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US 11,994,043 B2Granted
Contaminant pathway for camshaft phaser
AssigneeSchaeffler Technologies AG & Co. KG
InventorsColin Foster, Shannon Fandale
Life of this patent
Estimating the term…
Abstract
A camshaft phaser is provided that includes a rotor, a stator, and a locking cover. The rotor is selectively locked to the stator via a locking assembly arranged within a locking bore of the rotor. Contaminant particles that enter a first locking end of the bore are exited out a second venting end of the bore via a contaminant particle exit pathway.
Claims20
A camshaft phaser configured for an internal combustion engine, the camshaft phaser comprising:
- a stator;
- a rotor rotatable with respect to the stator;
- a locking cover non-rotatably fixed to the stator, the locking cover having a locking cavity;
- and
- a locking assembly configured to be actuated via a pressurized hydraulic fluid within the locking cavity, the locking assembly comprising a locking part arranged within a bore of the rotor;
- and
- in a first locked position of the locking assembly, a first end of the locking part protrudes from a first locking end of the bore and engages the locking cavity;
- and
- in a second unlocked position of the locking assembly, the pressurized hydraulic fluid within the locking cavity yields a force acting on the first end of the locking part that is greater than a biasing force acting on the locking part to move the locking part out of the locking cavity so that the rotor can rotate relative to the stator;
- and
- the bore includes a contaminant particle exit pathway extending from the first locking end to a second venting end of the bore so that contaminant particles entering the first locking end are exited out the second venting end via the contaminant particle exit pathway.
8 more elements
A camshaft phaser configured for an internal combustion engine, the camshaft phaser comprising:
- a stator;
- a rotor rotatable with respect to the stator;
- a locking cover non-rotatably fixed to the stator;
- and
- a locking assembly configured to be actuated via hydraulic fluid to selectively lock the rotor to the stator, the locking assembly having a movable locking part arranged within a bore of the rotor;
- and
- the bore includes a first radial groove and a second longitudinal passage fluidly connected to the first radial groove such that the first radial groove and the second longitudinal passage define at least a portion of a contaminant particle exit pathway configured to move contaminant particles from a first locking end of the bore to a second venting end of the bore via the locking assembly, and
- wherein:
- the first radial groove is arranged radially between the movable locking part and the bore;
- and
- the first radial groove is offset from the first locking end such that:
- in a first locked position of the movable locking part, the first radial groove is sealingly covered by the movable locking part;
- and
- in a second unlocked position of the movable locking part, the first radial groove is uncovered by the movable locking part.
11 more elements
A camshaft phaser configured for an internal combustion engine, the camshaft phaser comprising:
- a stator;
- a rotor rotatable with respect to the stator;
- a locking cover non-rotatably fixed to the stator;
- and
- a locking assembly arranged within a bore of the rotor and configured to be actuated via hydraulic fluid to selectively lock the rotor to the stator, the locking assembly having a movable locking part and a spring, and a first end of the movable locking part configured to engage the stator;
- and
- the locking assembly and the bore define a contaminant particle exit pathway extending from a first open end of the bore to a second venting end of the bore so that contaminant particles entering the first open end are exited out of the second venting end via the contaminant particle exit pathway,
- wherein the contaminant particle exit pathway comprises:
- a radial passage offset from the first open end of the bore, the radial passage extending:
- i) radially outwardly from the bore, and ii) completely around the first end of the movable locking part so that the first end of the movable locking part is cleansed via the radial passage;
- and
- a first longitudinal passage continuously fluidly connected to the radial passage, the first longitudinal passage arranged downstream of the radial passage.
9 more elements
Dependencies are inferred from the claim text.