DEF thawing apparatus and method for diesel engine SCR systems

US11629624B1 · kind B1 · utility

Assignee

• International Engine Intellectual Property Company, LLC · US

Inventors

• Andrei Makartchouk · Hinsdale, US
• Joseph Domenico · Downers Grove, US
• Tallis Ingram · Glenview, US
• Steve Dickerson · Lake in the Hills, US
• Louis Maza · Plainfield, US
• Paul L. Berke · Chicago, US
• Vijayasarathy Subramanian · Winfield, US

Key dates

• Filing date: Mar 10, 2022
• Grant date: Apr 18, 2023
• Expiry date: Mar 10, 2042

Classification

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

Abstract

A Diesel Emissions Fluid (DEF) Thawing arrangement is provided for use with a vehicle having an engine, an Engine Control Module (ECM), an exhaust system, and an SCR catalytic device. A DEF injection system is connected to the exhaust system and to the ECM. A DEF tank is connected to the DEF injection system. An exhaust pipe branch is connected to the exhaust system. A heat exchanging apparatus is connected to the exhaust pipe branch and is configured to exchange heat from exhaust gas within the exhaust pipe branch to the DEF in the DEF tank. The heat exchanging apparatus may be an exhaust gas to DEF heat exchanger located at least partially within the DEF tank, or may be an exhaust gas to coolant heat exchanger connected to an engine coolant circuit and a coolant to DEF heat exchanger located at least partially within the DEF tank.