Oil collecting structure of blow-by gas recirculation system and oil collecting device having the structure
US7966997B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2007 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Jul 29, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01M2013/0488
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An oil return passage that is open at its upper end to a cam chamber and is open at its lower end to a crank chamber is formed to extend from a cylinder head to a cylinder block. A heat exchanger having a double-pipe structure is housed in the oil return passage. Lubricating oil fed from the cam chamber is passed through an oil-collection outer passage of the heat exchanger, and separated oil fed from a separator case of a PCV system is passed through an oil-collection inner passage of the heat exchanger, so that heat of the lubricating oil is imparted to the separated oil. Thus, water contained in the separated oil is evaporated, and the amount of water flowing into an oil pan can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.