CN117738806A - Engine speed-up protection system and method and excavator - Google Patents
Engine speed-up protection system and method and excavator Download PDFInfo
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- CN117738806A CN117738806A CN202410002337.XA CN202410002337A CN117738806A CN 117738806 A CN117738806 A CN 117738806A CN 202410002337 A CN202410002337 A CN 202410002337A CN 117738806 A CN117738806 A CN 117738806A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000010705 motor oil Substances 0.000 claims abstract description 54
- 239000000110 cooling liquid Substances 0.000 claims abstract description 30
- 239000002828 fuel tank Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000002283 diesel fuel Substances 0.000 claims abstract description 18
- 239000000295 fuel oil Substances 0.000 claims abstract description 15
- 239000002826 coolant Substances 0.000 claims description 10
- 239000000446 fuel Substances 0.000 claims description 7
- 239000003921 oil Substances 0.000 claims description 7
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Abstract
The invention discloses an engine speed-up protection system, an engine speed-up protection method and an excavator, which comprise an engine oil temperature sensor, a cooling liquid temperature sensor and a fuel oil temperature sensor, wherein the engine oil temperature sensor is used for collecting the engine oil temperature of an engine oil pan; the whole machine controller is respectively connected with the engine oil temperature sensor, the cooling liquid temperature sensor and the fuel oil temperature sensor, and is used for collecting the engine oil temperature of the engine oil pan, the cooling liquid temperature of the radiator water tank and the temperature information of diesel oil in the fuel tank and comparing the lowest temperature T of the engine oil temperature, the cooling liquid temperature of the radiator water tank and the temperature information of the diesel oil in the fuel tank min The method comprises the steps of carrying out a first treatment on the surface of the When the excavator is in a cold and hot state, the whole machine controller is controlled according to T min Temperature interval or T min And the temperature T of the air at the moment air And sending a rotating speed control instruction to an engine controller by the difference relation to control the engine to start an up-speed protection mode. The invention prevents the damage caused by the fact that the rotation speed of the engine is increased immediately after the excavator is started, and improves the reliability of a power system.
Description
Technical Field
The invention relates to an engine speed-up protection system and method and an excavator, and belongs to the technical field of excavators.
Background
Before the excavator works, the engine needs to be fully pre-operated (idle running for 3-5 minutes) to ensure that the lubricating oil fills each lubricating part. Since there is no forced limitation measure, part of drivers immediately raise the engine speed to start working or set to a high gear due to misoperation after the excavator is started, and engine oil does not fully reach all parts in the engine at this time, so that abnormal abrasion of internal parts of the engine is easily caused.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an engine speed-up protection system, an engine speed-up protection method and an excavator, which are used for preventing parts from being damaged due to the fact that the rotation speed of the engine is immediately increased after the excavator is started, and improving the reliability of a power system.
In order to achieve the above object, the present invention provides an engine speed-up protection system comprising:
the temperature sensor comprises an engine oil temperature sensor, a cooling liquid temperature sensor and a fuel oil temperature sensor, wherein the engine oil temperature sensor is used for collecting the engine oil temperature of an engine oil pan, the cooling liquid temperature sensor is used for collecting the cooling liquid temperature of a radiator water tank, and the fuel oil temperature sensor is used for collecting the temperature of diesel oil in a fuel tank;
the whole machine controller is respectively connected with the engine oil temperature sensor, the cooling liquid temperature sensor and the fuel oil temperature sensor, and is used for collecting engine oil temperature of an engine oil pan, cooling liquid temperature of a radiator water tank and diesel oil temperature information in a fuel tank collected by the temperature sensors and comparing the lowest temperature T of the engine oil temperature, the cooling liquid temperature of the radiator water tank and the diesel oil temperature information in the fuel tank min ；
The engine controller is respectively connected with the whole machine controller and the engine, and when the excavator is in a cold and hot state, the whole machine controller is connected with the engine according to T min Temperature interval or T min And the temperature T of the air at the moment air Difference relation, forwardThe engine controller sends a rotating speed control instruction to control the engine to start a speed-up protection mode.
