Title:
COOLING DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2020118118
Kind Code:
A
Abstract:
To provide a cooling device for an internal combustion engine capable of estimating durability of a control valve.SOLUTION: A cooling device 20 comprises: a drive time stress calculation section 62 which calculates drive time stress that a gear undergoes when displacing a valve body with driving force of a motor 37 on a control valve 26; a stress with rapid speed reduction calculation section 59 which calculates stress with rapid speed reduction, the stress that the gear undergoes due to a rapid reduction in a displacement speed of the valve body, when the valve body is determined to undergo the rapid reduction in the displacement speed; and a durability estimation section 60 which estimates durability of the control valve 26 on the basis of: a product of either one of the drive time stress or the stress with rapid speed reduction and an equivalent transformation coefficient; and the other stress thereof.SELECTED DRAWING: Figure 1
Inventors:
FURUYA KEIHIRO
Application Number:
JP2019011412A
Publication Date:
August 06, 2020
Filing Date:
January 25, 2019
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F01P7/16; F16K37/00; H02P29/032
Attorney, Agent or Firm:
Makoto Onda
Hironobu Onda
Hironobu Onda