Method and apparatus for measurement of engine ignition timing

Details Method and apparatus for measurement of engine ignition timing Method and apparatus for measurement of engine ignition timing

1980-07-08

1982-05-25

Myracle, Jerry W.

Measuring and testing

Vehicle chassis

Steering

324391, 333260, G01M 1500

Patent

active

043310290

ABSTRACT:
Method and apparatus for measuring ignition timing of an internal combustion engine wherein angular position of the engine crankshaft is monitored while microwave radiation is injected into a selected engine cylinder. An angular position of the engine crankshaft at an apparent top dead center position of the piston in the selected cylinder is identified as a function of microwave resonances within the cylinder. The angle of piston top dead center position is then compared with an event correlated with ignition at the selected cylinder to determine the ignition angle relative to the piston top dead center position. Ignition timing may then be adjusted to obtain a desired angular relationship between ignition and piston top dead center.

REFERENCES:
patent: 3155930 (1964-11-01), Lovejoy
patent: 3589177 (1971-06-01), Merlo
patent: 3703825 (1972-11-01), Merlo
Lienesch, J. H. et al., Using Microwaves . . . Position, SAE Paper No. 790103, Feb. 1979.

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