US Patent No: 8,181,447
Number of patents in Portfolio can not be more than 2000
Exhaust gas purification device
Stats
-
May 22, 2012
Issued date -
Aug 28, 2006
filing date -
12/065,237
serial no -
In Force
status
Importance
Loading Importance Indicators...
Abstract
An ECU corrects a fuel addition interval, based on an amount of change between an exhaust gas temperature at present and a basic exhaust gas temperature obtained when a basic addition interval is set, to reduce the fuel addition interval with an increase in the amount of change in the exhaust gas temperature. With such correction of the addition interval, when the exhaust gas temperature is increased in a highland region or the like, the fuel addition interval is corrected to be reduced and an fuel addition amount is corrected to be increased according to the increase in the exhaust gas temperature. Thereby, an increase in a temperature at a tip portion of a fuel addition valve can be suppressed, and thus clogging of an ejection hole of the fuel addition valve with deposits can be avoided.
Loading the Abstract Image...
First Claim
Related Publications
Loading Related Publications...
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
|
|
|||
| 5,537,321 Diagnostic apparatus for controlling the operation of a catalytic converter | 17 | 1993 | |
| 5,842,341 Exhaust emission purification apparatus for an internal combustion engine | 48 | 1997 | |
|
|
|||
| 6,119,448 Method for metering a reducing agent into NO.sub.x -containing exhaust gas of an internal combustion engine | 72 | 1998 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Nov 22, 2015 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Nov 22, 2019 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Nov 22, 2023 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 3.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |