How to increase or decrease the gear of automatic car uphill

Correct use of automatic gearbox

Many people think it's too easy to drive automatic wave's car. As long as you refuel, loosen oil and brake, you can be free and unrestrained. Admittedly, the use of automatic transmission does not need to loosen the clutch and throttle to match the shift, nor does it need a palm.

Grasp the timing of shifting, the coordination of throttle and clutch, etc. But that doesn't mean that we can drive a car equipped with an automatic transmission and brake with one foot on the accelerator. There is still a lot of knowledge to talk about.

Engine starting

The car equipped with automatic gear is different from the car equipped with M/T manual gear when starting: even if the shift handle is not in neutral, the engine can start safely and smoothly as long as the clutch pedal is pressed; But vehicles equipped with automatic transmission are different. If the shift lever is not in N (neutral) or P (parking) position when starting the engine, the protective function of the neutral start switch will cut off the engine start circuit, and the engine start motor will not get the driving power and cannot run. Some novices often turn the ignition switch with the key immediately after the vehicle is turned off, but they can't start the vehicle. In desperation, they had to turn to the maintenance center for help. When the maintenance personnel arrived at the scene, they found that the cause of the failure was that the shift handle did not move into N or P position.

At present, most cars adopt EFI electronic fuel injection system. When starting, the engine ECU will automatically extend the fuel injection time and increase the mixture concentration according to the engine water temperature, intake air temperature, starting and other signals, so there is no need to step on the accelerator as deeply as when starting the engine with carburetor, otherwise it will be redundant and useless.

Vehicle starting

Start the engine correctly and you can drive in gear. Some owner's manuals require the owner to warm up for a few minutes before the vehicle starts. In fact, there is no need to wait for the heat when the climate is not very cold. Just be careful not to refuel when the engine is not hot, so as to avoid the abnormal wear of the engine due to the weak volatility of gasoline and the adhesion of fuel to the cylinder wall and other parts, diluting the oil film between the engine oil and parts.

When starting, you need to step on the brake pedal, move the gear lever to the required gear position, then release the brake pedal and handbrake, and gently step on the accelerator pedal to start. Here, we should pay attention to the following points: the hand brake must be released or completely released, otherwise, because the hand brake is in braking or semi-braking state, the brake disc or drum will overheat, which will make the brake oil boil and produce air resistance, leading to braking failure or braking attenuation, which will lead to driving danger; Step on the gas in time. Don't step on the accelerator first and then put it in gear or step on the accelerator while putting it in gear. These improper actions will cause accidental damage to the automatic transmission and shorten its service life.

Ordinary road driving

When driving on flat roads such as cities and highways, you should hang the shift handle of automatic transmission in the "D" position and turn on the O/D overdrive switch. In this way, the automatic transmission can automatically select the gear according to the vehicle speed, throttle opening (throttle opening is proportional to the depth of the accelerator pedal), driving resistance, vehicle load and other factors, so that the automatic transmission can automatically rise and fall between the first gear, the second gear, the third gear and the fourth gear, and automatically select the gear that best matches the vehicle speed. At this time, the driver can also choose the position of the gear mode switch according to his driving style. For example, power mode can get better power (the function and form of mode switch have been introduced in detail in an article in this journal).

With the increasing popularity of private cars, fuel economy has been paid more and more attention, and how to get the best fuel economy has always been a topic of concern to car owners. In order to obtain better fuel economy, automatic transmission vehicles should pay special attention to the following points: (1) Under normal driving conditions, the gear mode switch should be in the economic or normal mode; Don't refuel violently while driving, step on the accelerator lightly and try to keep the accelerator pedal within the opening range of 1/2; The operation method of "upshifting ahead of time" is adopted, that is, after the vehicle starts, accelerate to the shift point range of 1 and 2nd gear of 20-30km/h, and then quickly release the accelerator for about 2 seconds. At this time, the automatic transmission is earlier than the general automatic upshift point, because the throttle oil pressure signal or voltage signal limiting the upshift of the automatic transmission is reduced. When you feel an upshift, you can press the accelerator pedal to continue accelerating. You can also use this method to upgrade the second gear to the third gear, which can improve the engine load rate, reduce the engine speed, save fuel consumption to a certain extent, and also help reduce engine wear and tear, reduce annoying noise during driving, and make driving more comfortable. This is a good way for automatic transmission to save fuel. However, shifting gears in advance will distract some attention, so I hope novices will not use this method on urban roads with many people and cars for the time being.