As an improvement, the intelligent monitoring system also comprises an instrument display device connected with the whole machine controller, wherein the instrument display device is used for displaying warning information.
As an improvement, the engine oil temperature sensor is installed on an engine oil pan, the coolant temperature sensor is installed on a radiator tank, and the fuel oil temperature sensor is installed on a fuel tank.
As an improvement, when the time interval t between the starting up of the equipment and the normal working and stopping of the equipment at last time is more than the time preset value delta t, the equipment is in a cold state;
and when the time interval t between the starting up of the equipment and the normal working and stopping of the equipment last time is less than the time preset value delta t, the equipment is in a heat engine state.
In addition, the invention also provides an excavator, and the engine speed-up protection system is arranged on the excavator.
Finally, the invention also provides an engine speed-up protection method, which adopts the engine speed-up protection system and comprises the following steps:
s1, a complete machine controller collects engine oil temperature of an engine oil pan, cooling liquid temperature of a radiator water tank and diesel oil temperature information in a fuel tank, which are collected by all temperature sensors, and compares the lowest temperature T of the engine oil pan, the cooling liquid temperature of the radiator water tank and the diesel oil temperature information min ；
S2, the whole machine controller collects the time interval T between the starting time of the equipment and the normal working and stopping time of the last time of the equipment, compares the time interval T with a time preset value delta T, and passes through T according to the relation between T and delta T min Temperature interval or T min And the temperature T of the air at the moment air The difference relation sends a rotating speed control instruction to an engine controller to perform different engine speed-up control protection;
the normal operation and shutdown of the previous equipment means that the equipment is in a temperature balance state when the equipment is in normal operation and continuously works for more than a certain time.
As an improvement, under the condition of t > Δt:
when T is min When the temperature is less than 0 ℃, the low rotation speed maintaining time t of the engine is forced 1 Only the first engine ramp up is then resumed at a speed of 30rpm/125 ms;
when the temperature is less than or equal to 0 ℃ T min Forcing the engine to maintain a low rotational speed for a time t at a temperature of less than or equal to 20 DEG C 2 Only the first engine ramp up is then resumed at a speed of 30rpm/125 ms;
when the temperature is less than 20 ℃ and less than T min At the time, the low rotation speed of the engine is forced to maintain for a time t 3 Only the first engine ramp up is then resumed at a speed of 30rpm/125 ms;
the t is 1 ＞t 2 ＞t 3 。
As an improvement, the low rotational speed is an engine safe rotational speed.
As an improvement, under the condition of t < Δt:
when T is min -T air When the temperature is more than 15 ℃, the excavator only starts up to recover the rotation speed at the speed of 30rpm/125ms for the first time after starting up, and then works normally;
when T is min -T air When the temperature is less than or equal to 15 ℃, the low rotation speed maintaining time t of the engine is forced 3 Only the first engine ramp up is then resumed at a speed of 30rpm/125 ms.
As an improvement, the low rotational speed is an engine safe rotational speed.
Compared with the prior art, the engine speed-up protection system takes the lowest temperature of the cooling liquid, the fuel oil and the engine oil as the starting protection judgment standard of the engine, avoids misjudgment, judges in a grading way according to the section where the lowest temperature is, and adopts different modes to perform starting protection; the adjacent shutdown and startup time intervals are compared with the atmospheric temperature, and the starting protection is judged in a grading manner, so that the damage caused by the fact that the engine rotating speed is immediately increased after the excavator is started is prevented, and the reliability of a power system is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the principle structure of the present invention;
FIG. 2 is a flow chart of the present invention.
Detailed Description
The present invention will be described in further detail below in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
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, and the terms used herein in this description of the invention are for the purpose of describing particular embodiments only and are not intended to be limiting of the invention.
