Claims
- 1. A hydraulic mount assembly for mounting an engine in a vehicle, comprising:
- a pair of mounting members;
- a hollow elastomeric body connected to said mounting members;
- an elastomeric diaphragm closing said hollow body and forming therewith a closed cavity that is filled with hydraulic fluid;
- means for partitioning said cavity into a primary chamber and a secondary chamber enclosed by said diaphragm;
- an orifice in said partitioning means connecting said chambers so as to effect damping;
- an expandable elastomeric bladder mounted within said primary chamber on one of said mounting members, said one mounting member having a piston surface at one side of said primary chamber, said bladder extending entirely across said piston surface so as to effectively buffer the entire piston surface and thereby isolate said one mounting member from the fluid in said primary chamber so that only elastomeric body stretching and not damping fluid movement occurs when said bladder deflates;
- communicates means for providing fluid communication between said bladder and the atmosphere;
- valve means for selectively opening and closing said communication means;
- variable pressure fluid supply means connected to said bladder to positively control the fluid pressure within said bladder;
- vehicle mounted transducer means for sensing vehicle operating conditions and resulting vibrations; and
- microprocessor means for selectively controlling said valve means and said variable pressure fluid supply means in response to signals from said transducer means whereby the damping and dynamic rate characteristics of said mount assembly may be tuned as desired especially for relatively high frequency vibrations.
- 2. The invention set forth in claim 1 wherein said bladder is integral with said elastomeric body.
- 3. The invention set forth in claim 1 wherein said transducers include both engine speed and vehicle vibration sensors.
Parent Case Info
This is a continuation-in-part of U.S. Patent Application Ser. No. 165,158 filed Mar. 7, 1988, now abandoned.
US Referenced Citations (18)
Foreign Referenced Citations (7)
Number |
Date |
Country |
0077195 |
Apr 1983 |
EPX |
3447746 |
Jul 1986 |
DEX |
0222635 |
Dec 1984 |
JPX |
0098237 |
Jun 1985 |
JPX |
0119832 |
Jun 1986 |
JPX |
0233237 |
Oct 1986 |
JPX |
0278639 |
Dec 1986 |
JPX |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
165158 |
Mar 1988 |
|