Hydrostatic self-regulating drive system
US4596118A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1984 |
| Grant date | Jun 24, 1986 |
| Priority date | — |
| Expiry date | Nov 30, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W10/103
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydrostatic drive system has an internal combustion engine, a main pump driven by the engine and having a control element displaceable to vary the pump displacement, a control pump driven by the engine, an output motor having a control element displaceable to vary the motor displacement and having a rotary output, and conduits interconnecting the main pump and output motor for driving of the motor by the pump. A speed-measuring pump is connected to the motor output and produces a pressure differential corresponding to the speed of the motor output. A pump controller is powered by the control pump and connected to the pump control element for adjusting the pump displacement. A motor controller is connected to the motor control element for adjusting the motor displacement. An engine controller includes a first engine cylinder connected to the speed-measuring motor and operable thereby for adjusting the engine speed and a second engine cylinder connected to the control pump and operable thereby for affecting engine speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.