PATENT CLAIM ANALYSIS

Application Number: 15781877
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2018-12
Patent Classification: ["060", "598000"]

Abstract:
A method of detecting surging in a turbocharger provided for an internal combustion engine, includes: a first characteristic quantity calculation step of calculating a first characteristic quantity in at least one first frequency region corresponding to at least one first peak frequency component unique to the time of occurrence of surging in the turbocharger on the basis of a time-variable waveform indicating a time-series change of a rotation speed of the turbocharger; a second characteristic quantity calculation step of calculating a second characteristic quantity in a second frequency region including the at least one first frequency region on the basis of the time-variable waveform; and a detection step of detecting surging in the turbocharger on the basis of a relationship between the first characteristic quantity and the second characteristic quantity. The second frequency region further includes at least one second peak frequency unique to the time of acceleration and deceleration of the internal combustion engine from among frequency components different from the at least one first peak frequency component.

Claim (Index 2):
The method of detecting surging in a turbocharger according to  claim 1 ,\n wherein the first characteristic quantity calculation step includes obtaining, as the first characteristic quantity, a square value of a first amplitude of a frequency component included in the first frequency region from the time-variable waveform for each point of time, and calculating a first waveform obtained by smoothing a time change of the square value of the first amplitude by moving average calculation, wherein the second characteristic quantity calculation step includes obtaining, as the second characteristic quantity, a square value of a second amplitude of a frequency component included in the second frequency region from the time-variable waveform for each point of time, and calculating a second waveform obtained by smoothing a time change of the square value of the second amplitude by moving average calculation, and wherein the detection step includes calculating a ratio between an instantaneous amplitude of the first waveform and an instantaneous amplitude of the second waveform at each point of time as an instantaneous amplitude ratio at each point of time, and determining that surging is occurring in a time section where the instantaneous amplitude ratio is not smaller than a predetermined threshold.

Metadata:
- Claim Count in Document: 9.0
- Percentile: 94.0
- Lexical Diversity: 2.86885
- Patent Class: 60.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['15781864', '11878117', '12142411', '15025466', '11072397']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.734605775180674
- 35 USC 102 Novelty (BERT): 0.4762591425975968
- Combined Prediction Score: 0.7087711119223664
- Mean Citation Score: 183.7171
- Max Citation Score: 198.99602
- Similarity Product: 141.51503327397586

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

Dataset: test