CN110747935A - Automatic preheating system and method for excavator - Google Patents
Automatic preheating system and method for excavator Download PDFInfo
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- CN110747935A CN110747935A CN201911025031.1A CN201911025031A CN110747935A CN 110747935 A CN110747935 A CN 110747935A CN 201911025031 A CN201911025031 A CN 201911025031A CN 110747935 A CN110747935 A CN 110747935A
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- preheating
- excavator
- engine
- temperature
- hydraulic pump
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Classifications
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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
- E02F9/22—Hydraulic or pneumatic drives
-
- 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
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
-
- 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
- E02F9/26—Indicating devices
Abstract
The invention discloses an automatic preheating system and method for an excavator, wherein the method comprises the following steps: setting the automatic preheating time of the excavator, simultaneously setting the target temperature for preheating the hydraulic oil, starting preheating, and triggering the following steps when the set time is reached; judging whether the preheating of the excavator is successful or not; if the preheating of the excavator reaches the target temperature, stopping the preheating of the excavator; if the preheating of the excavator does not reach the target temperature, the excavator is continuously preheated; wherein the actual temperature is measured by a temperature sensor. According to the invention, the excavator can be automatically preheated in advance through the automatically set program and the control unit, so that the time waste caused by the preheating of the excavator is avoided, and the labor cost is saved.
Description
Technical Field
The invention relates to the field of excavators, in particular to an automatic preheating system and method for an excavator.
Background
The existing excavator has no function of automatic preheating in advance, and the working device is manually operated after the engine needs to be started before the excavator works, so that the hydraulic system overflows to increase the temperature of hydraulic oil, the manual consumption is high, and the preheating time is long. When the existing excavator is preheated, in order to improve the preheating efficiency, the engine is usually modulated to a maximum gear, the working device is operated manually and continuously, and meanwhile, the hydraulic oil is overflowed and preheated. The driver needs to manually warm up after getting on the vehicle.
The inventor thinks that the existing manual preheating mode has long preheating time and large manual consumption when the outdoor temperature is low. If the preheating is not carried out, the temperature of hydraulic oil is low, the viscosity is high, the pressure loss of a system is high, a hydraulic element cannot be well lubricated, the abrasion of the hydraulic element is serious, and the efficiency is reduced.
Disclosure of Invention
Aiming at the defects of the existing excavator preheating method, the invention aims to provide an excavator automatic preheating system and method, which can lead the excavator to be automatically preheated in advance through an automatically set program and a control unit, avoid time waste caused by the preheating of the excavator and save labor cost.
The invention aims to provide an automatic preheating method for an excavator.
The second purpose of the invention is to provide an electronic control unit for automatic preheating of the excavator.
The third purpose of the invention is to provide an automatic engine preheating system.
In order to realize the purpose, the invention discloses the following technical scheme:
the invention discloses an automatic preheating method for an excavator, which comprises the following steps:
setting the automatic preheating time of the excavator, simultaneously setting the target temperature for preheating the hydraulic oil, starting preheating, and triggering the following steps when the set time is reached;
judging whether the preheating of the excavator is successful or not;
if the preheating of the excavator reaches the target temperature, stopping the preheating of the excavator; if the preheating of the excavator does not reach the target temperature, the excavator is continuously preheated;
wherein the actual temperature is measured by a temperature sensor.
Further, the step of judging whether the preheating of the excavator is successful comprises the following steps:
judging whether the hydraulic pump and/or the engine is started successfully or not, and if the hydraulic pump and/or the engine is started successfully, entering the next step; if the starting is unsuccessful, sending a fault signal, maintaining, and trying to start after maintaining;
judging whether the actual preheating temperature is greater than or equal to the target temperature, and if the actual preheating temperature is greater than or equal to the target temperature, heating successfully; and if the actual preheating temperature is lower than the target temperature, determining that the preheating fails.
Further, the preheating method is that the hydraulic pump is controlled to be started, so that a hydraulic system communicated with the hydraulic pump is heated; meanwhile, controlling the engine to start to generate heat;
and when a starting instruction is detected, or the preheating time reaches a preheating time threshold value, controlling to start and stop running, and stopping heating.
