Engine PCV system with venturi nozzle for flow regulation
US7431023B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2007 |
| Grant date | Oct 7, 2008 |
| Priority date | — |
| Expiry date | Jan 23, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01M13/022
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A positive crankcase ventilation system for an internal combustion engine is disclosed. The system includes an engine having a cylinder air intake system connected to associated cylinders and a filtered air inlet to a crankcase for admitting air to mix with crankcase vapors. A throttle is disposed in the cylinder air intake system for controlling airflow to the associated cylinders. The system further includes a venturi nozzle having an inlet and an outlet. The venturi nozzle inlet is connected to the crankcase for receiving the mixture of filtered air and crankcase vapors. The venturi nozzle outlet is connected to the cylinder air intake system at a location subject to variable intake vacuum pressure between the throttle and the cylinders to allow the mixture of filtered air and crankcase vapors to be drawn into the inlet air passing to the cylinders downstream of the throttle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.