Back to results
US 2016/0222890 A1Published application
Method of controlling aspirator motive flow
AssigneeFord Global Technologies, LLC
InventorsEric Luehrsen, Ross Dykstra Pursifull
Life of this patent
Estimating the term…
Abstract
Systems and methods are described for controlling an aspirator control valve in an engine. An example method comprises closing the aspirator control valve responsive to diagnosing a first engine degradation condition and opening the aspirator control valve in response to diagnosing a second engine degradation condition.
Claims20
A method for an engine, comprising:
- closing an aspirator control valve (ACV) responsive to diagnosing a first engine degradation condition;
- and
- opening the ACV in response to diagnosing a second engine degradation condition, the second engine degradation condition being distinct from the first engine degradation condition.
A system for an engine, comprising:
- an engine intake manifold;
- an intake throttle coupled in an intake passage;
- an aspirator coupled in a bypass air intake passage across the intake throttle;
- an aspirator control valve, positioned downstream of the aspirator in the bypass air intake passage, regulating motive flow through each of the aspirator and the bypass air intake passage;
- a motive inlet of the aspirator coupled to the intake passage upstream of the intake throttle;
- a motive outlet of the aspirator coupled to the intake passage downstream of the intake throttle;
- and
- a controller with instructions in non-transitory memory and executable by a processor for:
- responsive to an indication of a first engine degradation condition,
- closing the aspirator control valve;
- and
- discontinuing generation of vacuum via the aspirator.
9 more elements
A method for an engine, comprising:
- opening an aspirator shut-off valve in response to diagnosing an engine degradation condition, the engine degradation condition including a decrease in intake manifold vacuum level below a threshold vacuum level.
Dependencies are inferred from the claim text.