As shown in fig. 1 and 2, an engine speed-up protection system includes:
the temperature sensor comprises an engine oil temperature sensor, a cooling liquid temperature sensor and a fuel oil temperature sensor, wherein the engine oil temperature sensor is used for collecting the engine oil temperature of an engine oil pan, the cooling liquid temperature sensor is used for collecting the cooling liquid temperature of a radiator water tank, and the fuel oil temperature sensor is used for collecting the temperature of diesel oil in a fuel tank;
the whole machine controller is respectively connected with the engine oil temperature sensor, the cooling liquid temperature sensor and the fuel oil temperature sensor, and is used for collecting engine oil temperature of an engine oil pan, cooling liquid temperature of a radiator water tank and diesel oil temperature information in a fuel tank collected by the temperature sensors and comparing the lowest temperature T of the engine oil temperature, the cooling liquid temperature of the radiator water tank and the diesel oil temperature information in the fuel tank min ；
The engine controller is respectively connected with the whole machine controller and the engine, and when the excavator is in a cold and hot state, the whole machine controller is connected with the engine according to T min Temperature interval or T min And the temperature T of the air at the moment air And sending a rotating speed control instruction to an engine controller by the difference relation to control the engine to start an up-speed protection mode.
As an improvement of the embodiment, as shown in fig. 1, the excavator further comprises an instrument display device connected with the whole machine controller, and when the excavator is in a cold and hot state and starts up to perform the speed-up protection, the instrument display device displays a word in the startup protection; after the lift-off protection is released, the typeface disappears.
As an improvement of the embodiment, the engine oil temperature sensor is arranged on the engine oil pan, the cooling liquid temperature sensor is arranged on the radiator water tank, and the fuel oil temperature sensor is arranged on the fuel tank, so that the engine oil temperature of the engine oil pan, the cooling liquid temperature of the radiator water tank and the temperature information of diesel oil in the fuel tank can be collected in time.
As an improvement of the embodiment, when the time interval t between the starting up of the present equipment and the normal working and stopping of the last time of the equipment is more than the time preset value delta t, the equipment is in a cold state; and when the time interval t between the starting up of the equipment and the normal working and stopping of the equipment last time is less than the time preset value delta t, the equipment is in a heat engine state. According to the invention, the stop time interval is used as a basis for judging the cold and the hot, and the engine is started in the state of the hot engine, so that the temperature of the oil is higher, the fluidity is better, the metal wall oil film required to be lubricated is better, and the engine is more friendly to work. And the cold machine is opposite to the cold machine, so the cold machine start protection measures are more severe.
Finally, the invention also provides an excavator, and the engine speed-up protection system is arranged on the excavator.
Example 1
The engine speed-up protection method adopts the engine speed-up protection system and comprises the following steps:
s1, collecting the engine oil temperature T of an engine oil pan by the engine oil temperature sensor oil The coolant temperature sensor collects the coolant temperature T of the radiator water tank coolant The fuel temperature sensor collects the temperature T of diesel oil in the fuel tank fuel The method comprises the steps of carrying out a first treatment on the surface of the Referring to fig. 2, after the excavator is started, the temperature values of the three sensors are transmitted to the whole machine controller, and the whole machine controller compares and reads the lowest temperature T of the three sensors min ＝{T oil ，T coolant ，T fuel }；
S2, the whole machine controller collects the time interval t between the starting up of the equipment and the normal working and stopping of the equipment last time, wherein deltat is a time preset value (for example, 5 hours), and when t is more than deltat, the excavator is in a cold state;
s3, the whole machine controller is controlled according to T min In the temperature interval, a rotating speed control instruction is sent to an engine controller to perform different engine speed-up control protection, and the method specifically comprises the following steps:
when T is min When the temperature is less than 0 ℃, the low rotation speed maintaining time t of the engine is forced 1 (e.g., 10 seconds), after which only the first engine ramp up is at 30rpm/125ms to resume speed;
when the temperature is less than or equal to 0 ℃ T min Forcing the engine to maintain a low rotational speed for a time t at a temperature of less than or equal to 20 DEG C 2 (e.g., 6 seconds), after which only the first engine ramp up is at 30rpm/125ms to resume speed;
when the temperature is less than 20 ℃ and less than T min At the time, the low rotation speed of the engine is forced to maintain for a time t 3 (e.g., 3 seconds) and then only the first engine ramp up is at 30rpm/125ms to resume speed.
