NOx occlusion amount estimating device and NOx occlusion amount estimating method
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United States of America Patent
Stats
-
Jun 16, 2020
Grant Date -
Mar 15, 2018
app pub date -
Mar 15, 2016
filing date -
Mar 20, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An exhaust purification system includes a NOx-occlusion-reduction-type catalyst that occludes NOx in exhaust in a lean state and reduces and purifies the occluded NOx in exhaust in a rich state, and a NOx purge rich control unit that executes NOx purge of reducing and purifying the occluded NOx by putting the exhaust into the rich state by fuel injection control, where a catalyst temperature of the NOx-occlusion-reduction-type catalyst is equal to or higher than a catalyst temperature threshold value and a NOx occlusion amount of the NOx-occlusion-reduction-type catalyst is equal to or higher than an NOx occlusion amount threshold value, and executes the NOx purge when the catalyst temperature is lower than a catalyst temperature threshold value.
First Claim
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International Classification(s)
- 2016 Application Filing Year
- G01N Class
- 12375 Applications Filed
- 8515 Patents Issued To-Date
- 68.81 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- G01N Class
- 0 % this patent is cited more than
- 5 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Dec 16, 2027 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 16, 2031 |
