	US 12,078,258 B2
	Pneumatic valve apparatus for a compressed air device, and transmission-control or clutch system comprising the pneumatic valve apparatus
Stefan Knoke, Hannover (DE); Holger Spalek, Barsinghausen (DE); and Sebastian Westphal, Laatzen (DE)
Assigned to NASS MAGNET GMBH, Hannover (DE); and ZF CV SYSTEMS EUROPE BV, Brussels (BE)
Appl. No. 17/775,593
Filed by nass magnet GmbH, Hannover (DE); and ZF CV Systems Europe BV, Brussels (BE)
PCT Filed Nov. 3, 2020, PCT No. PCT/EP2020/080759 § 371(c)(1), (2) Date May 10, 2022, PCT Pub. No. WO2021/094128, PCT Pub. Date May 20, 2021.
Claims priority of application No. 10 2019 130 523.3 (DE), filed on Nov. 12, 2019.
Prior Publication US 2022/0390032 A1, Dec. 8, 2022
Int. Cl. F16K 27/02 (2006.01); B60T 13/68 (2006.01); B60T 15/54 (2006.01); B60T 17/00 (2006.01); F16K 31/06 (2006.01)

CPC F16K 27/029 (2013.01) [B60T 13/683 (2013.01); B60T 15/54 (2013.01); B60T 17/008 (2013.01); F16K 31/0627 (2013.01); Y10T 137/86622 (2015.04)]

23 Claims

1. A pneumatic valve apparatus for a compressed air device, comprising: a pneumatic solenoid valve comprising a housing body having a supply channel, a consumer channel and a vent channel, wherein the housing body surrounds a valve chamber, in which a valve body moves along a valve axis counter to the force of a valve spring by an actuator relative to a vent valve seat leading to the vent channel and relative to a supply valve seat leading to the supply channel, wherein in a first position, the valve body opens the valve chamber and the vent valve seat leading to the vent channel, and, in a second position, opens a the supply channel leading to the supply valve seat and the valve chamber, wherein the vent channel of the housing body comprises a diffuser, which adjoins the vent valve seat leading to the vent channel, wherein a cross section of a diffuser channel of the diffuser widens starting from a vent valve seat outlet of the vent valve seat to the vent channel, the diffuser channel runs transversely to the valve axis, and a vent valve seat passage has a first clearance width that is less than a second clearance width of the diffuser channel, and the diffuser channel has a first section of frustoconical configuration and/or has a second section of curved configuration.