Temperature analyzing method for lockup clutch friction plate of hydraulic torque converter

Abstract

The invention discloses a temperature analyzing method for a lockup clutch friction plate of a hydraulic torque converter. The temperature analyzing method comprises the following steps of: 1, obtaining controlling oil pressure and friction rotation speed of a lockup clutch of the hydraulic torque converter through a CAN (controller area network) line; 2, calculating heat-flow density of the lockup clutch friction plate: the heat-flow density q is obtained through a formula: q= mu Rp delta omega, wherein mu is a friction factor of the friction plate, R is the semidiameter of the friction plate, the unit of the R is millimeter, p is the controlling oil pressure of the lockup clutch, the unit of the p is Pa, the delta omega is the sliding friction speed difference of the lockup clutch, and the unit of the delta omega is rpm; 3; establishing a two-dimensional simplified model of the lockup clutch of the hydraulic torque converter; 4, establishing a three-dimensional flow fixed coupled model of the lockup clutch of the hydraulic torque converter, generating a grid and setting a boundary condition, wherein the boundary condition comprises a material characteristic, a boundary convective heat transfer coefficient, a periodicity boundary, an operation oil inlet parameter, an operation oil outlet parameter and a friction plate heat boundary condition; and 5, simulating and calculating the temperature of the converter lockup clutch friction plate of the hydraulic torque converter.

Description

technical field [0001] The invention relates to a method for analyzing the friction plate of a lock-up clutch of a hydraulic torque converter for a vehicle. More specifically, the invention relates to a method for analyzing the temperature of the friction plate of a lock-up clutch of a hydraulic torque converter. Background technique [0002] At present, almost all the hydromechanical automatic transmissions of the famous automobile companies in the world have adopted the lock-up clutch slip friction control technology. When the lock-up clutch has slight sliding friction but is not completely locked, part of the power is transmitted through hydraulic power, and the other part is mechanically transmitted through the lock-up clutch. The incomplete locking of the locking clutch can greatly reduce the vibration and noise of the transmission system, and fully expand the locking field. When the lock-up clutch is in the sliding-friction condition, due to the joint action of the hy...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problem in the prior art that the sliding friction control of the lock-up clutch cannot be carried out according to the actual temperature of the friction plate, but only by detecting the oil temperature of the hydraulic torque converter to predict the temperature of the friction plate To solve the problem, a method for analyzing the friction plate temperature of the torque converter lock-up clutch is provided

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