Electro-hydraulic steering system
US5489005A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 1994 |
| Grant date | Feb 6, 1996 |
| Priority date | — |
| Expiry date | Nov 23, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D12/00
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In machines that are articulated in response to a steer input mechanism, it is many times necessary for the operator to make a steer input and then to make corrective adjustments in order to obtain the desired steer angle of the machine. In the subject invention, an electro-hydraulic steering system is provided which senses the desired steer input by the operator, senses the degree of articulation of the machine and a microprocessor delivers an electrical control signal (P) to an electro-hydraulic valve mechanism which effectively controls articulation of the machine. Once the machine has reached the degree of articulation desired by the operator, the microprocessor signals the electro-hydraulic valve mechanism to stop articulation of the machine. Consequently, the operator does not have to provide any adjustments thereto. Additionally, the ground speed of the machine is sensed and the rate of articulation is controlled in response thereto. In the subject arrangement, in the event of an electrical system failure, a back-up steering control circuit is automatically functional to control steering of the machine in a conventional manner. This arrangement provides an electro-hydraulic …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.