SOC signal analysis

Details SOC signal analysis SOC signal analysis

1986-03-26

1987-03-24

Levy, Stewart J.

Measuring and testing

Test stand

For engine

G01M 1500

Patent

active

046515623

ABSTRACT:
According to the invention, the time for start of combustion in an engine cylinder is provided by disposing a sensor in the combustion chamber of the cylinder, said sensor providing a signal indicative of the amplitude/time of the combustion event within the cylinder. Two signal levels are measured, a first level which is above the noise in the signal and a second level which is below the maximum amplitude of the signal which may be attenuated by carbon buildup on the sensor. By extrapolating backwards from these two sensed levels, a reference time for start of combustion is calculated.

REFERENCES:
patent: 3067610 (1962-12-01), Bockemuehl et al.
patent: 4424568 (1984-01-01), Nishimura et al.
patent: 4463729 (1984-08-01), Bullis et al.
patent: 4583507 (1986-04-01), Greeves et al.

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