Automatic four-wheel drive transfer case
US4298085A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1979 |
| Grant date | Nov 3, 1981 |
| Priority date | — |
| Expiry date | Nov 15, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H37/0813
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An automatic four-wheel drive transfer case according to this invention comprises a differential gear connected to the output shaft of a transmission, said differential gear having first and second side gears and a casing, a clutch arranged coaxially with the output shaft for releasably engaging the casing of the differential gear with the side gears thereof, the first side gear being connected with a rearwheel drive output shaft which is arranged on the extension of the output shaft of the transmission, the second side gear being connected with an intermediate shaft arranged coaxially with the output shaft of the transmission, a selective gearing for selectively engaging the second side gear with a front-wheel drive output shaft to change over between two-wheel drive and four-wheel drive, and a clutch control which receives a signal indicating the position of the selective gearing and signals representing the revolution speed of the front-wheel drive output shaft and/or the rear-wheel drive output shaft so as to selectively control the operation of the clutch, whereby the clutch control engages the clutch in two-wheel drive, and in four-wheel drive it engages the clutch when the v…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.