How to drive an automatic transmission car? drive automatic
Still in D gear when parking for a long time
In traffic jams or traffic lights, car owners like to only press the brake pedal, but keep the shift lever in D gear without shifting. If the time is very short, this is possible. If the parking time is long, it is best to change into N gear (neutral) and tighten the parking brake. Because when the shift lever is in D gear, automatic transmission cars generally have a weak forward movement. If you step on the brake pedal for a long time, it is equivalent to forcibly stopping this forward movement, which increases the transmission oil temperature and makes the oil easy to deteriorate, especially when the air conditioning system is working and the engine idling speed is high. It is said that today's automatic transmission can withstand about 5 minutes of braking in D gear. Theoretically, there is no need to put in neutral when waiting for a red light. However, I think it is better to be conservative. After all, there are also some disadvantages. Automatic transmissions are relatively backward, and there are many old cars.
Never push into P gear while driving
Never push into P gear while the vehicle is running, unless you don't want the car anymore. When you need to change direction, be sure to wait until the vehicle comes to a stop before switching gears.
The vehicle is not stable, do not put it in P gear
After parking, you must turn off the engine and put it in P gear to pull out the key. Many people are used to stopping and pushing directly to P gear before turning off the engine and pulling the handbrake. Careful people will find that this operation, after turning off the engine, the general vehicle will move a little back and forth due to uneven road conditions. At this time, the P gear transmission has a locking mechanism that bites the transmission gear. At this time, the movement will cause a little impact on the transmission gear. The correct approach should be: after the car enters the parking position, step on the brake and pull the gear lever to N gear, pull up the handbrake, release the foot brake and then turn off the engine, and finally push the gear lever into P gear. Especially when parking on ramps. It is possible that next time you start the car, it will take a lot of effort to cut out the P gear.
N block coasting
Do not hang into the N gear for coasting while driving, because the automatic transmission needs lubrication. When the gear is placed above the N gear during driving, the oil pump cannot supply oil normally for lubrication, which will increase the temperature of the internal parts of the transmission and cause complete damage. Because the output shaft speed of the transmission is very high at this time, and the engine is running at idle speed, the oil supply of the transmission oil pump is insufficient, the lubrication condition deteriorates, and for the multi-plate clutch inside the transmission, although the power has been cut off, its passive plate runs at high speed under the drive of the wheel, which is easy to cause resonance and skidding, resulting in adverse consequences. In addition, high-speed neutral coasting is also very dangerous, and it does not save fuel. Sliding to a stop at low speed can be hooked into the N gear in advance, but it has no effect.
Start the engine in gear other than P or N
Some drivers start the engine in gears other than P or N, and although the engine cannot run (because the interlocking mechanism protects it, it can only start in P and N gears), it may burn out the neutral start switch of the transmission. Because the automatic transmission is equipped with a neutral start switch, the transmission can only start the engine in P or N gears to avoid causing the car to start and move forward immediately when other gears start incorrectly. Therefore, be sure to confirm whether the shift lever is in P or N gear before starting the engine.
Cart starter engine
The car cannot start because the battery is short of power, and it is very wrong to start by pushing or dragging by other vehicles. Because the above method cannot transfer power to the engine, but will damage the three-way catalytic converter.
