JP2010285970A - Governor adjustment control device of working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique whereby a working machine with a decelerator pedal functioning is operated by anyone regardless of his/her level of skill in handling the decelerator pedal. <P>SOLUTION: A governor adjustment control device 1 of the working machine is configured so that a step-in amount is fed from a foot pedal 3 and inputted, and in accordance with the inputted foot pedal step-in amount, a command to increase or decrease the engine speed is given to an engine governor 4. Both a command to increase the engine speed with increasing foot pedal 3 step-in amount and a command to decrease the engine speed on the contrary are issued, and in accordance to a changeover command from a changeover means 2, either control is selected. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a governor adjustment control device for a work machine such as a bulldozer.

  For example, a work machine such as a bulldozer is equipped with a decel pedal that reduces the engine speed when depressed, as a foot pedal for governor adjustment (see Patent Documents 1 and 2).

Japanese Patent Laid-Open No. 2-5720 (upper left column on page 2, lines 1 to 6) JP-A-2-21338 (page 1, right column, line 20 to page 2, upper left column, lines 1 to 5)

  However, the foot pedal as a governor adjustment mounted on other traveling vehicles, particularly ordinary passenger cars, is an accelerator pedal that increases the engine speed when depressed, and for those who are used to such an accelerator pedal, the above-mentioned There was a problem that the operation of the pedal was difficult to get used to.

  The present invention was devised in view of the above-described problems of the prior art, and is intended to provide a technique that allows any person to operate a work machine on which the pedal operates, regardless of the familiarity of the pedal. It is.

For this reason, the governor adjustment control device for a work machine according to the present invention is:
A governor adjustment control device for a work machine that inputs a depression amount value from a foot pedal and outputs a command to increase or decrease the engine speed to the engine governor according to the inputted foot pedal depression amount value,
In response to an increase in the amount of foot pedal depression, both the output of a command to increase the engine speed and the output of a command to decrease the engine speed are performed.
One of the controls is selected and performed by a switching command from the switching means.

  According to the present invention, the foot pedal can be used as a decel pedal or an accelerator pedal by switching the switching means. For this reason, an operator who is not used to a decel pedal selects a function as an accelerator pedal, while an operator who is accustomed to a decel pedal can select a function as a decel pedal, regardless of the familiarity of the decel pedal, It will be possible to operate the work machine where the decel pedal functions.

It is an apparatus block diagram of the specific embodiment example which concerns on this invention.

  An example of a specific form according to the present invention will be described with reference to FIG. This embodiment is an example applied to a bulldozer. In addition, the form example shown below is an example of this invention to the last, Comprising: Of course, this invention is not limited to them.

  The bulldozer in this embodiment is provided with a foot pedal 3 in the cab and an electronically controlled governor controller 1 for controlling the engine speed. In this embodiment, the mode changeover switch 2 for switching the control mode of the governor controller (this point will be described in detail later) is provided in the cab.

  The governor controller 1 receives a depression amount value from the foot pedal 3, and outputs a predetermined rotational speed command corresponding to the input value to the engine governor 4 based on the input value. There are two different control modes for a predetermined number of revolutions, one of which is a command output for increasing the engine speed in response to an increase in the depression amount value from the foot pedal 3 (hereinafter referred to as this). 2 is a command output for decreasing the engine speed (hereinafter referred to as a “decel mode”). The governor controller 1 is set to select and execute control of either of these two modes, and the selection is based on the switch selection command signal of the mode changeover switch 2. For this reason, the output line of the mode changeover switch 2 is connected to the input line of the governor controller 1. The governor controller 1 is not an independent controller for the engine governor, but may be a part of another controller, for example, a vehicle controller that controls the vehicle in general.

  The engine governor adjustment according to this embodiment will be described. When the operator turns on an engine switch (not shown), the governor controller 1 issues a command to increase or decrease the engine speed according to the depression amount value of the foot pedal 3 based on the mode in which the mode changeover switch 2 is selected. Output to engine governor 4. If the mode changeover switch 2 is switched at any stage, the mode is switched to another mode, and an increase / decrease command completely opposite to the rotation speed command so far is output. For example, in the state before the engine switch is turned on, if the mode changeover switch 2 is selected to the decel mode, the engine switch is turned on first to enter the decel mode, and a command to decrease the engine speed with respect to the foot pedal 3 being depressed. Output. However, if the mode changeover switch 2 is switched to the accelerator mode, the governor controller 1 switches to the accelerator mode, and outputs a command for increasing the engine speed when the foot pedal 3 is depressed.

  Thus, in this embodiment, the foot pedal 3 functions as both a decel pedal and an accelerator pedal by switching the mode selector switch 2, so that the operator can select one of the modes according to his / her preference. Regardless of whether you are used to the pedal or not, you can operate the work machine with peace of mind.

  As described above, the present invention is not limited to the above embodiment. For example, another vehicle such as a hydraulic excavator may be used as a working machine to be applied, and other configurations may be appropriately changed. Also good. In any case, as long as the configuration of the claims is satisfied, even if the above configuration is changed as appropriate, it naturally belongs to the technical scope.

  The present invention is applicable to work machines such as a hydraulic excavator and a bulldozer.

1 Governor controller (governor adjustment control device)
2 Mode selector switch (switching means)
3 Foot pedal
4 Engine governor

Claims (1)

A governor adjustment control device for a work machine that inputs a depression amount value from a foot pedal and outputs a command to increase or decrease the engine speed to the engine governor according to the inputted foot pedal depression amount value,
In response to an increase in the amount of foot pedal depression, both the output of a command to increase the engine speed and the output of a command to decrease the engine speed are performed.
A governor adjustment control device for a work machine, characterized in that any one of the controls is selected in accordance with a switching command from the switching means.

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