Power transmission system for a four-wheel drive vehicle
US4556134A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 27, 1983 |
| Grant date | Dec 3, 1985 |
| Priority date | — |
| Expiry date | Jan 27, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K17/34
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A system for a four-wheel drive vehicle automatically changes a two-wheel driving system to a four-wheel driving system in accordance with a slipping rate between the wheels. The system is provided with a pressure oil operated clutch for transmitting the power of the engine to auxiliary driving wheels. The clutch is engaged by pressure oil supplied by a pressure oil circuit including a solenoid operated valve. An electric circuit comprising a control device is provided for energizing the solenoid. The control device operates to close the electric circuit in dependency on the slipping rate to energize the solenoid. The energization of the solenoid causes the clutch to engage, so that four-wheel driving power transmission system is established. A manual switch is provided for opening the electric circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.