Most car owners report that the automatic gear accelerates slower than the manual gear and the power is weak. In fact, this is because the automatic transmission lost some energy in the process of power hydraulic transmission. Some readers wrote to ask how to get better acceleration pleasure when driving automatic transmission. In addition to setting the mode switch to Power, we can also adopt the operation method of "forced upshift", that is, step the accelerator pedal to the full open position quickly when driving. At this time, due to the increase of throttle oil pressure or the signal to the automatic transmission control computer, the automatic transmission is forced to land for the first gear to obtain a violent acceleration effect. However, when the acceleration is achieved, the accelerator pedal should be released immediately to prevent the engine from working at high speed for a long time.

Ramp driving

When driving on a normal slope, just put the stop lever in the D position and use the accelerator or brake pedal to control the speed of going up and down the slope.

At present, there are many disputes about whether it is correct to use D gear when automatic transmission is driving on slope. Some experts think it should be put in third or second gear.

According to the motion characteristics of automatic transmission and a lot of data, we think that the pole position when driving on the ramp depends on the geographical characteristics of the ramp. Take a 4-speed automatic transmission as an example: the fourth gear is usually an overdrive gear. If you drive on a ramp, the resistance is greater than the driving force and the speed decreases. When the vehicle speed reaches a certain speed, the gearbox will automatically drop from overdrive to third gear; However, if the vehicle is on a flat road between slopes or downhill, and the driving force is greater than the resistance, the vehicle will return to the overspeed gear. In this case, if the ramp is very long, it is easy to form a "cycle trip", which will aggravate the wear of clutch and brake friction plate in automatic transmission. At this time, as long as the O/D switch is turned off and the use of the overspeed gear is restricted, the car can go uphill stably in the third gear without forming a "cycle jump". If the slope is steep, the automatic transmission will form a "cycle stop" between the third gear and the second gear, so that the automatic transmission can climb the slope stably in the second gear. Most automatic gearboxes have L gear, which is the gear with the largest speed ratio and can be used on steep slopes at low speed for a long time.

If it is an ordinary ramp, the accelerator pedal should be completely released, the shift handle can be placed in the D position, and the speed can be controlled by foot braking intermittently. However, if the slope is too large, foot braking is often used to control the speed, the braking system will overheat, and the braking sensitivity will be reduced or invalid, because braking is too frequent. Therefore, at this time, it is necessary to move the parking lever into the second gear or L gear, and control the downhill speed of the vehicle by engine braking to reduce the burden of the braking system. However, when using engine braking, it is necessary to pay attention not to move into second gear or S and L gear when the vehicle speed is high, otherwise the friction plate in the automatic transmission will be damaged due to severe friction.

Driving on muddy, sandy and snowy roads

When driving on the road with low tire adhesion, the friction between the tire and the ground is very small, and the driving force is easy to break through the adhesion friction limit, which makes the driving wheel slip. The automatic transmission will mistakenly think that the vehicle will be upshifted at high speed, which will further aggravate the slip and make it possible for the vehicle to rotate and roll. At this time, the shift handle should be moved to the S and L positions to limit the top gear of the automatic transmission, and the speed should be controlled by the opening of the accelerator pedal to avoid slipping.

