatic transmission can only switch between gears, and so on.

The D1, D2, and D3 of the automatic transmission car are all limited gears, and the application of limited gears can lock the car in front of the car without upshifting or downshifting, and the transmission is not easy to jump to more gears to run. D1, D2 and D3 can be switched during operation, but it should be noted that when quickly switching to low gear, the vehicle will have significant engine braking, and this kind of slowing and reversing lights are not easy to flash, which may lead to the wrong judgment of the rear car.

D1, D2, D3".

D1 is similar to the 1-2 gears of manual transmission, and the maximum torque speed output of the gear ratio is the most, which is suitable for application when going up the slope or towing other vehicles;

D2 is similar to the 3-4 gears of manual transmission, the gear ratio is reduced, the torque output will also be smaller, and it is suitable for uphill or supporting cars;

D3 is similar to the 5-6 gears of the manual transmission, with medium torque and power output working capacity, and entering immediately in the exercise can reduce the gear to get a large torque output for high-speed driving, and the advantage is that there is no very obvious jitter, and the accelerator pedal response will be faster.

A similar technique is used here, showing the proximity of D1, D2, D3 and manual transmissions. However, it must be noted that D1, D2, D3 and the real manual transmission are not the same, and the operation process experience may be very different, and we cannot hope that the automatic transmission car can enjoy the driving pleasure of manual transmission when switching to D1, D2, and D3.

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