PATENT CLAIM ANALYSIS

Application Number: 16108667
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2019-03
Patent Classification: ["422", "168000"]

Abstract:
An exhaust purification device of an engine includes: an exhaust passage; a urea injector supplying urea water into the exhaust passage; a pump device which supplies urea water stored in a urea tank to the urea injector, the pump device capable of performing an operation of recovering the urea water supplied to the urea injector to the urea tank; an SCR catalyst which purifies the exhaust gas using urea; and a controller. The controller controls the pump device such that the supply of the urea water to the urea injector is stopped, and a recovery operation for recovering the urea water in the urea injector to the urea tank is performed in a case where an amount of ammonium adsorbed by the SCR catalyst is larger than a predetermined reference adsorption amount under a condition where an internal temperature of the urea injector reaches a predetermined high temperature.

Claim (Index 7):
The exhaust purification device of an engine according to  claim 1 , wherein\n the controller is configured to obtain an amount of ammonium adsorbed by the SCR catalyst by performing: a first arithmetic operation for obtaining an ammonium supply amount obtained based on an injection history of urea water injected from the urea injector and an ammonium consumption amount consumed by the SCR catalyst; a second arithmetic operation for calculating an amount of ammonium accumulated in the SCR catalyst by subtracting the ammonium consumption amount from the ammonium supply amount; and a third arithmetic operation for calculating an amount of ammonium adsorbed by the SCR catalyst by integrating amounts of ammonium accumulated at respective point of times.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 96.0
- Lexical Diversity: 2.37879
- Patent Class: 422.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['16108699', '12741387', '16002744', '15650261', '15826468']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8409755977555855
- 35 USC 102 Novelty (BERT): 0.5098734980613454
- Combined Prediction Score: 0.8078653877861615
- Mean Citation Score: 296.53500999999994
- Max Citation Score: 332.6569
- Similarity Product: 255.3845542302549

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