Exhaust opacity measuring device

Details Exhaust opacity measuring device Exhaust opacity measuring device

2007-09-25

2007-09-25

Wachsman, Hal (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Chemical analysis

C073S023360

Reexamination Certificate

active

11269822

ABSTRACT:
A remote emissions sensing system and method for sensing exhaust emissions from motor vehicles is provided where the system determines the opacity of an exhaust plume. The system comprises a radiation source that emits radiation which is passed through the exhaust plume of a motor vehicle to one or more detectors arranged to receive the radiation. Multiple wavelength opacity measuring embodiments and monochromatic wavelength opacity measuring embodiments are disclosed.

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Stedman, Donald, et al., “On-Road CO, HC, NO and Opacity Measurements”,7thCRC On-Road Vehicle Emissions Workshop, Apr. 9-11, 1997, pp. 8-25 and 8-27 to 8-33.

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