AMT intermediate shaft brake pneumatic control method based on dual PWM valve

An intermediate shaft and brake technology, applied in transmission control, components with teeth, belts/chains/gears, etc., can solve problems such as over-braking, reduce shift impact, shorten shift time, ensure The effect of the slowdown rate

Active Publication Date: 2020-05-08
FAW JIEFANG AUTOMOTIVE CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • AMT intermediate shaft brake pneumatic control method based on dual PWM valve
  • AMT intermediate shaft brake pneumatic control method based on dual PWM valve

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Embodiment Construction

[0032] 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.

[0033] 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 dual PWM valve. The method comprises the following steps of determining intermediate shaft reduction speed difference control target value; determining intermediate shaft reduction speed rate control target value; determining intermediate shaft reductionspeed rate control tolerance value; determining action time value for preliminarily building brake capacity; starting a brake command, and executing a preliminary brake capacity building stage; executing an intermediate shaft brake capacity fine adjustment stage, and carrying out intermediate shaft brake capacity fine adjustment; decontrolling the intermediate shaft brake capacity; judging whetherthe current intermediate shaft rotating speed is not higher than the intermediate shaft rotating speed control target value or not, and if not, finishing the intermediate shaft brake control process,and finishing intermediate shaft brake; and if the current intermediate shaft rotating speed is higher than the intermediate shaft rotating speed control target value, executing the intermediate shaft reduction speed micro control stage until the intermediate shaft brake is finished. The problems of over brake and in-advance decontrolling in the prior art can be solved.

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 Applications(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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