Further, the judging whether the preheating of the excavator is successful comprises:
acquiring the actual preheating temperature;
judging whether the actual preheating temperature is greater than or equal to the target temperature;
if the actual preheating temperature is greater than or equal to the target temperature, heating is successful;
and if the actual preheating temperature is lower than the target temperature, determining that the preheating fails.
Further, the judging whether the preheating of the excavator is successful comprises:
after a starting command of a hydraulic pump and/or an engine is detected to be sent out, if the hydraulic pump and/or the engine is not started, determining that the preheating fails;
alternatively, after a start command for the hydraulic pump and/or the engine is issued, if a fault signal is obtained that causes the engine heating to fail, it is determined that the warm-up has failed.
Further, the judging whether the preheating of the excavator is successful further comprises:
and when the starting of the hydraulic pump and/or the engine fails, outputting corresponding alarm information according to the detected preheating fault signal of the hydraulic pump and/or the excavator.
Secondly, the invention also discloses an electronic control unit for automatically preheating the excavator, which comprises:
the display is electrically connected with the operator, the processor is connected with the display and the operator, a computer program is stored in the memory, and the processor executes the computer program to realize the following steps:
setting the automatic preheating time of the excavator, simultaneously setting the target temperature for preheating the hydraulic oil, starting preheating, and triggering the following steps when the set time is reached;
judging whether the preheating of the excavator is successful or not;
if the preheating of the excavator reaches the target temperature, stopping the preheating of the excavator; if the preheating of the excavator does not reach the target temperature, the excavator is continuously preheated;
wherein the actual temperature is measured by a temperature sensor.
Further, the processor is configured to determine whether the start of the hydraulic pump and/or the engine is successful, and specifically configured to:
after a starting command of a hydraulic pump and/or an engine is detected to be sent out, if the processor obtains that the hydraulic pump and/or the engine is not started, determining that the preheating fails;
alternatively, after a start command for the hydraulic pump and/or the engine is issued, if the processor obtains a fault signal causing the engine heating to fail, it is determined that the warm-up has failed.
The processor is an ECU.
Thirdly, the invention also discloses an automatic preheating system of the excavator, which comprises an electronic control unit, a temperature sensor, a hydraulic pump and/or an engine;
the electronic control unit is used for judging whether the preheating of the excavator is successful or not;
if the preheating of the excavator reaches the target temperature, stopping the preheating of the excavator;
if the preheating of the excavator does not reach the target temperature, the excavator is continuously preheated;
wherein the actual temperature of the excavator is measured by a temperature sensor;
the temperature sensor is arranged on the pipe wall of the hydraulic system.
Further, the electronic control unit is further configured to:
after a starting command of a hydraulic pump and/or an engine is detected to be sent out, if the processor obtains that the hydraulic pump and/or the engine is not started, determining that the preheating fails;
alternatively, after a start command for the hydraulic pump and/or the engine is issued, if the processor obtains a fault signal causing the engine heating to fail, it is determined that the warm-up has failed.
Further, the system further comprises:
and the alarm is mounted on the excavator and used for outputting corresponding alarm information according to the detected inlet air preheating fault signal of the engine under the condition that the inlet air preheating of the engine fails.
Compared with the prior art, the invention has the following beneficial effects:
1) according to the invention, through the automatically set program and the control unit, the function of automatic preheating of the excavator in advance is realized, the intellectualization of the excavator can be realized, the excavator can work according to the set temperature before working, the time waste caused by preheating of the excavator is avoided, the waiting time of excavator operators can be saved, and the labor cost is further saved.
2) According to the method, two judgment modes of judging whether the preheating of the excavator is successful or not can be used, firstly, the judgment is carried out from the starting condition of the engine and/or the hydraulic pump, and secondly, the judgment is carried out from the actual temperature of the hydraulic system, so that the working condition of the engine and/or the hydraulic pump in the preheating time can be found in time, the invalid waiting time is avoided, and the preheating efficiency is improved.
