CN108301457B - Excavator start and stop control method - Google Patents
Excavator start and stop control method Download PDFInfo
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- CN108301457B CN108301457B CN201810208853.2A CN201810208853A CN108301457B CN 108301457 B CN108301457 B CN 108301457B CN 201810208853 A CN201810208853 A CN 201810208853A CN 108301457 B CN108301457 B CN 108301457B
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- excavator
- proximity switch
- control method
- stop control
- speed
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
The invention provides a starting and stopping control method for an excavator, which comprises the steps that a pilot handle of the excavator is provided with a proximity switch; judging whether the hand of an operator approaches to a pilot handle of the excavator, if so, closing the proximity switch, otherwise, opening the proximity switch; when the approach switch is closed, the control system controls the engine speed of the excavator to a preset working speed; and after the proximity switch is switched off, further judging whether the proximity switch performs action within a preset time, if so, keeping the proximity switch, otherwise, controlling the engine speed of the excavator to be a preset idle speed by the control system. The proximity switch is arranged on the pilot handle to replace a pressure switch in the prior art, so that the cost is relatively low, the problem of flameout caused by time delay does not exist, and the engine is not easy to flameout.
Description
Technical Field
The invention relates to a control method of an engineering vehicle, in particular to a start-stop control method of an excavator.
Background
The excavator is an engineering mechanical vehicle widely used in various occasions such as building construction, mine excavation, farmland water conservancy construction and the like. During the stop operation of the excavator, although the waiting time interval is not long, the excavator needs to be frequently standby for a short time, in order to reduce oil consumption, reduce noise and prolong the service life of an engine, the excavator needs to reduce an accelerator and enable the engine to enter an idle state when in standby, and the process is generally controlled by adopting an idle start-stop control technology.
The existing excavator idling start-stop control technology generally adopts the following method: when the engine is kept for a certain time in an idle state, controlling the rotating speed of the engine to be reduced to an idle rotating speed; when the engine is loaded, automatically controlling the rotating speed of the engine to return to the set working rotating speed; in the process, the judgment of the no-load state or the loading state of the engine is realized according to the induction of the pressure switch to the pilot pressure, namely when all pilot operating mechanisms return to the neutral position, the pilot pressure is kept at a zero value for a period of time, the rotating speed of the engine is automatically reduced to the idling rotating speed, and when the pressure switch monitors that the pilot pressure is greater than the zero value, the rotating speed of the engine is recovered to the target working rotating speed. Although the idling start-stop control method for the excavator can effectively reduce oil consumption, reduce noise and prolong the service life of an engine, a pressure switch for sensing pilot pressure is expensive and relatively high in cost, and a certain time delay exists in the process of detecting the pilot pressure through the pressure switch and controlling the rotating speed of the engine to return to the set working rotating speed, so that flameout is easily caused.
In view of this, the excavator start-stop control method of the present application is deeply researched, and a development of the excavator start-stop control method is made according to the scheme.
Disclosure of Invention
The invention aims to provide an excavator start-stop control method which is relatively low in cost and not easy to cause flameout.
In order to achieve the purpose, the invention adopts the following technical scheme:
a starting and stopping control method for an excavator comprises the following steps:
s1, arranging a proximity switch on a pilot handle of the excavator, wherein the proximity switch is in communication connection with a control system of the excavator;
s2, starting the excavator, judging whether the hand of the operator is close to the pilot handle of the excavator, if so, closing the proximity switch, otherwise, disconnecting the proximity switch;
s3, when the approach switch is closed, the control system controls the engine speed of the excavator to a preset working speed; and after the proximity switch is switched off, further judging whether the proximity switch performs action within a preset time, if so, keeping the proximity switch, otherwise, controlling the engine speed of the excavator to be a preset idle speed by the control system.
As a refinement of the present invention, the proximity switch includes an oscillator, a switching circuit, and an amplification output circuit connected to each other.
As an improvement of the invention, the proximity switch has an adjustment device for adjusting the sensing detection distance and the sensing sensitivity.
As a modification of the present invention, in step S3, the predetermined time is 3 seconds to 6 seconds.
As a modification of the present invention, in step S3, the predetermined operating rotational speed is 2200 rpm and the predetermined idle rotational speed is 900 rpm.
By adopting the technical scheme, the invention has the following beneficial effects:
1. the proximity switch is arranged on the pilot handle to replace a pressure switch in the prior art, so that the cost is relatively low, the problem of flameout caused by time delay does not exist, and the engine is not easy to flameout.
2. The control method is easy to realize, and not only can be used for newly produced excavators, but also can be applied to the existing excavators by modifying the existing excavators.
Drawings
FIG. 1 is a flow chart of the excavator start-stop control method of the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
The excavator start and stop control method provided by the embodiment comprises the following steps:
and S1, arranging a proximity switch on the pilot handle of the excavator, and communicating and connecting the proximity switch with the control system of the excavator. The pilot handle and control system are components or systems found on existing excavators and will not be described in detail herein.
