Pneumatic valve apparatus for a compressed air device, and transmission-control or clutch system comprising the pneumatic valve apparatus

A pneumatic solenoid valve for a compressed air device, comprising:

• a housing body defining a valve axis and a valve chamber in fluid communication with a supply channel, a consumer channel, and a vent channel, the valve chamber being in fluid communication with the vent channel via a vent valve seat passage and a diffuser channel of the vent channel adjoining the vent channel;
• a valve spring;
• and a valve body disposed in the valve chamber and moveable along the valve axis counter to the force of the valve spring from a first position to a second position relative to a vent valve seat disposed between the valve chamber and the valve seat passage, and relative to a supply valve seat disposed between the valve chamber and the supply channel, wherein:
• in the first position, the valve body opens the vent valve seat permitting fluid communication between the valve chamber and the vent channel via the vent valve seat passage and the diffuser channel, in the second position, the valve body opens the supply valve seat permitting fluid communication between the valve chamber and the supply channel, and the diffuser channel runs transversely to the valve axis from the vent valve seat outlet to the vent channel, and defines a cross section that widens starting from a first clearance width adjacent the vent valve seat outlet to a second clearance width adjacent the vent channel, and wherein the vent valve seat passage has a clearance width that is less than the second clearance width of the diffuser channel.

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 can be moved 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 a vent channel, and, in a second position, opens a supply channel leading to the supply valve seat and the valve chamber, wherein the housing body comprises a diffuser, which adjoins the vent valve seat leading to the vent channel, wherein the cross section of a diffuser channel of the diffuser widens 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 has a first radially aligned diffuser channel along a first diffuser angle and a second radially aligned diffuser channel along a second diffuser angle, the first and second diffuser channels being situated opposite one another and configured symmetrically relative to the valve axis.