Wherein the low rotation speed is an engine safe rotation speed, and is set according to the engine body, for example, not higher than 1000rpm.
The normal operation and shutdown of the equipment at the last time means that the equipment is operated normally before and continuously for more than a certain time (such as 50 min), and each temperature index of the equipment is in a temperature balance state.
Example 2
The engine speed-up protection method adopts the engine speed-up protection system and comprises the following steps:
s1, collecting the engine oil temperature T of an engine oil pan by the engine oil temperature sensor oil The coolant temperature sensor collects the coolant temperature T of the radiator water tank coolant The fuel temperature sensor collects the temperature T of diesel oil in the fuel tank fuel The method comprises the steps of carrying out a first treatment on the surface of the Referring to fig. 2, after the excavator is started, the temperature values of the three sensors are transmitted to the whole machine controller, and the whole machine controller compares and reads the lowest temperature T of the three sensors min ＝{T oil ，T coolant ，T fuel }；
S2, the whole machine controller collects the time interval t between the starting time of the equipment and the normal working and stopping time of the last time of the equipment, wherein deltat is a time preset value (for example, 5 hours), and when t is less than deltat, the excavator is in a heat engine state;
s3, the whole machine controller is used for controlling the temperature T according to Tmin and the current atmospheric temperature air The difference relation (such as 15 ℃) sends a rotating speed control instruction to an engine controller to perform different engine speed-up control protection, and the method specifically comprises the following steps:
when T is min -T air When the temperature is more than 15 ℃, the excavator only needs to recover the rotating speed at the speed of 30rpm/125ms for the first time after starting up, and then can work normally;
when T is min -T air When the temperature is less than or equal to 15 ℃, the low rotation speed maintaining time t of the engine is forced 3 (e.g., 3 seconds) and then only the first engine ramp up is at 30rpm/125ms to resume speed.
The normal operation and shutdown of the equipment at the last time means that the equipment is operated normally before and continuously for more than a certain time (such as 50 min), and each temperature index of the equipment is in a temperature balance state.
According to the engine speed-up protection system, the lowest temperature of cooling liquid, fuel oil and engine oil is used as an engine starting protection judgment standard, erroneous judgment is avoided, and starting protection is carried out in different modes according to the section where the lowest temperature is located and the grading judgment; the adjacent shutdown and startup time intervals are compared with the atmospheric temperature, and the starting protection is judged in a grading manner, so that the damage caused by the fact that the engine rotating speed is immediately increased after the excavator is started is prevented, and the reliability of a power system is improved.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features contained in other embodiments, but not others, combinations of features of different embodiments are equally meant to be within the scope of the invention and form different embodiments. For example, in the above embodiments, those skilled in the art can use the above embodiments in combination according to known technical solutions and technical problems to be solved by the present application.
Claims (10)
1. An engine speed-up protection system, comprising:
the temperature sensor comprises an engine oil temperature sensor, a cooling liquid temperature sensor and a fuel oil temperature sensor, wherein the engine oil temperature sensor is used for collecting the engine oil temperature of an engine oil pan, the cooling liquid temperature sensor is used for collecting the cooling liquid temperature of a radiator water tank, and the fuel oil temperature sensor is used for collecting the temperature of diesel oil in a fuel tank;
the whole machine controller is respectively connected with the engine oil temperature sensor, the cooling liquid temperature sensor and the fuel oil temperature sensor, and is used for collecting engine oil temperature of an engine oil pan, cooling liquid temperature of a radiator water tank and diesel oil temperature information in a fuel tank collected by the temperature sensors and comparing the lowest temperature T of the engine oil temperature, the cooling liquid temperature of the radiator water tank and the diesel oil temperature information in the fuel tank min ；
The engine controller is respectively connected with the whole machine controller and the engine, and when the excavator is in a cold and hot state, the whole machine controller is connected with the engine according to T min Temperature interval or T min And the temperature T of the air at the moment air And sending a rotating speed control instruction to an engine controller by the difference relation to control the engine to start an up-speed protection mode.
