Reductant delivery unit for selective catalytic reduction

US8024922B2 · kind B2 · utility

Assignee

• Continental Automotive Systems Inc. · US

Inventors

• Willem Nicolaas Van Vuuren · Williamsburg, US
• Stephen C. Bugos · Newport News, US
• William J. Imoehl · Williamsburg, US
• Michael J. Hornby · Williamsburg, US
• Ray Wildeson · Yorktown, US
• Olaf Graupner · Neutraubling, DE
• David R. Cole · Brier, US

Key dates

• Filing date: Mar 28, 2008
• Grant date: Sep 27, 2011
• Expiry date: Feb 5, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7886
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A reductant delivery unit (10) is provided for selective catalytic reduction (SCR) after-treatment for vehicles. The unit includes a solenoid fluid injector (10) constructed and arranged to be associated with an exhaust gas flow path (14) upstream of a SCR catalytic converter (17). The fluid injector has a fluid inlet (13) and a fluid outlet (15) with the fluid inlet being constructed and arranged to receive a source of urea solution and the fluid outlet being constructed and arranged to communicate directly with the exhaust flow path so as to control injection of urea solution into the exhaust gas flow path. An interface (24) is constructed and arranged to couple the fluid injector to the gas flow path. The interface defines a thermal barrier constructed and arranged to decoupled a body of the injector from exposure to heat in the exhaust gas flow path.