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A method and system for selecting a suitable starting gear

A suitable and starting resistance technology, applied in the direction of components with teeth, transmission control, belt/chain/gear, etc., can solve the problem of inability to adjust the starting gear, and achieve the effect of optimal starting performance

Active Publication Date: 2022-07-08
ZF COMMERCIAL VEHICLE SYSTEMS (QINGDAO) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the AMT application field basically focuses on the gear selection of the transmission itself, without considering other factors that can affect the transmission chain speed ratio, such as rear axle speed ratio, tire radius, etc. Timely adjustment of starting gear for heavy / slope etc.

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  • A method and system for selecting a suitable starting gear
  • A method and system for selecting a suitable starting gear
  • A method and system for selecting a suitable starting gear

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Embodiment Construction

[0027] In order to facilitate those skilled in the art to understand and implement the present invention, the specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0028] A method for selecting a suitable starting gear, comprising the following steps:

[0029] Step 1: Establish the starting resistance M of the vehicle r and transmission chain ratio I whole Corresponding data table, where r is {1,2,…,N}; different starting resistance M in the data table r Corresponding to different transmission chain speed ratio I whole ;

[0030] Starting resistance M of the vehicle r :

[0031] M r =M+M*Pin;

[0032] Among them, M is the vehicle weight, and Pin is the slope;

[0033] Vehicle transmission chain speed ratio I whole :

[0034]

[0035] Among them, Es is the engine speed, Rt is the tire rolling radius, and Sfa is the wheel speed signal of the anti-lock braking system ABS...

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Abstract

The invention discloses a method and a system for selecting a suitable starting gear, belonging to the application field of commercial vehicle AMT. First establish the starting resistance M of the vehicle r and transmission chain ratio I whole The corresponding data sheet, and then according to the current starting resistance M' of the vehicle, select the corresponding transmission chain speed ratio I in the data sheet whole_request ; Calculated based on I whole_request The current transmission demand ratio I GB_request , according to I GB_request , match the output ratio greater than or equal to I in the ratio list GB_request range of starting gears, select the minimum starting gear as the current starting gear. A system for selecting a suitable starting file proposed by the present invention includes a storage module, a selection module, a calculation module and a search module. The present invention can automatically select a more suitable starting gear for different vehicle models, and is used to adjust the transmission chain speed ratio of the whole vehicle, so as to achieve better starting performance.

Description

technical field [0001] The invention relates to the application field of commercial vehicle AMT, in particular to a method and system for selecting a suitable starting gear. Background technique [0002] The application range of commercial vehicles is extremely wide and complex, and the configuration of commercial vehicles is rich. The rear axle speed ratio of the tractor and the matching transmission speed ratio are very different. Choosing a suitable starting gear will greatly improve the starting comfort of automatic transmission vehicles. [0003] At present, the application field of AMT basically focuses on the gear selection of the transmission itself, without considering other factors that can affect the transmission chain speed ratio, such as rear axle speed ratio, tire radius, etc. Adjust the starting gear in a timely manner such as weight / slope. SUMMARY OF THE INVENTION [0004] The purpose of the present invention is to provide a method and system for selecting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/02F16H59/36F16H59/52F16H59/66
CPCF16H61/0213F16H59/36F16H59/52F16H59/66F16H2061/0223F16H2061/023F16H2059/366F16H2061/009F16H2059/663
Inventor 程悦晓
Owner ZF COMMERCIAL VEHICLE SYSTEMS (QINGDAO) CO LTD