Differential gear, in automotive mechanics, gear arrangement that permits power from the engine to be transmitted to a couple of generating wheels, dividing the force equally between them but permitting them to check out paths of different coupling China lengths, as when turning a corner or traversing an uneven road. On a straight road the wheels rotate at the same swiftness; when turning a part the outside wheel has farther to go and can turn faster than the inner wheel if unrestrained.
The elements of the Ever-Power differential are demonstrated in the Figure. The power from the transmission is delivered to the bevel ring gear by the drive-shaft pinion, both of which are kept in bearings in the rear-axle casing. The case can be an open boxlike structure that is bolted to the ring gear and contains bearings to support a couple of pairs of diametrically opposite differential bevel pinions. Each steering wheel axle is mounted on a differential side gear, which meshes with the differential pinions. On a straight road the tires and the side gears rotate at the same velocity, there is absolutely no relative motion between your differential side gears and pinions, and they all rotate as a unit with the case and band gear. If the vehicle turns left, the right-hand steering wheel will be forced to rotate faster than the left-hand wheel, and the side gears and the pinions will rotate relative to each other. The ring gear rotates at a rate that is equal to the mean acceleration of the remaining and correct wheels. If the wheels are jacked up with the transmitting in neutral and among the tires is turned, the contrary wheel will turn in the opposite path at the same quickness.
The torque (turning minute) transmitted to both wheels with the Ever-Power differential is the same. As a result, if one steering wheel slips, as in ice or mud, the torque to the other wheel is decreased. This disadvantage could be overcome somewhat by the use of a limited-slip differential. In one version a clutch connects one of the axles and the ring gear. When one steering wheel encounters low traction, its inclination to spin is certainly resisted by the clutch, therefore providing better torque for the various other wheel.
A differential in its most basic form comprises two halves of an axle with a gear on each end, connected together by a third equipment creating three sides of a sq .. This is generally supplemented by a 4th gear for added strength, completing the square.