Selective catalytic reduction warmup system
View Patent ↗An engine and after treatment system comprising an engine with an exhaust line engaged to upstream after treatment components, the upstream after treatment components engaged to a selective catalytic reduction converter, a means for bypassing the upstream after treatment components to allow engine exhausts to warm a catalyst within the selective catalytic reduction converter. One version allows indirect warming of the catalyst by providing a pathway for engine exhausts thru a warming cavity located on an outer region of the selective catalytic converter and then back thru the upstream after treatment components.
1. A selective catalytic reduction converter, comprising:
a selective catalytic reduction catalyst;
the catalyst being within a container such that there is a pathway for exhausts directed to a first end of the container to pass through the catalyst and then exit through a second end of the container;
the catalyst being within an inner wall of the container;
an outer wall spaced radially outwards of the inner wall of the container to form a warming cavity;
a connection line from a downstream side engaged to the warming cavity;
a connection line from an upstream side engaged to the warming cavity on a side opposite of the connection line from a downstream side; and
a flow path between the connection line from the upstream side and the connection line from the downstream side such that a gas is directed through the warming cavity, allowing the gas to provide warming to the catalyst within the container.
2. The selective catalytic reduction converter as set forth in claim 1 , wherein the container is cylindrically shaped container such that exhausts from the components upstream are directed to a first end of the container passing through the catalyst and then exiting through a second end of the SCR container.