PATENT CLAIM ANALYSIS

Application Number: 15864719
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-10
Patent Classification: ["073", "040000"]

Abstract:
A leakage detection device for detecting leakage in a positive crankcase ventilation (PCV) passage having at least a scavenging line and a fresh air line includes: a first pressure measurement unit that measures a pressure in the PCV passage; a leakage detection valve that opens and closes the fresh air line; a PCV valve that adjusts a flow rate of blow-by gas; a second pressure measurement unit that measures a pressure in the intake passage; a first valve controller that controls the leakage detection valve when a leakage diagnostic condition is satisfied; a second valve control unit that reduces an opening degree of the PCV valve, and suppresses a flow rate in the PCV passage based on the pressure in the intake manifold after the leakage detection valve is closed; and a leakage determination unit that determines whether leakage occurs based on the pressure in the PCV passage.

Claim (Index 1):
A leakage detection device configured to detect leakage in a positive crankcase ventilation passage, the passage having at least a scavenging line that communicates with a crank chamber of an engine and an intake passage of the engine at a portion downstream of a throttle valve, and a fresh air line that communicates with the crank chamber and the intake passage at a portion of upstream of the throttle valve, the leakage detection device comprising:\n a first pressure measurement configured to measure a pressure in the positive crankcase ventilation passage, a leakage detection valve configured to open and close the fresh air line, a positive crankcase ventilation valve configured to adjust a flow rate of blow-by gas conveyed to the scavenging line from the crank chamber, a second pressure measurement configured to measure a pressure in the intake passage of the engine downstream of the throttle valve, a first valve controller configured to perform control to close the leakage detection valve when a predetermined leakage diagnostic condition is satisfied, a second valve control unit configured to gradually reduce an opening degree of the positive crankcase ventilation valve before the leakage detection valve is closed, and suppress a flow rate in the positive crankcase ventilation passage to a predetermined amount in accordance with the pressure in the intake manifold after the leakage detection valve is closed, and a leakage determination unit configured to determine whether leakage occurs in the positive crankcase ventilation passage on a basis of the pressure in the positive crankcase ventilation passage.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 86.0
- Lexical Diversity: 2.33824
- Patent Class: 73.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15575486', '15738436', '13620021', '14923936', '15133133']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7386996295821898
- 35 USC 102 Novelty (BERT): 0.5079926228575045
- Combined Prediction Score: 0.7156289289097213
- Mean Citation Score: 280.595138
- Max Citation Score: 307.7018
- Similarity Product: 247.49387783178088

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