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 6):
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, in the second deterioration degree estimation control, estimate a degree of total deterioration of the exhaust purification catalyst, based on an amount of oxygen stored in the exhaust purification catalyst from when an output air-fuel ratio of the air-fuel ratio sensor is a rich judged air-fuel ratio richer than the stoichiometric air-fuel ratio or less to when the output air-fuel ratio becomes a lean judged air-fuel ratio leaner than the stoichiometric air-fuel ratio or a value of a parameter changing in accordance with that amount of oxygen, or based on an amount of oxygen released from the exhaust purification catalyst from when an output air-fuel ratio of the air-fuel ratio sensor is a lean judged air-fuel ratio or more to when the output air-fuel ratio becomes a rich judged air-fuel ratio or less or a value of a parameter changing in accordance with that amount of oxygen.

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): 0.7854444458499492
- 35 USC 102 Novelty (BERT): 0.5795978915717506
- Combined Prediction Score: 0.7648597904221294
- Mean Citation Score: 503.1625340000001
- Max Citation Score: 520.6789
- Similarity Product: 432.89149454583526

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