Drive train for a mobile vehicle and method for controlling said drive train

A technology for transmission lines and vehicles, which is applied in transmission control, engine control, transmission, etc., and can solve problems such as speed difficulties

Inactive Publication Date: 2009-11-11
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the driver is also operating the working hydraulics and, if necessary, the steering wheel, it is extremely difficult for the driver to maintain close to the required speed

Method used

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  • Drive train for a mobile vehicle and method for controlling said drive train

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Embodiment Construction

[0031] The only attached image is figure 1 An engine 1 is shown, which drives a pump impeller 3 of a hydrodynamic torque converter via a primary clutch 2 . The turbine 4 drives the load switching transmission 5 . The engine 1 also drives an auxiliary transmission 6 which drives a hydraulic pump 7 of the working hydraulic system. By actuating the selector lever 8 , the volume flow of the hydraulic pump 7 is delivered to a consumer 9 , for example a bucket of a wheel loader. The hydraulic pump 7 may be a load-sensing pump (Load-Sensing-Pump). The electronic control unit 10 receives signals from the selector lever 8 as well as the accelerator pedal 11 and the foot brake pedal 12 . The electronic control unit also receives sensor signals of engine 1 speed, clutch 2 operation and load switching transmission 5 speed. If the driving speed is adjusted with the accelerator pedal 11 and the selector lever 8 is actuated simultaneously, the electronic control unit 10 regulates the eng...

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Abstract

In a drive train for a working machine, in particular, a wheel loader, the driving speed is preselected via a driving pedal ( 11 ) and the working hydraulic system is actuated via a selector lever ( 8 ), whose signals are fed to an electronic control unit ( 10 ) which regulates a drive engine ( 1 ) and a clutch ( 2 ) arranged between the drive engine ( 1 ) and a pump impeller ( 3 ) of a hydrodynamic torque converter in such a manner that an auxiliary drive ( 6 ) for a pump ( 7 ) of the working hydraulic system is operated at a sufficient speed, while the preselected driving speed is not exceeded.

Description

technical field [0001] The invention relates to a transmission line of a moving vehicle. Background technique [0002] Drive lines according to classification are used in particular on work machines such as wheel loaders, graders or stackers, for example. In this case, the engine drives the drive wheels of the vehicle through a hydrodynamic torque converter and a downstream load switching transmission. The engine also drives the auxiliary drive for the hydraulic pumps of the working hydraulic system. If the driver intends, for example, to lift the bucket of a wheel loader and slowly approach the truck, he simultaneously actuates the foot brake and the accelerator pedal in order to increase the rotational speed of the hydraulic pump engine and reduce the travel speed by means of the foot brake. In this case the power input into the hydrodynamic torque converter is converted into heat energy. [0003] DE 195 21 458 A1 discloses an electrohydraulic control device for transmi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F9/22B60K25/00B60W10/04B60W10/10B60W10/02B60W10/06B60W30/18G06G1/00
CPCF16H2061/0234Y10T477/735Y10T477/743Y10T477/70B60W10/30B60K2741/025Y10T477/745B60W2540/12Y10T477/753B60W2540/16E02F9/2253B60K2741/165B60W2540/10Y10T477/73B60W10/06B60W10/02B60W2510/0225Y10T477/747B60W30/18Y10T477/75F16H2045/002B60W10/04B60W10/103B60W30/1819E02F9/20B60K25/00
Inventor 贝恩德·奥曼
Owner ZF FRIEDRICHSHAFEN AG
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