# differential gear

Also found in: Dictionary, Thesaurus, Medical, Legal, Financial.

## differential gear

the epicyclic gear mounted in the driving axle of a road vehicle that permits one driving wheel to rotate faster than the other, as when cornering

## Differential Gear

a device that produces a resultant motion as the sum or difference of the component motions. In a differential gear with, one degree of freedom, the component motions are connected kinematically and are produced by a single drive; the resultant is produced as the difference of these motions. Differential gears with one degree of freedom are used for producing small, precise movements or great forces (for example, in instruments and metal-cutting lathes).

In differential gears with two or more degrees of freedom, the component motions are independent and each is performed by its own component element. There are a number of different types of such differential gears, but the most widely used is the differential gear with bevel gears (usually called simply a differential), which is used in motor vehicles and other transportation machines and in mechanical drives.

The relation between the effective velocities of the component elements of the differential gear is expressed by the formula ω1 + ω2 = 2ω or n1 + n2- 2nr, where ω1, ω2, and ωr and n1, n2nr are, respectively, the rates of angular motion and the frequencies of rotation of the central wheels and the carrier. In a speed regulator of the closed type, the differential gear permits broadening of the control range and makes possible reverse rotation of the driveshaft. In metal-cutting lathes the differential gear is used for simplifying tooling and reducing the number of change gears required. Differential gears are used in computers to perform the mathematical operation of parameter addition.

N. IA. NIBERG

## differential gear

[‚dif·ə′ren·chəl ′gir]
(control systems)
References in periodicals archive ?
Chapter Two Auto Differential Gear International and China Market Analysis
Chapter Three Auto Differential Gear Development Environmental Analysis
Chapter Four Auto Differential Gear Development Policy and Plan
Chapter Five Auto Differential Gear Manufacturing Process and Cost Structure
Chapter Six 2009-2014 Auto Differential Gear Productions Supply Sales Demand Market Status and Forecast
Chapter Seven Auto Differential Gear Key Manufacturers Analysis
Chapter Nine Auto Differential Gear Marketing Channels Analysis
Chapter Ten Auto Differential Gear Industry Development Trend
Chapter Eleven Auto Differential Gear Industry Development Proposals
Chapter Twelve Auto Differential Gear New Project Investment Feasibility Analysis
The rear axle system features AAM's PowerLite(TM) aluminum carrier and PowerDense(TM) hypoid and net shaped differential gears, as well as disc brakes, multi-link rear suspension design and a helical gear limited slip differential.
The differential gears have net forged teeth, which save the customer on costly secondary machining operations.

Site: Follow: Share:
Open / Close