How to start, shift, brake in an automatic transmission

Automatic transmission gear classification. There are six gears on a typical automatic car, from top to bottom: P (Parking), R (Reverse), N (Neutral), D (Forward (Restricted), and L (Low).

How to shift the D gear. When ready to start driving, after stepping on the brake, push the gear lever forward in the D position, and then release the handbrake to the end, slowly step on the accelerator, after the car moves forward for a certain distance, release the brake, and continue to refuel, at this time, the car will automatically shift between 1 and 4 gears according to the speed. When driving on a normal flat road, there is no need for the driver to change other gears.

When going down a long slope, because the automatic car D gear does not have the function of engine brake braking, do not hang D gear all the time, otherwise the speed will be faster and faster, bringing potential safety hazards, and frequent braking will lead to overheating and excessive wear of the brake pads. D gear - limit gear shift method. In addition to the D gear, there are 3 or 2 gear limit gears on the transmission shift lever of most automatic transmission cars, and when the 3 or 2 gears are hooked, the maximum gear will be limited not to exceed 3 or 2 gears, so when encountering a relatively long downhill slope, the gear can be switched to 3 or 2 gears according to the slope and vehicle speed, so that the purpose of controlling the speed of the vehicle through the gear can be played.

When going up a large incline, or when starting on a more inclined slope, switching to 3rd or 2nd gear can get more power output, which is much more powerful than directly hanging in D gear. However, it should be noted that the general speed of the vehicle is reduced to less than about 40 km/h before you can change to D3 or 2nd gear. L (Low) gear - the method of shifting gears in low gears.

On ice and snow roads or when encountering traffic jams, due to the slow driving of the vehicle, if the D gear is hung it is easy to make the gear go up and down, increasing fuel consumption. It should be changed to L gear in time, so as to ensure that the vehicle is always between 1st or 2nd gear, so as to avoid increased fuel consumption and vehicle wear. Note that you must reduce to a suitable speed (usually less than 30 km/h) before changing to L gear.

P-shift parking shift method. When the vehicle wants to stop for a long time, especially on the ramp, it needs to change to P gear, and the wheels are in a mechanical locking state, which can ensure that the vehicle cannot move in a stationary state. It should be noted that the vehicle should be turned off before engaging the P gear and then unplugging the key.

If the engine is turned off again in the P gear, it will damage the transmission gear. Do not push into the P gear during the driving of the vehicle, otherwise it will cause great damage to the vehicle. R gear - reverse gear shift method.

When changing to reverse, some vehicles need to press the safety button mechanism on the gear shift to hang the gear lever on the R gear. It is important to note that you cannot shift into R gear when the car is moving, and you must not engage reverse gear until the car is completely stopped. N-gear - neutral shift method.

N gear can be used when the vehicle has just started or trailer, and can also be used when waiting for a signal or traffic jam or short stop, tighten the handbrake while engaging N gear, and press the brake to prevent rolling when stopping for a short time on a ramp. However, when going downhill, it is forbidden to coast in N neutral gear, which not only does not save fuel, but also damages the gearbox, and the neutral gear of the automatic transmission is very different from the manual transmission.

The force of the brake when the automatic transmission car starts and is in gear should be relatively large, and the brake pedal needs to be pressed to the end of the stroke with the sole of the foot.

If you don't step on the brakes or don't step on the end, the automatic transmission car will not be able to hang on the D gear, which is specially set to prevent the car from directly hanging to the D gear, the car rushes forward, and dangerous accidents occur.

When the brake is stepped on, the brake signal gives the computer signal, and the solenoid valve of the computer-controlled lock lever is de-energized, so that it can be hung into the D gear The reason for this design is to prevent the car from moving suddenly after hanging the gear, so there is a linkage mechanism that must first step on the brake lever to move.

The automatic gear starts to hang D gear, and the brake car is gone, and the gear shift is only when parking and waiting for the red light, the parking is in P gear, and the red light is in N gear.

The automatic transmission starts first, steps on the brakes, hangs D or R gear, releases the handbrake, lifts the brake to give oil to the person, and you don't have to worry about the automatic gear shift, the brake is to step on it.

The automatic transmission car does not need to step on the brakes to change gears, and all the gear shifting actions are completed by the gearbox independently, without manual intervention.

Generally speaking, when the automatic transmission car pulls the speed to a certain extent, such as 2500 rpm, release the throttle, the gearbox will automatically upshift, and keep stepping on the accelerator, and some automatic transmission cars will be controlled at a very high speed.

In short, when driving an automatic car, pay attention to loosening the throttle at a certain speed, which is conducive to upshifting and fuel-saving, and there is no need to step on the brakes when upshifting. When the brakes are applied to slow down, the transmission automatically downshifts.

The so-called automatic transmission, as the name suggests, does not require the driver to manually change gears, and the vehicle will automatically select the appropriate gear according to the speed and traffic conditions.