Temporary parking

Wait for traffic lights, traffic jams, guests, etc. , all need temporary parking. Many people are used to moving the gear lever to N position every time. In fact, this habit is incorrect, because every time they shift into N gear and then into D gear, the working parts in the automatic transmission will be reassembled. If there is a combination, there will be impact and the parts will reach the wear limit ahead of time. Therefore, the position of the shift lever should be determined according to the length of temporary parking time.

If the parking time is short, you can keep the parking lever in the D position and press the brake pedal with your foot, so you can restart the vehicle just by lifting your foot. If it takes a little longer, you can keep the lever in the D position, but be careful not to get too close to the car. It is best to use the foot brake and the hand brake at the same time to avoid close contact with the front car. However, if you wait for a long time, you must move the gear lever to the N position and use the hand brake to reduce driving fatigue and prevent the ATF automatic transmission oil from overheating and affecting the oil quality.

When some car owners get off to do temporary work, they often stop at the N gear and don't even brake. This is very dangerous, because sometimes there are children and other uncertain factors in the car. Children may imitate the driver's action of pulling the gear lever to make the car slide forward (when the automatic gear is in N gear, it can be moved into D drive gear without stepping on the brake) and have an accident, so in this state, the gear lever must be moved into P gear (parking gear) and the hand brake must be tightened.

Basic knowledge of driving an automatic car

Automatic gearbox is called at for short, and a car equipped with hydraulic automatic gearbox is called AT car. The gears of various AT cars are generally P-R-N-D-S(2)-L( 1):

P- Park gear, which is selected when parking or starting the engine. In this gear, the mechanical locking mechanism locks the output shaft of the gearbox, and the driving wheel of the car cannot rotate.

R- reverse gear, which is selected when reversing. At this time, the hydraulic control device is connected to the oil circuit of the reverse transmission, and the car can only reverse.

In use, it should be remembered that an automatic car cannot use semi-linkage like a manual car, so special attention should be paid to the control of the accelerator pedal when reversing.

N- neutral, selected when the engine is started, when the gearbox cannot output power.

When waiting for a signal or in a traffic jam, you often keep the shift lever in D and brake at the same time. If the time is short, this is allowed, but if the parking time is long, it is best to shift into N gear and tighten the handbrake. Because the selector lever is in the driving range D, the general driving trend of automatic transmission vehicles is weak. Braking for a long time is equivalent to forcibly stopping this trend, which makes the transmission oil temperature rise and the oil easily deteriorate. Especially when the air conditioner works and the engine idle speed is high, it is even more unfavorable.

N-type pulleys are strictly prohibited for AT vehicles. In order to save fuel, some car owners slide the shift lever to N gear when driving at high speed or downhill, which is easy to burn the transmission, because the output shaft of the transmission rotates at high speed and the engine runs at idle speed, the oil pump is insufficient, and the lubrication condition deteriorates, which is easy to burn the transmission.

D- driving gear, which is selected when the car is driving. In this gear, the hydraulic control device can automatically shift gears between 1 ~ 4 gear (or 3 gear) according to the signals of vehicle speed and throttle opening.

D is the most commonly used driving position. What needs to be grasped is that the automatic transmission determines the gear according to the size of the accelerator and the speed of the vehicle, so the operation method of the accelerator pedal is different, and the shift speed is also different. Step on the accelerator at the beginning, the shift will be late, and the acceleration will be strong. After reaching a certain speed, the accelerator pedal will be released quickly, and the car will immediately upshift, so that the engine has low noise and good comfort.

Another feature of D gear is forced low gear, which is convenient for overtaking at high speed. When driving in D gear, quickly step on the accelerator pedal to the end, turn on the forced low switch to automatically downshift, and the car will accelerate quickly. After overtaking, release the accelerator pedal and automatically upshift.

S (2)-2 speed, which is selected when light braking or instantaneous acceleration of the engine is required. At this time, the hydraulic control device can only be connected to the oil circuit of 1 and 2nd gear (the gearbox can only be lifted and lowered in 1 and 2nd gear).

