PATENT CLAIM ANALYSIS

Application Number: 15863032
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2019-07
Patent Classification: ["060", "274000"]

Abstract:
An exhaust after-treatment system has a DEF system with improved DEF purge cycling during which time DEF is returned to a DEF storage tank. The DEF system adapts its methodology based on a condition within the DEF system. A purge valve may be arranged in a doser feed line between a DEF supply module and a DEF doser module. A purging control system may be configured to control the purge valve based on detected states within the DEF system, such as a detected state that corresponds to a plugged DEF doser module. If a plugged doser module is detected, the purge valve may be opened to vent the doser module feed line to atmosphere which allows the DEF to be returned to the DEF storage tank without creating a siphon effect that could draw additional DEF from the DEF storage tank into the supply module.

Claim (Index 11):
A method of treating exhaust from an internal combustion engine of an agricultural vehicle, the method comprising:\n monitoring NOx (nitrogen oxides) levels in an exhaust system downstream of a diesel engine while the engine is running; delivering DEF (diesel exhaust fluid) into the exhaust system through a DEF delivery system having a doser module that directs the DEF into the exhaust system based on detected values of the NOx levels; turning the engine off; initiating a DEF purge cycle, with the DEF purge cycle including:\n detecting a plugged or unplugged condition of the doser module, wherein, \n if an unplugged condition of the doser module is detected,\n applying a vacuum pressure to the DEF delivery system to withdraw DEF from the DEF delivery system and direct the withdrawn DEF to a DEF storage system; and \n \n if a plugged condition of the doser module is detected,\n venting the DEF system upstream of the doser module, and \n applying a vacuum pressure to the DEF delivery system to withdraw DEF from the DEF delivery system and direct the withdrawn DEF to a DEF storage system.

Metadata:
- Claim Count in Document: 47.0
- Percentile: 86.0
- Lexical Diversity: 2.23529
- Patent Class: 60.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14775126', '14320871', '14935125', '15317052', '14935094']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6869028971725178
- 35 USC 102 Novelty (BERT): 0.4905804137843348
- Combined Prediction Score: 0.6672706488336996
- Mean Citation Score: 228.404192
- Max Citation Score: 243.37967000000003
- Similarity Product: 178.68903475539088

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