PATENT CLAIM ANALYSIS

Application Number: 15988400
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-12
Patent Classification: ["060", "295000"]

Abstract:
A method for regenerating a particulate filter in an exhaust system of an internal combustion engine. In a normal operation, the internal combustion engine is operated at a stoichiometric air/fuel ratio. To regenerate the particulate filter, it is provided that the air/fuel ratio be adjusted toward lean, and, at the same time, that the combustion in the combustion chambers of the internal combustion engine be stabilized by suitably adapting the ignition energy, the duration of ignition, and/or the ignition frequency, to prevent misfires and the associated uncontrolled entrainment of unburned fuel into the exhaust system. The inventive method for regenerating the particulate filter makes possible a more rapid and lower-emission regeneration of a particulate filter. Also, an internal combustion engine having an exhaust system and a control unit that is adapted for implementing a method according to the present invention.

Claim (Index 1):
A method for regenerating a particulate filter ( 24 ) or a four-way catalytic converter ( 44 ) in an exhaust system ( 20 ) of an internal combustion engine ( 10 ), comprising the following steps:\n operating the internal combustion engine ( 10 ) at a stoichiometric air/fuel ratio (\u03bb=1), the exhaust gas of the internal combustion engine ( 10 ) being directed through the exhaust system ( 20 ), and the soot particulate contained in the exhaust gas separating out at the surface of the particulate filter ( 24 ) or of the four-way catalytic converter ( 44 ); initiating a regeneration of the particulate filter ( 24 ) or of the four-way catalytic converter ( 44 ) when the particulate filter ( 24 ) or the four-way catalytic converter ( 44 ) has reached or exceeded a stipulated saturation condition; and regenerating the particulate filter ( 24 ), the internal combustion engine ( 10 ) being operated at a leaner than stoichiometric air/fuel ratio (\u03bb>1) and, at the same time, the ignition energy, the duration of ignition, and/or the number of ignitions per combustion cycle being increased to ensure an ignition of the leaner than stoichiometric air/fuel ratio in the combustion chambers ( 14 ) of the internal combustion engine ( 10 ).

Metadata:
- Claim Count in Document: 23.0
- Percentile: 93.0
- Lexical Diversity: 2.05333
- Patent Class: 60.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['12599543', '12239124', '12638633', '13183936', '12638595']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7184854685071984
- 35 USC 102 Novelty (BERT): 0.5153097754644224
- Combined Prediction Score: 0.6981678992029208
- Mean Citation Score: 308.7814860000001
- Max Citation Score: 328.10834
- Similarity Product: 234.2546241231477

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

Dataset: test