Device for noise configuration in a motor vehicle

• US 20020157897A1
• Filed: 03/21/2002
• Published: 10/31/2002
• Est. Priority Date: 03/21/2001
• Status: Active Grant

• Current Assignee: Daimler AG (Mercedes-Benz Group AG)
• Original Assignee: Daimler Chrysler Company LLC (Stellantis NV)
• Inventors: Hofmann, Marcus, Starobinski, Roudolf, Striebel, Hans
• Granted Patent: US 6,644,436 B2
• Time in Patent Office: Days
• US Class Current: 181/214
• CPC Class Codes: F02B 77/13 Acoustic insulation
• CPC Class Codes: G10K 11/22 for conducting sound through hollow pipes, e.g. speaking tubes

Abstract

A device for noise configuration in a motor vehicle has a hollow body which is divided into at least two spaces. One space is connected to a gas-carrying part of an internal combustion engine arranged in the motor vehicle, and the other space is coupled acoustically to an interior and/or to an engine space of the motor vehicle and/or to the space surrounding the motor vehicle. The hollow body is divided into the two spaces by an essentially acoustically inactive wall. A vibrational element, which extends into both spaces, is arranged within the hollow body.

Claims

1. Device for noise configuration in a motor vehicle, with at least one hollow body which is divided into at least two spaces, one space being connected to a gas-carrying part of an internal combustion engine arranged in the motor vehicle, and the other space being coupled acoustically to at least one of an interior of the motor vehicle, an engine space of the motor vehicle, and a space surrounding the motor vehicle,

wherein the hollow body is divided into two spaces by an essentially acoustically inactive wall, and

wherein a vibrational element which extends into both spaces is arranged within the hollow body.

2. Device according to claim 1, wherein the vibrational element divides the two spaces in each case into subspaces, at least the subspaces of the space connected to the gas-carrying part being connected to one another to allow pressure compensation.

3. Device according to claim 2, wherein the connection of the subspaces of the space connected to the gas-carrying part is formed by at least one bore in the vibrational element.

4. Device according to claim 2, wherein the connection of the subspaces of the space connected to the gas-carrying part is formed by at least one duct connecting the two subspaces.

5. Device according to claim 1, wherein the vibrational element has an elastic diaphragm connected to the hollow body and at least one plate attached to the diaphragm.

6. Device according to claim 2, wherein the vibrational element has an elastic diaphragm connected to the hollow body and at least one plate attached to the diaphragm.

7. Device according to claim 3, wherein the vibrational element has an elastic diaphragm connected to the hollow body and at least one plate attached to the diaphragm.

8. Device according to claim 4, wherein the vibrational element has an elastic diaphragm connected to the hollow body and at least one plate attached to the diaphragm.

9. Device according to claim 1, wherein the vibrational element is designed as a plate.

10. Device according to claim 2, wherein the vibrational element is designed as a plate.

11. Device according to claim 3, wherein the vibrational element is designed as a plate.

12. Device according to claim 4, wherein the vibrational element is designed as a plate.

13. Device according to claim 1, wherein the vibrational element is mounted rotatably about a center of rotation.

14. Device according to claim 5, wherein the vibrational element is mounted rotatably about a center of rotation.

15. Device according to claim 9, wherein the vibrational element is mounted rotatably about a center of rotation.

16. Device according to claim 13, wherein the center of rotation is located on the essentially acoustically inactive wall.

17. Device according to claim 1, wherein the vibrational element has two plates which are connected to one another via at least one connecting element and one of which is arranged in each case in each of the spaces.

18. Device according to claim 2, wherein the vibrational element has two plates which are connected to one another via at least one connecting element and one of which is arranged in each case in each of the spaces.

19. Device according to claim 17, wherein the two plates have different cross sections.

20. Device according to claim 17, wherein the connecting element is designed as at least one rod connecting the plates to one another.

21. Device according to claim 19, wherein the connecting element is designed as at least one rod connecting the plates to one another.

22. Device according to claim 20, wherein the rod is provided with a sealing device in a region merging from one space into the other space.

23. Device according to claim 22, wherein the sealing device is designed as a flexible diaphragm which is arranged in a bore receiving the rod and which is connected to the rod, the diameter of the bore being very much smaller than the diameter of the plates.

24. Device according to claim 17, wherein the connecting element has a magnetic coupling.

25. Device according to claim 19, wherein the connecting element has a magnetic coupling.

26. Device according to claim 20, wherein the connecting element has a magnetic coupling.

27. Device according to claim 22, wherein the connecting element has a magnetic coupling.

28. Device according to claim 23, wherein the connecting element has a magnetic coupling.

29. Device according to claim 5, wherein at least one of the at least one plates is designed in a sandwich form of construction and is provided with a coating.

30. Device according to claim 17, wherein each of the plates is designed in a sandwich form of construction and is provided with a coating.

