Damper with electro-magnetic actuator
US-10690215-B2 · Jun 23, 2020 · US
Suspension device
US12085137B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12085137-B2 |
| Application number | US-202217681717-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 26, 2022 |
| Priority date | Mar 2, 2021 |
| Publication date | Sep 10, 2024 |
| Grant date | Sep 10, 2024 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A suspension device includes: a hydraulic damper including a rod provided with a valve for generating a hydraulic pressure when the rod is displaced between a first liquid chamber and a second liquid chamber; an electric damper configured to electrically displace the rod by an actuator; and a communication passage that establishes communication between the first liquid chamber and the second liquid chamber while bypassing the valve during operation of the electric damper.
First claim
Opening claim text (preview).
What is claimed is: 1. A suspension device comprising: a hydraulic damper including a rod provided with a valve for generating a hydraulic pressure when the rod is displaced between a first liquid chamber and a second liquid chamber; an electric damper configured to electrically displace the rod by an actuator; an outer casing configured to accommodate the hydraulic damper and the electric damper; an inner cylinder housed in the outer casing; and a communication passage that establishes communication between the first liquid chamber and the second liquid chamber while bypassing the valve during operation of the electric damper, wherein the communication passage is provided outside the inner cylinder, the electric damper comprises a magnet and a coil, and the magnet has an in-magnet flow passage formed in the magnet to establish communication between the first liquid chamber and the second liquid chamber. 2. The suspension device according to claim 1 , wherein the communication passage is provided with an opening and closing unit configured to open and close the communication passage. 3. The suspension device according to claim 2 , wherein the opening and closing unit uses magnetic force generated by a linear motor. 4. The suspension device according to claim 1 , wherein the electric damper is an electromagnetic damper that uses magnetic force generated by a linear motor. 5. The suspension device according to claim 1 , wherein a hole is provided between the first liquid chamber and the communication passage at a position where the magnet of the electric damper does not close the hole when the electric damper has a maximum stroke. 6. The suspension device according to claim 1 , wherein the coil is provided between the outer casing and the inner cylinder, and the coil has an in-coil passage that constitutes part of the communication passage. 7. A suspension device comprising: a hydraulic damper including a rod provided with a valve for generating a hydraulic pressure when the rod is displaced between a first liquid chamber and a second liquid chamber; an electric damper configured to electrically displace the rod by an actuator; an outer casing configured to accommodate the hydraulic damper and the electric damper; an inner cylinder housed in the outer casing; and a communication passage that establishes communication between the first liquid chamber and the second liquid chamber while bypassing the valve during operation of the electric damper, wherein the communication passage is provided outside the inner cylinder, the electric damper comprises a magnet and a coil, the coil is provided between the outer casing and the inner cylinder, and the coil has an in-coil passage that constitutes part of the communication passage.
Assignees
Inventors
Classifications
Fluid damping · CPC title
Damping action or damper · CPC title
Linear motor · CPC title
- B60G17/0157Primary
non-fluid unit, e.g. electric motor · CPC title
Reducing road induced vibrations · CPC title
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Frequently asked questions
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- What does patent US12085137B2 cover?
- A suspension device includes: a hydraulic damper including a rod provided with a valve for generating a hydraulic pressure when the rod is displaced between a first liquid chamber and a second liquid chamber; an electric damper configured to electrically displace the rod by an actuator; and a communication passage that establishes communication between the first liquid chamber and the second li…
- Who is the assignee on this patent?
- Honda Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B60G17/0157. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Sep 10 2024 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 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).