Patent ID: 9650029
Date: 2017-05-16
CPC Classifications: B60T,Y10T

Claim:
1. A compressed air supply system for a utility vehicle, comprising: an air dryer unit comprising a filter unit having a compressed air supply flow direction; an electrically activatable valve unit configured to supply a regeneration air flow through the electrically activatable valve unit to the filter unit in a direction opposite the compressed air supply flow direction; a compressor having a coupling, said compressor supplying compressed air to the air dryer unit via a feed line; a multi-circuit protective valve unit operatively configured to draw compressed air from the air dryer unit; an electrically activatable compressor coupling switching valve unit; a blow-off line branching off from the feed line upstream of the filter unit and connecting the feed line to a pneumatically activatable blow-off valve unit for discharging compressed air from the feed line; an electronic control unit operatively configured to control functions of the air dryer unit and the electrically activatable compressor coupling switching valve unit; a shut-off valve unit arranged in the feed line downstream of the compressor and upstream of the blow-off line, wherein the shut-off valve unit is operable to shut off compressed air flow from the compressor through the feed line while maintaining pressure in a portion of the feed line between the compressor and the shut-off valve unit; and a further electrically activatable valve unit arranged to control flow of compressed air for pneumatically activating the feed line shut-off valve unit.