Dual path purge system for a turbocharged engine
US11225935B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2021 |
| Grant date | Jan 18, 2022 |
| Priority date | — |
| Expiry date | Jan 29, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M25/0809
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A dual path fuel vapor purge system is disclosed for an engine having a turbocharger or a super. The purge system includes a canister configured to collect fuel vapor from a fuel tank. A canister purge valve is provided downstream from the canister. An ejector valve receives fuel vapors from the canister through the canister purge valve. A first vapor purge path directs the fuel vapor to an intake manifold of the engine. A second vapor purge path directs fuel vapor to an air induction system. A check valve downstream from the ejector valve receives the fuel vapor from the ejector and supplies the fuel vapor to the air induction system. Boost flow opens the check valve when the air induction system is in operation to boost the engine and closes the check valve when the engine is in operation with normal aspiration or when a leak is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.