Volume signal generator for thermodynamic cycle analyzers

Details Volume signal generator for thermodynamic cycle analyzers Volume signal generator for thermodynamic cycle analyzers

1974-11-04

1976-02-17

Myracle, Jerry W.

Measuring and testing

Vehicle drive train

Rear end

731173, G01M 1500

Patent

active

039383768

ABSTRACT:
An improved volume signal generator for use with a thermodynamic cycle analyzer for determining the mean effective pressure of an internal combustion engine, includes an axially rotatable cylindrical cam having a hollow truncated end providing an axially gyrating cam surface about the periphery thereof. A light source located within the hollow truncated end directs a radially disposed beam of light towards a photo diode so as to be cyclically interrupted by the cam surface during operation. The same light source cooperates with openings in the cylindrical wall of the cam and with a second photo diode to produce timing signals representative of the extreme positions of the engine's piston.

REFERENCES:
patent: 2314287 (1943-03-01), Pope
patent: 3358150 (1967-12-01), Summer
patent: 3815410 (1974-06-01), Brown, Jr. et al.

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