Hjs Emission Technology Gmbh & Co. Kg

Thomas Kästner

Klaus Schrewe

Frank Noack

Bettina Baier

Aomar Khibit

A device for supplying a chemical reactant into the exhaust system of an internal combustion engine, comprising: a mixer housing; a metering pipe passing through the mixer housing, towards which the exhaust flow flowing into the mixer housing flows in a transverse direction, and having a first end and a second end; a metering unit arranged at the first end of the metering pipe and connected to a reactant supply for discharging reactant into the metering pipe; and means for generating a swirl flow of the exhaust flow within the metering pipe. The metering pipe has at least one inflow opening extending over a casing surface segment of no less than 45&#xb0; in the circumferential direction and extending over at least one section of the length of the metering pipe, said inflow opening having a shovel-like hood arranged on the metering pipe and directing the exhaust flow eccentrically into the inflow opening.

Device to convey a chemical reactant into the exhaust gas stream of a combustion engine

A heating module () for an exhaust-gas purification system connected to the outlet of an internal combustion engine comprises a catalytic burner, with an HC injector () and with an oxidation catalytic converter () positioned downstream of the HC injector () in the flow direction of the exhaust gas, for supplying thermal energy to an exhaust-gas purification unit of the exhaust-gas purification system. It is provided here that the heating module () has a main section (), a secondary section () which comprises the catalytic burner (), and a device () for controlling the exhaust-gas mass flow flowing through the secondary section (). In a first embodiment, the main section () has, in the inlet region or the heating module (), an overflow pipe portion () which has overflow openings (), between which overflow diverting chambers () is situated, parallel to the main section () of the heating module (), the secondary section portion () with the oxidation catalytic converter (). In another embodiment, it is provided that the secondary section () has, at the inlet side and outlet side, in each case one diverting chamber () which extends in the radial direction from the main section (), between which diverting chambers () is situated, parallel to the main section () of the heating module (), the secondary section portion () with the oxidation catalytic converter ().

Growing community of inventors

Menden, Germany

Thomas Kästner