TEMPERATURE ESTIMATION CALCULATION DEVICE FOR FRICTIONAL ENGAGEMENT ELEMENT

Title:

TEMPERATURE ESTIMATION CALCULATION DEVICE FOR FRICTIONAL ENGAGEMENT ELEMENT

Document Type and Number:

WIPO Patent Application WO/2014/115424

Kind Code:

A1

Abstract:

This invention is provided with: a heat generation calculation unit (32) for calculating the temperature increase (ΔT(up)) per unit time on the basis of the amount of heat generated (Σt) between the friction materials of a clutch (23) interposed in a vehicle driving force transmission system, the operating states of complete engagement, slip engagement, and release being achieved in the clutch (23); a heat dissipation calculation unit (33) for calculating the temperature decrease (ΔT(down)) per unit time on the basis of the amount of heat dissipated (f(t)) from the friction materials of the clutch (23); and a clutch temperature estimation calculation processor (31) for adding the temperature change (ΔT) to a previous clutch temperature value (Tpv) and thereby calculating the present clutch temperature value (Tnow). The heat dissipation calculation unit (33) estimates the amount of lubricant passing around the friction materials of the clutch (23), and uses the estimated lubricant amount for the amount of heat dissipated (f(t)) by transmission of heat from the friction materials to the lubricant.

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Inventors:

KAWAKAMI HIROKI (JP)
MURAMOTO ATSUMI (JP)
MIURA KOTA (JP)

Application Number:

PCT/JP2013/082000

Publication Date:

July 31, 2014

Filing Date:

November 28, 2013

Export Citation:

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Assignee:

JATCO LTD (JP)

International Classes:

F16D25/12; F16H59/72

Foreign References:

JP2009243638A	2009-10-22
JP2009079717A	2009-04-16
JP2011149516A	2011-08-04
JP2005351349A	2005-12-22
JP2008128385A	2008-06-05
JP2011099513A	2011-05-19

Other References: