PATENT CLAIM ANALYSIS

Application Number: 16064748
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2018-12
Patent Classification: ["123", "575000"]

Abstract:
An example method for operating an internal combustion engine may include: measuring pressure oscillations for a cylinder in the inlet tract at a defined operating point during normal operation; generating a corresponding oscillation signal; determining a crankshaft phase angle corresponding to the oscillation signal; and from the pressure oscillation signal, using discrete Fourier transformation to calculate the actual phase position of a selected signal frequency; determining a further comparison phase position in the same way from the selected signal frequency in the absence of fuel injection; calculating an actual phase position difference; on the basis of the difference, taking into consideration reference phase position differences of the same signal frequency for different fuel compositions, to identify a fuel composition of the presently used fuel; and adapting operating parameters of the engine based on the identified composition.

Claim (Index 1):
A method for operating an internal combustion engine, the method comprising:\n measuring dynamic pressure oscillations assignable to a cylinder of the internal combustion engine in the inlet tract of the respective internal combustion engine at a defined operating point during intake-synchronous fuel injection during normal operation; generating a corresponding pressure oscillation signal based at least in part on the measured pressure oscillations; determining a crankshaft phase angle signal corresponding to the pressure oscillation signal; and from the pressure oscillation signal, using discrete Fourier transformation, calculating the actual phase position of a selected signal frequency of the measured pressure oscillations in relation to the crankshaft phase angle signal; determining a further comparison phase position in the same way from the selected signal frequency in the absence of fuel injection or in the case of direct fuel injection into the closed combustion chamber, in addition to the determined actual phase position of the selected signal frequency in the case of intake-synchronous fuel injection; calculating an actual phase position difference between the actual phase position and comparison phase position; on the basis of the determined actual phase position difference, taking into consideration reference phase position differences of the same signal frequency for different fuel compositions, to identify a fuel composition of the presently used fuel; and adapting operating parameters of the internal combustion engine based on the identified fuel composition.

Metadata:
- Claim Count in Document: 35.0
- Percentile: 94.0
- Lexical Diversity: 1.92208
- Patent Class: 123.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16064551', '16064842', '15775350', '15319090', '11885026']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7284927634155745
- 35 USC 102 Novelty (BERT): 0.5386551534831078
- Combined Prediction Score: 0.7095090024223277
- Mean Citation Score: 318.7055900000001
- Max Citation Score: 393.94373
- Similarity Product: 385.8780725445992

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