2. The engine speed-up protection system of claim 1, further comprising an instrument display device coupled to the overall controller, the instrument display device configured to display alert information.
3. The engine up-speed protection system of claim 1, wherein the oil temperature sensor is mounted on an engine oil pan, the coolant temperature sensor is mounted on a radiator tank, and the fuel temperature sensor is mounted on a fuel tank.
4. The engine speed-up protection system according to claim 1, wherein the engine is in a cold state when a time interval t between the start-up of the present equipment and the normal operation and shutdown of the last equipment is greater than a time preset value Δt;
and when the time interval t between the starting up of the equipment and the normal working and stopping of the equipment last time is less than the time preset value delta t, the equipment is in a heat engine state.
5. An excavator having the engine speed-up protection system according to any one of claims 1 to 4 mounted thereon.
6. An engine speed-up protection method, characterized in that the engine speed-up protection system according to any one of claims 1 to 4 is employed, comprising the steps of:
s1, a complete machine controller collects engine oil temperature of an engine oil pan, cooling liquid temperature of a radiator water tank and diesel oil temperature information in a fuel tank, which are collected by all temperature sensors, and compares the lowest temperature T of the engine oil pan, the cooling liquid temperature of the radiator water tank and the diesel oil temperature information min ；
S2, the whole machine controller collects the time interval T between the starting time of the equipment and the normal working and stopping time of the last time of the equipment, compares the time interval T with a time preset value delta T, and passes through T according to the relation between T and delta T min Temperature interval or T min And the temperature T of the air at the moment air The difference relation sends a rotating speed control instruction to an engine controller to perform different engine speed-up control protection;
the normal operation and shutdown of the previous equipment means that the equipment is in a temperature balance state when the equipment is in normal operation and continuously works for more than a certain time.
7. The engine speed-up protection method according to claim 6, wherein under the condition of t >. Δt:
when T is min When the temperature is lower than 0 ℃, the engine is forced to maintain low rotation speedInterval t 1 Only the first engine ramp up is then resumed at a speed of 30rpm/125 ms;
when the temperature is less than or equal to 0 ℃ T min Forcing the engine to maintain a low rotational speed for a time t at a temperature of less than or equal to 20 DEG C 2 Only the first engine ramp up is then resumed at a speed of 30rpm/125 ms;
when the temperature is less than 20 ℃ and less than T min At the time, the low rotation speed of the engine is forced to maintain for a time t 3 Only the first engine ramp up is then resumed at a speed of 30rpm/125 ms;
the t is 1 ＞t 2 ＞t 3 。
8. The engine speed-up protection method according to claim 7, wherein the low rotation speed is an engine safe rotation speed.
9. The engine speed-up protection method according to claim 6, wherein under t < Δtconditions:
when T is min -T air When the temperature is more than 15 ℃, the excavator only starts up to recover the rotation speed at the speed of 30rpm/125ms for the first time after starting up, and then works normally;
when T is min -T air When the temperature is less than or equal to 15 ℃, the low rotation speed maintaining time t of the engine is forced 3 Only the first engine ramp up is then resumed at a speed of 30rpm/125 ms.
10. The engine speed-up protection method according to claim 9, wherein the low rotational speed is an engine safe rotational speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410002337.XA CN117738806A (en) | 2024-01-02 | 2024-01-02 | Engine speed-up protection system and method and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410002337.XA CN117738806A (en) | 2024-01-02 | 2024-01-02 | Engine speed-up protection system and method and excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117738806A true CN117738806A (en) | 2024-03-22 |
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ID=90279406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410002337.XA Pending CN117738806A (en) | 2024-01-02 | 2024-01-02 | Engine speed-up protection system and method and excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117738806A (en) |
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2024
- 2024-01-02 CN CN202410002337.XA patent/CN117738806A/en active Pending
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