L( 1)- low gear, selected when braking in loop, uphill or downhill. At this time, the hydraulic control device can only be connected to the oil circuit of 1 gear (the gearbox can only work in 1 gear, and cannot be upshifted or downshifted).

The position of gear selection when driving.

When the AT car is driving, if it shifts gears in the order of L-S-D, it is not limited by any speed conditions, that is, it can shift gears in this order regardless of high speed or low speed; If the shift is D-S-L sequence, it must be carried out under the condition that the actual speed is not higher than the corresponding upshift speed. For example, when downshifting in D gear, the vehicle speed is generally around 80Km/H, and rarely it can be downshifted to more than100 km/h. If the forced downshift exceeds the specified downshift speed, the engine speed will be reduced, while the speed on the gearbox side will remain high. This speed difference will lead to the rapid temperature rise of automatic transmission oil (ATF) and even damage the transmission. Therefore, special attention should be paid in use.

AT vehicles can make full use of engine braking when shifting into S gear or L gear on downhill, especially on long downhill, which is better than simply using D gear and braking. Because when the car goes downhill, the speed will increase because of its own weight. If the gear is selected in the D gear, the brakes will be used frequently, which will easily cause the wheel brakes to overheat or make the brakes fail, which is extremely dangerous when the car goes downhill. If you choose a gear in the low gear, you can make full use of the engine for combined braking (fear-assisted braking), thus reducing the wear of wheel brakes, and the automatic transmission will not upshift with the acceleration of vehicle speed in the low gear, ensuring the strongest engine braking.

In rainy and foggy weather, if the road surface adhesion conditions are poor, you can shift to S or L gear and drive at low speed. Don't use a position that can automatically shift gears to avoid the car slipping. At the same time, it must be remembered that when slipping, you can push the shift lever to the N position to cut off the power of the engine and ensure driving safety.

Overspeed-driving skills of automatic cars

In recent years, there are more and more automatic cars. Many people choose automatic cars for convenience. But after finding the feeling of easy driving, I can't help but feel that it is not tasteful enough. It seems that the overall performance is always slightly inferior to that of a manual car. Just like fully automatic cameras (commonly known as "stupid cameras"), automatic cars are also called "stupid cars" by some people. As we all know, the camera can automatically adjust the exposure and control the flash to fill the light, but if you want to pursue special effects, you need to enable some special functions on the camera. The same is true of driving an automatic car. Just using parking gear (P gear), reverse gear (R gear), neutral gear (N gear) and forward gear (D gear) can completely meet the needs of general driving, but if you encounter some special driving environment, you need to use gears with other functions. Therefore, if the correct control mode can be selected, the automatic transmission car will perform better than the manual transmission.

First, use each gear correctly.

Many drivers don't know much about the structure and principle of automatic transmission when they first drive it. When driving, they often use a D to block the whole journey, and only use N, R and P gears when parking during the period. As for other gears, it is useless, which is unfavorable to the power, economy and safety of the car. Therefore, before driving an automatic car, it will be of great help to improve driving skills if you can understand its correct use.

At present, many automatic cars are equipped with "limit gears", that is, "1", "2", "3" and "4", which are used to limit the shift timing of automatic transmission, thus achieving the purpose of continuously improving the engine speed and benefiting the output of engine power and torque. For example, if "Limit 1 gear" is used, when the engine speed and vehicle speed increase, the automatic transmission will not increase the gear (except the automatic transmission with engine overspeed protection function), but when "Limit 2nd gear" is used, the automatic transmission can only switch between 1 and 2nd gear, and so on. It is precisely because of the special function of "limit gear" that the use of "limit gear" often gives people a feeling similar to driving a manual gear, and the power of the car is easier to show, so some people call "limit gear" "sports gear". Especially when there is a need for rapid acceleration (such as overtaking), changing the "D" gear to the "3" gear can obviously improve the "throttle lag" feeling that is common in automatic transmission vehicles. Another function of using the "limiting gear" is to control the vehicle speed by using the restraining force of the engine. When going downhill for a long time and a long distance, especially on steep slopes, using the "limit stop" can increase the safety of the car, reduce the braking times, and avoid the braking effect attenuation caused by overheating of the brake shoes. Another use of the "limit gear" is when torque is needed. When the wheels are stuck in muddy potholes, or when going uphill, using the "limit gear" will make the car look more satisfactory.

The function of P and N gears is to make the engine and wheel drive system not work. The difference is that when the engine stops running, putting N gear can push the vehicle. When the P gear is engaged, the transmission shaft is locked on the transmission housing with a mechanical lock pin. Therefore, if the vehicle is dragged down by force in the P-gear state, it will lead to the damage of the automatic transmission housing and a great loss. At the same time, when parking on the up and down slopes, don't just use the P gear to brake the vehicle, but also firmly tighten the hand brake to avoid the damage of the P gear mechanical lock due to excessive force. Only when the vehicle is in the P position can the ignition switch key be pulled out. Only in P or N gear can the motor be started to start the car. P-gear start is a common mode, and N-gear start is used when the engine is turned off during driving. If the engine stops suddenly during driving, please carefully move the gear lever to N position under the condition of ensuring driving safety, and then restart the engine to resume normal work.

The "P" gear (parking gear) of an automatic car has a certain braking effect, so when the gear is in the "P" gear, the car will not move even if it is not braked or manually braked. But in the "n" gear (neutral), it is different. At this time, if you don't step on the brakes and pull the hand brake, the car is likely to move. Even on the flat ground, the car may move slowly under the action of the hydraulic coupler. Therefore, when using the "N" gear when waiting for a red light or traffic jam, you must step on the brake or pull the hand brake, and it is best to put the gear in the "P" gear when parking for a long time.

The use of D gear is more complicated: there are three gears and four gears in general automatic transmission. The fourth gear is also called overspeed gear, which is written as "OVER DRIVE" or "O/D" in English, followed by "third gear", "second gear" or "first gear" (also called L gear). Their gear setting rules are: the high gear is backward compatible, and the low gear cannot automatically shift upward. That is, if the fourth gear is selected, the transmission can automatically choose a reasonable gear between the first gear and the fourth gear according to the speed and usage of the vehicle, and automatically shift up and down. If you choose the second gear, you can only switch between the first gear and the second gear automatically, and you can't move up to the second gear or above. At this time, after the vehicle speed is increased, the engine will overspeed.

Many automatic cars are equipped with some "function keys". If you can't use these functions correctly and skillfully, it will not only reduce driving pleasure, but even affect safe driving.

"S" key: At present, many new automatic gearboxes are equipped with "S" key, that is, sports mode key. Press this key, the shift timing of "D" gear will also change, and the automatic shift will be carried out in the area with high engine speed, and the dynamic performance of the car will be fully exerted. However, when using the "S" key to start the sports mode, it is different from using the "limit gear", that is, only the shift timing is adjusted without limiting the shift gear, so the engine will not overspeed. The sports function and style of the "S" key are generally suitable for drivers who like to accelerate quickly, but the fuel consumption will increase when starting this function.

"W" key: it is the key of snow driving mode, and its function is just the opposite of "S" key. When this mode is turned on, the torque of the engine is restrained and will not reach the peak of torque soon, thus reducing the probability of wheel slipping and idling when driving in snow. In fact, as long as you start driving on the slippery road, turning on the "W" key can make the car start smoothly and avoid the tail side swing.

"OD" key: that is, overspeed key. At present, some designs combine this function with the "D" position in the gear. When the vehicle speed and engine speed reach a certain range, it will automatically shift to the overdrive gear, that is, the speed of the transmission shaft is greater than the engine speed. However, on some models, the "OD" gear is set in the form of a button alone, and the "OD" key must be turned on during operation before the transmission can enter the over-ratio state. The purpose of starting the "OD" key is to make the vehicle run more economically and fuel-efficiently.

