Electricity: measuring and testing – Internal-combustion engine ignition system or device – Ignition timing
Patent
1989-06-29
1990-07-24
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Internal-combustion engine ignition system or device
Ignition timing
324378, 73 35, F02P 1700
Patent
active
049437763
ABSTRACT:
The signal provided by an accelerometric sensor (S) connected to the engine is monitored in two frequency bands (f1, f2) in which peaks indicative of the presence of pinking (knocking) may appear. The intensity of the signal detected in the second band (f2) is compared (3) with the intensity of the signal detected in the first band (f1). The comparison (20) of the detection-signal component (F1 and/or F2) with the noise component (F3), in view of the emission of the pinking signal (21), is carried out in different ways (8, 13, 14) according to the relative ratios between the above intensities.
REFERENCES:
patent: 4364260 (1982-12-01), Chen et al.
patent: 4467634 (1984-08-01), Ronde et al.
patent: 4608855 (1986-09-01), Blauhut
patent: 4637245 (1987-01-01), Iwata et al.
patent: 4640250 (1987-02-01), Hosara et al.
Maloberti Franco
Polito Gino
Eisenzopf Reinhard J.
Marelli Autronica S.p.A.
Mueller Robert W.
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