Torsion assembly for controllably providing torque to a camshaft
AssigneeSchaeffler Technologies AG & Co. KG
InventorsJeffrey Shewell, John Stallmann
Life of this patent
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Abstract
A torsion assembly for providing controllable torsion to a camshaft, including: a spring assembly including a first spring; and, a contact element arranged to engage at least one lobe for the camshaft. For a locked mode: the contact element is arranged to be displaced by the at least one cam lobe; the contact element is arranged to compress the first spring; and the first spring is arranged to impart a first torque to the camshaft via the contact element. For an unlocked mode, the contact element is arranged to be displaced by the at least one cam lobe and the contact element is arranged to impart a second torque, less than the first torque, to the cam shaft via the contact element.
Claims8
A torsion assembly for providing controllable torsion to a camshaft, comprising:
- a spring assembly including a first spring;
- and,
- a contact element arranged to engage at least one lobe for the camshaft, wherein:
- for a locked mode:
- the contact element is arranged to be displaced by the at least one cam lobe;
- the contact element is arranged to compress the first spring;
- and,
- the first spring is arranged to impart a first torque to the camshaft via the contact element;
- and,
- for an unlocked mode:
- the contact element is arranged to be displaced by the at least one cam lobe;
- and,
- the contact element is arranged to impart a second torque, less than the first torque, to the cam shaft via the contact element.
A torsion assembly for providing controllable torsion to a camshaft, comprising:
- a housing;
- a pressure chamber at least partially enclosed by the housing;
- at least one pin partially disposed in the pressure chamber;
- a first spring engaged with the at least one pin;
- a second spring engaged with the housing;
- a third spring;
- and,
- a piston engaged with the second and third springs, wherein:
- for a locked mode:
- the first spring is arranged to displace the at least one pin to block displacement of the piston with respect to the housing;
- the at least one cam lobe is arranged to displace the housing in the first direction to compress the third spring in the first direction to generate a first torque;
- and,
- the housing is arranged to transmit the first torque to the camshaft;
- for an unlocked mode:
- the pressure chamber is arranged to be pressurized to displace the at least one pin to enable displacement of the housing with respect to the piston;
- the at least one cam lobe is arranged to displace the housing to compress the second spring in the first direction to generate a second torque, less than the first torque;
- and,
- the housing is arranged to transmit the second torque to the camshaft.
Dependencies are inferred from the claim text.