Engine system and method for pendulum damping
AssigneeFord Global Technologies, LLC
InventorsThomas G. Leone, Jeffrey Eliot Chottiner
Life of this patent
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Abstract
Methods and systems for adjusting a tuning state of a pendulum damper are provided. In one example, an engine system is provided that includes a crankshaft coupled to a plurality of pistons in a plurality of cylinders. The crankshaft includes a plurality of pendulums coupled to a plurality of cheeks and a pendulum tuning mechanism coupled to an associated pendulum included in the plurality of pendulums or coupled to an associated pendulum in a torque converter and configured to tune damping characteristics of the associated pendulum based on an engine order.
Claims20
An engine system comprising:
- a crankshaft coupled to a plurality of pistons in a plurality of cylinders;
- a plurality of pendulums coupled to the crankshaft, either directly or through an adjacent component;
- and
- a pendulum tuning mechanism coupled to an associated pendulum included in the plurality of pendulums and configured to tune damping characteristics of the associated pendulum based on engine order.
A method for operating an engine system, comprising:
- operating a pendulum tuning mechanism coupled to an associated pendulum to adjust a tuning state of the associated pendulum based on a change in engine order of a plurality of cylinders;
- where associated pendulum is coupled to a cheek on a crankshaft or included in a torque converter or other component rotationally coupled to the crankshaft;
- and
- where the cheek is coupled to a crankpin coupled to a piston in one of the plurality of cylinders.
An engine system comprising:
- a crankshaft coupled to a plurality of pistons in a plurality of cylinders;
- a plurality of pendulums coupled to the crankshaft, either directly or through an adjacent component;
- and
- a pendulum tuning mechanism coupled to a pendulum and configured to tune damping characteristics of the associated pendulum, where the pendulum is included in the plurality of pendulums;
- a controller comprising:
- computer readable instructions stored on non-transitory memory that when executed during a cylinder deactivation transition, cause the controller to:
- operate the pendulum tuning mechanism to adjust a mass of the pendulum, a center of gravity of the pendulum, a rolling path of the pendulum, or a diameter of a rolling pin mated with an opening in the pendulum in responsive to an adjustment in engine order.
Dependencies are inferred from the claim text.