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Main oil pressure control method for automatic transmission

A technology of automatic transmission and control method, which is applied in transmission control, components with teeth, belts/chains/gears, etc., can solve problems such as not being able to provide enough lubricating oil and affect the efficiency of automatic transmissions, and achieve perfect functions and prevent Sudden changes in oil pressure and prevent damage

Active Publication Date: 2012-07-04
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the main oil pressure of the automatic transmission is too low, it will cause the friction plate of the clutch to slip and cannot provide enough lubricating oil. When the oil pressure is too high, the efficiency of the oil pump will decrease, which will affect the efficiency of the automatic transmission

Method used

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  • Main oil pressure control method for automatic transmission
  • Main oil pressure control method for automatic transmission
  • Main oil pressure control method for automatic transmission

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Embodiment

[0032] Embodiment: The control method of an automatic transmission in this embodiment is applied to a planetary electro-hydraulic automatic transmission. During the working process of the automatic transmission, the control method can calculate the required main force according to different gear positions and working conditions. At the same time, the main oil pressure request in different situations is processed. The control method includes selecting the maximum value from the minimum main oil pressure demand determined by the gear position determination, thermal mode, high pressure demand, and high speed. When there is no gear shift When the main oil pressure is determined by management and shift fault diagnosis, the maximum value is used as the main oil pressure of the system. When there is a main oil pressure determined by shift management and shift fault diagnosis, the above maximum value is not used, and the shift fault is used The main oil pressure determined by the diagn...

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Abstract

The invention relates to a main oil pressure control method for an automatic transmission, which can be used for selecting proper oil pressure according to different conditions. The proper main oil pressure value is determined by judging parameters such as the state of the transmission, main oil pressure needed by a current gear, main oil pressure needed by a hot mode, main oil pressure needed by a high-speed mode, main oil pressure needed by a specific mode and the like, so that sufficient lubrication is realized, and the efficiency of the automatic transmission can be ensured. The main oil pressure control method is applied to all automotive automatic transmissions.

Description

[0001] technical field [0002] The invention relates to a hydraulic control method, in particular to a main oil pressure control method of an automatic transmission of an automobile. Background technique [0003] Hydraulic transmissions are widely used in the automotive industry. The application of hydraulic transmission in automobile transmission system is one of the main application fields. In such systems, oil pressure is a primary control target, but pressure control varies depending on the use of solenoid valves. Pressure control is also an important part of achieving a proper performance of such systems. [0004] In the automotive automatic transmission system, the control of the electronically controlled transmission is also mainly used to control the pressure of the hydraulic oil circuit. Pressure control in hydraulic systems is mainly used to control the control of different units in automatic transmissions, including the meshing of planetary gears. Although th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/00
Inventor 艾伦・莫里斯刘建李俊茂陈勇罗大国刘文忠
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD
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