Low-cost evacuator for an engine having tuned Venturi gaps

US10273978B2 · kind B2 · utility

Assignee

• DAYCO IP HOLDINGS, LLC · US

Inventors

• David E. Fletcher · Flint, US
• Brian M. Graichen · Royal Oak, US
• James H. Miller · Ortonville, US
• Rex Bravo · Detroit, US
• Matthew C. Gilmer · South Lyon, US
• Keith Hampton · Ann Arbor, US
• Andrew Niedert · Farmington Hills, US
• Denis Vashuk · Saint Clair, US

Key dates

• Filing date: Aug 20, 2015
• Grant date: Apr 30, 2019
• Expiry date: Mar 5, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An evacuator for supplying vacuum to a device in a boosted engine air system is disclosed. The evacuator defines a body comprising a converging motive section, a diverging discharge section, at least one suction port, and a Venturi gap located between an outlet end of the converging motive section and an inlet end of the diverging discharge section. A lineal distance is measured between the outlet end and the inlet end. The lineal distance is decreased in length if higher suction vacuum at a specific set of operating conditions is required and the lineal distances is increased in length if higher suction flow rate at the specific set of operating conditions is required.