Title:
VACUUM DEGREE ESTIMATION SYSTEM OF DOUBLE-TUBE SYSTEM, INTERNAL COMBUSTION ENGINE, AND VACUUM DEGREE ESTIMATION METHOD OF DOUBLE-TUBE STRUCTURE
Document Type and Number:
Japanese Patent JP2016133326
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a vacuum degree estimation system of a double-tube structure, an internal combustion engine, and a vacuum degree estimation method of the double-tube structure which can easily determine a vacuum degree of a vacuum state in a double-tube structure which creates a vacuum state between an outer tube and an inner tube of the double-tube in which a fluid can be made to flow.SOLUTION: A vacuum degree estimation system 10 of a double-tube structure creates a vacuum state between an outer tube 21 and an inner tube 22 of a double-tube 20 in which a fluid is made to flow inside an inner tube 22, and includes: temperature measurement means 31 for measuring a temperature T of a fluid made to flow in the inner part of the inner tube 21; and vacuum degree estimation means 32 for estimating a temperature difference ΔT between an inlet side temperature Ti and an outlet side temperature To of the double-tube structure of the fluid measured by this temperature measurement means 31 or estimating the degree of vacuum from the outlet side temperature To of this fluid.SELECTED DRAWING: Figure 1
Inventors:
OSADA HIDEKI
IIJIMA AKIRA
IIJIMA AKIRA
Application Number:
JP2015006430A
Publication Date:
July 25, 2016
Filing Date:
January 16, 2015
Export Citation:
Assignee:
ISUZU MOTORS LTD
International Classes:
G01L21/10; F01N3/00; F01N3/18; F01N3/20; F01N13/08; F01N13/14
Attorney, Agent or Firm:
Seiryu International Patent Service Corporation
Takayoshi in the daytime
Masao Sakaizawa
Isao Hirai
Takayoshi in the daytime
Masao Sakaizawa
Isao Hirai
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