Measuring and testing – Engine detonation – Combustion signal compared to a fixed reference signal or...
Reexamination Certificate
2006-02-24
2008-11-25
Raevis, Robert R (Department: 2856)
Measuring and testing
Engine detonation
Combustion signal compared to a fixed reference signal or...
Reexamination Certificate
active
07454954
ABSTRACT:
A knocking presence evaluation circuit in an internal combustion engine having a pressure sensor facing a combustion chamber for each cylinder in the engine and suitable to produce a pressure signal, the circuit having an input terminal; a processing block connected by the input terminal to the pressure sensor and receiving the pressure signal, the processing block performing a processing of the pressure signal for isolating oscillations and generating a derived pressure signal; an acquisition block connected to the processing block and receiving the derived pressure signal and generating first and second measure signals, respectively corresponding to a number and a total duration of digital pulses, from the derived pressure signal; and a soft-computing block connected to the acquisition block and receiving the first and second measure signals and outputting a knocking intensity index, calculated by soft-computing techniques, starting from the first and second measure signals.
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Millo and Ferraro, “Knock in S.I. Engines: A Comparison Between Different Techniques for Detection and Control,” SAE Technical Paper Series 982477, International Fall Fuels and Lubricants Meeting and Exposition, San Francisco, California, Oct. 19-22, 1998.
Lavorgna Mario
Moselli Giovanni
Taglialatela Ferdinando
Jorgenson Lisa K.
Raevis Robert R
Seed IP Law Group PLLC
STMicroelectronics S.r.l.
Tarleton E. Russell
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