CN113847181B - Engineering machinery starting method, device and system under plateau high and cold and engineering machinery - Google Patents
Engineering machinery starting method, device and system under plateau high and cold and engineering machinery Download PDFInfo
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- CN113847181B CN113847181B CN202110991071.2A CN202110991071A CN113847181B CN 113847181 B CN113847181 B CN 113847181B CN 202110991071 A CN202110991071 A CN 202110991071A CN 113847181 B CN113847181 B CN 113847181B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
- F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
- F02N11/0833—Vehicle conditions
- F02N11/0837—Environmental conditions thereof, e.g. traffic, weather or road conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
- F02M35/10268—Heating, cooling or thermal insulating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
- F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
- F02N11/0833—Vehicle conditions
- F02N11/084—State of vehicle accessories, e.g. air condition or power steering
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The embodiment of the invention provides a starting method, a starting device and a starting system of engineering machinery in plateau high-cold environment and the engineering machinery, and relates to the technical field of engineering machinery. The method comprises the following steps: acquiring an atmospheric oxygen content value, an atmospheric temperature value and an engine coolant temperature value; determining the power-on time of an air inlet preheater and the power-on time of a starter according to the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value; acquiring a voltage value of a storage battery, controlling the air inlet preheater to heat air inlet of the engine according to the power-on time of the air inlet preheater, the power-on time of the starter and the voltage value of the storage battery, and controlling the starter to start the engine; and continuously acquiring the rotating speed value of the engine until the rotating speed value of the engine reaches a rotating speed threshold value, and controlling the starter to stop working. Compared with the prior art, the invention has the advantages of low cost, simple installation and maintenance, higher starting success rate and effective protection of the safety of the battery and the starter.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to an engineering machinery starting method under plateau high-cold, an engineering machinery starting device under plateau high-cold, an engineering machinery starting system under plateau high-cold and engineering machinery.
Background
In a plateau severe cold environment, the air inlet temperature and the coolant temperature of the engineering machinery are both low, the air inlet oxygen content is also rarer, and the starting of the engineering machinery is extremely difficult compared with a plain normal temperature environment. In the prior art, additional equipment such as an electronic turbocharger, a hydraulic pump clutch and the like is generally required to be added to assist the starting of the engine, the installation is complex, and the cost is high, so that the method has important significance in improving the starting performance of the engine, shortening the starting time of the engine, protecting the safety of elements and achieving the purpose of one-time starting success under the condition of not increasing or slightly increasing the cost.
Disclosure of Invention
The invention aims to provide a starting method, a starting device, a starting system and engineering machinery of engineering machinery in plateau and high-cold environment, and aims to solve the problems of complex installation and high cost in the prior art.
In order to achieve the above object, according to a first aspect of the present invention, there is provided a method for starting a construction machine in a highland and alpine region, the method including:
acquiring an atmospheric oxygen content value, an atmospheric temperature value and an engine coolant temperature value;
determining the power-on time of an air inlet preheater and the power-on time of a starter according to the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value;
acquiring a voltage value of a storage battery, controlling the air inlet preheater to heat air inlet of the engine according to the power-on time of the air inlet preheater, the power-on time of the starter and the voltage value of the storage battery, and controlling the starter to start the engine;
and continuously acquiring the rotating speed value of the engine until the rotating speed value of the engine reaches a rotating speed threshold value, and controlling the starter to stop working.
Optionally, the method further comprises:
when the engine is started, the working current of the hydraulic pump proportional valve is adjusted to adjust the opening of the hydraulic pump proportional valve until the opening of the hydraulic pump proportional valve reaches a preset minimum opening.
Optionally, the step of obtaining a voltage value of a storage battery, controlling the intake air preheater to heat intake air of the engine according to the power-on time of the intake air preheater, the power-on time of the starter, and the voltage value of the storage battery, and controlling the starter to start the engine includes:
acquiring a first voltage value of the storage battery;
under the condition that the power-on time of the air inlet preheater and the first voltage value meet a first rule, controlling the air inlet preheater to heat the inlet air of the engine until the air inlet preheater finishes heating the inlet air of the engine, and obtaining a second voltage value of the storage battery;
and controlling the starter to start the engine under the condition that the power-on time of the starter and the second voltage value meet a second rule.
Optionally, determining the power-on time of the intake air preheater according to the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value comprises:
obtaining a first proportional coefficient corresponding to the atmospheric oxygen content value through a first table or a first fitted curve, obtaining a second proportional coefficient corresponding to the atmospheric temperature value through a second table or a second fitted curve, and obtaining a third proportional coefficient corresponding to the engine coolant temperature value through a third table or a third fitted curve;
weighting and summing the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value based on the first, second and third scaling coefficients to determine the power-on time of the intake preheater;
the first table or the first fitted curve at least comprises first proportionality coefficients representing influence degrees of different atmospheric oxygen contents on the electricity getting time of the intake air preheater, the second table or the second fitted curve at least comprises second proportionality coefficients representing influence degrees of different atmospheric temperature values on the electricity getting time of the intake air preheater, and the third table or the third fitted curve at least comprises third proportionality coefficients representing influence degrees of different engine coolant temperature values on the electricity getting time of the intake air preheater.
