Differential gear, in automotive mechanics, gear arrangement that permits power from the engine to be transmitted to a pair of traveling wheels, dividing the force equally between them but permitting them to check out paths of different 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 components of the Ever-Power differential are proven in the Figure. The energy from the transmitting is sent to the bevel band gear by the drive-shaft pinion, both which are held in bearings in the rear-axle housing. The case is an open boxlike framework that’s bolted to the band gear possesses bearings to support one or two pairs of diametrically reverse differential bevel pinions. Each wheel axle is mounted on a differential side equipment, which meshes with the differential pinions. On a directly road the wheels and the medial side gears rotate at the same acceleration, there is absolutely no relative motion between the differential part gears and pinions, plus they all rotate as a device with the case and ring gear. If the automobile turns to the left, the right-hand wheel will be required to rotate faster than the left-hand steering wheel, and the side gears and the pinions will rotate in accordance with one another. The ring equipment coupling China rotates at a swiftness that is add up to the mean quickness of the still left and right wheels. If the tires are jacked up with the transmission in neutral and one of the wheels is turned, the opposite wheel will submit the opposite path at the same velocity.

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 gear creating three sides of a sq .. This is generally supplemented by a 4th gear for added strength, completing the square.