Method for controlling the operation of a compressor
AssigneeFord Global Technologies, LLC
InventorJon Dixon
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Abstract
A method for controlling a compressor of a turbocharger is disclosed. In one example, the method comprises varying a maximum permitted compressor outlet temperature based upon a function of compressor outlet temperature and operating time, and controlling the operation of the compressor so that the maximum permitted compressor outlet temperature is not exceeded. In this way a higher boost pressure can safely be used during the early life of the compressor but excessive coking of the compressor with a resultant loss of efficiency later in the life of the compressor is reduced.
Claims20
A method for controlling operation of a compressor arranged to supply boosted air to an engine, comprising:
- varying a maximum permitted compressor outlet temperature based upon a function of compressor outlet temperature and operating time;
- and
- controlling the operation of the compressor so that the maximum permitted compressor outlet temperature is not exceeded.
A boosted engine system, comprising:
- an internal combustion engine;
- a booster having a compressor to supply boosted air to the engine;
- and
- an electronic control unit to control operation of at least the booster, wherein the electronic control unit varies a maximum permitted compressor outlet temperature based upon a function of compressor outlet temperature and operating time and controls the operation of the compressor so that the maximum permitted compressor outlet temperature is not exceeded.
An engine method, comprising:
- adjusting a turbocharger wastegate in response to a determined age factor of a compressor of the turbocharger, the determined age factor a function of an amount of time the compressor operates at temperatures above a threshold.
Dependencies are inferred from the claim text.