Hydrostatic steering system having improved steering sensing
US6539710B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 9, 2001 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | Feb 9, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D15/02
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hydrostatic steering system of the type including a fluid controller (21) for controlling the flow of fluid from a source (11) to a steering actuator (19) in response to movement of a steering wheel (W). The controller (21) is of the type having a fluid meter (65) including a moveable star member (95), the movement of which corresponds to the flow of fluid to the actuator (19). The controller includes a sensor assembly (125) which senses the movement of the star member (95) and generates an electrical signal (127) representative of the fluid flow through the fluid meter (65). This signal (127) is compared by the vehicle microprocessor (25) to a steered wheel position signal (107), and a command signal (111,113,115) representative of the “error” is generated and transmitted to a valve assembly (23) which communicates compensation fluid into or out of the circuit connected to the steering actuator (19) to try to null the difference between the movement of the fluid meter (65) and that of the steered wheels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.