Ion current detection device

Details Ion current detection device Ion current detection device

1998-05-13

2000-09-12

Brown, Glenn W.

Electricity: measuring and testing

Using ionization effects

For analysis of gas, vapor, or particles of matter

324380, 324388, 324399, 73 3508, 73116, F02P 1712, G01M 1500, G01N 2762

Patent

active

061182761

ABSTRACT:
An ion current detection device is disclosed that is designed to hold an ion current output voltage within a prescribed limit to ensure proper operation of a processing device connected to the output side thereof, while, at the same time, shortening the decay time of the LC resonance associated with an ignition coil. An ion current flows from one end of a capacitor and back to the other end thereof passing through an ignition coil secondary winding, a spark plug, an ion current detecting resistor, and a load resistor. A voltage equal to -(ion current value).times.detecting resistor value appears at a node between the ion current detecting resistor and the load resistor. This voltage is inverted by an inverting circuit and supplied as an ion current output to the processing circuit. The resistance value R1 of the ion current detecting resistor and the resistance value R2 of the load resistor are chosen to satisfy two requirements, that is, to hold the ion current output within supply voltage and to quickly attenuate and reduce the noise (LC resonance current) caused by the ignition coil.

REFERENCES:
patent: 4444172 (1984-04-01), Sellmaier et al.
patent: 5230240 (1993-07-01), Ohsawa et al.
patent: 5337716 (1994-08-01), Fukui et al.
patent: 5343844 (1994-09-01), Fukui et al.
patent: 5483818 (1996-01-01), Brandt et al.
patent: 5548220 (1996-08-01), Kawamoto et al.
patent: 5561239 (1996-10-01), Yasuda
patent: 5563332 (1996-10-01), Yasuda
patent: 5675072 (1997-10-01), Yasuda et al.
patent: 5781012 (1998-07-01), Yasuda
patent: 5866808 (1999-02-01), Ooyabu et al.
patent: 5959192 (1999-09-01), Mogi et al.

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