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US 2015/0021141 A1Published application
Method and system for reducing vacuum use in a vehicle
AssigneeFord Global Technologies, LLC
InventorsRalph Wayne Cunningham, Ross Dykstra Pursifull, Russ William Ferguson
Life of this patent
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Abstract
A system and method for conserving vacuum within a vehicle is described. In one example, a vacuum level in a working chamber of a vacuum operated brake booster is controlled so as to limit vacuum consumption.
Claims20
A method for conserving vacuum, comprising:
- providing vacuum to a brake booster to apply vehicle brakes when a vehicle is stopped;
- and
- stopping brake booster vacuum consumption in response to a vacuum level in a working chamber of the brake booster being less than a threshold vacuum level that stops the vehicle from moving when the vehicle is stopped.
A method for conserving vacuum, comprising:
- starting an engine of a vehicle in response to a request to start the engine while a transmission of the vehicle is in park;
- and
- operating a first valve to reduce vacuum consumption of a brake booster while a driver is applying a brake actuator and while the transmission is in park.
A system for conserving vacuum, comprising:
- a transmission;
- vehicle brakes;
- a brake pedal;
- a vacuum brake booster coupled to the brake pedal and in communication with the vehicle brakes;
- and
- a controller including executable instructions stored in non-transitory memory to limit vacuum consumption via the vacuum brake booster while the transmission is being shifted and while the brake pedal is applied.
3 more elements
Dependencies are inferred from the claim text.