Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Bendix Commercial Vehicle Systems LLC

Knorr-Bremse Systeme Fur Nutzfahrzeuge Gmbh

Jean-Baptiste Marescot

David D Colavincenzo

Gilles Hebrard

Joerg Mellar

Royal Ricky Rodrigues

Jean-Louis Mezza

Frederic Amiot

Arnaud Chazelles

Bertrand Chirot

Jessica H Mosier

Michel Saintive

Jörg Mellar

Oliver Maupas

Daniel Grindel

Guillaume Champon

Laurent Seurin

A piston assembly for an unloader valve of an air compressor includes an unloader piston having an end portion with a first bore of a first bore diameter, an intermediate portion with a second bore of a second bore diameter and an opposite end portion with a third bore of a third bore diameter; a coil spring having a central opening, one end portion disposed in the second bore of the unloader piston and an opposite end portion extending into the first bore of the unloader piston; and a balance piston including a head portion having a diameter to be disposed in the first bore of the unloader piston, and a stem portion extending from the head portion into the central opening of the coil spring and having a diameter smaller than the diameter of the head portion. The diameter of the stem portion at an end portion facing away from the head portion substantially corresponds to an inner diameter of the central opening of the coil spring. The balance piston includes a heat protection element.

Piston assembly for an unloader valve of an air compressor

An apparatus is provided for controlling a vehicle air compressor having compressor oil to track water content in the compressor oil due to condensation during operation of the compressor over a plurality of time intervals. The apparatus comprises a data storage unit arranged to store a condensation control algorithm. The apparatus also comprises a processing unit arranged to apply the condensation control algorithm to calculate a net rate of condensation of water in the compressor oil during operation of the compressor over a first time interval of the plurality of time intervals, and maintain a running total of how much water is in the compressor oil at any given time over the first time interval to enable the compressor to operate in different modes of operation based upon the running total of how much water is in the compressor oil.

Apparatus and method for controlling a vehicle air compressor to track water content in compressor oil

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Manerbe, France

Jean-Baptiste Marescot