CN113550833B - Initial starting rotating speed control method for excavator engine based on oil balance - Google Patents
Initial starting rotating speed control method for excavator engine based on oil balance Download PDFInfo
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- CN113550833B CN113550833B CN202111009762.4A CN202111009762A CN113550833B CN 113550833 B CN113550833 B CN 113550833B CN 202111009762 A CN202111009762 A CN 202111009762A CN 113550833 B CN113550833 B CN 113550833B
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- engine
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- oil
- cooling liquid
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000010705 motor oil Substances 0.000 claims abstract description 47
- 239000000110 cooling liquid Substances 0.000 claims abstract description 37
- 239000003921 oil Substances 0.000 claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 239000002826 coolant Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 12
- 230000006870 function Effects 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 abstract description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
- F02D31/001—Electric control of rotation speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/023—Temperature of lubricating oil or working fluid
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Operation Control Of Excavators (AREA)
Abstract
An excavator engine initial starting rotating speed control method based on oil balance is characterized in that the rotating speed and power output of an engine are controlled by cooling liquid and engine oil temperature signals of the engine, the temperature signals are divided into three stages, and the engine cannot be started when the cooling liquid and engine oil are low in temperature in the first stage; in the second stage, when the temperature of the cooling liquid and the engine oil is in the middle range, the engine can be started, but the output rotating speed and the output power are limited; and in the third stage, the temperature of the cooling liquid and the engine oil is larger than a set value, the engine can output full power and full rotation speed, the rotation speed of the initial starting of the engine is controlled by monitoring the current environment temperature, the abrasion between rotating parts in the engine is reduced, and the aim of prolonging the overhaul service life of the engine is fulfilled.
Description
Technical Field
The invention relates to the technical field of hydraulic excavator rotation speed control, in particular to an excavator engine initial starting rotation speed control method based on oil balance.
Background
The engine speed of the hydraulic excavator is controlled to be in a constant speed control mode, the gear number value of the accelerator knob directly corresponds to the output speed of the engine, the engine works at the highest gear under most working conditions, namely the maximum speed is output, a driver directly rotates to the highest gear after starting up, and the engine is output at full speed.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing the initial starting rotating speed control method of the excavator engine based on oil balance, which is simple to operate and good in effect.
The invention is realized by the following technical scheme: the engine initial starting rotating speed control method of the excavator based on oil balance comprises an engine rotating speed control method based on oil temperature balance in a normal state and an engine rotating speed control method in a special state, wherein an engine ECM is respectively connected with a cooling liquid temperature sensor and an engine oil temperature sensor, a numerical range of the cooling liquid temperature T1 and the engine oil temperature T2 is set, and the engine is operated in a low idle state after being started in the numerical range and is further provided with a sealing switch;
in a normal state, the method comprises the following steps:
s1, before starting, if an engine ECM detects that the temperature of cooling liquid and engine oil is smaller than the temperature value of oil in the minimum starting requirement, the ECM controls the engine to be unable to start, and prompts a driver that the engine needs to be preheated at an instrument panel;
s2, when the coolant temperature sensor and the engine oil temperature sensor detect that the values of the coolant temperature T1 and the engine oil temperature T2 reach a set value range, the engine ECM controls the engine to start normally according to the acquired data, but the output power and the output rotating speed are limited, and the engine operates in a low idle state after being started;
s3, when the coolant temperature sensor and the engine oil temperature sensor detect that the values of the coolant temperature T1 and the engine oil temperature T2 exceed a set value range, the engine ECM controls the engine to keep full power and rotate speed output according to the acquired data;
under the special state, the rotating speed of the engine after being started is not controlled by the preset logic corresponding relation of the ECM, the sealing switch is activated, the output rotating speed is immediately controlled by the accelerator knob, and the full rotating speed and the full power output mode are maintained.
It is further: the numerical range of the temperature T1 of the cooling liquid is 60 ℃ more than T1 and more than or equal to 0 ℃, and the numerical range of the temperature T2 of the engine oil is 20 ℃ more than T2 and more than or equal to-25 ℃.
In the step S1, when the temperature T1 of the cooling liquid is less than 0 ℃ and the temperature of engine oil is less than-25 ℃, the ECM module controls the engine to be unable to start, and an extremely cold sign is displayed on a monitoring panel to prompt a driver to start a preheating function.
In the step S2, when the temperature T1 of the cooling liquid is more than or equal to 0 ℃ and the temperature T2 of the engine oil is more than or equal to-25 ℃, the engine control panel prompts that the engine can be started, but the rotation speed output and the power output are limited.
In the step S3, when the temperature T1 of the cooling liquid is more than or equal to 60 ℃ and the temperature T2 of the engine oil is more than or equal to 20 ℃, the rotating speed and the power output of the engine are not limited.
When the engine runs in a low idle state, the rotating speed n=800 rpm, and the maximum output torque is T c ＝0.25T max 。
In a special state, each time the sealing switch is activated, data is recorded in an engine ECM data memory for later debugging of the data.
