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Control device of engine, control device of engine and hydraulic pump, and control device of engine, hydraulic pump, and generator motor

A technology of generator motor and control device, applied in engine control, electrical control, machine/engine, etc., can solve the problems of pump efficiency, fuel consumption and noise deterioration, etc.

Inactive Publication Date: 2010-12-01
KOMATSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the engine 2 does not operate in the low rotation range unless it is set by the fuel dial, and the pump efficiency, fuel consumption, and noise deteriorate.

Method used

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  • Control device of engine, control device of engine and hydraulic pump, and control device of engine, hydraulic pump, and generator motor
  • Control device of engine, control device of engine and hydraulic pump, and control device of engine, hydraulic pump, and generator motor
  • Control device of engine, control device of engine and hydraulic pump, and control device of engine, hydraulic pump, and generator motor

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment

[0164] First, the first embodiment will be described.

[0165] The first embodiment takes figure 1 The configuration example shown is a premise. Figure 4 , Figure 6 It is a control block diagram showing the processing content performed by the controller 6 .

[0166] Such as Figure 4 As shown, the hydraulic actuator target flow rate calculation unit 50 calculates the value of The corresponding target flow rate Qbo of the hydraulic cylinder 31 for the boom, the target flow rate Qar of the hydraulic cylinder 32 for the support arm, the target flow rate Qbk of the hydraulic cylinder 33 for the bucket, the target flow rate Qsw of the hydraulic cylinder 34 for the swing, and the target flow rate Qsw of the hydraulic cylinder 34 for the right travel The target flow rate Qcr of the cylinder 35 and the target flow rate Qcl of the hydraulic cylinder 35 for left travel.

[0167] The functional relationship 51a, 52a, 53a, 54a, 55a, 56a between the operation amount of each hydrauli...

no. 2 Embodiment

[0237] Next, a second embodiment will be described.

[0238] The structure of the construction machine 1 of the second embodiment is as follows: image 3 Assuming the configuration example shown, and figure 1 Compared with the configuration example of the above, a PTO shaft 10, a generator motor 11, an accumulator 12, an inverter 13, a rotation sensor 14, and a voltage sensor 15 are added, and the generator motor 11 functions as a motor and generates electricity.

[0239] Figure 5 , Figure 6 , Figure 7 , Figure 8 It is a control block diagram showing the processing content performed by the controller 6 .

[0240] Figure 5 is the same as that of the first embodiment Figure 4 corresponding figure, with Figure 4 The description of the repeated part is omitted.

[0241] Such as Figure 5 , Figure 6 As shown, the second embodiment is the same as the first embodiment, when the minimum value selector 65 selects the target engine speed ncom, then, below, switch to ...

no. 3 Embodiment

[0327] In the above-mentioned second embodiment, the description has been made on the premise that the hydraulic swing system rotates the upper swing body of the construction machine 1 by the hydraulic actuator (hydraulic motor). Next, a second embodiment will be described on the premise of an electric swivel system that swivels the upper swivel body of the construction machine 1 with a hydraulic actuator.

[0328] Figure 15 It is a configuration diagram of the third embodiment, showing the configuration of a construction machine 1 equipped with an electric rotating system.

[0329] as Figure 15 shown, with image 3 has the same composition as figure 1 Compared with the first embodiment, a generator motor 11, a battery 12, an inverter 13, a rotation sensor 14, and a voltage sensor 15 are added. The case where the generator motor 11 performs the motoring and generating functions is the same, and the components for rotating the upper revolving body through the electric act...

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Abstract

The invention provides a control device of engine, a control device of engine and hydraulic pump, and a control device of engine, hydraulic pump and generator motor. A working machine is operated as intended by an operator with good response and with enhanced engine efficiency, pump efficiency, and the like. A first engine target speed of rotation ncom1 conforming to a current pump target delivery flow rate Qsum is set, and when a decision is made that the current pump target delivery flow rate Qsum is higher than a predetermined flow rate (e.g. 10 (L / min)), a decision is made that operating means (41-44) are switched from nonoperating state to operating state, and a speed of rotation nM (e.g. 1400 rpm) higher than the engine idle speed of rotation nL is set as a second engine target speed of rotation ncom2. If the second engine target speed of rotation ncom2 is higher than the first engine target speed of rotation ncom1, engine speed of rotation is controlled to attain the second engine target speed of rotation ncom2.

Description

[0001] This application is an application date of October 27, 2006, the application number is 200680040292.5, and the name is "control device for engine, control device for engine and hydraulic pump, and control device for engine, hydraulic pump and generator motor" case application. technical field [0002] The present invention relates to a control device for an engine, a control device for an engine and a hydraulic pump, and a control device for an engine, a hydraulic pump, and a generator motor, and particularly to a control device used when the hydraulic pump is driven by the engine. Background technique [0003] Diesel engines are installed in construction machines such as hydraulic excavators, bulldozers, dump trucks, and wheel loaders. [0004] refer to figure 1 Briefly explain the composition of the current construction machine 1, as figure 1 As shown, a diesel engine 2 is used as a driving source to drive a hydraulic pump 3 . The hydraulic pump 3 is a variable c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D29/00F02D29/04F02D29/02E02F9/20
CPCB66F9/22F02D41/021F02D29/04F02D31/001
Inventor 森永淳河口正井上宏昭
Owner KOMATSU LTD
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