Temperature estimation calculation device for frictional coupling elements

Abstract

A temperature estimation computing device for a friction coupling element. In the clutch (23), which is inserted into the driving force transmission system of the vehicle and realizes the operating states of complete engagement, slip engagement, and release, it is equipped with a heat calculation unit (32) based on the heat generated between the friction materials of the clutch (23). The calorific value (Σt) calculates the rise temperature ΔT (up) per unit time; the heat dissipation calculation unit (33), which calculates the fall temperature per unit time based on the heat dissipation f (t) emitted from the friction material of the clutch (23) ΔT(down): a clutch temperature estimation operation processing unit (31) which calculates the current value Tnow of the clutch temperature by adding the change temperature ΔT to the previous value Tpv of the clutch temperature. The heat dissipation computing unit (33) estimates the amount of lubricating oil passing around the friction material of the clutch (23), and sets the estimated amount of lubricating oil as the heat dissipation amount f(t) dissipated by heat transfer from the friction material to the lubricating oil. .

Description

technical field [0001] The invention relates to a temperature estimating computing device for a friction coupling element of a friction clutch or a friction brake, which is inserted into a driving force transmission system of a vehicle and can realize the operating states of complete coupling, sliding coupling, and release. Background technique [0002] Currently, there is known a surface temperature calculation device of a frictional engagement device for a vehicle, which improves the calculation accuracy of the surface temperature by correcting the cumulative cooling temperature based on the heat generation per unit time of the lock-up clutch and the turbine speed thereof (for example, , refer to Patent Document 1). [0003] Patent Document 1: (Japanese) Unexamined Patent Application Publication No. 2011-99513 [0004] However, in the surface temperature calculation device of the conventional frictional engagement device for vehicles, although the temperature estimation t...

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Problems solved by technology

[0004] However, in the surface temperature calculation device of the conventional frictional engagement device for vehicles, although the temperature estimation that takes into account the heat dissipation effect by the turbine rotation speed is achieved, the amount of lubricating oil passing around the friction material of the lock-up clutch is not taken into account. The cooling effect achieved

Therefore, there is a problem that a large discrepancy occurs between the actually measured value and the calculated value of the clutch surface temperature.

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