PATENT CLAIM ANALYSIS

Application Number: 16405087
Application Type: Utility
Filing Date: 2019-05
Publication Date: 2019-11
Patent Classification: ["422", "168000"]

Abstract:
A purification control device ( 12 ) controls a urea water injector ( 5 ) for supplying urea as a reducing agent to an SCR catalyst ( 4 ). The purification control device ( 12 ) sets a pre-deterioration maximum occlusion amount based on the SCR catalyst temperature, and estimates the concentration of ammonia discharged from the SCR catalyst ( 4 ), as an estimated ammonia concentration, based on upstream NOx concentration information, downstream NOx concentration information, urea injection amount information, the pre-deterioration maximum occlusion amount, and ammonia occlusion amount information. The purification control device ( 12 ) acquires downstream ammonia concentration information. When the downstream ammonia concentration is greater than the estimated ammonia concentration, the purification control device ( 12 ) decreases the supply amount of urea from the urea water injector ( 5 ).

Claim (Index 1):
A purification control device which controls a urea supply device for supplying urea as a reducing agent to a selective reduction catalyst provided in an exhaust pipe of an internal combustion engine in order to purify NOx contained in an exhaust gas discharged from the internal combustion engine, the purification control device comprising:\n a first information acquisition unit configured to acquire at least information that allows an upstream NOx concentration, a downstream NOx concentration, a supplied ammonia amount, and a catalyst temperature to be specified, wherein the upstream NOx concentration is a concentration of NOx contained in the exhaust gas flowing into the selective reduction catalyst, the downstream NOx concentration is a concentration of NOx contained in the exhaust gas discharged from the selective reduction catalyst, the supplied ammonia amount is an amount of ammonia supplied to the selective reduction catalyst, and the catalyst temperature is a temperature of the selective reduction catalyst; an occlusion amount setting unit configured to set a pre-deterioration maximum occlusion amount based on at least the catalyst temperature, wherein the pre-deterioration maximum occlusion amount is a maximum value of an amount of ammonia to be occluded in the selective reduction catalyst before the selective reduction catalyst is deteriorated; an estimation unit configured to estimate a concentration of ammonia discharged from the selective reduction catalyst, as an estimated ammonia concentration, based on at least information that allows the upstream NOx concentration to be specified, information that allows the downstream NOx concentration to be specified, information that allows the supplied ammonia amount to be specified, and the pre-deterioration maximum occlusion amount; a second information acquisition unit configured to acquire information that allows a downstream ammonia concentration to be specified, wherein the downstream ammonia concentration is a concentration of ammonia contained in the exhaust gas discharged from the selective reduction catalyst; and a decreasing unit configured to decrease a supply amount of urea from the urea supply device when the downstream ammonia concentration is greater than the estimated ammonia concentration.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 100.0
- Lexical Diversity: 2.69091
- Patent Class: 422.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15170045', '15170177', '15787984', '12936706', '12917179']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7992070939708158
- 35 USC 102 Novelty (BERT): 0.5470696809612179
- Combined Prediction Score: 0.773993352669856
- Mean Citation Score: 356.48528600000014
- Max Citation Score: 417.83597
- Similarity Product: 385.7403444443488

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

Dataset: test