Method for controlling the operation of a compressor
AssigneeFord Global Technologies, LLC
InventorJon Dixon
Life of this patent
Estimating the term…
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.
Claims18
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 compressor operating time to generate a varied maximum permitted compressor outlet temperature;
- and controlling the operation of the compressor via a wastegate in response to the varied maximum permitted compressor outlet temperature 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 including non-transitory instructions stored in memory to control operation of at least the booster, wherein the electronic control unit includes instructions to vary a maximum permitted compressor outlet temperature based upon a function of compressor outlet temperature and operating time to generate a varied maximum permitted compressor outlet temperature and adjust an amount of boost pressure via a wastegate produced by the compressor in response to the varied maximum permitted compressor outlet temperature so that the maximum permitted compressor outlet temperature is not exceeded.
A method, comprising:
- responsive to an operator torque request that results in a boost pressure that raises a temperature of a compressor above a maximum compressor temperature, opening, via an actuator controlled according to instructions stored in memory of an electronic control unit, a wastegate to reduce boost pressure, the maximum compressor temperature set based on a determined age factor of the compressor, 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.