The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 1988
Filed:
Sep. 14, 1987
Stanley E Smith, Dayton, OH (US);
John F Hoying, Dayton, OH (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A hydraulic mount assembly includes a pair of mounting members connected to each other through a hollow elastomeric body of natural or synthetic rubber. The body is closed by a resiliant diaphragm so as to form a cavity for damping liquid. A partition or plate is provided to divide the fluid filled cavity into two distinct chambers. A primary chamber is formed between the partition and the interior wall of the hollow body. A secondary chamber is formed between the partition and the interior wall of the diaphragm. A decoupler is mounted for reciprocal movement in the partition in response to low level alternating pressures in the chambers. At certain small vibratory amplitudes and high frequencies the decoupler eliminates undesirable hydraulic damping. The partition also includes at least two passages connecting the two chambers. A rotary valve is displaceable to direct the flow of fluid between the primary and secondary chambers through a selected passage or passages in the partition providing low, intermediate and maximum level damping. A solenoid actuator mounted on the partition includes multiple electric coils that allow the positive positioning of the rotary valve. A control circuit with onboard transducers is provided to monitor vehicle operating and road conditions. A microprocessor acts in response to the sensed conditions causing the necessary energization of the coils to provide the desired damping.