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Engine control device for construction machine

A technology of construction machinery and control devices, which is applied in engine control, machine/engine, construction, etc., and can solve problems such as longer engine running time

Inactive Publication Date: 2006-03-22
KOBELCO CONSTR MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in reality, the appropriate reprieve time varies according to the personality of the operator, the working environment, and the shift of the operator. Therefore, if the reprieve time is too long, the useless engine running time will be prolonged. If the reprieve time is too short, frequent restarts are required

Method used

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  • Engine control device for construction machine
  • Engine control device for construction machine
  • Engine control device for construction machine

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Experimental program
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Effect test

no. 1 Embodiment approach

[0021] The first embodiment (refer to Figure 1 ~ Figure 3 )

[0022] exist figure 1 Among them, 1 is an engine as a power source, the hydraulic pump 2 is driven by the engine 1 , and the oil discharged from the pump 2 is supplied to the hydraulic actuator circuit 3 .

[0023] 4 is a remote control valve (operating body), which has a lever 4a. The control valve (not shown) in the hydraulic actuator circuit 3 is switched by the remote control pressure corresponding to the operating direction and amount of the lever 4a, and the operating direction of hydraulic actuators such as hydraulic cylinders or hydraulic motors is controlled. and speed control.

[0024] The controller 5 is provided with: an engine control mechanism that controls the operation / stop of the engine 1 via the governor control unit 6, that is, an engine control unit 7; a pressure sensor 8 provided on the remote control valve 4; The signal of 8 detects whether the remote control valve 4 has been operated (ope...

Embodiment approach

[0060] (1) As a modification of both the first and second embodiments, the maximum value and the minimum value may be removed from the latest past n door lever opening times T1, and the average value TR may be obtained from the remaining values.

[0061] (2) As another variation of the first and second embodiments, the delay time T2 may be calculated using a function of the average value TR of the latest n past door lever opening times T1.

[0062] (3) In each of the above-mentioned embodiments, the door lever opening time T1 or the number of times N of opening per unit time is used as the data of the power-free state, but other data (such as the time or the number of times when the remote control valve 4 is not operated) can also be used.

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Abstract

An engine control device for a construction machine of the present invention is configured so that an engine (1) is automatically stopped by an engine controller (7) under the condition that a remote control valve (4) is not operated, an allowance time has passed and a gate lever (10) for opening and closing a gateway for an operator is opened, and in which an average value of the last gate lever opening times is obtained and the allowance time is automatically set based on the average value.

Description

technical field [0001] The present invention relates to an engine control device for a construction machine having a function of automatically stopping the engine. Background technique [0002] In the prior art, Japanese Patent Laid-Open No. 2000-96627 and Japanese Patent Laid-Open No. 2001-41069 disclose a kind of automatic stop condition (for example, opening and closing of the cockpit entrance) that has been set in advance. A construction machine with an automatic stop function that automatically stops the engine when the operating lever of the operating actuator is not operated. [0003] In addition, if the engine is stopped while the automatic stop condition is satisfied, the engine will also be automatically stopped when the operator temporarily gets off the vehicle for a short walk or a conversation, for example, so that the subsequent restart operation is very troublesome. Therefore, a technique has been proposed in which a delay time is set, and the engine is stopp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D29/00F02D29/02E02F9/20F02D17/00F02D17/04
CPCE02F9/20F02D17/04
Inventor 加门嘉树三此木光一
Owner KOBELCO CONSTR MASCH CO LTD