After the seal switch is activated, the engine ECM will record the time and status that the driver activated the seal switch. The invention has the following advantages: according to the excavator engine initial starting rotation speed control method based on oil balance, before starting, an engine ECM control module acquires the temperature of cooling liquid and the temperature signal of engine oil in real time, and judges whether an engine can be started or whether the engine can be subjected to full rotation speed and full power output after starting through internal logic operation, so that the aim of controlling the initial starting rotation speed of the engine, reducing abrasion among rotating parts in the engine and prolonging the overhaul life of the engine is achieved by monitoring the current environment temperature.
Drawings
FIG. 1 is a logic control schematic of the present invention;
FIG. 2 is a graph of coolant temperature as a function of engine speed and power output in accordance with the present invention;
FIG. 3 is a graph of engine oil temperature as a function of engine speed power output;
Detailed Description
The method for controlling the initial starting rotating speed of the excavator engine based on oil balance as shown in fig. 1 to 3 comprises an engine rotating speed control method based on oil temperature balance in a normal state and an engine rotating speed control method in a special state, wherein an engine ECM is respectively connected with a cooling liquid temperature sensor and an engine oil temperature sensor, numerical ranges of the cooling liquid temperature T1 and the engine oil temperature T2 are set for controlling the power of the engine, numerical values at two ends of the numerical ranges are respectively boundary points of the initial starting and the full power starting of the engine, the engine is operated in a low idle state after being started in the numerical ranges, and a sealing switch is further arranged for controlling the rotating speed through an accelerator knob in the special state;
in a normal state, the method comprises the following steps:
s1, before starting, if an engine ECM detects that the temperature of cooling liquid and engine oil is smaller than the temperature value of oil in the minimum starting requirement, the ECM controls the engine to be unable to start, and prompts a driver that the engine needs to be preheated at an instrument panel;
s2, when the coolant temperature sensor and the engine oil temperature sensor detect that the values of the coolant temperature T1 and the engine oil temperature T2 reach a set value range, the engine ECM controls the engine to start normally according to the acquired data, but the output power and the output rotating speed are limited, and the engine operates in a low idle state after being started; the engine operates in a low idle state after being started in a normal state, the control logic unit collects a current cooling liquid temperature signal and an engine oil temperature signal, compares the current cooling liquid temperature signal with a temperature tachometer value, and outputs a target rotating speed, and in the state, the rotating speed signal priority value of an accelerator knob is lower than a signal set by an ECM (electronic control module), when the temperature of cooling liquid is 60 ℃ to be more than or equal to 0 ℃ and 20 ℃ to be more than or equal to T2 to be more than or equal to-25 ℃, the engine can be started normally, but the output power and the output rotating speed are limited;
s3, when the coolant temperature sensor and the engine oil temperature sensor detect that the values of the coolant temperature T1 and the engine oil temperature T2 exceed a set value range, the engine ECM controls the engine to keep full power and rotate speed output according to the acquired data; when the temperature T1 of the cooling liquid is more than or equal to 60 ℃ and T2 is more than or equal to 20 ℃, the engine can keep full power and rotational speed output;
in a special state, when the engine is started in an emergency and is output at full speed and full power, the rotating speed of the engine after the engine is started is not controlled by a logic corresponding relation preset by an ECM, a driver needs to activate a sealing switch, and after the engine is started in the state, the output rotating speed is immediately controlled by an accelerator knob and the full rotating speed and the full power output mode are maintained; each time the driver activates the sealing switch, data are recorded in an engine ECM data memory for later debugging the data;
the working principle is as follows:
1. before the engine is started, an ignition switch is electrified, an internal sensor (an engine oil temperature sensor and a cooling liquid temperature sensor) of the engine detects the temperature of the current oil, the starting condition is judged through logic operation of an ECM (engine control module) of the engine, when the cooling liquid temperature T1 of the engine is less than 0 ℃ and the engine oil temperature T2 is less than-25 ℃, the ECM module controls the engine to be unable to start, and an extremely cold sign is displayed on a monitoring panel to prompt a driver to start a preheating function;
2. when the engine enters a preheating program, the temperature of the cooling liquid and the temperature of engine oil gradually rise, and when the temperature T1 of the cooling liquid is more than or equal to 0 ℃ and the temperature T2 of the engine oil is more than or equal to-25 ℃, the engine control panel prompts that the engine can be started, but the rotation speed output and the power output are limited, namely the engine can only run at an idle rotation speed, the rotation speed n=800 rpm, and the maximum output torque is T c ＝0.25T max At this time, the driver can start the engine or wait for the oil temperature to continuously rise until the next stage is activated;
3. when the engine is preheated or fuel is started to release heat, the temperature of the cooling liquid and the temperature of the engine oil are continuously increased, and when the temperature T1 of the cooling liquid is more than or equal to 60 ℃ and the temperature T2 of the engine oil is more than or equal to 20 ℃, the rotating speed and the power output of the engine are not limited;
in the emergency starting under the special state, only the driver is required to activate the sealing switch, the starting and output rotating speed and torque of the engine are not limited, and the situation is set as dangerous situation and the machine is required to be started and operated. The engine ECM control module will record the time and status of the driver activating the sealing switch.
