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Fill parameter learning for wet plate clutches based on an output of a torque converter

A technology of wet clutches and torque converters, applied in clutches, couplings, mechanical equipment, etc., can solve problems such as bad gear shifting, improper filling parameters of transmission controllers, etc.

Active Publication Date: 2019-09-27
DANA BELGIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Another problem with the current typical calibration process is that the transmission controller does not know when a poor shift is being performed due to improper fill parameters

Method used

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  • Fill parameter learning for wet plate clutches based on an output of a torque converter
  • Fill parameter learning for wet plate clutches based on an output of a torque converter
  • Fill parameter learning for wet plate clutches based on an output of a torque converter

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Embodiment Construction

[0025] It should be understood that the invention may employ various alternative orientations and step sequences unless expressly indicated to the contrary. It is also to be understood that the specific devices and processes illustrated in the drawings and described in the following specification are merely exemplary embodiments of the inventive concepts defined herein. Accordingly, no particular dimensions, orientations or other physical characteristics relating to the disclosed embodiments should be considered limiting unless expressly stated otherwise.

[0026] The filling process of a clutch is usually characterized by two main parameters, filling time and engagement pressure. These parameters are shown in the figure 1 Exemplary pressure curves are shown. figure 1 "T_fill" referred to in indicates the fill time of the exemplary pressure profile, and "P_kiss" referred to indicates the kiss pressure of the exemplary pressure profile. It should be noted that the apparatus ...

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Abstract

A system and method for determining filling parameters of a wet clutch system used with a transmission is provided. The method comprises the steps of collecting information about the torque output of the torque converter of the transmission during a filling process associated with the wet clutch system, analyzing the signal associated with the torque output of the torque converter within a time period of the filling process associated with the wet clutch system, and identifying when the signal associated with the torque output of the torque converter changes with respect to the time period of the filling process of the piston to determine a filling parameter associated with the wet clutch system. The system and method eliminates a need for recalibrating the transmission and accommodates production variances for components and assembly of systems using wet clutch systems.

Description

technical field [0001] The present invention relates to the operation of hydraulic clutches, and more particularly to systems and methods for adjusting fill parameters of wet plate clutches. Background technique [0002] During shifting in a step ratio transmission, clutches are engaged and disengaged to allow power transfer through a number of different power paths. Typically, when a gear shift is performed, one clutch is disengaged by reducing oil pressure on the clutch piston (also known as an off-going clutch), and the other clutch is engaged by increasing pressure on the clutch piston (also known as an off-going clutch). Engage (on-coming) clutch). During overlapping shifts, this process occurs simultaneously in a coordinated manner. During the fill phase of the shift, the piston of the ongoing clutch is positioned adjacent to the multiple friction plates by modulating the pressure of the transmission fluid. [0003] Positioning of the piston is performed by using a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D48/06
CPCF16D48/066F16D2300/18F16D2500/1026F16D2500/10412F16D2500/30412F16D2500/5014F16D2500/5102
Inventor M·RJ·沃斯特耶M·MA·马森K·夏里阿特马达
Owner DANA BELGIUM