Viscous coolant heater with variable coolant pump drive
US8464963B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2008 |
| Grant date | Jun 18, 2013 |
| Priority date | — |
| Expiry date | Oct 17, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2500/5041
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A system for supplying supplemental heat to a vehicle, particularly a vehicle with a diesel engine, A driven viscous plate with different viscous clutch faces on either side is provided between the engine and the coolant pump. One side clutches to the engine structure (ground) to generate heat, and the other side clutches to the coolant pump to vary the pump drive. The two sides are controlled by a valve operated by signals from the engine computer. The valve varies the supply of viscous fluid from a common reservoir independently to both sides of the driven viscous plate. The signal from the engine control unit is based on the instantaneous desired supplemental heat and coolant flow. In another embodiment, two separate viscous clutches are utilized and positioned on opposite sides of the coolant pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.