Full-time transfer case with synchronized layshaft-type range shift arrangement
US5697861A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 1996 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Feb 13, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2063/3056
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A power transfer system is disclosed for a four-wheel drive vehicle operable for permitting a vehicle operator to select between various full-time and part-time four-wheel drive modes. The power transfer system includes a layshaft gear reduction unit that is operable for establishing high-range and low-range speed ratios, and a synchronized range shift mechanism that is adapted to permit the vehicle operator to shift on-the-fly for establishing full-time and part-time high-range and low-range four-wheel drive modes. The power transfer system includes an electronically-controlled slip limiting/torque-biasing arrangement including an interaxle differential and a transfer clutch operable for controlling the magnitude of speed differentiation and torque biasing across the interaxle differential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.