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Title: Low viscous drag knock sensor

Abstract

This patent describes a low viscous drag knock sensor comprising: a housing defining an interior air filled chamber therein, the housing being operatively connectable with an internal combustion engine to be vibrated in response to engine knock; a diaphragm mounting member operatively connected with the housing and disposed in the housing chamber; a diaphragm including a central portion, a stiffening rib surrounding the central portion, and an edge portion disposed peripherally around the stiffening rib. The diaphragm central portion is mounted to the diaphragm mounting member, the diaphragm edge portion being supported only by the diaphragm stiffening rib and diaphragm central portion such that the diaphragm edge portion is free to move relative to the housing; the diaphragm peripheral edge portion defining passages there through for reducing drag from air flowing from one side of the diaphragm to another during vibratory displacement thereof, whereby the passages reduce a resonant frequency bandwidth of the diaphragm; and a transducer for providing an electrical output signal which varies with sensed vibratory displacement. The transducer is operatively connected to the diaphragm central portion to produce an output electrical signal which varies with vibratory displacement thereof.

Inventors:
Publication Date:
OSTI Identifier:
7050204
Patent Number(s):
US 4630465
Assignee:
Eaton Corp., Cleveland, OH
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 19 Nov 1984
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; INTERNAL COMBUSTION ENGINES; KNOCK CONTROL; AIR FLOW; DRAG; FREQUENCY CONTROL; MECHANICAL VIBRATIONS; SIGNALS; TRANSDUCERS; VISCOSITY; CONTROL; ENGINES; FLUID FLOW; GAS FLOW; HEAT ENGINES; 330100* - Internal Combustion Engines

Citation Formats

Hatton, B M. Low viscous drag knock sensor. United States: N. p., 1986. Web.
Hatton, B M. Low viscous drag knock sensor. United States.
Hatton, B M. 1986. "Low viscous drag knock sensor". United States.
@article{osti_7050204,
title = {Low viscous drag knock sensor},
author = {Hatton, B M},
abstractNote = {This patent describes a low viscous drag knock sensor comprising: a housing defining an interior air filled chamber therein, the housing being operatively connectable with an internal combustion engine to be vibrated in response to engine knock; a diaphragm mounting member operatively connected with the housing and disposed in the housing chamber; a diaphragm including a central portion, a stiffening rib surrounding the central portion, and an edge portion disposed peripherally around the stiffening rib. The diaphragm central portion is mounted to the diaphragm mounting member, the diaphragm edge portion being supported only by the diaphragm stiffening rib and diaphragm central portion such that the diaphragm edge portion is free to move relative to the housing; the diaphragm peripheral edge portion defining passages there through for reducing drag from air flowing from one side of the diaphragm to another during vibratory displacement thereof, whereby the passages reduce a resonant frequency bandwidth of the diaphragm; and a transducer for providing an electrical output signal which varies with sensed vibratory displacement. The transducer is operatively connected to the diaphragm central portion to produce an output electrical signal which varies with vibratory displacement thereof.},
doi = {},
url = {https://www.osti.gov/biblio/7050204}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {12}
}