Proportional solenoid valve control system
US5915667A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1996 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | Jan 4, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H47/325
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A proportional solenoid valve control system is applicable to hydraulic systems of heavy equipment, automatic transmission systems and furl injectors of vehicles. This system includes main circuitry which is composed of a switching element, a proportional solenoid valves, and a current detection resistor; and a control circuit which is composed of a current command detection circuit, a rectifier, an offset circuit, a current command adding and limiting circuit, an offset circuit, a current command adding and limiting circuit, a current detection circuit, an proportional integrator-controller, a pulse width modulation comparator, and an output circuit. In addition, the system, precisely controls the load currents flowing in the proportional solenoid valves according to the current commend.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.