⚙Differential

⚙Differential
When a car is going straight, the left and right wheels rotate at the same speed. Rotation rate is usually expressed in rpm (revolutions per minute). rpm tells you how many revolutions per minute.
At 500rpm, it is considered to be 500 revolutions per minute. Larger generators run at 1500rpm to produce a frequency of 50Hz. Excavator side panels work at 1800rpm.
The left and right wheels rotate at the same speed as the car is moving
When turning, the left and right wheels do not rotate at the same speed.
When turning left, the left wheel spins slowly and the right wheel spins fast.
When you turn right, the right wheel slows down and the left wheel spins fast. If both left and right wheels rotate at the same rpm, there is no way to turn. Due to this, it is not possible to connect the left and right wheels with the same shaft.


Let me give you an example of a rear-wheel-drive car. In the rear seat, the front wheel is not connected to the engine. The power of the engine is transmitted only to the rear wheels, so only the rear wheels are connected to the engine.
The other two wheels were also spinning at the same power as the engine when traveling in a straight line. It also struggles to get engine power while cornering.
There is no problem when going straight
When turning, the left and right wheels ...
1. You also have to rotate it at different rpm
2. The power of the engine must also be taken into account


Differential sales need to be used to do both at the same time.
မျိုးDifferential 3 functions
1. The left and right wheels are allowed to rotate at different rpm.
2. Engine power is transmitted to the left and right wheels.
3. It reduces the rpm of the wheel and increases the torque.

IffDifferential types
Differential is mainly
1. Open differential
2. Limited slip differential LSD
3. There are three types of torsen differential.

Other Diff types are based on Open and LSD.
The LSD can be further subdivided into Mechanical clutch, Electrical clutch, Viscous coupling.


There is also a more advanced torque vectoring differential. Used to give more torque to the left or right wheel when cornering.
The most common is Open differential. It is also called Standard differential because of its use. It is the cheapest and easiest to maintain.
Differential has already said that the left and right wheels separate the power from the engine. One of the disadvantages of open differential is that it can be released without touching the ground. If a wheel slips into a lake, it slips and falls. Power only on the slippery wheel and no power on the other wheel.
You may have seen one wheel fall into a puddle and one wheel on the road. In that case, the slippery wheel in the pond will spin and one of the wheels on the road will not spin.
In that case, if you have a differential lock, you can turn both the left and right wheels at the same rpm as soon as you lock them. If you do not have Diff Lock, you can use a board or plank to prevent slipping wheels. Whether it is brick or mortar. If you give it a block, the other wheel can roll out.


Just understanding Differential is enough without having to read on. For those who want to know more, I will explain about Center differential.
2-wheel drive 2WD Two-wheel drive cars only need one differential.
In 4WD cars, both front and rear wheels are connected to the engine. So one differential for the front two wheels. You will need a differential for the other two wheels.
In addition, the front and rear wheels rotate at different speeds when cornering. So the sales rate at the front is different from the sales at the back. In that case, the front and rear axles could not be connected directly to the engine. Center differential is needed to allow the front and rear wheels to rotate at different rpm.
Direct connection without center differential like part-time 4WD. Later it was sold at the same rpm. Then the front seller and the rear seller have to rotate at the same rpm, so it is impossible to turn every time you want to turn.

There is no reason to worry about slippery road surfaces. Therefore, part-time 4WD should not be turned on surface-coated concrete pavements but on slippery roads.
Full-time 4WD / AWDs have center differential so you can turn at any time. However, when the Center Differential Lock is set, both the front differential and the rear differential rotate at the same rpm, making it impossible to turn. To put it bluntly, you can make a forced turn. There will be a sound of tires rubbing against the road. Driveline components may hurt. Axle shaft is broken at the wrong time. Crankshaft gear can be eroded. If you need to use Diff Lock when the wheel is slippery, follow the steps below.

1. Center Diff Lock 2. Rear Diff Lock 3. Front Diff lock
Center Diff Lock and Rear Diff Lock are usually included. Cars with Front Diff Lock are rare. Thank you
Credit : Automotive Engineering Knowledge Myanmar (page)


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