| 摘要 |
A mixer 1 for an exhaust gas aftertreatment system of an internal combustion engine. The mixer comprises a body portion 2 provided with a plurality of movable blades 3, and a blade positioning device 5 to move one or more blades with respect to the body portion. The blades may be moveable between deployed and folded positions. The blade positioning device may comprise an actuator 6 and an actuation arm 6a coupled to the blades. A connecting element 7 may connect two or more blades such that they are moved concurrently. The body portion may comprise a circular outer frame with a central axis Y, which the blades may extend radially with respect to. The body portion may instead comprise a quadrangular outer frame. The mixer may be in an exhaust system with an upstream injector (e.g. urea) and a downstream aftertreatment device (e.g. a selective catalytic reduction, SCR, device). A method of operating the system is also disclosed. |
