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Gear determining method based on heavy AMT vehicle road load estimation

A technology of road load and decision-making method, applied to components with teeth, belts/chains/gears, mechanical equipment, etc., can solve problems such as poor power performance, unreasonable matching between gear position and vehicle speed, and achieve low cost, The method is simple and easy, and the effect of improving power performance

Active Publication Date: 2014-01-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0004] The main purpose of the present invention is to solve the problem of poor power performance of heavy-duty AMT vehicles after shifting gears, and to provide a gear decision method based on heavy-duty AMT vehicle road load estimation, which can utilize the power interruption of the existing AMT heavy-duty vehicle shifting process characteristics, calculate the road load during the power interruption, so as to select the target gear suitable for the current road load, and solve the problem of unreasonable matching between the gear and the speed of the vehicle under complex working conditions

Method used

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  • Gear determining method based on heavy AMT vehicle road load estimation
  • Gear determining method based on heavy AMT vehicle road load estimation
  • Gear determining method based on heavy AMT vehicle road load estimation

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Embodiment Construction

[0016] In order to better understand the present invention, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0017] figure 1 is a schematic diagram of vehicle driving force and road load changes during the shifting process. The abscissa in the figure is time, and the ordinate is the size of vehicle driving force Ft and road load F_load ( figure 1 The F_load curve in is the road load when not driving downhill). Among them, at time t1, the clutch starts to disengage, and the driving force of the vehicle begins to decrease; at time t2, the clutch is at the disengaged half-engagement point, and the driving force of the vehicle is balanced with the road load, and the speed signal of the output shaft of the transmission is sampled from time t2; Disengage and start to remove the original gear, at this time, the driving force of the vehicle is reduced to zero; the gear removal is completed at time t4...

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Abstract

Disclosed is a gear determining method based on heavy AMT vehicle road load estimation. According to the method, the road load of a vehicle under the current road condition is estimated during power failure of vehicle gear shifting, an AMT gear shifting controller selects reasonable gears according to the road load, and accordingly, gear shifting control under different road loads of the vehicle is completed.

Description

technical field [0001] The invention relates to a method for road load estimation and gear position decision-making of a heavy-duty vehicle equipped with an AMT (automatic mechanical transmission). This method estimates the road load of the vehicle under the current road conditions during the power interruption process of the vehicle gear shift, and the AMT gear shift controller selects a reasonable gear position according to the road load, and then completes the gear shift control of the vehicle under different road loads. Background technique [0002] AMT is composed of adding an automatic transmission control system on the basis of a manual transmission. During the shifting process of the AMT, it is necessary to coordinate and control the clutch separation and engagement process, as well as the selection of the transmission gear. During the shifting process of AMT, the power transmitted from the engine to the transmission system is cut off during the period from clutch se...

Claims

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Application Information

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IPC IPC(8): F16H59/66F16H59/40
CPCF16H59/40F16H59/66F16H59/74F16H2059/663F16H2059/746
Inventor 刘海鸥晋磊陈慧岩赵亦农金亚英
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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