Supplemental control valve device for supplemental flow control of an internal combustion engine intake channel

A supplemental control valve device for supplementally controlling the flow through the intake channel of an internal combustion engine, the intake channel having an upstream cross section, an enlarged cross section downstream of the upstream cross section at which the cross section of the intake channel enlarges from its upstream cross section to a cross section greater than the upstream cross section, and a reducing cross section downstream of the enlarged cross section along which the cross section of the intake channel reduces from the enlarged cross section to a lesser cross section, the supplemental control valve device comprising:

• a flow body mounted in the intake channel and extending from the enlarged cross section of the intake channel into the reducing cross section of the intake channel, the flow body being configured in correspondence with the intake channel such that an annular gap is formed between the flow body and the intake channel;
• and
• a valve member supported on the flow body for movement between an open position in which the valve member is at a spacing from a valve seat on the intake channel at the transition of the upstream cross section and the enlarged cross section and forms the upstreammost portion of the flow body against which the flow in the intake channel flows before the flow passes through the annular gap, and a closed position in which the valve member is seated against the valve seat such that flow in the intake channel past the valve member is substantially prevented, the flow body being correspondingly configured relative to the intake channel such that the contour of the annular gap extends in the flow direction in a non-step manner without any abrupt change and the valve member and the flow body being configured in correspondence with one another such that, in a position in which the valve member permits the maximum flow therepast, the valve member seats against the flow body in a substantially flush manner.