The proximity switch comprises an oscillator, a switch circuit and an amplification output circuit which are connected with each other, the proximity switch is provided with a regulating device for regulating induction detection distance and induction sensitivity, the proximity switch can be directly obtained from the market, in the embodiment, the model of the proximity switch is LP-18N8C or LP-18P8C, the proximity switch is cylindrical, the diameter of the proximity switch is 18mm, the induction distance is 8mm, the power supply is DC10-30v, and the proximity switch is a direct current three-wire inductive proximity switch with NPN and PNP outputs.
Of course, step S1 needs to be completed in advance at the time of use.
And S2, starting the excavator, judging whether the hand of the operator is close to the pilot handle of the excavator in real time through the proximity switch as shown in figure 1, if so, closing the proximity switch, otherwise, opening the proximity switch. That is, no matter the engine of the excavator is in a normal operating state or an idle state, no matter whether the hand of the operator is close to the pilot handle or far away from the pilot handle, the proximity switch judges whether the hand of the operator is close to the pilot handle, and corresponding action is executed.
And S3, when the approach switch is closed, the control system controls the engine speed of the excavator to a preset working speed, the working speed can be set according to actual requirements, and the preset working speed is 2200 rpm in the embodiment.
When the proximity switch is switched off, the control system further judges whether the proximity switch executes the action within the preset time, if so, the control system keeps the original state and does not change the engine rotating speed of the excavator, otherwise, the control system controls the engine rotating speed of the excavator to the preset idle rotating speed, so that frequent change of the engine rotating speed of the excavator can be avoided, and the service life of the engine of the excavator is prolonged. Similarly, the predetermined time and the predetermined idle speed can be set according to actual requirements, and preferably, in the embodiment, the predetermined time is 3 seconds to 6 seconds, and the predetermined idle speed is 900 rpm.
The present invention has been described in detail with reference to the specific embodiments, but the embodiments of the present invention are not limited to the above embodiments, and those skilled in the art can make various modifications to the present invention based on the prior art, and the proximity switch in the above embodiments is changed to other types of sensing devices, etc., which are within the scope of the present invention.
Claims (5)
1. The excavator start and stop control method is characterized by comprising the following steps of:
s1, arranging a proximity switch on a pilot handle of the excavator, wherein the proximity switch is in communication connection with a control system of the excavator;
s2, starting the excavator, judging whether the hand of the operator is close to the pilot handle of the excavator, if so, closing the proximity switch, otherwise, disconnecting the proximity switch;
s3, when the approach switch is closed, the control system controls the engine speed of the excavator to a preset working speed; and after the proximity switch is switched off, further judging whether the proximity switch performs action within a preset time, if so, keeping the proximity switch, otherwise, controlling the engine speed of the excavator to be a preset idle speed by the control system.
2. The excavator start stop control method of claim 1 wherein the proximity switch comprises an oscillator, a switching circuit and an amplified output circuit connected to each other.
3. The excavator start stop control method as claimed in claim 1, wherein the proximity switch has an adjusting means for adjusting the sensing detection distance and the sensing sensitivity.
4. The excavator start/stop control method as claimed in claim 1, wherein the predetermined time is 3 seconds to 6 seconds in step S3.
5. The excavator start stop control method as claimed in claim 1, wherein in step S3, the predetermined operating speed is 2200 rpm and the predetermined idle speed is 900 rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810208853.2A CN108301457B (en) | 2018-03-14 | 2018-03-14 | Excavator start and stop control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810208853.2A CN108301457B (en) | 2018-03-14 | 2018-03-14 | Excavator start and stop control method |
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| Publication Number | Publication Date |
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| CN108301457A CN108301457A (en) | 2018-07-20 |
| CN108301457B true CN108301457B (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810208853.2A Active CN108301457B (en) | 2018-03-14 | 2018-03-14 | Excavator start and stop control method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103938670A (en) * | 2013-01-18 | 2014-07-23 | 斗山工程机械（中国）有限公司 | Control device and method for excavator |
| CN105112588A (en) * | 2015-09-26 | 2015-12-02 | 柳州钢铁股份有限公司 | Display device for mud charging quantity of blast furnace mud gun |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4169499B2 (en) * | 2001-09-12 | 2008-10-22 | Ｔｃｍ株式会社 | Cylinder speed control device for cargo handling vehicles |
| JP5037570B2 (en) * | 2009-07-02 | 2012-09-26 | 日立建機株式会社 | Work machine |
| CN101666105B (en) * | 2009-07-08 | 2011-08-10 | 北汽福田汽车股份有限公司 | Method for controlling rising velocity of movable arm of excavator, control system and excavator |
| US20140003900A1 (en) * | 2011-03-15 | 2014-01-02 | Hitachi Construction Machinery Co., Ltd. | Wheel loader |
| CN102383453B (en) * | 2011-08-16 | 2013-06-05 | 浙江大学 | Automatic idle speed control method of hybrid power excavating machine |
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2018
- 2018-03-14 CN CN201810208853.2A patent/CN108301457B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103938670A (en) * | 2013-01-18 | 2014-07-23 | 斗山工程机械（中国）有限公司 | Control device and method for excavator |
| CN105112588A (en) * | 2015-09-26 | 2015-12-02 | 柳州钢铁股份有限公司 | Display device for mud charging quantity of blast furnace mud gun |
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| CN108301457A (en) | 2018-07-20 |
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