Patent ID: 9719393
Date: 2017-08-01
CPC Classifications: F01N,Y02T

Claim:
1. An exhaust system for a dual-fuel engine that is provided with a first fuel and a different second fuel for combustion, comprising: an exhaust passageway; an exhaust treatment component provided in the exhaust passageway, the exhaust treatment component being configured to treat exhaust from combustion of the second fuel and not from combustion of the first fuel; a thermal enhancement device in communication with the exhaust passageway and located upstream from the exhaust treatment component; and a controller configured to activate and deactivate 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, wherein the thermal enhancement device increases a 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.