Title:
HYDRAULIC CONTROL DEVICE AND HYDRAULIC CONTROL METHOD
Document Type and Number:
Japanese Patent JP2020051557
Kind Code:
A
Abstract:
To detect hydraulic variation in its early stage.SOLUTION: A hydraulic control device according to the present invention is configured to control hydraulic pressure of a hydraulic circuit to target hydraulic pressure, and comprises: a hydraulic detection part which detects the hydraulic pressure of the hydraulic circuit; a vibration detection part which detects, based upon the hydraulic pressure detected by the hydraulic detection part, hydraulic vibration occurring when vibration in hydraulic pressure having an amplitude equal to or larger than a predetermined amplitude lasts for a predetermined period threshold or longer; a frequency information detection part which detects vibration frequency information on the hydraulic pressure based upon the hydraulic pressure detected by the hydraulic detection part; and a variation part which varies the predetermined period threshold according to the vibration frequency information.SELECTED DRAWING: Figure 2
Inventors:
MATSUDA SHINGO
YAMAGUCHI TOMOTAKE
YAMAGUCHI TOMOTAKE
Application Number:
JP2018182836A
Publication Date:
April 02, 2020
Filing Date:
September 27, 2018
Export Citation:
Assignee:
DENSO TEN LTD
International Classes:
F15B7/02; F16H61/12