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Clutch controlling apparatus and clutch controlling method

A clutch control, clutch technology, applied in transmission control, components with teeth, belts/chains/gears, etc., can solve the problem of difficulty in verifying the reliability and stability of control actions, and achieve the effect of preventing speed change shocks

Inactive Publication Date: 2008-04-23
K C M
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in conventional clutch control devices, complex control algorithms had to be used in order to obtain control parameters through calculations, and it was difficult to verify the reliability and stability of control operations performed by such control algorithms.

Method used

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  • Clutch controlling apparatus and clutch controlling method
  • Clutch controlling apparatus and clutch controlling method
  • Clutch controlling apparatus and clutch controlling method

Examples

Experimental program
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Effect test

no. 1 approach

[0028] Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings. 1 to 5 show a first embodiment of the clutch control device of the present invention. As an example, as shown in FIG. 9 , the clutch control device 100 of the first embodiment is mounted on a transmission 110 of a construction vehicle such as a wheel loader. The output of the engine E of the wheel loader is decelerated by the transmission 110 and then transmitted to the wheels 120 .

[0029] A clutch control device 100 shown in FIG. 1 is a device that hydraulically controls hydraulic clutches C1 to C4 incorporated in a transmission 110 . The transmission 110 has, as its basic components, a torque converter 10, clutch shafts S1 to S3, an output shaft S4, a plurality of gears G1 to G13, a forward hydraulic clutch F, a reverse hydraulic clutch R, and 1st to 4th gears. Used hydraulic clutches C1~C4.

[0030] The clutch control device 100 includes an ...

no. 2 approach

[0057] Hereinafter, a clutch control device 100 according to a second embodiment of the present invention will be described with reference to FIGS. 6 and 7 .

[0058] In the clutch control device 100 of the second embodiment, as the engine speed for determining the above-mentioned combination control information S, instead of using the shift start time, a predicted speed a little time after the shift start time is used. Other configurations are the same as those of the above-mentioned first embodiment. The differences from the first embodiment will be mainly described below.

[0059] FIG. 6 is a graph showing changes in the engine speed with time before and after the start of shifting, with the vertical axis representing the rotational speed and the horizontal axis representing the time axis. In addition, FIG. 6 shows a case where the change in the engine rotational speed at the time of shifting is larger than the normal level. Such a large change in the engine rotational sp...

no. 3 approach

[0072] Next, a clutch control device according to a third embodiment of the present invention will be described.

[0073] The clutch control device according to the third embodiment is installed in a construction vehicle (for example, a wheel loader) capable of automatic mode setting for automatically selecting a speed level according to conditions such as vehicle speed and engine speed.

[0074] FIG. 8 is a block diagram showing an electrical configuration of a clutch control device according to a third embodiment. The automatic mode includes a driving mode suitable for construction vehicles and a working mode suitable for bucket operations, etc., and can be switched and selected by operating the mode switching switch 60 . An operation signal from the mode selector switch 60 operated by the operator is input to the electronic control unit 30 a of the clutch control device through the interface 35 .

[0075] In the RRPROM 34a of the electronic control unit 30, combination con...

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PUM

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Abstract

A clutch control device includes: a plurality of hydraulic clutches built into a transmission; a clutch switching pattern storage device in which a plurality of clutch switching patterns, each defining engage / release changeover timing with which the plurality of hydraulic clutches are engaged / released are stored in correspondence to individual speed change patterns adopted by the transmission; a clutch switching pattern selection device that selects a clutch switching pattern stored in the clutch switching pattern storage device in correspondence to a speed change pattern for the transmission at a time of speed change; and a hydraulic control device that executes hydraulic control for the plurality of hydraulic clutches in correspondence to the clutch switching pattern selected by the clutch switching pattern selection device.

Description

technical field [0001] The invention relates to a clutch control device and a clutch control method. Background technique [0002] A clutch control device for hydraulically controlling a plurality of hydraulic clutches incorporated in a transmission for construction vehicles is known (see Patent Document 1). [0003] In the clutch control device disclosed in the aforementioned Patent Document 1, the control parameter (hydraulic pressure gradual increase rate) is variably controlled according to the three shifting conditions of the operation amount of the accelerator pedal, the operating state of the brake, and the speed level at the time of shifting. , the control parameter is a parameter necessary to hydraulically control the hydraulic clutch (secondary clutch) when transitioning from the released state to the engaged state. In addition, as another control parameter, it is necessary to set a hydraulic pressure value for rapidly applying hydraulic pressure to the sub clutch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/06F16H59/02F16H59/42F16H59/46F16H61/684
CPCF16H61/061F16H2059/425F16H61/684F16H61/08F16H2059/363F16H2061/0096F16H61/06F16H59/02F16H59/46
Inventor 田中哲二桧垣正美仲山秀雄酒井荣一束田英信
Owner K C M
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