Optionally, determining the power-on time of the starter according to the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value includes:
acquiring a fourth proportional coefficient corresponding to the atmospheric oxygen content value through a fourth table or a fourth fitted curve, acquiring a fifth proportional coefficient corresponding to the atmospheric temperature value through a fifth table or a fifth fitted curve, and acquiring a sixth proportional coefficient corresponding to the engine coolant temperature value through a sixth table or a sixth fitted curve;
weighting and summing the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value based on the fourth proportional coefficient, the fifth proportional coefficient and the sixth proportional coefficient to determine the power-on time of the starter;
the fourth table or the fourth fitted curve at least comprises a fourth proportional coefficient for representing the influence degree of different atmospheric oxygen contents on the power-on time of the starter, the fifth table or the fifth fitted curve at least comprises a fifth proportional coefficient for representing the influence degree of different atmospheric temperature values on the power-on time of the starter, and the sixth table or the sixth fitted curve at least comprises a sixth proportional coefficient for representing the influence degree of different engine coolant temperature values on the power-on time of the starter.
Optionally, in a case that the power-on time of the intake air preheater and the first voltage value satisfy a first rule, controlling the intake air preheater to heat the engine intake air includes:
obtaining the calibrated electricity obtaining time of the intake air preheater corresponding to the first voltage value through a seventh table or a seventh fitting curve;
if the electricity obtaining time of the air inlet preheater is longer than the calibrated electricity obtaining time of the air inlet preheater, controlling the air inlet preheater to heat the air inlet of the engine according to the calibrated electricity obtaining time of the air inlet preheater, otherwise, controlling the air inlet preheater to heat the air inlet of the engine according to the calibrated electricity obtaining time of the air inlet preheater;
and the seventh table or the seventh fitting curve at least comprises the calibrated electricity obtaining time of the intake air preheater corresponding to different storage battery voltage values.
Optionally, the intake air preheater completes heating of the engine intake air when the time for which the intake air preheater heats the engine intake air reaches the power-on time of the intake air preheater or the calibrated power-on time of the intake air preheater.
Optionally, in a case that the power-on time of the starter and the second voltage value satisfy a second rule, controlling the starter to start the engine includes:
acquiring the calibrated power-on time of the starter corresponding to the second voltage value through an eighth table or an eighth fitting curve;
if the power-on time of the starter is greater than the calibrated power-on time of the starter, controlling the starter to start the engine according to the calibrated power-on time of the starter, otherwise, controlling the starter to start the engine according to the power-on time of the starter;
and the eighth table or the eighth fitted curve at least comprises the calibrated power-on time of the starter corresponding to different storage battery voltage values.
In a second aspect of the present invention, there is provided a starting apparatus for an engineering machine in a highland severe cold environment, which applies the starting method for an engineering machine in a highland severe cold environment, including:
the data acquisition module is configured to acquire an atmospheric oxygen content value, an atmospheric temperature value, an engine coolant temperature value, a storage battery voltage value and a rotating speed value of the engine in real time;
a control module configured to:
determining the power-on time of an air inlet preheater and the power-on time of a starter according to the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value, controlling the air inlet preheater to heat the air inlet of the engine according to the power-on time of the air inlet preheater, the power-on time of the starter and the voltage value of the storage battery, and controlling the starter to start the engine; and
and under the condition that the rotating speed value of the engine reaches a rotating speed threshold value, controlling the starter to stop working.
In a third aspect of the present invention, a terminal device is provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the method for starting the engineering machinery in the highland and the alpine region.
In a fourth aspect of the present invention, a computer-readable medium is provided, which stores a computer program that, when being processed and executed, implements the above-mentioned starting method for engineering machinery in high and cold altitude.
In a fifth aspect of the present invention, there is provided a starting system for construction machinery in plateau alpine regions, comprising:
the atmospheric oxygen content sensor is used for acquiring an atmospheric oxygen content value;
the atmospheric temperature sensor is used for acquiring an atmospheric temperature value;
the temperature sensor is used for acquiring the temperature value of the engine coolant;
the voltage sensor is used for acquiring the voltage value of the storage battery;
the rotating speed sensor is used for acquiring a rotating speed value of the engine; and
the engineering machinery starting device in plateau high-cold environment.
