Method and apparatus for utilizing microwaves for internal combu

Details Method and apparatus for utilizing microwaves for internal combu Method and apparatus for utilizing microwaves for internal combu

1982-10-26

1984-09-04

Myracle, Jerry W.

Measuring and testing

Vehicle chassis

Steering

73119R, 73120, G01M 1500

Patent

active

044689560

ABSTRACT:
A method and apparatus is disclosed for determining various diagnostic conditions of an internal combustion engine from an analysis of the resonances of a reflected microwave signal radiated into a combustion chamber of the internal combustion engine. Various parameters of each microwave resonance are calculated including: (1) the location of the resonance with respect to the crank angle of a crankshaft of the engine; (2) the peak-to-peak amplitude of the resonance; (3) the slope of the resonance; (4) the quality factor or "Q" of the resonance; and (5) the symmetry of parameters 1 through 4 with respect to turnaround points of the piston in the cylinder of the engine. The calculated parameters are thereafter correlated with reference parameters to determine the particular diagnostic condition.

REFERENCES:
patent: 3589177 (1970-06-01), Merlo
patent: 3703825 (1972-11-01), Merlo
patent: 4331029 (1982-05-01), Wilson
patent: 4384480 (1983-05-01), Krage

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