Robert James Applegate

US Patent:

20150267584, Sep 24, 2015

Filed:

Jun 8, 2015

Appl. No.:

14/732833

Inventors:

- Lake Forest IL, US
Adam J. Kotrba - Laingsburg MI, US
Robert Applegate - Linden MI, US

International Classification:

F01N 3/20

Abstract:

An exhaust system for a dual-fuel engine includes an exhaust treatment component in an exhaust passageway. The exhaust treatment component is configured to treat exhaust from the combustion of a second fuel and not from combustion of a first fuel. A thermal enhancement device is in communication with the exhaust passageway and positioned upstream from the exhaust treatment component. A controller activates and deactivates the thermal enhancement device based on switching from the first fuel to the second fuel, wherein the first fuel has a higher sulfur content than the second fuel. The thermal enhancement device increases the temperature of an exhaust to combust a residual amount of the first fuel present in the exhaust passageway during the switch between the first fuel and the second fuel.

US Patent:

20140260192, Sep 18, 2014

Filed:

Mar 14, 2013

Appl. No.:

13/804027

Inventors:

- Lake Forest IL, US
Adam J. Kotrba - Laingsburg MI, US
Robert Applegate - Linden MI, US

International Classification:

F01N 3/20

US Classification:

60274, 60320, 60301, 60288

Abstract:

Exhaust system for a dual-fuel engine that is provided with a first fuel and a second fuel. The exhaust system includes an exhaust passageway, with an exhaust treatment component provided in the exhaust passageway. A thermal enhancement device communicates with the exhaust passageway and is located upstream from the exhaust treatment component, wherein the thermal enhancement device is operable to raise a temperature of an exhaust located in the exhaust passageway during a switch between the first fuel and the second fuel that is provided to the dual-fuel engine. The exhaust treatment system can also include a by-pass pipe in communication with the exhaust passageway that by-passes the exhaust treatment component, wherein during combustion of the first fuel by the dual-fuel engine, the by-pass pipe is open. During combustion of the second fuel by the dual-fuel engine, the by-pass pipe is closed.