PATENT CLAIM ANALYSIS

Application Number: 15741604
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-07
Patent Classification: ["123", "406190"]

Abstract:
An EGR rate estimation method using an EGR valve opening area involves aggravated EGR rate estimation accuracy as an EGR valve is deteriorated and is unable to satisfy required accuracy when a target EGR rate is high. With a method for correcting a fuel injection amount by a fuel injection valve through estimation of a purge air-fuel ratio on the basis of variations in an air-fuel ratio variable depending on whether purging is performed, the fuel injection correction fails to accommodate the change in the air-fuel ratio when concentration of fuel evaporative emissions adsorbed by an activated carbon of a canister is high, resulting in reduced conversion efficiency of a catalyst. An arrangement includes an introduction port that is disposed in an intake pipe and through which a gas other than fresh air flows in the intake pipe and humidity sensors disposed upstream and downstream, respectively, of the introduction port. The EGR rate or the purge air-fuel ratio in the intake pipe is estimated using detection values of the respective humidity sensors.

Claim (Index 4):
The control apparatus for an internal combustion engine according to  claim 3 , wherein the EGR rate in the intake pipe is estimated using volume fractions of water vapor upstream and downstream, respectively, of the connection of the intake pipe and a volume fraction of water vapor in the exhaust gas.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 86.0
- Lexical Diversity: 1.97802
- Patent Class: 123.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['13146563', '16066807', '15528970', '15260170', '14284904']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7892206366862855
- 35 USC 102 Novelty (BERT): 0.4978659515559217
- Combined Prediction Score: 0.7600851681732491
- Mean Citation Score: 301.644048
- Max Citation Score: 307.2668
- Similarity Product: 262.73914480559824

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