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Transmission Speed ​​Synchronization Method

A speed synchronization and gearbox technology, applied to components with teeth, transmission control, belt/chain/gear, etc., can solve problems such as excessive shifting and shifting impact, achieve fine adjustment, avoid impact, smooth shifting effect

Active Publication Date: 2019-05-28
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the shift is too fast, it is easy to cause shift shock

Method used

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  • Transmission Speed ​​Synchronization Method

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Embodiment Construction

[0014] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0015] The invention discloses a method for synchronizing the rotational speed of a gearbox. Step S1 is to obtain vehicle state information; step S2 is to obtain a standard rotational speed synchronization time according to the vehicle state information; and step S3 is to adjust the synchronous rotational speed time according to the standard rotational speed synchronization time Clutch tightness and reduced engine speed.

[0016] Wherein, the vehicle status information includes at least driving mode, target gear, shift type and accelerat...

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Abstract

The invention discloses a gearbox rotating speed synchronization method. The gearbox rotating speed synchronization method comprises the steps that vehicle state information is acquired; the standardrotating speed synchronization time is acquired according to the vehicle state information; and according to the standard rotating speed synchronization time, the clutch pressing degree is adjusted and the rotating speed of an engine is reduced when the synchronous rotating speed is achieved. The standard rotating speed synchronization time is (Af+B+C+D) / KE, wherein f is an adaptation value, takesa value 1 when a vehicle has a driving mode, and otherwise, takes a value 0, B is a simulated digital value of a target gear, C is a simulated digital value of the gear shifting type, D is the percentage value of the accelerator opening degree, K is an adjusting coefficient, and E is an adjusting constant. According to the gearbox rotating speed synchronization method, the corresponding standardrotating speed synchronization time is obtained through the vehicle state information, and the clutch pressing degree is adjusted and the rotating speed of the engine is reduced when the synchronous rotating speed is achieved according to the time in a corresponding mode; and a plurality of factors are considered in the mode, so that the adjustment is finer, and rapid gear shifting is realized while the smoothness of gear shifting is ensured.

Description

technical field [0001] The invention relates to a method for synchronizing the rotating speed of a gearbox. Background technique [0002] Compared with other automatic transmissions, dual clutch automatic transmissions (Dual Clutch Transmission, DCT) have the advantages of high power transmission efficiency, fast shifting speed, and fuel economy. Therefore, dual clutch automatic transmissions are favored by more and more OEMs. [0003] The shifting condition is the most frequently used in the driving process of the vehicle, and the shifting speed is the advantage of the DCT gearbox compared to other gearboxes. However, if the shift is too fast, it is easy to cause shift shock. Contents of the invention [0004] The purpose of the present invention is to provide a method for synchronizing the rotational speed of a gearbox, which reduces the impact during the shifting process and improves the smoothness and comfort of the shifting. [0005] The transmission speed synchroni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/04
CPCF16H61/0403
Inventor 李星涂安全罗贤虎张金超张学峰丛成刚徐富家
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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