Back to results
US 5,813,764 AGranted
Catalytic differential calorimetric gas sensor
AssigneeFord Global Technologies, LLC
InventorsJacobus Hendrik Visser, Chaitanya Kumar Narula, Margherita Zanini-Fisher
Life of this patent
Estimating the term…
Abstract
A catalytic differential gas combustible microcalorimeter sensor for monitoring the exhaust gas conversion for monitoring the exhaust gas conversion efficiency of a catalytic converter. The catalytic calorimetric sensor disclosed includes a sol-gel processed washcoat and sol-processed catalytically active metal particles. Sol-gel processing creates a washcoat with high surface area and controlled porosity which increases the sensitivity, durability, and reproducibility of the resultant sensor.
Claims5
A differential gas combustible microcalorimeter sensor comprising:
- a substrate which comprises:
- a silicon frame,
- a first reference membrane disposed on said silicon frame, and
- a second membrane disposed on said silicon frame, said second membrane being positioned such that said second membrane is thermally isolated from said first reference membrane;
- a first and second temperature measuring devices, the first temperature measuring device being disposed on said first reference membrane and the second temperature measuring device being disposed on said second membrane;
- and
- a sol-gel processed catalytic layer disposed on said second temperature measuring device, wherein said first and second temperature measuring devices provide a measurement of the additional heat generated by the catalytic layer to provide a means of calculating the temperature fluctuation in a combustible gas that comes into contact with the sensor.
4 more elements
Dependencies are inferred from the claim text.