Engine detonation sensor with double shielded case

Details Engine detonation sensor with double shielded case Engine detonation sensor with double shielded case

1977-09-01

1978-06-27

Gill, James J.

Measuring and testing

Engine detonation

Combustion signal compared to reference signal varied by a...

310 26, G01P 1508, H01L 4114

Patent

active

040967352

ABSTRACT:
A detonation sensor adapted for mounting on a vehicle engine component has a cylindrical outer case with an open end. An inner cylindrical case has an open end facing in the opposite direction as that of the outer case and is so disposed coaxially within the outer case that it is held slightly axially separated therefrom by at least one rod of a magnetostrictive material and a magnet axially in line therewith. The edges of the open end of the outer case are crimped over a washer which abuts the closed end of the inner case to exert an axial stress on the magnetostrictive rod. Axial mounting means are provided on the outer case; and a pickup coil surrounds the magnetostrictive rod within the inner case. Both inner and outer cases are formed from a magnetic material to shield the coil from external electromagnetic signals.

REFERENCES:
patent: 2116522 (1938-05-01), Kunze
patent: 2269760 (1942-01-01), Eldredge
patent: 2435031 (1948-01-01), Burns et al.
patent: 2826706 (1958-03-01), Sackett
patent: 2846563 (1958-08-01), Cronin

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