US Patent No: 6,615,577
Number of patents in Portfolio can not be more than 2000
Method and system for controlling a regeneration cycle of an emission control device
Stats
-
Sep 9, 2003
Issued date -
Jun 19, 2001
filing date -
09/884,248
serial no -
Expired
status
Importance
Loading Importance Indicators...
Abstract
A system and method for optimizing the regeneration cycle of an emission control device, such as a lean NO.sub.x trap, is disclosed wherein the device is filled to a predetermined fraction of its existing capacity and is then completely emptied during a device purge. As device capacity is substantially reduced, as indicated by the actual fill time becoming equal to or less than a predetermined minimum fill time, a device desulfation event is performed to attempt to restore device capacity. A programmed computer controls the fill and purge times based on the amplitude of the voltage of a switching-type oxygen sensor and the time response of the sensor. The frequency of the purge, which ideally is directly related to the device capacity depletion rate, is controlled so that the device is not filled beyond the storage capacity limit.
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 |
|---|---|---|---|
|
|
|||
| 4,964,272 Air-fuel ratio feedback control system including at least downstreamside air-fuel ratio sensor | 56 | 1988 | |
| 5,088,281 Method and apparatus for determining deterioration of three-way catalysts in double air-fuel ratio sensor system | 78 | 1989 | |
| 5,270,024 Process for reducing nitrogen oxides from exhaust gas | 89 | 1990 | |
| 5,331,809 Exhaust gas purification system for an internal combustion engine | 84 | 1990 | |
| 5,189,876 Exhaust gas purification system for an internal combustion engine | 93 | 1991 | |
| 5,233,830 Exhaust gas purification system for an internal combustion engine | 93 | 1991 | |
| 5,174,111 Exhaust gas purification system for an internal combustion engine | 75 | 1991 | |
| 5,165,230 Apparatus for determining deterioration of three-way catalyst of internal combustion engine | 67 | 1991 | |
| 5,201,802 Exhaust gas purification system for an internal combustion engine | 125 | 1992 | |
| 5,209,061 Exhaust gas purification system for an internal combustion engine | 81 | 1992 | |
| 5,412,946 NOx decreasing apparatus for an internal combustion engine | 149 | 1992 | |
| 5,473,887 Exhaust purification device of internal combustion engine | 154 | 1993 | |
| 5,402,641 Exhaust gas purification apparatus for an internal combustion engine | 127 | 1993 | |
| 5,433,074 Exhaust gas purification device for an engine | 82 | 1993 | |
| 5,412,945 Exhaust purification device of an internal combustion engine | 86 | 1993 | |
| 5,423,181 Exhaust gas purification device of an engine | 69 | 1993 | |
| 5,377,484 Device for detecting deterioration of a catalytic converter for an engine | 85 | 1993 | |
| 5,437,153 Exhaust purification device of internal combustion engine | 129 | 1994 | |
| 5,450,722 Exhaust purification device of internal combustion engine | 68 | 1994 | |
| 5,448,887 Exhaust gas purification device for an engine | 80 | 1994 | |
| 5,473,890 Exhaust purification device of internal combustion engine | 107 | 1994 | |
| 5,483,795 Exhaust purification device of internal combustion engine | 99 | 1994 | |
| 5,472,673 Exhaust gas purification device for an engine | 101 | 1994 | |
| 5,551,231 Engine exhaust gas purification device | 96 | 1994 | |
| 5,577,382 Exhaust purification device of internal combustion engine | 89 | 1995 | |
| 5,746,052 Exhaust gas purification device for an engine | 86 | 1995 | |
| 5,740,669 Exhaust gas purification device for an engine | 90 | 1995 | |
| 5,732,554 Exhaust gas purification device for an internal combustion engine | 103 | 1996 | |
| 5,715,679 Exhaust purification device of an engine | 83 | 1996 | |
| 5,735,119 Exhaust purification device of an engine | 78 | 1996 | |
