US 12,241,435 B2
Exhaust gas recirculation valve assembly
Mark Jason Boswell, Corning, IA (US); and Timothy Garritt House, Urbandale, IA (US)
Assigned to Power Packer North America, Inc., Westfield, WI (US)
Filed by Power Packer North America, Inc., Westfield, WI (US)
Filed on Jan. 31, 2024, as Appl. No. 18/428,818.
Claims priority of provisional application 63/485,722, filed on Feb. 17, 2023.
Prior Publication US 2024/0280070 A1, Aug. 22, 2024
Int. Cl. F02M 26/72 (2016.01); F02M 26/67 (2016.01); F02M 26/74 (2016.01)
CPC F02M 26/67 (2016.02) [F02M 26/72 (2016.02); F02M 26/74 (2016.02)] 10 Claims
OG exemplary drawing
 
1. An exhaust gas recirculation valve assembly comprising:
a valve housing having a flow housing portion defining a flow passage extending therethrough and along a flow axis, a gear assembly housing portion coupled to the flow housing portion, and a shaft bore extending between the flow passage and the gear assembly housing portion;
a driven shaft positioned in the shaft bore and extending along a shaft axis generally transverse to the flow axis;
a shaft bearing disposed in the shaft bore and pivotably supporting the driven shaft;
a butterfly member coupled to the driven shaft for pivoting movement with the driven shaft about the shaft axis, the butterfly member being pivotable between a closed position, in which flow of gas through the flow passage is inhibited, and an open position;
an electronics housing coupled to the valve housing;
a printed circuit board supported in the electronics housing;
a drive pinion extending between the electronics housing and the gear assembly housing portion, the drive pinion being drivingly coupled to the driven shaft; and
a sealing assembly to inhibit flow of gas from the flow passage into the electronics housing, the sealing assembly including
a first seal positioned in the shaft bore and along the driven shaft to provide a seal between the driven shaft and the shaft bore, the first seal being disposed between the flow passage and the shaft bearing,
a second seal positioned in the shaft bore and along the driven shaft to provide a seal between the driven shaft and the shaft bore, the second seal being disposed between the shaft bearing and the electronics housing,
a plate engaged between the valve housing and the electronics housing, the plate defining an opening therethrough, the drive pinion extending through the opening into the gear assembly housing portion, and
a sealed bearing supported by the plate and pivotably supporting the drive pinion in the opening, the sealed bearing providing a seal between the drive pinion and the plate.