Second, driving skills.

Automatic transmission system and manual transmission system are two completely different designs, with different working principles and expressions besides the same ultimate working purpose. However, whether it is a manual transmission or an automatic transmission, as long as it can be operated correctly, it should have similar performance in theory. Most people feel that the automatic transmission car is not as powerful as the manual transmission car, mainly because the operation is wrong. Although automatic cars are labor-saving and easy to operate, it is not enough to step on the accelerator and brake pedal like electric cars, and some operating skills must be mastered.

Under the program control of the computer module, all the existing automatic gearboxes have certain intelligent functions, which can help drivers to adjust the driving state and shift timing according to their different driving habits. However, computers can't fully satisfy people's driving intentions. For example, the sudden acceleration when overtaking is difficult to complete in a short time only by the ability of the gearbox computer. So, at this time, you have to release the foot on the accelerator, and then step on it, so that the engine speed can be quickly increased and the car can be quickly lifted.

When a car turns, refueling is not only related to speed, but also to safety, especially for front-wheel drive cars. Turning when refueling is safer and easier to control than reducing fuel consumption or slipping (most cars are front-wheel drive now), so the turning method of automatic transmission cars is slightly different from that of manual transmission cars. You can use manual gear to slow down more accurately, and after braking, you can quickly increase the speed by shifting gears, so the speed is light when cornering. The refueling speed of automatic transmission will be delayed for a short time after braking and deceleration, so the car driving automatic transmission should brake earlier when cornering, reduce the speed, and then refuel to make the car turn under traction.

Although the automatic gearbox is also designed with a "limit gear", which can intentionally control gear shifting like a manual gear, this does not mean that the automatic gear can be operated completely according to the manual gear when driving. This will aggravate the wear and tear, which may damage the engine or gearbox if used improperly. As for the manual mode operation of automatic/automatic transmission, it is another matter.

When an automatic car is driving in the urban area, if the speed can't exceed 60 km/h, it is necessary to use a gear lower than D gear, which can make the acceleration flexible and avoid carbon deposition. When the speed exceeds 60 km/h, driving in D gear will not only save fuel, but also not affect the acceleration. When driving on mountain roads, you should use the 2nd gear or 1 gear as appropriate. The effect of engine braking can not only maintain strong torque output, but also ensure driving safety. D gear of automatic transmission does not have the function of engine braking, and it will shift to high gear with the increase of vehicle speed when going downhill, making the vehicle speed faster and faster. It is very dangerous to constantly control the speed with the foot brake, and it is easy to make the brake fail if it is used excessively. Therefore, when an automatic car goes down a long slope, it must not use D gear to avoid accidents.

When the automatic transmission car breaks down and needs to be sent to a repair shop for repair, the trailer operation must be paid attention to, and it must not be quick and easy, otherwise the transmission will be damaged. If conditions permit, it is best to lift the driving wheel first and then drag it. If you can't do it, you must pay attention to the speed of the trailer, which should not exceed 35 km/h, and the distance of the trailer should not be too long, preferably within 65 km.

In a word, the driving of automatic cars is not as automatic as people think. I advise car owners who drive automatic cars to take some time to find out the reasons so as to deal with them.

The advent of automatic gearbox has eased the driver's nervousness when driving. Because there is no need to shift gears during driving, the driver can concentrate on observing the situation around the vehicle, and because of the precise electronic control device, the automatic gearbox can not only adapt to various driving conditions, but also adapt to different driving styles. This means that the shift timing depends on the driving mode, engine load, vehicle speed and engine speed, so as to make full use of the effective power of the engine.

Taking Jetta City Pioneer's four-speed automatic gearbox as an example, this paper introduces the operation method and key points of automatic gearbox to you.