| 5,713,199 Device for detecting deterioration of NO.sub.x absorbent | 97 | 1996 | |
| 5,743,086 Device for judging deterioration of catalyst of engine | 26 | 1996 | |
| 5,737,917 Device for judging deterioration of catalyst of engine | 20 | 1996 | |
| 5,974,793 Exhaust gas purification device for an internal combustion engine | 103 | 1997 | |
| 5,752,492 Apparatus for controlling the air-fuel ratio in an internal combustion engine | 65 | 1997 | |
| 5,996,338 Exhaust gas purifying device for engine | 80 | 1997 | |
| 5,934,072 Exhaust gas purifying device for engine | 32 | 1998 | |
| 5,974,791 Exhaust gas purification device for an internal combustion engine | 186 | 1998 | |
| 5,974,794 Exhaust gas purification device for an internal combustion engine | 38 | 1998 | |
| 5,865,027 Device for determining the abnormal degree of deterioration of a catalyst | 60 | 1998 | |
| 5,979,161 Device for determining the abnormal degree of deterioration of a catalyst | 26 | 1998 | |
| 6,058,700 Device for purifying exhaust gas of engine | 99 | 1998 | |
| 6,014,859 Device for purifying exhaust gas of engine | 112 | 1998 | |
| 5,970,707 Exhaust gas purification device for an internal combustion engine | 93 | 1998 | |
| 6,138,453 Exhaust gas purification device for an internal combustion engine | 46 | 1998 | |
| 6,205,773 Exhaust gas purification device for an internal combustion engine | 42 | 1999 | |
| 6,233,925 Exhaust discharge control device for internal combustion engine | 37 | 1999 | |
|
|
|||
| 5,359,852 Air fuel ratio feedback control | 41 | 1993 | |
| 5,419,122 Detection of catalytic converter operability by light-off time determination | 79 | 1993 | |
| 5,414,994 Method and apparatus to limit a midbed temperature of a catalytic converter | 123 | 1994 | |
| 5,626,117 Electronic ignition system with modulated cylinder-to-cylinder timing | 66 | 1994 | |
| 5,452,576 Air/fuel control with on-board emission measurement | 93 | 1994 | |
| 5,626,014 Catalyst monitor based on a thermal power model | 108 | 1995 | |
| 5,598,703 Air/fuel control system for an internal combustion engine | 62 | 1995 | |
| 5,743,084 Method for monitoring the performance of a no.sub.x trap | 101 | 1996 | |
| 5,771,685 Method for monitoring the performance of a NO.sub.x trap | 108 | 1996 | |
| 5,722,236 Adaptive exhaust temperature estimation and control | 99 | 1996 | |
| 5,746,049 Method and apparatus for estimating and controlling no x trap temperature | 82 | 1996 | |
| 5,832,722 Method and apparatus for maintaining catalyst efficiency of a NO.sub.x trap | 93 | 1997 | |
| 5,778,666 Method and apparatus for improving engine fuel economy | 100 | 1997 | |
| 5,974,788 Method and apparatus for desulfating a no.sub.x trap | 151 | 1997 | |
| 5,983,627 Closed loop control for desulfating a NO.sub.x trap | 89 | 1997 | |
| 5,910,096 Temperature control system for emission device coupled to direct injection engines | 49 | 1997 | |
| 5,877,413 Sensor calibration for catalyst deterioration detection | 29 | 1998 | |
| 6,023,929 Engine with cylinder deactivation | 154 | 1998 | |
| 6,079,204 Torque control for direct injected engines using a supplemental torque apparatus | 52 | 1998 | |
| 6,199,373 Method and apparatus for desulfating a NOx trap | 39 | 1999 | |
|
|
|||
| 5,325,664 System for determining deterioration of catalysts of internal combustion engines | 100 | 1992 | |
| 5,544,482 Exhaust gas-purifying system for internal combustion engines | 78 | 1995 | |
| 5,803,048 System and method for controlling air-fuel ratio in internal combustion engine | 63 | 1995 | |
| 5,655,363 Air-fuel ratio control system for internal combustion engines | 74 | 1995 | |
| 5,724,808 Air-fuel ratio control system for internal combustion engines | 79 | 1996 | |
| 6,012,428 Method for controlling air-fuel ratio in internal combustion engine | 67 | 1997 | |
