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Control device of power transmission device

A technology of power transmission device and control device, applied in the direction of transmission device control, transmission device, components with teeth, etc., can solve problems such as shaft breakage, and achieve the effect of preventing stress above the fatigue limit

Active Publication Date: 2021-01-01
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is used continuously for a long time in this state, the shaft may be damaged due to cycle fatigue in case of emergency

Method used

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  • Control device of power transmission device
  • Control device of power transmission device
  • Control device of power transmission device

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Embodiment Construction

[0034] Hereinafter, embodiments of the present invention will be described with reference to the drawings. figure 1 It is a figure which shows the structure of the continuously variable transmission mechanism (power transmission device) and its control device which are one embodiment of this invention. As shown in the figure, the continuously variable transmission mechanism 10 is disposed between an input shaft (a pulley shaft according to the present invention) 31 and an output shaft 32 . The continuously variable transmission mechanism 10 has: a driving pulley (DR pulley) 21 provided on an input shaft 31; a driven pulley (DN pulley) 22 provided on an output shaft 32; and an endless belt 23 , which is wound between the driving pulley 21 and the driven pulley 22 . The groove widths of the driving pulley 21 and the driven pulley 22 are increased and decreased in opposite directions by the hydraulic pressure of the oil chambers 61 and 62 , so that the gear ratio between the inp...

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Abstract

To provide a controller of a power transmission device capable of preventing stress equal to or larger than fatigue limit from being generated on a pulley shaft.SOLUTION: A controller of a power transmission device comprises a pulley shaft (31) rotatably supporting a drive pulley (21) of a continuously variable transmission mechanism (10), and a controller (50) that controls stress applied to the pulley shaft (31). The controller is configured to calculate, from a value (A1) obtained by integrating the stress (D) generated in the pulley shaft (31) for each rotation of the pulley shaft (31) over a cumulative number of rotations (N1), the number of rotations (N2) converted to the number of rotations at specified stress (D2), and when the calculated number of rotations (N2) is equal to or greater than a predetermined number of rotations (Na) or exceeds the predetermined number of rotations (Na), execute control so that the stress generated in the pulley shaft (31) is equal to or less than predetermined stress.SELECTED DRAWING: Figure 2

Description

technical field [0001] The present invention relates to a control device for a power transmission device that transmits power (torque) from a power source such as an engine mounted on a vehicle. Background technique [0002] Conventionally, as a power transmission device that transmits power (torque) from a power source such as an engine mounted on a vehicle, for example, as shown in Patent Document 1, there is a transmission having a continuously variable transmission mechanism including a drive pulley, A driven pulley and an endless belt stretched between the driving pulley and the driven pulley. [0003] In the continuously variable transmission mechanism with the above structure, when the lateral pressure of the drive pulley or the transmission torque via the belt is close to the maximum allowable value in design, there is a possibility that the shaft supporting the drive pulley may have a fatigue limit exceeding the fatigue limit. Stress (including stress amplitude, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H9/18F16H61/662
CPCF16H9/18F16H61/662
Inventor 佐藤敦
Owner HONDA MOTOR CO LTD
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