| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_dc45703f67bc72a6db582867886fd5d5 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F02D41-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F01N3-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F01N3-28 |
| filingDate |
2002-04-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e5a4808bc68b95359a9601d8628860d6
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ac1e0c4b08519c76db4a3f72f2bba049
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f55292cf59374ed8545a54129659fe34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ff51adc0fd8ca25d0faa5d1e3615e9af
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ae5ecce73319a64b801187a2e9531ffc |
| publicationDate |
2003-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-2003314334-A |
| titleOfInvention |
Air-fuel ratio control device for internal combustion engine |
| abstract |
(57) [Problem] To improve the exhaust gas purification performance by performing feedback control of the air-fuel ratio of an engine with an appropriate feedback control gain in consideration of control dead time. The air-fuel ratio control device performs feedback control of the air-fuel ratio based on the outputs of an upstream air-fuel ratio sensor and a downstream air-fuel ratio sensor of a first catalyst provided in an exhaust pipe. Further, the air-fuel ratio control device includes the first catalyst 5 The maximum oxygen storage amount Cmax of No. 3 is obtained, and the feedback control gain in the feedback control of the air-fuel ratio is changed according to the maximum oxygen storage amount Cmax. Since the dead time of the control changes according to the maximum oxygen storage amount Cmax of the first catalyst 53, the feedback control is appropriately performed by determining the feedback control gain as described above, and the air-fuel ratio is overcorrected. It is possible to control the air-fuel ratio downstream of the first catalyst 53 to the target air-fuel ratio with good responsiveness while avoiding oscillating changes. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2012032631-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2008255964-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2012014328-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7415818-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8899019-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102472184-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8230846-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9062622-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102472184-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2012035622-A1 |
| priorityDate |
2002-04-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |