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Automatic idle speed control system of excavator

An idle speed control and excavator technology, which is applied in the field of excavator automatic idle speed control system, can solve the problems of low reliability and high manufacturing cost, and achieve the effects of simple and reliable structure, low manufacturing cost, and automatic idle speed and rotational speed recovery control.

Active Publication Date: 2012-09-19
LIUGONG CHANGZHOU MACHINERY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an excavator automatic idle speed control system with high reliability, easy manufacture and low cost, aiming at the disadvantages of low reliability and high manufacturing cost of the existing excavator automatic idle speed device

Method used

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  • Automatic idle speed control system of excavator
  • Automatic idle speed control system of excavator
  • Automatic idle speed control system of excavator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 As shown, the excavator automatic idle speed control system in this embodiment includes a throttle handle 1, a throttle pull rod 6, a throttle cable, an actuator, and a controller, wherein the actuator includes a first rocker 4, a second rocker 8 and a hydraulic cylinder. 3. There is a connection point G at one end of the first rocker 4, a first hinge point A at the other end, and a second hinge point E in the middle. The first rocker 4 is hinged with the frame 5 at the first hinge point A. One end of the second rocking bar 8 also has a connection point H, the other end has a first hinge point D, and the middle part has a second hinge point F. The second rocking bar 8 is hinged with the frame 5 at its first hinge point D, and the two The connection point G and the connection point H of the rocker are located on the same side of the line connecting the second hinge points E and F of the two rockers. The cylinder body of the hydraulic cylinder 3 is hinge...

Embodiment 2

[0025] Such as figure 2 As shown, compared with Embodiment 1, the difference lies in the hydraulic cylinder 3, the positions of the working oil chamber and the spring chamber of the hydraulic cylinder are exchanged. In this embodiment, when the working oil chamber of the hydraulic cylinder enters oil, the piston rod stretches out to increase the distance between the two connection points of the rocker, and the engine enters an idle state. When the oil is discharged from the working oil chamber of the hydraulic cylinder 3, The piston rod of the hydraulic cylinder is retracted, so that the distance between the connecting points of the rocker is shortened so that the engine is in the working state at the corresponding speed of the throttle handle. At the same time, the pipeline connected to the solenoid valve should also be adjusted accordingly, that is, when the pilot handle 11 has a manipulation action, the pressure switch is closed, the solenoid coil of the delay relay 10 is ...

Embodiment 3

[0027] Compared with Embodiment 1, the difference lies in that the positions of the first hinge point and the second hinge point on the rocker are different, and the hinge point of the rocker and the frame can be the same as the hinge point of the rocker and the hydraulic cylinder Interchange, that is, in this embodiment, the first hinge point where the rocker is hinged with the frame is located in the middle of the rocker, and the second hinge point that is hinged with the hydraulic cylinder is located at the end of the rocker. At this time, the extension of the piston rod of the hydraulic cylinder The distance between the connecting points is shortened, the engine enters the working state from the idling state, the retraction of the piston rod of the hydraulic cylinder increases the distance between the connecting points, and the engine enters the idling state from the working state. At this time, the pipeline connected to the solenoid valve As follows, that is, when the pilo...

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Abstract

The invention discloses an automatic idle speed control system of an excavator. The automatic idle speed control system of the excavator is configured to solve the problems that the reliability is not high and the construction cost is high in the existing automatic idle speed control system of the excavator. The system comprises a throttle control handle, a throttle pull rod, a throttle pull wire for connecting the throttle control handle with the throttle pull rod, an executing device which is connected with the throttle pull rod in series and is used for tightening or loosening the throttle pull wire, and a controller which is used for sending a pilot handle state of the excavator and controlling the executing device to move, wherein the executing device is a four-connecting-rod mechanism formed by two rocking rods, a hydraulic cylinder connected with the two rocking rods, and a rack hinged with the two rocking rods or other fixed parts; and automatic idle of an engine and the recovery control of a work rotating speed are realized through retracting a piston rod of the hydraulic cylinder and changing the distance between two rocking rod connecting wire points. The automatic idle speed control system of the excavator adopts the four-connecting-rod mechanism and has the advantages of simple structure, reliable performance, low manufacturing cost and the like.

Description

technical field [0001] The invention relates to throttle control of an engine, and more particularly relates to an excavator automatic idle speed control system. Background technique [0002] Excavator is flexible in construction and has high construction efficiency. It is a kind of construction machinery widely used in construction. However, excavator has frequent short-term standby time during construction. When the excavator is in the state of excavation, the accelerator of the engine is opened very large. If the excavator also keeps the engine running at a high speed when it is on standby, it will cause large fuel consumption and high use costs. Simultaneously, because it is a short-term frequent standby, the engine cannot be shut down during the standby period, because frequently shutting down and starting the engine will reduce the service life of the engine. Therefore, during the short-term standby period of the excavator, the usual practice is to reduce the throttle...

Claims

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Application Information

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IPC IPC(8): E02F9/20
Inventor 林明智邢树鑫
Owner LIUGONG CHANGZHOU MACHINERY
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