| 5,966,930 Catalyst deterioration-determining system for internal combustion engines | 45 | 1997 | |
| 6,003,308 Air-fuel ratio control system for internal combustion engines | 30 | 1997 | |
| 6,092,369 Catalyst deterioration-determining system for internal combustion engines using compressed natural gas | 26 | 1998 | |
| 6,128,899 Exhaust gas purification system for internal combustion engine | 38 | 1999 | |
|
|
|||
| 5,009,210 Air/fuel ratio feedback control system for lean combustion engine | 66 | 1987 | |
| 4,913,122 Air-fuel ratio control system | 71 | 1988 | |
| 5,729,971 Engine catalyst temperature estimating device and catalyst diagnostic device | 35 | 1996 | |
| 6,101,809 Exhaust gas purifying system of internal combustion engine | 32 | 1998 | |
| 6,148,611 Engine air-fuel ratio controller and control method | 27 | 1999 | |
| 6,237,330 Exhaust purification device for internal combustion engine | 89 | 1999 | |
| 6,145,305 System and method for diagnosing deterioration of NOx-occluded catalyst | 25 | 1999 | |
| 6,233,923 Exhaust emission control device of internal combustion engine | 25 | 2000 | |
|
|
|||
| 5,693,877 Evaluating method for NO.sub.x eliminating catalyst, an evaluating apparatus therefor, and an efficiency controlling method therefor | 76 | 1994 | |
| 5,802,843 Method and apparatus for diagnosing engine exhaust gas purification system | 72 | 1995 | |
| 5,617,722 Exhaust control device of internal combustion engine | 29 | 1995 | |
| 5,867,983 Control system for internal combustion engine with enhancement of purification performance of catalytic converter | 31 | 1996 | |
| 5,813,387 Change gear control device using acceleration and gear ratio as parameters for automatic transmission in a motor vehicle and the method therefor | 21 | 1996 | |
| 5,979,404 Output torque control apparatus and method for an internal combustion engine | 24 | 1997 | |
|
|
|||
| 5,267,439 Method and arrangement for checking the aging condition of a catalyzer | 62 | 1991 | |
| 5,335,538 Method and arrangement for determining the storage capacity of a catalytic converter | 92 | 1992 | |
| 6,119,449 Internal combustion engine and method of operating the same | 28 | 1998 | |
| 6,216,448 Method of diagnosing an NOX storage catalytic converter during operation of an internal combustion engine | 40 | 1999 | |
| 6,216,451 Method of diagnosing an NOx storage catalytic converter during operation of an internal combustion engine | 30 | 1999 | |
| 6,161,428 Method and apparatus for evaluating the conversion capability of a catalytic converter | 26 | 1999 | |
|
|
|||
| 4,251,989 Air-fuel ratio control system | 92 | 1979 | |
| 4,677,955 Method and apparatus for discriminating operativeness/inoperativeness of an air-fuel ratio sensor | 26 | 1985 | |
| 5,097,700 Apparatus for judging catalyst of catalytic converter in internal combustion engine | 76 | 1991 | |
| 5,622,047 Method and apparatus for detecting saturation gas amount absorbed by catalytic converter | 67 | 1994 | |
| 5,806,306 Deterioration monitoring apparatus for an exhaust system of an internal combustion engine | 20 | 1996 | |
|
|
|||
| 5,953,907 Method of controlling an engine exhaust gas system and method of detecting deterioration of catalyst/adsorbing means | 53 | 1997 | |
| 6,012,282 Method for controlling engine exhaust gas system | 51 | 1997 | |
| 6,026,640 Method of controlling an engine exhaust gas system and method of detecting deterioration of catalyst/adsorbing means | 34 | 1999 | |
| 6,134,883 Method of controlling an engine exhaust gas system and method of detecting deterioration of catalyst/adsorbing means | 64 | 1999 | |
|
|
|||
| 5,862,661 Method for monitoring catalytic converter efficiency | 23 | 1997 | |
| 5,938,715 Method for monitoring the conversion capacity of a catalytic converter | 75 | 1998 | |
| 6,145,302 Method for monitoring a catalytic converter | 44 | 1998 | |
|
|
|||
