Hydraulic engine-mount

Patent metadata

Field	Value
Publication number	US-10436281-B2
Application number	US-201715799412-A
Country	US
Kind code	B2
Filing date	Oct 31, 2017
Priority date	Jul 14, 2017
Publication date	Oct 8, 2019
Grant date	Oct 8, 2019

Abstract

A hydraulic engine mount, capable of preventing a rattle noise, improving Noise, Vibration, and Harshness (NVH) performance by lowering dynamic characteristics of the hydraulic engine mount in an idling state, and capable of generating a high damping value in a state having a relatively large amount of vibration displacement, includes a case having a hydraulic fluid sealed therein, a nozzle plate having a lower nozzle plate and an upper nozzle plate coupled to an upper portion of the lower nozzle plate, and dividing an inside of the case into an upper fluid chamber and a lower fluid chamber, a first membrane disposed on the upper portion of the lower nozzle plate such that a first edge portion of the first membrane is tightly coupled to the upper portion of the lower nozzle plate, and provided with at least one first communicating hole, a second membrane disposed on a lower portion of the upper nozzle plate such that a second edge portion of the second membrane is tightly coupled to the lower portion of the upper nozzle plate, and provided with at least one second communicating hole, and a separation plate allowing the first membrane and the second membrane to be apart from each other so as to provide a flow space between the first membrane and the second membrane.

First claim

What is claimed is:

1. A hydraulic engine mount comprising:
a case having a hydraulic fluid sealed therein;
a nozzle plate having a lower nozzle plate and an upper nozzle plate coupled to an upper portion of the lower nozzle plate, and dividing an inside of the case into an upper fluid chamber and a lower fluid chamber;
a first membrane disposed on the upper portion of the lower nozzle plate such that a first edge portion of the first membrane is tightly coupled to the upper portion of the lower nozzle plate, and provided with at least one first communicating hole;
a second membrane disposed on a lower portion of the upper nozzle plate such that a second edge portion of the second membrane is tightly coupled to the lower portion of the upper nozzle plate, and provided with at least one second communicating hole; and
a separation plate allowing the first membrane and the second membrane to be apart from each other so as to provide a flow space between the first membrane and the second membrane,
wherein the separation plate has an annular shape, and the separation plate comprises an opening portion of which a central portion is opened to form the flow space.

2. The hydraulic engine mount of claim 1 , wherein
the at least one first communicating hole and the at least one second communicating hole are disposed in different positions with respect to a vertical direction of the nozzle plate.

3. The hydraulic engine mount of claim 2 , wherein
a lower center hole communicated with the lower fluid chamber is provided in a central portion of the lower nozzle plate and an upper center hole communicated with the upper fluid chamber is provided in a central portion of the upper nozzle plate.

4. The hydraulic engine mount of claim 3 , wherein
the lower nozzle plate comprises:
a flow channel formed in an annular shape along a circumference of the lower center hole to allow the hydraulic fluid to flow from the upper fluid chamber to the lower fluid chamber or from the lower fluid chamber to the upper fluid chamber; and
a first communicating portion provided in one end portion of the flow path to allow the flow channel to be communicated with the lower fluid chamber.

5. The hydraulic engine mount of claim 4 , wherein
the upper nozzle plate comprises a second communicating portion configured to allow another end portion of the flow channel to be communicated with the upper fluid chamber.

6. The hydraulic engine mount of claim 5 , wherein
a distance between the first membrane and the second membrane is greater than a displacement of the first membrane or the second membrane when a relatively small amount of vibration is generated in an idling state.

7. The hydraulic engine mount of claim 6 , wherein
in the idling state, the hydraulic fluid of the upper fluid chamber flows to the flow space by passing through the upper center hole and the at least one second communicating hole, and then flows to the lower fluid chamber by passing through the at least one first communicating hole and the lower center hole.

8. The hydraulic engine mount of claim 6 , wherein
in the idling state, the hydraulic fluid of the lower fluid chamber flows to the flow space by passing through the lower center hole and the at least one first communicating hole and then flows to the upper fluid chamber by passing through the at least one second communicating hole and the upper center hole.

9. The hydraulic engine mount of claim 5 , wherein
a distance between the first membrane and the second membrane is less than a displacement of the first membrane or the second membrane when a relatively large amount of vibration is generated.

10. The hydraulic engine mount of claim 9 , wherein when the relatively large amount of vibration is generated,
the at least one first communicating hole and the at least one second communicating hole are blocked by the second membrane and the first membrane, respectively, and
the hydraulic fluid of the upper fluid chamber is prevented from flowing to the lower fluid chamber through the flow space, and the hydraulic fluid of the lower fluid chamber is prevented from flowing to the upper fluid chamber through the flow space.

11. The hydraulic engine mount of claim 10 , wherein
when the relatively large amount of vibration is generated, the hydraulic fluid of the upper fluid chamber and the lower fluid chamber flows through only the flow channel.

12. The hydraulic engine mount of claim 1 , wherein
the separation plate comprises:
a first locking protrusion protruding downward along a circumference of the opening portion; and
a second locking protrusion protruding upward along the circumference of the opening portion.

13. The hydraulic engine mount of claim 12 , wherein
the first membrane comprises the first edge portion protruding downward from an edge of the first membrane and a first locking groove being recessed downward from an edge portion of an upper surface of the first membrane.

14. The hydraulic engine mount of claim 13 , wherein
the second membrane comprises the second edge portion protruding upward from an edge of the second membrane and a second locking groove being recessed upward from an edge portion of a lower surface of the second membrane.

15. The hydraulic engine mount of claim 14 , wherein
the lower nozzle plate comprises a first groove portion tightly coupled to the first edge portion and the upper nozzle plate comprises a second groove portion tightly coupled to the second edge portion.

16. The hydraulic engine mount of claim 15 , wherein
movement of the first membrane in a circumferential direction of the first membrane is prevented, by having the first edge portion fixed to the first groove portion of the lower nozzle plate and the first locking protrusion of the separation plate locked to the first locking groove.

17. The hydraulic engine mount of claim 15 , wherein
movement of the second membrane in a circumferential direction of the second membrane is prevented, by having the second edge portion fixed to the second groove portion of the upper nozzle plate and the second locking protrusion of the separation plate locked to the second locking groove.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Kim Hyo Seok

Classifications

• F16F13/107 Primary

  Passage design between working chambers · CPC title

• B60K5/1225

  comprising resilient rings surrounding a part of the unit · CPC title

• B60K5/12

  Arrangement of engine supports · CPC title

• B60K5/1208 Primary

  Resilient supports (B60K5/1241 - B60K5/1291 take precedence) · CPC title

• F16F13/10

  the wall being at least in part formed by a flexible membrane or the like (F16F13/14 - F16F13/18 take precedence) · CPC title