Urea common rail

US9222388B2 · kind B2 · utility

Assignee

• Tenneco Automotive Operating Company LLC · US

Inventors

• Dana Kregling · Battle Creek, US
• Michael Golin · Dexter, US
• Guanyu Zheng · Farmington, US
• Alan Brockman · Ann Arbor, US
• Adam J. Kotrba · Laingsburg, US
• Timothy P. Gardner · Canton, US
• Andrey Factor · Farmington Hills, US

Key dates

• Filing date: Feb 28, 2013
• Grant date: Dec 29, 2015
• Expiry date: Mar 26, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/2541
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

An exhaust system including a selective catalytic reduction (SCR) component and an oxidation catalyst component. The exhaust system also includes an exhaust treatment fluid injection system for dispersing an exhaust treatment fluid into an exhaust stream at a location adjacent either the SCR component or the oxidation catalyst component, wherein the exhaust treatment fluid injection device includes a common rail that provides the exhaust treatment fluid under pressure to a plurality of injectors that dose the exhaust treatment fluid into the exhaust stream. The exhaust treatment fluid injection device also includes a return rail for returning unused exhaust treatment fluid to the fluid source. Each of the common rail and return rail can be configured to allow drainage of the exhaust treatment fluid as a freeze-protection feature.