Method of controlling an air compressor of a vehicle
AssigneeVolvo Truck Corporation
InventorsHugo Bebon, Pierig Gaillaud
Life of this patent
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Abstract
A method of controlling an air compressor of a vehicle. The absolute humidity is determined for atmospheric air entering the compressor as well as for the compressed air exiting the compressor. A liquid water mass formed or evaporated inside the compressor during a defined period of time is calculated. The above steps are repeated in order to calculate a cumulated liquid water mass inside the compressor. The compressor is stopped when the calculated cumulated liquid water mass has returned to zero and the control unit no longer receives a compressed air request.
Claims17
A method of controlling an air compressor of a vehicle, comprising:
- starting the compressor,
- at the time of starting the compressor:
- determining, for the atmospheric air entering the compressor, a value Habs,atm of the absolute humidity, and
- determining, for the compressed air exiting the compressor, a value Habs,comp of the absolute humidity,
- based on the determined values Habs,atm and Habs,comp, calculating by means of a control unit a liquid water mass formed or evaporated inside the compressor during a defined period of time,
- repeatedly performing the determining steps and the calculating step,
- for each repetition, calculating by means of the control unit a cumulated liquid water mass inside the compressor, and
- stopping the compressor when the calculated cumulated liquid water mass has returned to zero and the control unit no longer receives a compressed air request.
Dependencies are inferred from the claim text.