3) In the invention, the ECU of the excavator and the in-vehicle control system of the excavator are fully utilized, the difficulty of the invention in the actual manufacturing and using processes is simplified, and the popularization and the promotion of the technology are facilitated.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a flow chart of example 1,
FIG. 2 is a view of the operation panel of example 4.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As described in the background art, aiming at the defects of the existing preheating method for the excavator, the invention aims to provide an automatic preheating system and method for the excavator, which can automatically preheat the excavator in advance through an automatically set program and a control unit, avoid time waste caused by preheating the excavator, save labor cost, and further describe the invention by combining the attached drawings and the specific implementation mode.
Example 1
An automatic preheating method for an excavator, the method comprising:
setting the automatic preheating time of the excavator, simultaneously setting the target temperature for preheating the hydraulic oil, starting preheating, and triggering the following steps when the set time is reached;
judging whether the preheating of the excavator is successful or not;
if the preheating of the excavator reaches the target temperature, stopping the preheating of the excavator; if the preheating of the excavator does not reach the target temperature, the excavator is continuously preheated;
wherein the actual temperature is measured by a temperature sensor.
The preheating method comprises the steps of controlling the hydraulic pump to be started so as to heat a hydraulic system communicated with the hydraulic pump; meanwhile, controlling the engine to start to generate heat;
and when a starting instruction is detected, or the preheating time reaches a preheating time threshold value, controlling to start and stop running, and stopping heating.
The method for judging whether the preheating of the excavator is successful comprises the following steps:
judging whether the hydraulic pump and/or the engine is started successfully or not, and if the hydraulic pump and/or the engine is started successfully, entering the next step; if the starting is unsuccessful, sending a fault signal, maintaining, and trying to start after maintaining;
judging whether the actual preheating temperature is greater than or equal to the target temperature, and if the actual preheating temperature is greater than or equal to the target temperature, heating successfully; and if the actual preheating temperature is lower than the target temperature, determining that the preheating fails.
After a starting command of a hydraulic pump and/or an engine is detected to be sent out, if the hydraulic pump and/or the engine is not started, determining that the preheating fails; alternatively, after a start command for the hydraulic pump and/or the engine is issued, if a fault signal is obtained that causes the engine heating to fail, it is determined that the warm-up has failed.
When the starting of the hydraulic pump and/or the engine fails, corresponding alarm information is output according to the detected preheating fault signal of the hydraulic pump and/or the excavator.
The method for judging whether the preheating of the excavator is successful further comprises the following steps:
acquiring the actual preheating temperature;
judging whether the actual preheating temperature is greater than or equal to the target temperature;
if the actual preheating temperature is greater than or equal to the target temperature, heating is successful;
and if the actual preheating temperature is lower than the target temperature, determining that the preheating fails.
Referring to the flowchart shown in fig. 1, the method disclosed in this embodiment is dedicated to the preheating of the excavator, and as is known, the preheating of the excavator is not only the preheating of the engine as its driving system, but more importantly, because the execution unit of the excavator uses hydraulic power, the hydraulic system is also preheated to raise the power level of the hydraulic system.
In a conventional hydraulic system of an excavator, a conventional dual-pump dual-loop constant power control system is taken as an example, an overflow valve is arranged in a pipeline, and the overflow valve is an oil path pressure control valve and mainly used for preventing the system from being overloaded, protecting the safety of an oil pump and an oil path system and maintaining the pressure of the oil path system. The remote control caliber reversing valve of the overflow valve is connected with the oil tank, and the oil way can be unloaded. According to the invention, the principle of warming the vehicle in advance is to heat the vehicle by using an engine, so as to heat hydraulic oil in a hydraulic pipeline and drive a hydraulic pump to enable the hydraulic oil to run.
The implementation of this embodiment needs to rely on the temperature detection and the ECU that excavates itself, specifically, arranges the temperature sensor on the periphery of hydraulic oil pipe to be connected with the ECU electricity with the temperature sensor.
More specifically, a first pin of the ECU is communicated with the temperature sensor, a second pin of the ECU is communicated with an ignition device of the engine, so that starting and flameout of the engine are controlled, and the ECU can also send a starting or flameout instruction to the second pin through a built-in control module or an external control module.
Furthermore, the control module in the ECU can be used for controlling the temperature t measured by the temperature sensor and the set target temperature t0The current starting state is judged according to the size relationship between the heating elements, and then the current heating state is judged.
