Apparatus for measuring the soot particles contained in the exha

Details Apparatus for measuring the soot particles contained in the exha Apparatus for measuring the soot particles contained in the exha

1986-12-09

1990-04-10

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Determining nonelectric properties by measuring electric...

Particle counting

324464, 73 28, G01N 2762, G01N 1500

Patent

active

049163841

ABSTRACT:
An apparatus and method for providing a continuous and precise measurement of the number of soot particles emitted in the exhaust gas of a diesel engine. A pair of electrodes is provided in the exhaust gas flow and a voltage is applied across the electrodes so as to develop an electrical current across the electrodes indicative of the conductivity, and therefore the quantity, of the soot particles in the exhaust gas. In accordance with one embodiment of the invention, the electrodes are located in a diluting conduit provided with a pump for providing a constant volume of diluted exhaust gas between the electrodes. In accordance with another embodiment of the invention, the electrodes are located in the exhaust pipe of the diesel engine.

REFERENCES:
patent: 3679973 (1972-07-01), Smith, Jr. et al.
patent: 4361028 (1982-11-01), Kamiya et al.
patent: 4531402 (1985-07-01), Reif et al.
patent: 4565969 (1986-01-01), Olson et al.

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