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US 10,598,054 B2Granted
Variable ratio rocker arm system
AssigneeDeere & Company
InventorDale J. Swehla
Life of this patent
Estimating the term…
Abstract
A rocker arm system provides variable ratio valve actuation. A rocker arm extends between a pair of ends. One end receives a movement input and the second end delivers a movement output. The rocker arm reacts against a bearing cap to deliver the movement output in response to the movement input. The bearing cap includes a load surface facing the rocker arm that defines a trajectory of the rocker arm.
Claims19
A rocker arm system comprising:
- a rocker arm extending from a first end to a second end, the first end configured to receive a movement input and the second end configured to deliver a movement output;
- a bearing cap against which the rocker arm is configured to react to deliver the movement output in response to the movement input, the bearing cap including a load surface facing the rocker arm that defines a trajectory of the rocker arm;
- and
- a roller disposed between the rocker arm and the bearing cap and configured to roll along the load surface when the rocker arm moves through the trajectory;
- wherein the load surface defines variable curvatures having radii that differ from one another to vary a rate of the movement output.
2 more elements
A rocker arm system comprising:
- a rocker arm extending from a first end to a second end, the first end configured to receive a movement input and the second end configured to deliver a movement output;
- a bearing cap against which the rocker arm is configured to react to deliver the movement output in response to the movement input, the bearing cap including a load surface facing the rocker arm that defines a trajectory of the rocker arm;
- and
- a lift adjuster engaging the bearing cap on a side opposite the rocker arm, the lift adjuster configured to force the bearing cap toward the rocker arm to adjust the rocker arm system.
1 more element
A rocker arm system comprising:
- a valve configured to open and close;
- a cam configured to impart movement to the rocker arm system;
- a rocker arm extending between a first end and a second end, the cam imparting the movement to the rocker arm at the first end and the valve engaged with the rocker arm at the second end;
- a bearing cap that has a load surface facing the rocker arm, the load surface defining a trajectory of the rocker arm, wherein the rocker arm is configured to move through the trajectory when the cam imparts the movement;
- and
- a roller disposed between the rocker arm and the bearing cap and configured to roll along the load surface when the cam imparts the movement.
3 more elements
A rocker arm system comprising:
- an engine defining a combustion chamber;
- a valve configured to open and close the combustion chamber;
- a cam disposed in the engine and configured to rotate;
- a rocker arm extending between a first end and a second end, the cam configured to impart a movement input to the rocker arm at the first end and the valve engaged with the rocker arm at the second end, the rocker arm configured to deliver a movement output to the valve in response to the movement input;
- a bearing cap that has a load surface facing the rocker arm, the load surface configured to define a trajectory of the rocker arm, wherein the rocker arm is configured to move through the trajectory when the cam imparts the movement input;
- and
- a roller disposed between the rocker arm and the bearing cap and configured to roll along the load surface when the cam imparts the movement input.
4 more elements
Dependencies are inferred from the claim text.