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A Pneumatic Control Method of AMT Intermediate Shaft Brake Based on Dual PWM Valves

A technology for intermediate shafts and brakes, which is applied in the direction of transmission control, components with teeth, belts/chains/gears, etc., can solve problems such as over-braking, reduce shifting impact, ensure shifting success rate, Guarantee the effect of shifting quality

Active Publication Date: 2021-05-28
FAW JIEFANG AUTOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a pneumatic control method for the AMT intermediate shaft brake based on dual PWM valves, which can overcome the problems of over braking and early release of braking in the prior art

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  • A Pneumatic Control Method of AMT Intermediate Shaft Brake Based on Dual PWM Valves

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Embodiment Construction

[0031] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings but not all of them.

[0032] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordin...

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Abstract

The invention relates to the field of transmission control, in particular to an AMT intermediate shaft brake pneumatic control method based on a double PWM valve, which comprises the steps of: determining an intermediate shaft deceleration speed difference control target value; determining an intermediate shaft deceleration rate control target value; Determine the control tolerance value of the deceleration rate of the intermediate shaft; determine the action time value for the initial establishment of the braking capacity; start the braking command, enter the preliminary braking capacity establishment stage; enter the intermediate shaft braking capacity fine-tuning stage, carry out the intermediate shaft braking capacity Fine-tuning; the braking capacity of the intermediate shaft is released from control; it is judged whether the current intermediate shaft speed is not higher than the target value of the intermediate shaft speed control, if not higher, the intermediate shaft braking control process is over, and the intermediate shaft braking is completed; When the shaft speed is higher than the control target value of the intermediate shaft speed, the intermediate shaft deceleration micro-control stage is performed until the intermediate shaft braking is completed. The invention can overcome the problems of over-braking and early-release braking in the prior art.

Description

technical field [0001] The invention relates to the technical field of transmission control, in particular to an AMT intermediate shaft brake pneumatic control method based on double PWM valves. Background technique [0002] The sliding gear sleeve shifting method is widely used in AMT (Automated Mechanical Transmission) transmissions. When the sliding gear sleeve is shifted, it is necessary to shift gears within an appropriate speed difference range. When the shifting speed difference is not suitable, the sliding gear sleeve shifting will cause problems such as large shifting impact, shift failure or even damage to the sliding gear sleeve. [0003] The AMT transmission using the sliding gear sleeve shifting method reduces the speed of the intermediate shaft during the upshift process, so that the sliding gear sleeve can complete the shifting action under a suitable speed difference. In order to shorten the shifting time and quickly complete the deceleration of the intermed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/00F16H61/02F16H61/04
CPCF16H61/0059F16H61/02F16H61/0403F16H2061/0411
Inventor 于跃王巍巍王继昆董荷强于洁清柳英杰赵达孙国晖赵军刘四海
Owner FAW JIEFANG AUTOMOTIVE CO
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