It can be understood that, before the step "judging whether the excavator warms up successfully" is carried out, firstly judging whether the engine and the hydraulic pump are normally started, and after detecting that a starting command of the hydraulic pump and/or the engine is sent out, if the hydraulic pump and/or the engine is not started, determining that the preheating fails; alternatively, after a start command for the hydraulic pump and/or the engine is issued, if a fault signal is obtained that causes the engine heating to fail, it is determined that the warm-up has failed.
When the starting of the hydraulic pump and/or the engine fails, outputting corresponding alarm information according to a detected preheating fault signal of the hydraulic pump and/or the excavator;
after the ECU detects that the engine and the hydraulic pump are normally started, whether the preheating of the excavator is successful is judged, and the method specifically comprises the following steps:
setting a target temperature t0;
Acquiring an actual temperature t measured by a temperature sensor;
judging whether the actual temperature t is greater than or equal to the target temperature t0;
If the actual temperature t is greater than or equal to the target temperature t0If yes, determining that the preheating is successful;
if the actual temperature t is less than the target temperature t0Then the preheat failure is determined.
Example 2
Embodiment 2 discloses an automatic electronic control unit who preheats of excavator, the electronic control unit includes:
the display is electrically connected with the operator, the ECU is connected with the display and the operator, a computer program is stored in the memory, and the ECU executes the computer program to realize the following steps:
setting the automatic preheating time of the excavator, simultaneously setting the target temperature for preheating the hydraulic oil, starting preheating, and triggering the following steps when the set time is reached;
judging whether the preheating of the excavator is successful or not;
if the preheating of the excavator reaches the target temperature, stopping the preheating of the excavator; if the preheating of the excavator does not reach the target temperature, the excavator is continuously preheated;
wherein the actual temperature is measured by a temperature sensor.
The ECU is configured to determine whether the start of the hydraulic pump and/or the engine is successful, and is specifically configured to:
after a starting command of a hydraulic pump and/or an engine is detected to be sent out, if the ECU obtains that the hydraulic pump and/or the engine is not started, the preheating failure is determined;
or after a starting command of the hydraulic pump and/or the engine is sent, if the ECU obtains a fault signal causing the heating failure of the engine, the preheating failure is determined.
The ECU is further specifically configured to:
acquiring an actual temperature t measured by a temperature sensor;
judging whether the actual temperature t is greater than or equal to the target temperature t0;
Judging t and t0Outputting a judgment result which comprises preheating success and preheating failure, and stopping preheating the excavator if the preheating of the excavator reaches the target temperature, namely preheating success; and if the preheating of the excavator does not reach the target temperature, namely the preheating fails, continuously preheating the excavator.
It can be understood that the display and the operator used in this embodiment are integrated, specifically, a touch display is selected, and a specific arrangement of an operation interface of the touch display is shown in fig. 2.
Example 3
An automatic preheating system of an excavator comprises an electronic control unit, a temperature sensor, a hydraulic pump and/or an engine;
the electronic control unit is used for judging whether the preheating of the excavator is successful or not;
if the preheating of the excavator reaches the target temperature, stopping the preheating of the excavator;
if the preheating of the excavator does not reach the target temperature, the excavator is continuously preheated;
wherein the actual temperature of the excavator is measured by a temperature sensor;
the temperature sensor is arranged on the pipe wall of the hydraulic system.
Further, the electronic control unit is further configured to:
after a starting command of a hydraulic pump and/or an engine is detected to be sent out, if the processor obtains that the hydraulic pump and/or the engine is not started, determining that the preheating fails;
alternatively, after a start command for the hydraulic pump and/or the engine is issued, if the processor obtains a fault signal causing the engine heating to fail, it is determined that the warm-up has failed.
Further, the system further comprises:
and the alarm is mounted on the excavator and used for outputting corresponding alarm information according to the detected inlet air preheating fault signal of the engine under the condition that the inlet air preheating of the engine fails.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An automatic preheating method for an excavator, which is characterized by comprising the following steps:
setting the automatic preheating time of the excavator, simultaneously setting the target temperature for preheating the hydraulic oil, starting preheating, and triggering the following steps when the set time is reached;
judging whether the preheating of the excavator is successful or not;
if the preheating of the excavator reaches the target temperature, stopping the preheating of the excavator; if the preheating of the excavator does not reach the target temperature, the excavator is continuously preheated;
wherein the actual temperature is measured by a temperature sensor.