According to the excavator engine initial starting rotation speed control method based on oil balance, before starting, an engine ECM control module collects cooling liquid temperature and engine oil temperature signals in real time, whether an engine can be started or whether the engine can be output at full rotation speed and full power after being started is judged through internal logic operation, specifically, the cooling liquid and engine oil temperature signals of the engine are used for controlling the rotation speed and the power output of the engine, the temperature signals are divided into three stages, and when the cooling liquid and engine oil temperature is very low, the engine cannot be started in the first stage; in the second stage, when the temperature of the cooling liquid and the engine oil is in the middle range, the engine can be started, but the output rotating speed and the output power are limited; in the third stage, the temperature of the cooling liquid and the engine oil is higher than a set value, the engine can output at full power and full rotation speed, and meanwhile, the use of the sealing switch can provide safety guarantee for the starting of the engine in a special state.
Claims (4)
1. An excavator engine initial starting rotating speed control method based on oil balance is characterized in that: the engine ECM is respectively connected with a cooling liquid temperature sensor and an engine oil temperature sensor, and is provided with a numerical range of a cooling liquid temperature T1 and an engine oil temperature T2, wherein the engine is operated in a low idle state after being started in the numerical range, and a sealing switch is also arranged;
in a normal state, the method comprises the following steps:
s1, before starting, if an engine ECM detects that the temperature of cooling liquid and engine oil is smaller than the temperature value of oil in the minimum starting requirement, the ECM controls the engine to be unable to start, and prompts a driver that the engine needs to be preheated at an instrument panel;
s2, when the coolant temperature sensor and the engine oil temperature sensor detect that the values of the coolant temperature T1 and the engine oil temperature T2 reach a set value range, the engine ECM controls the engine to start normally according to the acquired data, but the output power and the output rotating speed are limited, and the engine operates in a low idle state after being started;
s3, when the coolant temperature sensor and the engine oil temperature sensor detect that the values of the coolant temperature T1 and the engine oil temperature T2 exceed a set value range, the engine ECM controls the engine to keep full power and rotate speed output according to the acquired data;
under a special state, the rotating speed of the engine after the engine is started is not controlled by a logic corresponding relation preset by an ECM, a sealing switch is activated, the output rotating speed is immediately controlled by an accelerator knob, and the full rotating speed and a full power output mode are maintained;
the numerical range of the temperature T1 of the cooling liquid is 60 ℃ more than T1 and more than or equal to 0 ℃, and the numerical range of the temperature T2 of the engine oil is 20 ℃ more than T2 and more than or equal to-25 ℃;
when the engine runs in a low idle state, the rotating speed n=800 rpm, and the maximum output torque is T c ＝0.25T max ；
In a special state, when the sealing switch is activated each time, data are recorded in an engine ECM data memory for later debugging data;
after the seal switch is activated, the engine ECM will record the time and status that the driver activated the seal switch.
2. The method for controlling the initial starting rotating speed of the engine of the excavator based on oil balance as claimed in claim 1, wherein the method comprises the following steps: in the step S1, when the temperature T1 of the cooling liquid is less than 0 ℃ and the temperature T2 of the engine oil is less than-25 ℃, the ECM module controls the engine to be unable to start, and an extremely cold sign is displayed on a monitoring panel to prompt a driver to start a preheating function.
3. The method for controlling the initial starting rotating speed of the engine of the excavator based on oil balance as claimed in claim 1, wherein the method comprises the following steps: in the step S2, when the temperature T1 of the cooling liquid is more than or equal to 0 ℃ and the temperature T2 of the engine oil is more than or equal to-25 ℃, the engine control panel prompts that the engine can be started, but the rotation speed output and the power output are limited.
4. The method for controlling the initial starting rotating speed of the engine of the excavator based on oil balance as claimed in claim 1, wherein the method comprises the following steps: in the step S3, when the temperature T1 of the cooling liquid is more than or equal to 60 ℃ and the temperature T2 of the engine oil is more than or equal to 20 ℃, the rotating speed and the power output of the engine are not limited.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111009762.4A CN113550833B (en) | 2021-08-31 | 2021-08-31 | Initial starting rotating speed control method for excavator engine based on oil balance |
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| CN202111009762.4A CN113550833B (en) | 2021-08-31 | 2021-08-31 | Initial starting rotating speed control method for excavator engine based on oil balance |
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| CN113550833A CN113550833A (en) | 2021-10-26 |
| CN113550833B true CN113550833B (en) | 2024-02-02 |
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| CN108398762B (en) * | 2018-05-04 | 2024-04-23 | 徐州工程学院 | Laser beam expander adjusting device |
| CN114810386B (en) * | 2022-04-07 | 2023-06-23 | 潍柴动力股份有限公司 | Engine start control method and system considering load output |
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2021
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| JP2002168169A (en) * | 2000-12-01 | 2002-06-14 | Honda Motor Co Ltd | Control device for internal combustion engine |
| CN202273263U (en) * | 2011-10-01 | 2012-06-13 | 徐州徐工挖掘机械有限公司 | Automatic warming and overheating protective control device |
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