Pressure swirl flow injector with reduced flow variability and return flow

US8998114B2 · kind B2 · utility

Assignee

• Tenneco Automotive Operating Company LLC · US

Inventors

• Keith Olivier · Jackson, US
• Stephen M. Thomas · Laingsburg, US
• John Lowry

Key dates

• Filing date: Feb 9, 2011
• Grant date: Apr 7, 2015
• Expiry date: Sep 18, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A reagent injector with a cartridge design has a body with a reagent inlet, outlet, and a swirl chamber, which has an exit orifice that may be covered and uncovered by a solid, movable pintle. Reagent flows through the injector when the exit orifice is covered and uncovered to cool the injector. An insulator may be disposed between the injector body and a mounting flange connectable to an exhaust system. A flow path ensures cooling of an electromagnetic actuator. Reagent may bypass an orifice swirl chamber when the pintle blocks the exit orifice. Fluid may flow between an outside diameter of a pole piece and an inside diameter of an electromagnetic actuator, through an orifice chamber and return through a central bore housing a solid pintle, around which fluid may flow. Different inner injector body passages may direct fluid into an orifice distribution chamber and out to the solid pintle.