PATENT CLAIM ANALYSIS

Application Number: 15937623
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2019-04
Patent Classification: ["060", "285000"]

Abstract:
An exhaust purification system comprises an exhaust purification catalyst  20 , an NO X  sensor  46 , air-fuel ratio sensor  41  downstream of the catalyst  20 , and a control and diagnosis device. The device alternately sets a target air-fuel ratio to a rich air-fuel ratio and a lean air-fuel ratio and switches the target air-fuel ratio from the rich air-fuel ratio to the lean air-fuel ratio when the output air-fuel ratio of the air-fuel ratio sensor becomes a rich judged air-fuel ratio or less. The device diagnoses abnormality of the catalyst based on the output of the NO X  sensor. It diagnoses abnormality of the catalyst when the air-fuel ratio of the exhaust gas flowing into the catalyst is a rich air-fuel ratio, but does not diagnose abnormality of the catalyst when the air-fuel ratio of the exhaust gas flowing into the catalyst is a lean air-fuel ratio.

Claim (Index 7):
The exhaust purification system of an internal combustion engine according to  claim 4 , further comprising an air-fuel ratio sensor provided in the exhaust passage at a downstream side of the exhaust purification catalyst in the direction of flow of exhaust,\n wherein the control device is configured to switch the target air-fuel ratio from a rich air-fuel ratio to a lean air-fuel ratio when the air-fuel ratio of exhaust gas detected by the air-fuel ratio sensor becomes equal to or less than a rich judged air-fuel ratio richer than the stoichiometric air-fuel ratio, and wherein the control device is configured to, in the second deterioration degree estimation control, to estimate a degree of total deterioration of the exhaust purification catalyst based on at least part of the behavior of the output air-fuel ratio of the air-fuel ratio sensor after the target air-fuel ratio is switched from the rich air-fuel ratio to the lean air-fuel ratio and before the output air-fuel ratio of the air-fuel ratio sensor reaches the stoichiometric air-fuel ratio.

Metadata:
- Claim Count in Document: 13.0
- Percentile: 90.0
- Lexical Diversity: 2.90566
- Patent Class: 60.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15083449', '15083378', '15329780', '15559086', '15325471']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7824966304821998
- 35 USC 102 Novelty (BERT): 0.5899168183274999
- Combined Prediction Score: 0.7632386492667297
- Mean Citation Score: 503.1625340000001
- Max Citation Score: 520.6789
- Similarity Product: 480.75556717065575

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test