LSD - kreok kreok...apa la bunyi hang nya driveshaft/gearbox nih bila kona?????

Kepada kawan2/sedara mara,

penerangan kat bawah nih harap dpt jawap persoalan hampa pasai LSD dan why gearbox aku bunyi pelik bila layan corner slow2...ini adalah disebabkan LSD aku!!!!

Ok?

Limited slip differential

Cone Type LSD

A limited slip differential (LSD) is a modified or derived type of differential gear arrangement that allows for some difference in angular velocity of the output shafts, but imposes a mechanical bound on the disparity. In an automobile, such limited slip differentials are sometimes used in place of a standard differential, where they convey certain dynamic advantages, at the expense of greater complexity.

Benefits

The main advantage of a limited slip differential is shown by considering the case of a standard (or "open") differential where one wheel has no contact with the ground at all. In such a case, the contacting wheel will remain stationary, and the non-contacting wheel will rotate freely—the torque transmitted will be equal at both wheels, but will not exceed the threshold of torque needed to move the vehicle, and thus the vehicle will remain stationary. In everyday use on typical roads, such a situation is very unlikely, and so a normal differential suffices. For more demanding use, such as driving in mud, off-road, or for high performance vehicles, such a state of affairs is undesirable, and the LSD can be employed to deal with it. By limiting the angular velocity difference between a pair of driven wheels, useful torque can be transmitted as long as there is some traction available on at least one of the wheels.

Type of LSD

One way L.S.D. specially suited for front wheel drive cars and 4WD car front axles.

Activates under acceleration, and acts as a true LSD when the throttle is off. A great chance for improved lap times.

1.5 way LSD
Activates under acceleration while the understeer is less than on the 2 way LSD.Recommended for drivers having difficulty with 2 way LSD understeer and one way LSD braking.

Two way LSD
Recommended on the rear axle for rear drive cars. Activates on both acceleration and deceleration. Recommended for those who
prefer hot driving action and big angle drift.

Normal differential (open differential)

February 23rd, 2009 | Category: Basic Knowledge | Leave a comment

The differential is a device that splits the engine torque two ways, allowing each output to spin at a different speed.

Car wheels spin at different speeds, especially when turning. Each wheel travels a different distance through the turn, and that the inside wheels travel a shorter distance than the outside wheels. Since speed is equal to the distance traveled divided by the time it takes to go that distance, the wheels that travel a shorter distance travel at a lower speed. Also note that the front wheels travel a different distance than the rear wheels

For the non-driven wheels on your car — the back wheels on a front-wheel drive car — this is not an issue. There is no connection between them, so they spin independently. But the driven wheels are linked together so that a single engine and transmission can turn both wheels. If your car did not have a differential, the wheels would have to be locked together, forced to spin at the same speed. This would make turning difficult and hard on your car.

Driving straight line:
Both drive wheels are spinning at the same speed. The input pinion is turning the ring gear and cage, and none of the pinions within the cage are rotating — both side gears are effectively locked to the cage.

Turning into corner:
When a car makes a turn, the wheels must spin at different speeds. The pinions in the cage start to spin as the car begins to turn, allowing the wheels to move at different speeds. The inside wheel spins slower than the cage, while the outside wheel spins faster.

Disadvantage of open differential
Remember, the open differential always applies the same torque to both wheels. If one of the driven wheels lifts off the ground, they will just spin helplessly in the air, and you won’t be able to move at all.

Because the weakness of the open differential, engineers have redesigned the differential use various mechanisms to allow normal differential action when going around turns. When a wheel slips, they allow more torque to be transferred to the non-slipping wheel. This type of differential called Limited Slip Differential (LSD).