In a sixth aspect of the present invention, there is provided a construction machine comprising:
the engineering machinery starting system in plateau high-cold areas.
The method comprises the steps of obtaining the atmospheric oxygen content value and the atmospheric temperature value in the working environment of the engineering machinery in real time, obtaining the temperature value of engine cooling liquid in the current environment, and determining the power-on time required by an air preheater before the engine is started and the power-on time required by a starter in the starting process of the engine according to the parameters; controlling the air inlet preheater and the starter to work according to the power-on time of the air inlet preheater, the power-on time of the starter and the real-time voltage value of the storage battery, monitoring the rotating speed value of the engine in real time in the working process of the starter, and determining that the engine is started successfully when the rotating speed value of the engine reaches a rotating speed threshold value. The invention can acquire and calculate the required parameters by only adding a small number of sensors to realize the starting control of the engine in the plateau high-cold environment, has simple installation and maintenance and lower cost compared with the prior art, and is beneficial to the batch popularization of engineering machinery.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a flow chart of a method for starting engineering machinery in a highland and high-cold environment according to a preferred embodiment of the invention;
FIG. 2 is a schematic configuration diagram of an engine starting system of a construction machine according to a preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of the engine start logic provided by the preferred embodiment of the present invention;
fig. 4 is a block diagram schematically illustrating a starting apparatus for construction machinery in a highland and a cold environment according to a preferred embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
As shown in fig. 1, a first aspect of the present embodiment provides a method for starting a construction machine in a highland and cold environment, including:
s100, acquiring an atmospheric oxygen content value, an atmospheric temperature value and an engine coolant temperature value;
s200, determining the power-on time of an air inlet preheater and the power-on time of a starter according to the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value;
s300, acquiring a voltage value of a storage battery, controlling the air inlet preheater to heat air inlet of the engine according to the power-on time of the air inlet preheater, the power-on time of the starter and the voltage value of the storage battery, and controlling the starter to start the engine;
s400, continuously acquiring the rotating speed value of the engine until the rotating speed value of the engine reaches a rotating speed threshold value, and controlling the starter to stop working.
Therefore, the embodiment obtains the atmospheric oxygen content value and the atmospheric temperature value in the working environment of the engineering machinery in real time, and the temperature value of the engine cooling liquid in the current environment, and determines the power-on time required by the air preheater before the engine is started and the power-on time required by the starter in the starting process of the engine according to the parameters; controlling the air inlet preheater and the starter to work according to the power-on time of the air inlet preheater, the power-on time of the starter and the real-time voltage value of the storage battery, monitoring the rotating speed value of the engine in real time in the working process of the starter, and determining that the engine is started successfully when the rotating speed value of the engine reaches a rotating speed threshold value. The starting control method and the starting control device for the engine in the plateau severe cold environment can acquire and calculate the required parameters by only adding a small number of sensors, are simple to install and maintain and lower in cost compared with the prior art, and are beneficial to batch popularization of engineering machinery.
Specifically, under the high and cold environment of the plateau, oxygen deficiency and low temperature are main reasons for difficulty in starting the engineering machinery, and because the environmental temperature and the atmospheric oxygen content are different in different areas of the high and cold environment of the plateau, the influence of the environment of different areas on starting the engineering machinery is also different. In order to solve the problem that the engine of the engineering machinery is difficult to start in different plateau alpine environments, the method provided by the embodiment determines the power-on time of the air inlet preheater and the power-on time of the starter of the engineering machinery in different environments by acquiring the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value of the current environment of the engineering machinery in real time, controls the air preheater to heat the air inlet of the engine and controls the starter to rotate by combining the real-time voltage of the storage battery so as to drive the engine to start, and further can control the starting of the engine in different preheating times and starting times of the starter in different environments. For example, the corresponding power-on time of the intake air preheater and the power-on time of the starter can be determined in advance through experiments when the engine can be successfully started under different atmospheric oxygen content values, different atmospheric temperature values and different engine coolant temperature values, so that a relational table or a fitting curve representing the corresponding relationship between the atmospheric oxygen content values, the atmospheric temperature values and the engine coolant temperature values and the power-on time of the intake air preheater and the power-on time of the starter can be obtained; or, different atmospheric oxygen content values, different atmospheric temperature values and different engine coolant temperature values can be used as input, when the engine can be started successfully, the corresponding power-on time of the air inlet preheater and the corresponding power-on time of the starter are used as output, the power-on time of the air inlet preheater and the power-on time of the starter are predicted by a pre-trained machine learning algorithm under different atmospheric oxygen content values, different atmospheric temperature values and different engine coolant temperature values when the engine can be started successfully, and the air inlet preheater and the starter can be controlled to work in different power-on times according to different actual environments, so that the load of the storage battery can be reduced on the basis of ensuring the air inflow and the air inlet temperature required by the engine to be started successfully, and the service life of the storage battery is prevented from being shortened due to the storage battery.
