CVT Test Bench and CVT Test Method

A continuously variable transmission and test bench technology, which is applied in the testing of machines/structural components, instruments, mechanical components, etc., can solve the problem of large differences in transmission performance, volume and mechanical properties that are difficult to visualize the real dynamic characteristics of transmissions, Affect system dynamic response characteristics and other issues to achieve the effect of reducing differences, improving accuracy and authenticity

Active Publication Date: 2021-03-19
湖南金润电液控制系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the volume and mechanical properties of the high-pressure chamber formed by the damping hole are difficult to visualize the real dynamic characteristics of the transmission during op

Method used

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  • CVT Test Bench and CVT Test Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] like figure 1 As shown, the continuously variable transmission test bench provided by the embodiment of the present invention includes: an oil tank 100, a first oil pump 200, a pressure reducing valve 300, a first reversing valve 400, a first oil cylinder 500 and a clutch test port 600; The directional valve 400 is provided with a first valve port 401, a second valve port 402, a third valve port 403 and a fourth valve port 404. The working states of the first directional valve 400 include: state one, the first valve port 401 and the second valve port The three valve ports 403 are in fluid communication, the second valve port 402 is in fluid communication with the fourth valve port 404; state two, the first valve port 401 is in fluid communication with the fourth valve port 404, and the second valve port 402 is in fluid communication with the third valve port 403 communication; the first reversing valve 400 is configured to enable the first valve port 401 and the second ...

Embodiment 2

[0036] The continuously variable transmission test method provided by the embodiment of the present invention includes the following steps: adjusting the first reversing valve 400 to change the filling and discharging state of the first hydraulic chamber 501 and the filling and discharging state of the second hydraulic chamber 502; The decompression valve 300 is used to change the hydraulic resistance suffered by the piston in the first oil cylinder 500 . Wherein, the process of clutch engagement and disengagement can be simulated through the movement of the piston in the first oil cylinder 500, and the hydraulic resistance suffered by the movement of the piston in the first oil cylinder 500 can be changed by adjusting the pressure reducing valve 300, thereby simulating the engagement and disengagement of the clutch under different states.

[0037] Further, adjust the working state of the third reversing valve 120 to state one, the first oil pump 200 drives the oil to flow thro...

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Abstract

The invention provides a continuously variable transmission test bed and a continuously variable transmission test method, and relates to the technical field of continuously variable transmission tests. The continuously variable transmission test bed comprises an oil tank, a first oil pump, a pressure reducing valve, a first reversing valve, a first oil cylinder and a clutch test port, wherein thefirst reversing valve is provided with a first valve port, a second valve port, a third valve port and a fourth valve port; the first oil cylinder is provided with a first hydraulic cavity communicating with the first valve port and a second hydraulic cavity communicating with the second valve port; an inlet of the first oil pump is in fluid communication with the oil tank; an outlet of the firstoil pump is in fluid communication with the fourth valve port; the pressure reducing valve is arranged between the first oil pump and the fourth valve port to adjust a flow speed of oil in the fourthvalve port; and the third valve port is in fluid communication with the clutch test port. The continuously variable transmission test bed is capable of reducing the difference between the test performance and the actual working performance of a continuously variable transmission in the prior art, and in particular, the difference of the dynamic performance of a tested hydraulic system.

Description

technical field [0001] The invention relates to the technical field of continuously variable transmission tests, in particular to a continuously variable transmission test bench and a continuously variable transmission test method. Background technique [0002] The response characteristics of the hydraulic control system determine the system characteristics of the continuously variable transmission to a large extent, including: hydraulic system control accuracy, pressure response characteristics, system vibration characteristics at specific frequencies, temperature and performance change characteristics, etc. Therefore, the research and development and production enterprises of continuously variable transmissions need to carry out testing work for the hydraulic system. The hydraulic strength is determined by the load. However, when testing a CVT, since the CVT is in an unloaded state, it is usually necessary to set a damping hole in the oil circuit, and the oil cannot pass t...

Claims

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Application Information

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IPC IPC(8): F15B19/00G01M13/027
CPCF15B19/005G01M13/027
Inventor高帅安颖
Owner湖南金润电液控制系统有限公司