31. Device according to claim 30, wherein the connecting element is designed as at least one rod connecting the plates to one another.

32. Device according to claim 1, wherein the gas-carrying part is an intake pipe of the internal combustion engine.

33. Device according to claim 1, wherein the gas-carrying part is an exhaust system of the internal combustion engine.

34. Device according to claim 1, wherein one of the two spaces of the hollow body is connected via a tubular line part to the one of the gas-carrying part of the motor vehicle and the space surrounding the motor vehicle, and wherein the other space is coupled acoustically via at least one line to one of the interior, the engine space and the space surrounding the motor vehicle.

35. Device according to claim 5, wherein the diaphragm consists of a gas-tight and liquid-tight material.

36. Device according to claim 1, wherein a plurality of vibrational elements are within the hollow body.

37. Device according to claim 2, wherein the subspace is connected to the surroundings via a bore.

38. Device according to claim 1, wherein a fraction of the vibrational element located in one of the spaces is larger than the fraction in the other space.

39. Device according to claim 38, wherein the fraction of the vibrational element located in the space coupled acoustically is larger than the fraction in the space connected to the gas carrying part.

40. Device according to claim 38, wherein the fraction of the vibrational element located in the space coupled acoustically is smaller than the fraction in the space connected to the gas carrying part.

41. Device according to claim 1, wherein at least one stop is arranged within the hollow body in order to limit the movement of the vibrational element.

42. Device according to claim 1, wherein a further hollow body is arranged between the hollow body and the at least one of the interior, the engine space, and the space surrounding the motor vehicle.

43. Device according to claim 34, wherein at least one line leads in each case from the two subspaces to the at least one of the interior, the engine space and the space surrounding the motor vehicle.

44. Device according to claim 1, wherein at least one closing device is arranged downstream of the hollow body.

45. Device according to claim 1, wherein at least one closing device is arranged upstream of the hollow body.

46. Device according to claim 44, wherein the at least one closing device can be activated electrically, hydraulically or pneumatically.

47. Device according to claim 45, wherein the at least one closing device can be activated electrically, hydraulically or pneumatically.

48. Device according to claim 34, wherein an additional hollow body is arranged in the at least one line to one of the interior, the engine space and the space surrounding the motor vehicle, and

wherein an absorbtion material is arranged at an entrance to the additional hollow body.

50. Noise control system according to claim 49, wherein said first hollow body space includes an inlet opening for gaseous medium from one of an intake and an exhaust system of a vehicle internal combustion engine.

51. Noise control system according to claim 50, wherein said second hollow body space is acoustically coupled in use to at least one of a vehicle passenger space, a vehicle engine space, and a space surrounding a vehicle.

52. Noise control system according to claim 50, wherein said second hollow space is acoustically coupled in use to a vehicle passenger space whereby sound is transmitted to the vehicle passenger space, which sound is controlled as a function of gaseous medium pressure in said first hollow space.

53. Noise control system according to claim 49, wherein said vibration transmitting means includes means extending through the acoustically inactive wall into both the first and second hollow body spaces.

54. Noise control system according to claim 53, wherein said first hollow body space includes an inlet opening for gaseous medium from one of an intake and an exhaust system of a vehicle internal combustion engine.

55. Noise control system according to claim 54, wherein said second hollow space is acoustically coupled in use to a vehicle passenger space whereby sound is transmitted to the vehicle passenger space, which sound is controlled as a function of gaseous medium pressure in said first hollow space.

57. A method according to claim 56, wherein said second hollow body space is acoustically coupled in use to at least one of a vehicle passenger space, a vehicle engine space, and a space surrounding a vehicle.

58. A method according to claim 56, wherein said second hollow space is acoustically coupled in use to a vehicle passenger space whereby sound is transmitted to the vehicle passenger space, which sound is controlled as a function of gaseous medium pressure in said first hollow space.

59. A method according to claim 58, wherein said vibration transmitting means includes means extending through the acoustically inactive wall into both the first and second hollow body spaces.

49. Noise control system for a motor vehicle comprising:

a hollow body including first and second hollow body spaces,

an essentially acoustically inactive wall in said hollow body separating the first and second hollow body spaces from one another, and

vibration transmitting means disposed in the hollow body and extending into both of the first and second hollow body spaces and operable to transmit sound between the spaces.

56. A method of controlling nose in a motor vehicle, comprising:

communicating gaseous medium from one of an intake and an exhaust system of a vehicle internal combustion to a first hollow body space of a hollow body,

separating said first hollow body space from a second hollow body space in said hollow body by an essentially acoustically inactive wall in said hollow body, and

transmitting vibrations from the gaseous medium in said first hollow body space to said second hollow body space by way of a vibration transmitting means disposed in the hollow body and extending into both the first and second hollow body spaces.