Controlled two-speed axle shifting with automatic transmission
US6237712A · kind A · utility
4Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1999 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Mar 29, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/6823
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A circuit for the electrical system of an automotive vehicle, such as a truck, interfaces a two-speed axle selector switch (20) and a two-speed axle solenoid (18) with the vehicle ignition, or key, switch (12), the vehicle brake actuation switch (16), and the vehicle transmission neutral switch (14) to allow the axle to be shifted between its two speed ranges under certain conditions and to disallow such shifting under other conditions. The circuit includes a high range relay (22), a high range enable relay (24), a high range disable relay (26), and a low range relay (28).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.