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 8):
An exhaust purification device of an engine comprising:\n an exhaust passage through which an exhaust gas discharged from an engine body flows; a urea injector which supplies urea water into the exhaust passage; a urea tank for storing the urea water; a supply pipe connecting the urea injector and the urea tank to each other; a pressurizing pump incorporated in the supply pipe, the pressurizing pump capable of supplying the urea water stored in the urea tank to the urea injector by generating a predetermined pressurizing force, and capable of performing an operation of recovering the urea water supplied to the urea injector to the urea tank when the pressurizing force is stopped; an SCR catalyst which is disposed in the exhaust passage downstream of the urea injector and purifies NOx in the exhaust gas by a reduction action of ammonium generated from urea; and a controller for controlling an operation of the urea injector and an operation of the pump device, wherein the controller is configured to control the pressurizing pump 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 target adsorption amount which is set such that the amount of ammonium adsorbed by the SCR catalyst becomes smaller as a temperature of the SCR catalyst is higher under a condition where an internal temperature of the urea injector reaches a temperature immediately before the urea water is boiled.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 96.0
- Lexical Diversity: 2.37879
- Patent Class: 422.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16108699', '12741387', '16002744', '15650261', '15826468']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.824427141663397
- 35 USC 102 Novelty (BERT): 0.5062535204145422
- Combined Prediction Score: 0.7926097795385116
- Mean Citation Score: 296.53500999999994
- Max Citation Score: 332.6569
- Similarity Product: 269.81593169125915

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