The biggest advantage of automatic transmission vehicles is convenience, especially in traffic jams, especially when encountering traffic jams and large uphill slopes, the advantages of automatic transmission are more obvious. Now automatic transmission cars are becoming more and more popular, from the perspective of advanced countries in the development of automobiles, most of the vehicles have been transitioned to automatic transmission, automatic transmission to replace the hand transmission to become the main model of daily driving is the trend of automobile development. Many riders are driving automatic transmission vehicles in the end, so it is of course possible to drive an automatic transmission car, but if the correct combination of road traffic conditions properly choose the right gear, then you can greatly reduce the burden of the automatic transmission, reduce the wear and tear of the transmission.

In order to make it easier for everyone to understand the reason, we will give an example of the use of automatic transmission restriction gear in combination with the actual driving situation.

Don't step on the end, when you step on the brake, he will automatically sense, automatically enter the "neutral" state, since it is "neutral" will not cause damage to the gearbox, this is like the brake on the electric bicycle power off, a little moment, he will automatically power off...

No, stepping on the brake is equivalent to sending a signal to the computer version, and then you can put the gear, there is no need to step on the end [There is a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

The nature of the brake is different from that of the clutch, as long as it can have a braking effect on the vehicle. The brakes need to be applied when the vehicle moves out of parking and when it is engaged in reverse, as long as there is this braking action!

When an automatic car is in gear, you need to apply the brakes.

The automatic transmission car gears are: P parking, R reversing, N neutral, D forward gear, here one by one to analyze why you need to apply the brakes.

When the car starts, P gear to D gear will pass through R gear, which will carry out a reverse impact on the gearbox on the way, damage the gearbox, and in the long run, the loss is not small, the correct way is to turn on the power supply, step on the brakes, and change D gear in ignition after hanging N gear.

P gear - that is, parking gear, the use of mechanical devices in the gearbox to lock the rotating part of the car, must be in the case of a complete stop of the vehicle can be used P gear, in addition to the car when the gear must be in the P gear.

N gear - that is, neutral, generally when stopping for a short time, it will hang neutral, at this time the right foot can leave the brake pedal to rest, but if it is up and down the slope, you also need to step on the brake, otherwise it will slip, unless you pull the handbrake, electronic brake, etc.

D gear - forward gear, drive gear, when the D gear is engaged, the driver only needs to control the accelerator pedal to control the speed, the transmission will automatically determine the gear according to the size of the throttle and the speed of the vehicle, no need to manually shift gears.

1. Foot brake start Qing Wangkong: On the premise of stepping on the foot brake, step on the clutch, hang a gear, release the clutch to the semi-linkage position, the body trembles slightly, the front of the car is cocked, and the foot brake is released at this time, and the vehicle begins to move forward slowly.

2. Handbrake start: There is no need to step on the footbrake when the handbrake starts, and the premise is to pull up the handbrake in order to stop stably on the ground with a certain slope. Here's how:

Step on the clutch and hang a gear, put your hand on the handbrake, release the clutch to the semi-linkage point, the body trembles, the front of the car is cocked, and the handbrake is immediately released, and the vehicle moves forward smoothly.

Automatic transmission cars have to apply the brakes when it comes to shifting gears. It is necessary to apply the brakes to achieve this, and the premise is to exchange R, P, and D gears. It is designed for safety, and this kind of sudden reverse gear during walking cannot and should not occur in standard driving.

Based on safety considerations: due to the existence of automatic clutch or torque converter in the automatic transmission, the car moves forward or backward immediately after the power is turned on, because the non-existent process is manual clutching, there is no need to worry about stalling at all, so the control of the car forward and backward can only be done by braking, due to the brake and accelerator on the same side, so the foot is not on the brake, or on the accelerator, to prevent the foot on the accelerator is the main purpose of the system to set the brake to shift gears, and the speed of the car is also controlled by the brake. Because the manual transmission has more shift gears, the forward gear 1-6 gears, the conversion is manual, so when shifting gears, you only need to step on the clutch to change gears, but if you shift into reverse gear is from the forward gear, you also need to step on the brakes first, and you need to stop the car after shifting into reverse gear.

Similarly, neutral shifting reverse gear is for safety, and some cars need to be forced, apply the brakes or add buttons, such as Volkswagen.

Automatic transmissions require the brakes to be applied when changing gears. The following is a detailed description: 1. You need to apply the brakes to shift to other gears in P gear:

Because the P gear is a parking gear, the locking mechanism jams the gearbox at this time, so that it cannot rotate normally, which belongs to the rigid locking function. The purpose is to prevent the road surface where the vehicle is parked from being uneven, which can lead to the dangerous situation of slipping and sliding. For example, in the half-slope and other road sections, the owner does not pull the handbrake, and the P gear can be cut out without stepping on the brake, and the vehicle will immediately slip back, and the consequences are unimaginable.

In order to prevent this from happening, the solenoid valve lock function is set in the P position, and the brake must be applied to release it. 2. N gear needs to be braked to cut into D gear or R gear: N gear is the neutral gear of the car.

The power of the engine is transmitted directly to the gearbox, at this time you can start the car directly without stepping on the brakes, and when the owner is hooked into the D gear or R gear, it will go forward or backward, if it is a case of operation error, it is also difficult to react quickly to brake, so there will be a risk of accidents.