Aftertreatment system
AssigneeVolvo Truck Corporation
InventorsBjörn Henriksson, Sebastian Pelto-Piri, Mikael Forsberg
Life of this patent
Estimating the term…
Abstract
An aftertreatment system connected downstream an internal combustion engine arrangement for receiving exhaust gases conveyed from the internal combustion engine arrangement during operation thereof, wherein the aftertreatment system comprises first and second catalytic devices in series, wherein a gap is there between.
Claims13
A method for controlling an aftertreatment system connected downstream an internal combustion engine arrangement for receiving exhaust gases conveyed from the internal combustion engine arrangement during operation thereof, the aftertreatment system comprising a catalytic reduction arrangement comprising a first catalytic device and a second catalytic device, wherein the first and second catalytic devices are arranged in series with each other, wherein a geometric gap is present between an outlet of the first catalytic device and an inlet of the second catalytic device, the method comprising:
- determining a flow velocity of the exhaust gases conveyed from the internal combustion engine arrangement;
- comparing the flow velocity with a predetermined threshold value;
- and
- controlling the exhaust gases to by-pass the first catalytic device and enter an inlet of the second catalytic device at the geometric gap between the first and second catalytic devices if the flow velocity is lower than the predetermined threshold value.
Dependencies are inferred from the claim text.