The shift lever and gear of the four-speed automatic transmission are shown in the figure. The gear symbols are p, r, n, d, 3, 2, 1 respectively.

P (Park)-Park.

For safety reasons, the shift lever must be placed in the P position before leaving the vehicle, especially when the engine is running.

P gear, the automatic gearbox is in neutral, and the mechanical lever will lock the output shaft to prevent the vehicle from slipping. Of course, only when the vehicle comes to a complete stop can the shift lever be placed in the P position. ..

The shift lever is controlled by a locking device controlled by an electromagnet. Therefore, only by applying the foot brake and pressing the side button of the gear lever can the gear lever be moved out of the gear position P to ensure safety. Many cars are also equipped with interlocking devices. Only when the shift lever is in the P position can the car key be pulled out.

Parking position p cannot completely replace the handbrake. When parking for a long time or on a slope, you must use the hand brake, otherwise it will easily damage the automatic transmission locking mechanism.

R (reverse gear)-reverse gear.

Only after the vehicle has come to a complete stop can it be put into or put out of R gear, otherwise it will cause early wear and tear of the automatic transmission.

neutral

If you need to push or tow the vehicle, you must choose N gear. When towing the vehicle, the towing speed should not be greater than 50km/h and the towing distance should not be greater than 50km, otherwise the planetary gear mechanism of the automatic transmission will be damaged.

When the vehicle is stationary and the ignition switch is turned on, you must press the brake pedal and press the button on the side of the shift lever to exit the N gear ... When the vehicle is driving, if the speed exceeds 5 km/h, just press the button on the side of the shift lever to move out or shift into the N gear. ..

D (drive)-drive gear

Only when the brake pedal is depressed and the button on the side of the shift lever is pressed can the shift lever be moved out of the gear position P or N and shifted into the driving gear position. D gear is the most commonly used gear. In the D gear, the automatic gearbox first selects the first gear to start the vehicle, and then gradually rises to the first gear, the third gear or even the fourth gear according to signals such as throttle opening and vehicle speed. Similarly, when the vehicle slows down, the automatic transmission will automatically downshift from the corresponding gear.

3- Slope gear

If the third gear is selected, the gearbox can only be upgraded to the third gear when driving, and this gear can be selected when encountering a slope. At this time, the automatic gearbox will automatically shift gears in 1, 2 and 3. When going downhill, you can use the braking function of the engine by choosing this gear.

Double long bevel file

If 2nd gear is selected, the transmission can only be upgraded to 2nd gear at most while driving. This gear position is very useful when driving along long curved slopes, otherwise the automatic transmission may shift gears frequently. If this gear is selected when going downhill, the engine can be used for braking.

1- steep slope gear

If 1 is selected, the vehicle will always run in 1 and the gearbox will not be upgraded to other gears, so that the braking force of the engine can be exerted to the maximum extent. So you can choose this gear when going down a steep slope. 1 can only be selected when the vehicle speed is lower than 30 km/h.

Forced low switch

The automatic gearbox is equipped with a forced low speed switch. When accelerating rapidly, the forced low-speed switch can only be engaged when the accelerator is stepped to the end, thus realizing rapid acceleration. At this time, the automatic gearbox will downshift according to the road conditions and engine speed to meet the needs of rapid acceleration, or the engine will upshift after reaching a higher speed.

pay attention to

Remember, when the engine is idling, if the shift lever is still in the drivable position, the power output by the engine to the driving wheel will not be interrupted, and the foot must be braked to prevent the vehicle from running.

Because the hydraulic oil pump of 0 1M automatic transmission is driven by the engine power output in one direction, Jetta Urban Pioneer cannot start by traction.

When the electronic control system of the automatic gearbox fails, the automatic gearbox is in an emergency state. At this time, the automatic gearbox has only three gears: R, 3 and L.

Third gear, you must go to the special service station for maintenance in time at this time, otherwise it will cause greater losses.

References:

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