US 5,852,234 AGranted

Knocking detecting sensor

AssigneeNgk Spark Plug Co., Ltd.

InventorsNobuhiro Inoue, Sadamitsu Harada, Osamu Imamura

Life of this patent

Estimating the term…

Loading patent…

Abstract

A knocking detecting sensor for detecting knocking generated in an internal combustion engine includes a vibration detecting element, a terminal, a terminal holder, a casing and a sealing member. The vibration detecting element detects vibrations due to knocking. The terminal having a first and a second ends, the first end being connected to the vibration detecting element so as to take out an output therefrom. The terminal holder integrated with the terminal so as to hold it. The casing houses the vibration detecting element and the terminal holder, the casing having a terminal through-hole for externally protruding the second end of the terminal. The sealing member is arranged so as to surround the terminal between said terminal holder and the casing to prevent fluid from leaking into the inside of the casing from the terminal through-hole. Such a sensor structure assures airtightness of the casing and easiness of wiring the detecting element to the terminal.

Claims10

Dependent claims

A knocking detecting sensor for detecting knocking generated in an internal combustion engine, comprising:

a casing including a first section and a second section having a terminal through-hole, said first and second sections being coupled with each other;
a vibration detecting element for detecting vibrations from knocking and producing an output, said vibration detecting element being securely mounted in said first section;
a terminal holder having a groove portion and placed between said first section and said second section;
a terminal having a first end and a second end, said terminal being inserted through said terminal through-hole, said terminal being disposed through said groove portion and fixedly held by said terminal holder, said first end being connected to said vibration detecting element to receive said output;
and
a sealing member disposed in said groove portion and integrally formed with said terminal and terminal holder, said sealing member for preventing fluid from entering into said casing through said terminal through-hole.

3 more elements

Dependencies are inferred from the claim text.