Large trucks have 12 gears, how to operate high and low gears? How do I shift gears?

First, generally drive this kind of car to learn to jump gears, there is a device on the gear lever that can go up and down, the 12-gear box is the low gear downward, and the upward gear is 7 to 12 gears. From the first gear to the 6th gear, when the seventh gear is hung, there is a high and low switch at the head of the gear to dial the switch to the top is high-end, and then the position of the 1st gear is the seventh gear, and so on.

Second, the French special twelve-speed gearbox, it is actually six gears except for the reverse gear, it is changed to the high grade through a high and low speed switch, the first gear to the sixth gear belongs to the low gear, and the seventh to the twelfth gear belongs to the high-end.

3. Technical requirements:

1. The technical requirements for gear shift can be summarized in eight words: timely, correct, stable and fast.

2. Timely: grasp the appropriate timing of gear shifting, that is, you should not increase the gear too early, nor should you reduce the gear too late.

3. Correct: The coordination of the clutch pedal, acceleration pedal and gear lever should be correct and coordinated, and the position should be accurate.

4. Stable: After shifting into the new gear, relax the clutch pedal to be timely and stable.

5. Rapid: The action should be fast to shorten the shift time, reduce the kinetic energy loss of the car, and reduce the fuel consumption.

Extended information: Gear shift is the abbreviation of "gear lever operation method", which refers to the operation process of the driver through various aspects of psychological and physiological movement to continuously change the position of the gear lever with the road conditions and the speed of the car. In the process of long-term driving, it has been spread by people because of its concise and direct name.

The frequency of use is very high. And how skillful the operation (especially manual transmission cars) directly affects the safety of people's driving.

The "gear lever operation method" is generally referred to only the "gear lever" itself; Gear shifting, on the other hand, includes not only the "gear lever operation method", but more importantly, all the psychological and physiological behavior processes including vehicle speed estimation and other aspects under the premise of achieving the target (shifting).

1. Shift from high-end to low-gear (downshift): When the car needs to downshift, after reducing the speed to a certain extent, lift the accelerator pedal and step on the clutch at the same time.

pedal, dial the gear lever from the gear position to neutral, then lift the clutch pedal and add a little empty oil.

2. Shift from low gear to high gear (plus gear): When the car needs to accelerate, after raising the speed to a certain extent, quickly step on the clutch pedal with the left foot, relax the accelerator pedal (accelerator pedal) at the same time, dial the gear lever from low gear to neutral, and lift the clutch pedal. Press the clutch pedal again and hook the gear lever into the next gear.

Finally, while relaxing the clutch pedal, smoothly press the throttle to keep the car going.

Precautions for driving trucks:

1. Shift gears in time, and you can't drag the gears, especially when you change gears in advance uphill to ensure backup power. In addition, a two-foot clutch is used when shifting gears to reduce gears and empty oil. Go downhill in low gear to avoid coasting in neutral.

2. According to the curved steering wheel, the sharp turn should be at an appropriate angle, fully considering the inner wheel difference, that is to say, the large and continuous bending situation is allowed, and the obvious bending should be reduced as much as possible and the centrifugal force should be reduced.

impact. 3. Gear, start to enter the normal route, immediately step on the accelerator pedal, rapidly increase the speed ratio of the gear, the gear is in the low-speed range, the clutch is to improve the engine and the vehicle after refueling, the engine and the vehicle do not shake, if the engine and the vehicle shake phenomenon, the speed is lower, the speed should be increased more.

4. If the vehicle is backlashed, it indicates that the increase in speed is too high and should be mentioned less. At this point, quickly shift the gear lever to a higher gear, then increase the revs, and in the same way, change the gear lever to the highest gear step by step.

Sixteen gears of large trucks adopt fast and slow bridges, there is a fast and slow bridge switching lever, through which the gear mode conversion can be realized, and then the gear conversion in each mode is carried out through the gear lever, and the specific operation steps are as follows:

1. Open the door on this side of the cab.

2. Press the brake pedal.

3. Turn the key to start the engine.

Fourth, the fast and slow bridge switching is realized through the fast and slow rod.

Fifth, hang up and drive through the gear lever.

Generally, Fast and ZF gearboxes are accurate to say that they are eight-gear and sixteen-speed, which is regarded as eight gears, but each gear has a half-gear, and when you need to use it, you need to use the half-gear paddles up and down and then clutch with one foot.

Which is the fast and slow bridge converter?

Eight large trucksGearsIt is similar to the normal 5-gear driving method of a car, and the operation method is the same as that of the gear. It's just that setting more gears allows the driver to shift gears more reasonably according to the speed of the car.

Because large trucks need a lot of power when starting at low speeds, they can be engaged in 1st gear when starting. There is no need for a very large amount of power during high-speed driving, and the gear can be put into the high gear.

Precautions: Shift gears and look down at the gear lever; Drive for a long time with a low regret beat smart speed. Generally speaking, high-speed gears are more fuel-efficient than low-speed gears.

Therefore, you should upshift in time after starting; When shifting gears, the clutch does not step to the end, causing damage to the gears. In addition, the foot should not be placed on the clutch when the clutch is not in use, resulting in excessive wear of the release bearing.

1. Driving fatigue is not possible: due to long-term and long-distance driving, truck drivers will inevitably experience fatigue and lack of concentration, and are more likely to doze off while driving, especially when the highway is relatively wide, straight and downhill, truck drivers are most likely to have visual paralysis and cause serious traffic accidents.

2. Overtaking skills should be correct: the user in the process of driving, if there is a truck in front of him, to overtake, the correct way is: first leave the large truck about 100 meters away, observe the road conditions ahead, ensure that there are trucks in front, and pay attention to the road conditions ahead, in ensuring that there are trucks in front, pay attention to the trucks in front, and pay attention to the road conditions ahead.

The schematic diagram of the stalls of the 8-gear large truck is as follows:

1. In the low-speed position:

The light left back pull is the first gear; The light left forward push is the second gear;

2. Neutral return: (in fact, you don't need to lean lightly to the right, it will automatically stop in the neutral position of three or four gears under the action of the return spring).

The direct pull-back is the third gear; Direct push forward is four gears;

3. After returning to neutral, turn right to the high-speed neutral position: (you can hear the sound of the air valve toggling the gear on the gearbox).

Don't lean lightly to the left, at this time, the gear stem has automatically stopped in the neutral position of four or five gears).

Direct pull back is the fifth gear: direct push forward is the sixth gear.

4. Lean to the right after returning to the neutral position:

The rear pull is in seventh gear; The forward push is eight gears.

5. On the basis of the neutral position of the first and second gears of the low-speed gear, lean hard to the left.

The rear pull is the reverse gear (R); The forward push is a half-gear (c).