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Gear-shifting schedule curve measuring method and corresponding gear-shifting control method for off-road vehicles

A technology of shifting schedule and measuring method, which is applied in the field of measuring shift schedule curves of off-road vehicles, and can solve problems such as difficult complex working conditions, unguaranteed power and economy of automatic transmission systems of off-road vehicles, etc.

Inactive Publication Date: 2013-06-12
HENAN UNIV OF SCI & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a non-road vehicle gearshift regular curve measurement method and a corresponding gearshift control method to solve the problem that the current gearshift control is difficult to achieve ideal results for complex working conditions of non-road vehicles, resulting in automatic gear shifting of non-road vehicles The problem that the power and economy of the system cannot be guaranteed

Method used

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  • Gear-shifting schedule curve measuring method and corresponding gear-shifting control method for off-road vehicles
  • Gear-shifting schedule curve measuring method and corresponding gear-shifting control method for off-road vehicles
  • Gear-shifting schedule curve measuring method and corresponding gear-shifting control method for off-road vehicles

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Embodiment Construction

[0042] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0043] Embodiment of Off-Road Vehicle Shift Schedule Curve Measuring Method

[0044] 1. Calculation of Shifting Law Curve Equation

[0045] Driven by the vehicle F q and engine dynamic output torque M e The relationship is gradually deduced:

[0046] F q = M e · i g · i o · η n r r

[0047] where i g is the gear ratio of the transmission; i o Transmission ratio of main reducer; η n is the mechanical efficiency of the transmission system; the dynamic output torque of the engine i...

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Abstract

The invention relates to a gear-shifting schedule curve measuring method and a corresponding gear-shifting control method for off-road vehicles, and belongs to the technical field of automatic variable speed control of the off-road vehicles. According to the methods, a gear-shifting schedule curve equation of an AMT (automated mechanical transmission) of an off-road vehicle is calculated firstly; a corresponding gear-shifting schedule curve is drawn; the current practical vehicle speed, the slip ratio and the throttle opening degree are collected, and corresponding target gears are determined; control signals for electromagnetic valves of actuating mechanisms are output through an logical operation; therefore, the electromagnetic valves of the actuating mechanisms are enabled to perform corresponding actions, and the automatic gear shifting is achieved. The gear-shifting schedule curve measuring method and the corresponding gear-shifting control method can guarantee the tractive efficiency and the fuel oil economic efficiency of the AMT of the off-road vehicles, reduces the work intensity of a driver, and enables the vehicles to travel more smoothly; meanwhile the gear-shifting actuating mechanisms are improved, a gear selecting process is omitted, the gear-shifting time is reduced and the gear-shifting efficiency is improved due to the direct gear shifting; and the methods can be used for AMT of off-road engineering vehicles, agricultural vehicles and military motor vehicles.

Description

technical field [0001] The invention relates to a non-road vehicle gear shift regular curve measurement method and a corresponding gear shift control method, and belongs to the technical field of non-road vehicle automatic gear shift control. Background technique [0002] The operation of non-road vehicles is complex, and the driver must not only consider the quality and efficiency of the operation, but also consider the safety of the driving process, vehicle traction efficiency, fuel economy, etc., which can easily cause driver fatigue. The automatic operation control of the shifting process of road vehicles undoubtedly reduces the driver's operating burden, liberates the driver from the cumbersome tasks of vehicle driving, improves the quality and efficiency of non-road vehicle operations, and improves the driver's safety. security. AMT is a modification of the mechanical manual transmission, adding electro-hydraulic actuators, hydraulic circuit systems and electronic con...

Claims

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Application Information

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IPC IPC(8): B60W10/101B60W10/04B60W30/19
Inventor 周志立刘宗剑徐立友赵剡水席志强曹付义闫祥海张静云张敏
Owner HENAN UNIV OF SCI & TECH
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