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US 2019/0093525 A1Published application
Variable displacement engine including different cam lobe profiles
AssigneeFord Global Technologies, LLC
InventorsDanny Nakhle, Kevin Shinners, Robert Stephen Furby
Life of this patent
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Abstract
Methods and systems are provided for an engine including cams having different lobe profiles. In one example, cams of a first cam group drive a plurality of deactivatable cylinder valves and cams of a second cam group drive a plurality of non-deactivatable cylinder valves. The cams of the first cam group include a different lobe profile relative to cams of the second cam group.
Claims20
A system, comprising:
- a camshaft including first and second pluralities of cams, each cam of the first plurality of cams having a first cam lobe profile, and each cam of the second plurality of cams having a different, second cam lobe profile;
- a plurality of deactivatable cylinder valves driven by the first plurality of cams;
- and
- a plurality of non-deactivatable cylinder valves driven by the second plurality of cams.
1 more element
A system, comprising:
- an intake camshaft and an exhaust camshaft;
- a first intake cam and a second intake cam coupled to the intake camshaft, the first intake cam having a different cam lobe profile than the second intake cam, the first intake cam adapted to drive an intake valve of a first engine cylinder and the second intake cam adapted to drive an intake valve of a second engine cylinder;
- and
- a first exhaust cam and a second exhaust cam coupled to the exhaust camshaft, the first exhaust cam having a different cam lobe profile than the second exhaust cam, the first exhaust cam adapted to drive an exhaust valve of the first engine cylinder and the second exhaust cam adapted to drive an exhaust valve of the second engine cylinder.
1 more element
A line of engines, comprising:
- a first engine including a first plurality of cylinders having only a first set of non-deactivatable intake valves and a first camshaft including a first plurality of cams adapted to drive the first set of non-deactivatable intake valves, where all cams of the first plurality of cams have a same, first cam lobe profile;
- and
- a second engine including a second plurality of cylinders having a second set of non-deactivatable intake valves, a third plurality of cylinders having a third set of deactivatable intake valves, and a second camshaft including a second plurality of cams adapted to drive the second set of non-deactivatable intake valves and a third plurality of cams adapted to drive the third set of deactivatable intake valves, where the second plurality of cams have a second cam lobe profile and the third plurality of cams have a third cam lobe profile, where the first, second, and third cam lobe profiles are all different from one another.
Dependencies are inferred from the claim text.