Linear solenoid valve control device
US6874525B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2004 |
| Grant date | Apr 5, 2005 |
| Priority date | — |
| Expiry date | Aug 6, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/4358
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Disclosed is a control device for controlling a two-way linear solenoid valve (60) including a pressure regulating port (60p) which communicates with a hydraulic circuit side, a drain port (60d) which communicates with a drain side, a plunger (61) which controls the state of communication between the pressure regulating port and drain port, and a coil (70) which drives the plunger in accordance with an exciting current. The control device has a current generator (65) which supplies the coil with the exciting current corresponding to a duty signal; and a microcomputer (1). The microcomputer determines whether or not a preset foreign matter removal starting condition for removing foreign matter accumulated in the ports has been established. When the foreign matter removal starting condition is established, the microcomputer sets a variation pattern for a current command value in the form of a rectangular wave having a preset maximum current command value (A1) and a preset minimum current command value (A0), and transmit to the current generator a first duty signal corresponding to the maximum current command value and a second duty signal corresponding to the minimum current command …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.