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A Calculation Method of Target Clamping Force of Metal Belt Continuously Variable Transmission Based on Reserved Clamping Force

A continuously variable transmission, metal belt technology, applied in the direction of elements with teeth, belt/chain/gear, transmission control, etc., can solve the problem of not only clamping force, difficult testing, etc.

Active Publication Date: 2019-06-14
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of using the dynamic safety factor following the torque and the torque change rate can ensure the safe transmission of torque and improve the efficiency of torque transmission; but there are some disadvantages, because the clamping force ratio (KPKS) is related to the speed, torque, torque ratio, and speed ratio. Related, when the speed ratio and torque remain constant, the clamping force of the driving and driven pulleys is not unique, and the test is more difficult

Method used

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  • A Calculation Method of Target Clamping Force of Metal Belt Continuously Variable Transmission Based on Reserved Clamping Force
  • A Calculation Method of Target Clamping Force of Metal Belt Continuously Variable Transmission Based on Reserved Clamping Force
  • A Calculation Method of Target Clamping Force of Metal Belt Continuously Variable Transmission Based on Reserved Clamping Force

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Embodiment Construction

[0063] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0064] The invention provides a target clamping force calculation method, and the calculation method of the invention is applied to a metal belt type continuously variable transmission device.

[0065] In the theoretical calculation process, under the premise of ensuring the safe transmission of torque, the required minimum clamping force is shown in formula (1).

[0066]

[0067] In the formula, F is the target clamping force of the pulley; T is the torque transmitted by the pulley; α is the half cone angle of the pulley; μ is the friction coefficient between the pulley and the metal belt; R is the working radius of the pulley.

[0068] Considering the anti-drag condition, the torque values ​​in all the formulas in this paper are the absolute values ​​of the torque.

[0...

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Abstract

The invention discloses a metal belt-type stepless transmission target clamping force calculation method based on reserved clamping force. The method comprises the steps that according to formulas, the minimum target clamping force F<pri> of a driving belt wheel and the minimum target clamping force F<sec> of a driven belt wheel are calculated; and then according to the current target speed ratioand the corresponding clamping force ratio, the driven belt wheel target clamping force F<sec_KPKS> corresponding to the driving belt wheel and the driving belt wheel target clamping force F<pri_KPKS>corresponding to the driven belt wheel are calculated.

Description

technical field [0001] The invention relates to the field of transmission control, in particular to a method for calculating the target clamping force of a metal belt type continuously variable transmission based on reserved clamping force. Background technique [0002] The invention relates to the technical field of transmission control, in particular to a clamping force control strategy of a metal belt continuously variable transmission, which can be applied to a transmission equipped with a metal belt continuously variable transmission. As an ideal transmission for automobiles, continuously variable transmissions are increasingly favored by OEMs under the dual pressures of energy and environment. Metal belt CVT is the most mature CVT, its core technology is clamping force control and speed ratio control. The magnitude of the clamping force will directly affect the friction and torque transmission between the pulley and the metal belt; if the clamping force is too large, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/02F16H59/16F16H59/70F16H59/38
CPCF16H59/16F16H59/38F16H59/70F16H61/02F16H2059/704
Inventor 雷雨龙王林波张英刘科付尧张煜晨
Owner JILIN UNIV
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