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US 2012/0237367 A1Published application
Method and System for Providing Vacuum
AssigneeFord Global Technologies, LLC
InventorsRalph Wayne Cunningham, Moses Alexander Fridman, Todd Anthony Rumpsa, Mansour Beshay, Cliff Maki, Ross Dykstra Pursifull
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Abstract
A vacuum source arbitration system is disclosed. In one example, vacuum is supplied to a vacuum reservoir via an ejector during a first condition, and vacuum is supplied to the vacuum reservoir via an engine intake manifold during a second condition. The approach may provide a desired level of vacuum in a reservoir while reducing engine fuel consumption.
Claims20
A method for providing vacuum for a vehicle, comprising:
- directing air from a compressor to an ejector;
- and
- adjusting a flow rate of air from the compressor in response to a rate of vacuum consumption within a vacuum system.
A method for providing vacuum for a vehicle, comprising:
- directing air from a compressor to an ejector;
- adjusting a flow rate of air from the compressor in response to a rate of vacuum consumption within a vacuum system;
- and
- directing an output of the ejector to an air intake system of an engine.
1 more element
A vacuum system, comprising:
- an engine with an intake manifold;
- a turbocharger coupled to the engine and supplying air the intake manifold;
- a vacuum reservoir;
- an ejector in communication with the vacuum reservoir and the turbocharger;
- and
- a controller, the controller including instructions for,
- during a condition where a pressure of the intake manifold is greater than a vacuum reservoir pressure, reducing vacuum reservoir pressure via directing air from a compressor of the turbocharger to the ejector without directing air from the vacuum reservoir to the intake manifold;
- and
- during a condition where the pressure of the intake manifold is less than the vacuum reservoir pressure, reducing vacuum reservoir pressure via directing air from the vacuum reservoir to the intake manifold without directing air from the compressor to the ejector.
6 more elements
Dependencies are inferred from the claim text.