| 6,073,440 System for detecting deterioration of catalyst for purifying exhaust gas | 40 | 1997 | |
| 6,148,612 Engine exhaust gas control system having NOx catalyst | 39 | 1998 | |
| 6,244,046 Engine exhaust purification system and method having NOx occluding and reducing catalyst | 47 | 1999 | |
|
|
|||
| 5,531,972 Staged three-way conversion catalyst and method of using the same | 30 | 1991 | |
| 5,792,436 Method for using a regenerable catalyzed trap | 87 | 1996 | |
| 6,105,365 Apparatus, method, and system for concentrating adsorbable pollutants and abatement thereof | 91 | 1997 | |
|
|
|||
| 4,884,066 Deterioration detector system for catalyst in use for emission gas purifier | 77 | 1987 | |
| 5,357,750 Method for detecting deterioration of catalyst and measuring conversion efficiency thereof with an air/fuel ratio sensor | 66 | 1993 | |
| 6,214,207 Method and apparatus for measuring oxygen concentration and nitrogen oxide concentration | 39 | 1997 | |
|
|
|||
| 5,595,060 Apparatus and method for internal-combustion engine control | 117 | 1995 | |
| 5,657,625 Apparatus and method for internal combustion engine control | 156 | 1995 | |
|
|
|||
| 5,842,339 Method for monitoring the performance of a catalytic converter | 47 | 1997 | |
| 5,842,340 Method for controlling the level of oxygen stored by a catalyst within a catalytic converter | 122 | 1997 | |
|
|
|||
| 6,164,064 Method and arrangement for desulfurization of NOx reservoir catalysts | 30 | 1998 | |
| 5,992,142 No exhaust emission control method and arrangement | 80 | 1999 | |
|
|
|||
| 6,189,523 Method and system for controlling an air-to-fuel ratio in a non-stoichiometric power governed gaseous-fueled stationary internal combustion engine | 36 | 1999 | |
|
|
|||
| 4,533,900 Service-interval display for motor vehicles | 76 | 1982 | |
|
|
|||
| 5,771,686 Method and apparatus for operating a diesel engine | 104 | 1996 | |
|
|
|||
| 4,622,809 Method and apparatus for monitoring and adjusting .lambda.-probe-controlled catalytic exhaust gas emission control systems of internal combustion engines | 113 | 1985 | |
|
|
|||
| 5,831,267 Method and apparatus for remote measurement of exhaust gas | 63 | 1997 | |
|
|
|||
| 6,202,406 Method and apparatus for catalyst temperature control | 38 | 1999 | |
|
|
|||
| 6,092,021 Fuel use efficiency system for a vehicle for assisting the driver to improve fuel economy | 77 | 1997 | |
|
|
|||
| 5,554,269 No.sub.x sensor using electrochemical reactions and differential pulse voltammetry (DPV) | 30 | 1995 | |
|
|
|||
| 5,426,934 Engine and emission monitoring and control system utilizing gas sensors | 87 | 1993 | |
|
|
|||
| 6,161,378 Exhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas internal combustion engine | 49 | 1998 | |
|
|
|||
| 5,929,320 Apparatus and method for judging deterioration of catalysts device and oxygen content sensing device | 24 | 1996 | |
|
|
|||
| 5,410,873 Apparatus for diminishing nitrogen oxides | 94 | 1993 | |
|
|
|||
| 5,272,871 Method and apparatus for reducing nitrogen oxides from internal combustion engine | 139 | 1992 | |
|
|
|||
| 5,222,471 Emission control system for an internal combustion engine | 65 | 1992 | |
|
|
|||
| 4,854,123 Method for removal of nitrogen oxides from exhaust gas of diesel engine | 99 | 1988 | |
|
|
|||
| 5,448,886 Catalyst deterioration-determining device for an internal combustion engine | 24 | 1993 | |
|
|
|||
| 6,102,019 Advanced intelligent fuel control system | 21 | 1999 | |
|
|
|||
| 4,186,296 Vehicle energy conservation indicating device and process for use | 18 | 1977 | |
| 5,569,848 System, method and apparatus for monitoring tire inflation pressure in a vehicle tire and wheel assembly | 77 | 1995 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 9, 2015 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| 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 |