Internal-combustion engines – Combustion chamber means combined with air-fuel mixture...
Patent
1991-02-05
1992-05-26
Argenbright, Tony M.
Internal-combustion engines
Combustion chamber means combined with air-fuel mixture...
73 35, G01L 2322, F02P 5145
Patent
active
051157780
ABSTRACT:
An apparatus for controlling an internal combustion engine comprises a transducer which detects acoustic emissions generated by the operation of the engine, and produces an output signal. The output signal is amplified, rectified and enveloped to produce an electrical signal. The electrical signal has its direct current component removed to leave the alternating current component of the electrical signal. The AC component of the electrical signal is rectified by a rectifier and the mean level of the AC component of the electrical signal is measured by a measurer. An analyzer monitors the mean level of the AC component of the electrical signal and sends a feedback signal to an ignition timing device of the internal combustion engine. The analyzer sends feedback signals such that the mean value of the AC component of the electrical signal lies in the region of a positive peak prior to the occurrence of preignition.
REFERENCES:
patent: 4346586 (1982-08-01), Furrey
patent: 4640250 (1987-02-01), Hosaka et al.
patent: 4710881 (1987-12-01), Mouri et al.
patent: 4802454 (1989-02-01), Tanaka
patent: 4840158 (1989-06-01), Komurasaki
Argenbright Tony M.
Stresswave Technology Limited
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