Method and device for mixing compressed air and reducing agent and motor vehicle having the device

摘要

A device for providing a mixture of compressed air and liquid reducing agent includes a first inflow duct for reducing agent, a second inflow duct for compressed air, an outlet duct for the mixture, a mixing point at which compressed air and reducing agent are merged, and a mixing duct which adjoins the mixing point and which connects the mixing point and the outlet duct. The first inflow duct opens into the mixing point in an axial direction. The second inflow duct is connected to the mixing point through at least one injection duct. The at least one injection duct opens into the mixing point in a tangential direction. A method for mixing liquid reducing agent and compressed air to form a mixture and a motor vehicle having the device, are also provided.

主权项

1. A device for providing a mixture of compressed air and liquid reducing agent, the device comprising:
a first inflow duct for reducing agent; a second inflow duct for compressed air; an outlet duct for the mixture of compressed air and liquid reducing agent; a mixing point at which the compressed air and the reducing agent are merged; a mixing duct adjoining said mixing point and connecting said mixing point and said outlet duct; said first inflow duct opening into said mixing point in an axial direction; at least two injection ducts connecting said second inflow duct to said mixing point, said at least two injection ducts opening into said mixing point in a tangential direction in a circumferential segment; and a guide structure disposed between said at least two injection ducts, said guide structure being configured to deflect compressed-air flows entering into said mixing point through said injection ducts into a radial direction relative to a reducing agent flow.