Method and apparatus for controlling a phase varying apparatus
US-2015377084-A1 · Dec 31, 2015 · US
Variable valve actuation apparatus of internal combustion engine
US8997705B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8997705-B2 |
| Application number | US-201314025558-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 12, 2013 |
| Priority date | Apr 28, 2010 |
| Publication date | Apr 7, 2015 |
| Grant date | Apr 7, 2015 |
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Abstract
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In a variable valve actuation apparatus with a speed reducer between a timing sprocket and a camshaft for changing a phase of the camshaft relative to the sprocket, while reducing normal-rotation/reverse-rotation of an electric motor, the speed reducer includes an eccentric rotation member connected to an output shaft of the motor, an annular member connected to the sprocket, a plurality of rollers installed between an inner toothed portion of the annular member and an outer peripheral surface of the eccentric rotation member, and a cage connected to the camshaft for circumferentially partitioning the respective rollers, while permitting a radial displacement of each roller. Depending on a dimension of a clearance space between the eccentric rotation member and the annular member, a suitable one of a plurality of roller sets, each having a different outside diameter, is selected, and then the selected rollers are installed.
First claim
Opening claim text (preview).
What is claimed is: 1. A variable valve actuation apparatus of an internal combustion engine configured to vary an operating characteristic of an engine valve permanently biased in a direction closing of the engine valve by a valve spring, by changing an angular position of a second member relative to a first member, comprising; an electric motor in which a state of rotation of the electric motor is controlled responsively to a control signal; an eccentric rotation member config…
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Cross-Sectional Technologies · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- F01L1/344Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US8997705B2 cover?
- In a variable valve actuation apparatus with a speed reducer between a timing sprocket and a camshaft for changing a phase of the camshaft relative to the sprocket, while reducing normal-rotation/reverse-rotation of an electric motor, the speed reducer includes an eccentric rotation member connected to an output shaft of the motor, an annular member connected to the sprocket, a plurality of rol…
- Who is the assignee on this patent?
- Hitachi Automotive Systems Ltd
- What technology area does this patent fall under?
- Primary CPC classification F01L1/344. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Apr 07 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).