Method for cleaning a valve
AssigneeFord Global Technologies, LLC
InventorsTom Leroy, Brian David Eves, Andy Staughton
Life of this patent
Estimating the term…
Abstract
A method and system for cleaning a brake booster aspirator shut-off valve are provided. The shut-off valve is operable to selectively permit flow of intake air through an aspirator; the aspirator bypasses a throttle of an engine and provides a vacuum source for a brake booster. The method comprises determining whether the shut-off valve may require cleaning, opening the shut-off valve so as to permit a flow of air through the shut-off valve and clean the shut-off valve and adjusting the throttle position of the engine to compensate for the additional flow of intake air through the aspirator.
Claims20
A method of cleaning a brake booster aspirator shut-off valve, the shut-off valve being operable to selectively permit flow of intake air through an aspirator, the aspirator bypassing a throttle of an engine and providing a vacuum source for a brake booster, wherein the method comprises:
- determining whether the shut-off valve requires cleaning;
- at least partially opening the shut-off valve so as to permit a flow of air through the shut-off valve and clean the shut-off valve;
- and
- adjusting the throttle position of the engine to compensate for additional flow of intake air through the aspirator.
A method of cleaning an engine inlet manifold throttle comprising:
- determining whether throttle cleaning is requested;
- adjusting throttle position so as to disturb any contaminants which have settled on the throttle;
- and
- adjusting a position of a super aspirator shut-off valve to compensate for a change in flow of intake air through the throttle, the super aspirator shut-off valve selectively permitting a flow of intake air through an aspirator bypassing the throttle.
A system for cleaning a brake booster aspirator shut-off valve or a throttle of an engine, comprising:
- the shut-off valve being operable to selectively permit flow of intake air through an aspirator, the aspirator bypassing the throttle of the engine and providing a vacuum source for a brake booster,
- one or more controllers including executable instructions stored in memory for:
- determining whether the shut-off valve requires cleaning;
- at least partially opening the shut-off valve so as to permit a flow of air through the shut-off valve and clean the shut-off valve;
- and
- adjusting the throttle position of the engine to compensate for additional flow of intake air through the aspirator.
Dependencies are inferred from the claim text.