At present, most cars are automatic transmissions, but vehicles that drive automatic transmissions are never changed and become a common phenomenon. The gear design of an automatic model is basically P, R, N, D, S, etc., but individual models also have other symbols. How much do you know about the meaning of the automatic gear symbol?
Automatic gear position introduction
The positions of the general automatic transmissions are: P (Park), R (Reverse), N (Neutral), D (Drive), D1; 2; 3; M+;- (Restricted) , L (low-speed) S (sport mode).
P block; parking method
When a vehicle wants to stop for a long time, especially when parking on a ramp, it needs to be replaced with a P block. At this time, the wheels are in a mechanically locked state, which can ensure that the vehicle cannot move under a static state. It should be noted that the vehicle should be put into neutral gear, put the handbrake on fire, and then put in the P block, then remove the key. If the P gear is engaged, turning the handbrake off will damage the gear. Do not push the P file during the vehicle's driving, otherwise it will cause great damage to the vehicle.
R block; use of reverse gear
When changing to a reverse gear, some vehicles need to press the safety button device on the gear stage to hang the gear lever on the R gear. It is important to note that when the car is moving, it is not possible to change into the R position, and it is necessary to hang the reverse gear when the vehicle is completely stopped.
N block; use of neutral gear
The N block can be used when the vehicle is just starting up or in a trailer. It can also be used when waiting for signals or traffic jams and for short-term parking. When the N-block is engaged, the hand brake must be tightened. When the ramp is temporarily parked, the car can be stepped off. Braking. However, prohibiting the use of N-block neutral coast on downhill is not only not fuel-efficient, but also damages the gearbox. The difference between automatic and neutral gear is quite different.
D block; How to use forward gear
When you are ready to start driving, after you step on the brakes, you want to hang the block into the D position, then loosen the handbrake, loose the brakes and step on the accelerator to get up. Continue to add the throttle according to your own speed, then the car will automatically be in accordance with the speed. Self-shifting between 1 and 4 gears. When driving on a normal road, there is no need for the driver to change another gear.
In the long slope, because the automatic gear D file does not have the function of the engine brake, do not always hang D gear, otherwise the speed will be faster and faster, causing security risks, and frequent brakes will cause the brake pads to overheat. Excessive wear.
L block; low gear shift method
This gear is one of the gears that a lot of friends will ignore. When a car is running slowly on a snowy or snowy road, if a D gear is attached, it is easy to make the gear up and down and increase fuel consumption. At this time, it is replaced with L block, which can ensure that the gear position of the vehicle is always between 1 and 2 to avoid increasing fuel consumption and vehicle wear. At the same time it is also more suitable for downhill!
S block; sports mode
Many of this stall's friends didn't know what it was doing for several years after they bought a car! S block motion mode, in this mode, the gearbox can be freely shifted, but the opportunity for shifting is delayed, which allows the engine to maintain a high speed at a high speed, instantly output a large torque, so that the vehicle power is increased, and other gears are used It will be slightly worse.
Although the car has S gear, but still do not recommend the majority of owners of friends often use this gear, because the use of S block, fuel consumption will increase. Because of the large amount of fuel injected at high speeds, the fuel consumption of the car will inevitably increase.
Although it is said that the speed can be increased instantaneously, generally, such gears are mostly used during overtaking. This gear is actually a time-delay upshift without changing other work links.
D1, 2, 3; M, +, -; What is the use of limit files?
Limiting gears are generally used when going uphill or downhill, for example; when 3 or 2 gears are engaged, the maximum gear is limited to no more than 3 or 2 gears, so when a long downhill slope is encountered, it can be based on grade and speed. The gear shifts to 3 or 2 so that it can control the speed of the vehicle through the gear.
In the case of a very large slope, or when starting on a relatively steep slope, switching to 3 or 2 gears can give more output power, or the slopes are too steep to climb with 1 gear, when downhill Braking with engine braking force is much stronger than directly blocking D gear. Try to avoid accidents caused by frequent brake pedal brakes causing overheating and excessive wear on downhill slopes.
M block is manual mode, the above +, - in fact, the function is also similar, that is, plus block, - that is, downshift, the same for the downhill more than the majority! The vehicle can directly switch to manual mode while it is in motion and does not require parking switch.
There is another kind of special limitation in these restricted gears, which the industry insiders call straight-line selection logic. In fact, when you are in manual mode, you select several gears and that is a few gears. Generally, the transmission will not be involved in changing gears. It will always keep the gear you put in. It will only help you downshift unless your speed is really slow. This kind of gear logic is mostly found in sports cars or models that emphasize sportiness.
Reasonable use of neutral can also achieve the purpose of fuel economy. For example, when waiting for a red light, pushing it to neutral (N) and pulling the handbrake will cut off the power output of the engine. At this time, it will stop at the “D†and stop the brake. It will definitely save fuel.
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