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Control method for preventing frequent gear shifting of automatic speed changer

A technology of automatic transmission and control method, applied in the direction of transmission control, elements with teeth, belt/chain/gear, etc., to achieve the effect of avoiding frequent shifting

Active Publication Date: 2020-04-03
SHENGRUI TRANSMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a control method for preventing frequent shifting of automatic transmissions, which overcomes the defects in the existing control methods. After adopting the control method of the present invention, it is avoided that when the automatic transmission is in use, when reaching the shift line Frequent gear shifting due to throttle opening or turbine speed fluctuations near the critical value reduces the number of times the automatic transmission clutch is used and prolongs the service life of the transmission

Method used

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  • Control method for preventing frequent gear shifting of automatic speed changer
  • Control method for preventing frequent gear shifting of automatic speed changer
  • Control method for preventing frequent gear shifting of automatic speed changer

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Embodiment Construction

[0017] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that the following does not constitute a limitation to the protection scope of the present invention.

[0018] Examples such as figure 2 , image 3 As shown, a control method for preventing frequent shifting of automatic transmissions. The clutch is arranged inside the automatic transmission. It is completed by pressing the friction plate; the front end of the automatic transmission is equipped with a hydraulic torque converter, and the front and rear ends of the hydraulic torque converter are respectively the pump wheel (rigidly connected with the engine) and the turbine (rigidly connected with the input shaft). When the automatic transmission shifts gears, the hysteresis speed of a shift point...

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Abstract

The invention discloses a control method for preventing frequent gear shifting of an automatic speed changer. When the automatic speed changer conducts gear shifting, the hysteresis rotation speed ofone gear shifting point is added during gear shifting point calculation, the output gear shifting point is larger than the sum of the calibrated gear increasing line and the gear increasing hysteresisrotation speed nUP or smaller than the sum of the calibrated gear lowering line and the gear lowering hysteresis rotation speed nDN, and gear shifting is finished. When the automatic speed changer conducts gear shifting, the hysteresis rotation speed of one gear shifting line is added during gear shifting point calculation of a gear shifting graph, frequent gear shifting caused by accelerator aperture or turbine rotation speed fluctuation when the position near the critical value of the gear shifting line is reached is avoided.

Description

technical field [0001] The invention belongs to the technical field of automatic transmission control, and in particular relates to a control method for preventing frequent shifting of automatic transmissions. Background technique [0002] In the automatic mode (AUTO) of an automatic transmission (AT) with a hydraulic torque converter, the rules for shifting gears according to input signals such as turbine speed and throttle opening are called shift maps. When calculating the shift map, when the turbine speed and throttle opening fluctuate at the shift point, it will cause frequent shifts of the automatic transmission, such as figure 1 shown. [0003] In the process of realizing the present invention, the inventor found that the prior art has at least the following disadvantages: frequent shifting of gears during use of the transmission, increasing the number of times the clutch is used, and shortening the service life of the automatic transmission. [0004] At present, th...

Claims

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Application Information

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IPC IPC(8): F16H61/00F16H61/48F16H59/38F16H59/24
CPCF16H59/24F16H59/38F16H61/00F16H61/48F16H2059/385F16H2061/0012
Inventor 杨磊刘强曹永宗伟郭太民王洪志陈彦波李志宗王圣涛李杰
Owner SHENGRUI TRANSMISSION
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