Electro-magnetic actuator for torque coupling with variable pressure-control spool valve
US7353927B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 2005 |
| Grant date | Apr 8, 2008 |
| Priority date | — |
| Expiry date | May 9, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2071
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A torque-coupling assembly comprises a rotatable torque-coupling case, a friction clutch assembly for selectively engaging the torque-coupling case and an output shaft, a hydraulic pump for generating a hydraulic fluid pressure, a fluid control passage through which a hydraulic fluid is discharged from the torque-coupling case, and a variable pressure-control valve assembly to selectively control the clutch assembly. The variable pressure-control valve assembly includes a spool valve disposed in the fluid control passage and an electro-magnetic actuator. The electro-magnetic actuator is provided for producing a variable axial electro-magnetic force acting to the spool valve so as to selectively adjust a position of the spool valve in the fluid control passage in order to selectively control a flow rate of the hydraulic fluid in the fluid control passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.