Exhaust emission control system of engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jun 4, 2019
Grant Date -
Jan 18, 2018
app pub date -
Jul 7, 2017
filing date -
Jul 12, 2016
priority date (Note) -
In Force
status (Latency Note)
Importance
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US Family Size
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Non-US Coverage
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Abstract
An exhaust emission control system of an engine is provided, which includes a NOx catalyst disposed in an exhaust passage for storing NOx within exhaust gas when an air-fuel ratio of the exhaust gas is lean, and reducing the stored NOx when the air-fuel ratio is approximately stoichiometric or rich. A processor executes a NOx reduction controlling module for performing, when the NOx stored amount exceeds a given amount, a NOx reduction control in which a fuel injector performs a post injection of fuel to continuously control the air-fuel ratio to a target ratio so that the stored NOx is reduced to be below a given amount, the target air-fuel ratio being a ratio at which the stored NOx is reducible, the post injection causing the injected fuel to combust inside a cylinder, the execution of the control permitted when an engine load is within a medium load range.
First Claim
Other Claims data not available
Family
| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| JP | B2 | JP6331231 | Jul 12, 2016 |
| DE | B4 | DE102017006514 | Jul 10, 2017 |
International Classification(s)
- 2017 Application Filing Year
- F01N Class
- 1339 Applications Filed
- 1000 Patents Issued To-Date
- 74.69 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- F01N Class
- 0 % this patent is cited more than
- 6 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 4, 2026 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 4, 2030 |
