Vacuum system for an engine
AssigneeFord Global Technologies, LLC
InventorsJoseph Norman Ulrey, Ross Dykstra Pursifull
Life of this patent
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Abstract
Systems and methods for generating a vacuum in an engine are provided. The system includes a first throttle upstream from a plurality of cylinders and a second throttle upstream from one of the cylinders. The system further includes a vacuum reservoir in fluidic communication with an intake runner downstream from the second throttle; a vacuum consumer in fluidic communication with the vacuum reservoir, the vacuum consumer controlled by an actuator; and a pneumatic actuator driven by a pressure state of the vacuum reservoir to adjust the second throttle.
Claims20
An engine comprising:
- a first throttle upstream from a plurality of cylinders;
- a second throttle upstream from one of the cylinders;
- a vacuum reservoir in fluidic communication with an intake runner downstream from the second throttle;
- a brake booster in fluidic communication with the vacuum reservoir, the brake booster controlled by an actuator;
- and
- a pneumatic actuator driven by a pressure state of the vacuum reservoir to adjust the second throttle.
A method for an engine comprising:
- throttling all engine cylinders with a main throttle;
- throttling less than all engine cylinders with a port throttle to generate a vacuum downstream from the port throttle;
- actuating the port throttle via the vacuum;
- capturing the vacuum and storing it within a vacuum reservoir;
- and
- supplying the stored vacuum to a brake booster mechanically actuating a hydraulic actuator for intensifying a braking force.
A method for an engine comprising:
- directly injecting fuel to a plurality of cylinders;
- regulating an airflow to the plurality of cylinders with a first throttle;
- adjusting the airflow to only a particular cylinder with a second throttle downstream from the first throttle only in a port of the particular cylinder;
- and
- supplying the particular cylinder with air from an intake manifold or with air from a vacuum consumer.
Dependencies are inferred from the claim text.