2. The automatic preheating method for the excavator as claimed in claim 1, wherein the step of judging whether the excavator is preheated successfully comprises the following steps:
judging whether the hydraulic pump and/or the engine is started successfully or not, and if the hydraulic pump and/or the engine is started successfully, entering the next step; if the starting is unsuccessful, sending a fault signal, maintaining, and trying to start after maintaining;
judging whether the actual preheating temperature is greater than or equal to the target temperature, and if the actual preheating temperature is greater than or equal to the target temperature, heating successfully; and if the actual preheating temperature is lower than the target temperature, determining that the preheating fails.
3. The automatic preheating method for the excavator as claimed in claim 1, wherein the preheating method is that the hydraulic pump is controlled to be started, so that a hydraulic system communicated with the hydraulic pump is heated; meanwhile, controlling the engine to start to generate heat;
and when a starting instruction is detected, or the preheating time reaches a preheating time threshold value, controlling to start and stop running, and stopping heating.
4. The automatic preheating method for the excavator according to claim 1, wherein the step of judging whether the excavator is preheated successfully comprises the following steps:
acquiring the actual preheating temperature;
judging whether the actual preheating temperature is greater than or equal to the target temperature;
if the actual preheating temperature is greater than or equal to the target temperature, heating is successful;
and if the actual preheating temperature is lower than the target temperature, determining that the preheating fails.
5. The automatic preheating method for the excavator according to claim 1, wherein the step of judging whether the excavator is preheated successfully comprises the following steps:
after a starting command of a hydraulic pump and/or an engine is detected to be sent out, if the hydraulic pump and/or the engine is not started, determining that the preheating fails;
alternatively, after a start command for the hydraulic pump and/or the engine is issued, if a fault signal is obtained that causes the engine heating to fail, it is determined that the warm-up has failed.
6. The automatic preheating method for the excavator according to claim 4 or 5, further comprising:
and when the starting of the hydraulic pump and/or the engine fails, outputting corresponding alarm information according to the detected preheating fault signal of the hydraulic pump and/or the excavator.
7. An electronic control unit for automatic preheating of an excavator, the electronic control unit comprising:
the display is electrically connected with the operator, the processor is connected with the display and the operator, a computer program is stored in the memory, and the processor executes the computer program to realize the following steps:
setting the automatic preheating time of the excavator, simultaneously setting the target temperature for preheating the hydraulic oil, starting preheating, and triggering the following steps when the set time is reached;
judging whether the preheating of the excavator is successful or not;
if the preheating of the excavator reaches the target temperature, stopping the preheating of the excavator; if the preheating of the excavator does not reach the target temperature, the excavator is continuously preheated;
wherein the actual temperature is measured by a temperature sensor;
the processor is an ECU.
8. An automatic preheating system of an excavator is characterized by comprising an electronic control unit, a temperature sensor, a hydraulic pump and/or an engine;
the electronic control unit is used for judging whether the preheating of the excavator is successful or not;
if the preheating of the excavator reaches the target temperature, stopping the preheating of the excavator;
if the preheating of the excavator does not reach the target temperature, the excavator is continuously preheated;
wherein the actual temperature of the excavator is measured by a temperature sensor;
the temperature sensor is arranged on the pipe wall of the hydraulic system.
9. The system of claim 8, wherein the electronic control unit is further configured to:
after a starting command of a hydraulic pump and/or an engine is detected to be sent out, if the processor obtains that the hydraulic pump and/or the engine is not started, determining that the preheating fails;
alternatively, after a start command for the hydraulic pump and/or the engine is issued, if the processor obtains a fault signal causing the engine heating to fail, it is determined that the warm-up has failed.
10. The system of claim 8, further comprising:
and the alarm is mounted on the excavator and used for outputting corresponding alarm information according to the detected inlet air preheating fault signal of the engine under the condition that the inlet air preheating of the engine fails.
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CN112922075A (en) * | 2021-01-28 | 2021-06-08 | 三一重机有限公司 | Excavator control method and system and excavator |
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