System and method for managing noise and vibration in a vehicle using electro-dynamic regenerative force and vehicle having same

Patent metadata

Field	Value
Publication number	US-9587704-B2
Application number	US-201313959129-A
Country	US
Kind code	B2
Filing date	Aug 5, 2013
Priority date	Aug 5, 2013
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

A system for managing noise and vibration in a vehicle includes a housing defining an internal cavity. A compliant member is attached to the housing and further defines the internal cavity. A magnet is operatively fixed to the housing in the cavity and has a magnetic field. A coil is positioned in the cavity and is configured so that there is relative movement between the coil and the magnet in the magnetic field in response to movement of the compliant member relative to the housing. A resistor is in electrical communication with the coil to form an electrical circuit. Relative movement of the coil in the magnetic field induces a current in the circuit that creates an opposing magnetic field, thereby reducing transmitted dynamic forces.

First claim

The invention claimed is:

1. A system for managing noise and vibration in a vehicle comprising:
a housing defining an internal cavity;
a first compliant member attached to the housing and further defining the internal cavity;
a magnet having a magnetic field;
a coil; wherein one of the magnet and the coil is operatively fixed to the housing in the cavity;
wherein the other of the magnet and the coil is positioned in the cavity and is configured to move relative to the one of the magnet and the coil in response to movement of the first compliant member relative to the housing;
a resistor in electrical communication with the coil to form an electrical circuit; relative movement of said other of the magnet and the coil inducing a current in the circuit that creates an opposing magnetic field;
a diaphragm operatively connected to the coil and at least partially separating the internal cavity into a first portion and a second portion; wherein the first portion is between the first compliant member and the diaphragm and contains a first fluid, and the second portion contains the magnet, the coil, and the resistor; wherein forces acting on the first compliant member are transferred to the diaphragm by the first fluid to thereby move said one of the magnet and the coil relative to said other of the magnet and the coil;
a hydraulic damper positioned in parallel with the diaphragm in the housing; wherein the hydraulic damper has:
a structure positioned in the first portion that defines a passage and that divides the first portion into a first fluid cavity and a second fluid cavity, with the passage fluidly connecting the first fluid cavity to the second fluid cavity; and

a second compliant member positioned in the second fluid cavity and operable to vary a volume of the second fluid cavity in response to flow of the first fluid through the passage.

2. The system of claim 1 , wherein the circuit is without an electronic controller.

3. The system of claim 1 , further comprising:
a battery;
a switch movable between a first position and a second position to connect and disconnect the battery from the coil; and
a processor operatively connected to the switch and to the battery and configured to execute a stored algorithm to move the switch to the first position in response to at least one predetermined operating parameter, thereby providing current from the battery to the coil only when the switch is in the first position to affect movement or stiffness of the coil based on said at least one predetermined operating parameter.

4. The system of claim 3 , wherein the processor and the switch are integrated as an electronic control module.

5. A vehicle comprising:
a first vehicle component and a second vehicle component;
a housing operatively fixed to the second vehicle component and defining an internal cavity;
a first compliant member attached to the housing and further defining the internal cavity;
wherein the first vehicle component is operatively supported by the first compliant member relative to the second vehicle component such that the first compliant member moves when the first vehicle component moves relative to the second vehicle component;
a magnet operatively fixed to the housing and having a magnetic field;
a coil positioned in the cavity and configured to such that there is relative movement between the coil and the magnet in the magnetic field in response to movement of the first compliant member relative to the housing;
a resistor in electrical communication with the coil to form an electrical circuit; relative movement between the coil and the magnet in the magnetic field inducing a current in the circuit that creates an opposing magnetic field proportional to the relative movement between the coil and the magnet in the magnetic field;
a diaphragm operatively connected to the coil and at least partially separating the internal cavity into a first portion and a second portion; wherein the first portion is between the first compliant member and the diaphragm and contains a first fluid; wherein the second portion contains the magnet, the coil, and the resistor;
a hydraulic damper positioned in parallel with the diaphragm in the housing; wherein the hydraulic damper has:
a structure positioned in the first portion defining a passage and that divides the first portion into a first fluid cavity and a second fluid cavity with the passage fluidly connecting the first fluid cavity with the second fluid cavity; and

a second compliant member positioned in the second fluid cavity and operable to vary a volume of the second fluid cavity in response to flow of the first fluid through the passage.

6. The vehicle of claim 5 , wherein the circuit is without an electronic controller.

7. The vehicle of claim 5 , further comprising:
a battery;
a switch selectively movable between a first position and a second position; wherein the coil is operatively connected to the battery when the switch is in the first position; wherein the coil is operatively connected to the resistor when the switch is in the second position; and
a processor operatively connected to the switch and to the battery and configured to execute a stored algorithm to selectively move the switch to the first position in response to at least one predetermined vehicle operating parameter, thereby providing current from the battery to the coil only when the switch is in the first position to affect movement of or stiffness of the coil based on said at least one predetermined vehicle operating parameter.

8. The vehicle of claim 7 , wherein the processor and the switch are integrated as an electronic control module.

9. The vehicle of claim 7 , wherein said at least one predetermined vehicle operating parameter is a frequency of vibration of one of the vehicle components; and wherein the switch is moved to the first position when the frequency of vibration of said one of the vehicle components is greater than a predetermined frequency of vibration.

10. A method of managing noise and vibration in a vehicle comprising:
determining at least one operating parameter of the vehicle;
providing electrical current from a battery to a coil of an electro-dynamic mount when said at least one operating parameter is within a first predetermined range of values; wherein the electro-dynamic mount operatively connects a first vehicle component to a second vehicle component and the current in the coil provided from the battery to the coil creates a magnetic field that opposes movement of a magnet relative to the coil; and
operatively connecting a resistor to the coil in a closed electrical circuit when said at least one operating parameter is within a second predetermined range of values, electrical current thereby being induced in the circuit due to relative movement of the coil in a magnetic field of the magnet;
wherein the electro-dynamic mount includes:
a housing operatively fixed to the second vehicle component and defining an internal cavity;
a compliant member attached to the housing and further defining the internal cavity;
wherein the first vehicle component is operatively supported by the compliant member relative to the second vehicle component such that the compliant member moves when the first vehicle component moves relative to the second vehicle component;
a diaphragm operatively connected to the coil and at least partially separating the internal cavity into a first portion and a second portion; wherein the first portion is between the compliant member and the diaphragm and contains a first fluid; and wherein the second portion contains the magnet, the coil, and the resistor

wherein the compliant member is a first compliant member, and fu

Assignees

• Gm Global Tech Operations Llc

Inventors

• Lee Ping
• Jomaa Sam M

Classifications

• F16F15/005 Primary

  using electro- or magnetostrictive actuation means (generating of mechanical vibrations operating with electrostriction B06B1/06, with magnetostriction B06B1/08; vehicle suspension arrangements characterised by use of piezoelectric elements B60G17/01941; piezoelectric, electrostrictive and magnetostrictive devices per se H10N30/00) · CPC title

• F16F13/264 Primary

  comprising means for acting dynamically on the walls bounding a working chamber · CPC title