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 2):
The exhaust purification system of an internal combustion engine according to  claim 1 , wherein the control device is configured to diagnose abnormality in the exhaust purification catalyst based on a degree of irreversible deterioration, and diagnose abnormality in the exhaust purification catalyst when the air-fuel ratio of exhaust gas flowing into the exhaust purification catalyst is a rich air-fuel ratio, but not diagnose abnormality in the exhaust purification catalyst when the air-fuel ratio of exhaust gas flowing into the exhaust purification catalyst is a lean air-fuel ratio.

Metadata:
- Claim Count in Document: 13.0
- Percentile: 90.0
- Lexical Diversity: 2.90566
- Patent Class: 60.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15083449', '15083378', '15329780', '15559086', '15325471']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.806723753047077
- 35 USC 102 Novelty (BERT): 0.5745135227496676
- Combined Prediction Score: 0.7835027300173361
- Mean Citation Score: 503.1625340000001
- Max Citation Score: 520.6789
- Similarity Product: 399.0765400752545

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test