As shown in fig. 2, the method of the embodiment is applied to an engine starting system of a construction machine, and the control system includes a controller, and an atmospheric oxygen content sensor, an atmospheric temperature sensor, a coolant temperature sensor, a voltage sensor, a rotation speed sensor, a hydraulic pump proportional valve, a starter, an intake air preheater and a display connected to the controller. The method steps of the embodiment can be built in the controller in the form of software modules; the atmospheric oxygen content sensor, the atmospheric temperature sensor, the coolant temperature sensor, the rotating speed sensor and the voltage sensor are respectively used for acquiring an atmospheric oxygen content value, an atmospheric temperature value, an engine coolant temperature value, an engine rotating speed value and a storage battery voltage value of the working environment of the engineering machinery; the controller controls the displacement of the hydraulic pump by controlling the proportional valve of the hydraulic pump, controls the rotation time of the starter by controlling the power-on time of the starter, and controls the heating time of the air inlet preheater for the air inlet temperature by controlling the power-on time of the air inlet preheater, so that the starter drives the engine to rotate by the starter clutch when rotating, and the engine is started; the display is used for displaying relevant control information such as an atmospheric oxygen content value, an atmospheric temperature value, an engine coolant temperature value, a battery voltage value or an engine speed value under the current environment, and the like, and is not limited herein.
The hydraulic pump is used for converting mechanical energy provided by the engine into pressure energy of oil, outputting high-pressure oil to drive an actuator of the engineering machinery to act, and in order to start the engine more quickly and reduce the load of the storage battery, the method of the embodiment further comprises the following steps: when the engine is started, the working current of the hydraulic pump proportional valve is adjusted to adjust the opening of the hydraulic pump proportional valve until the opening of the hydraulic pump proportional valve reaches a preset minimum opening. The output displacement of the hydraulic pump can be controlled by controlling the current of the proportional valve of the hydraulic pump, the smaller the displacement is, the smaller the load when the engine is started is, the upper and lower limit values of the displacement exist when the actuator is driven by the hydraulic pump to normally work, if the displacement of the hydraulic pump is too small, the actuator cannot be driven to act, therefore, when the engine is started, the controller adjusts the opening of the proportional valve of the hydraulic pump to be a preset minimum opening by controlling the working current of the proportional valve of the hydraulic pump, wherein the preset minimum opening is the opening corresponding to the minimum displacement capable of driving the actuator.
In step S200, determining the power-on time of the intake air preheater according to the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value, includes: acquiring a first proportional coefficient corresponding to an atmospheric oxygen content value through a first table or a first fitted curve, acquiring a second proportional coefficient corresponding to an atmospheric temperature value through a second table or a second fitted curve, and acquiring a third proportional coefficient corresponding to an engine coolant temperature value through a third table or a third fitted curve; weighting and summing the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value based on the first proportionality coefficient, the second proportionality coefficient and the third proportionality coefficient to determine the electricity obtaining time of the air inlet preheater; the first table or the first fitted curve at least comprises a first proportionality coefficient representing the influence degree of different atmospheric oxygen contents on the electricity getting time of the intake air preheater, the second table or the second fitted curve at least comprises a second proportionality coefficient representing the influence degree of different atmospheric temperature values on the electricity getting time of the intake air preheater, and the third table or the third fitted curve at least comprises a third proportionality coefficient representing the influence degree of different engine coolant temperature values on the electricity getting time of the intake air preheater.
Specifically, the correspondence between the atmospheric oxygen content value, the atmospheric temperature value, and the engine coolant temperature value and the power acquisition time of the intake air preheater may be determined in advance through experiments, for example, the amount of change in the power acquisition time of the intake air preheater when the atmospheric oxygen content value changes by one or N units, the amount of change in the power acquisition time of the intake air preheater when the atmospheric temperature value changes by one or N units, and the amount of change in the power acquisition time of the intake air preheater when the engine coolant temperature value changes by one or N units in the same environment may be determined, respectively. It is understood that the time the intake air preheater is energized refers to the time required for the engine intake air temperature to reach the set temperature. For example, if the atmospheric oxygen content value at the current time is reduced by 1% compared with the previous time, and the electricity obtaining time of the intake air preheater is increased by 3s compared with the previous time, the first scale coefficient corresponding to the current atmospheric oxygen content value may be a ratio of a variation of the electricity obtaining time of the intake air preheater to a variation of the atmospheric oxygen content value, and the first scale coefficients corresponding to different atmospheric oxygen content values may be fitted to corresponding first fitting curves or a first table may be generated in a one-to-one correspondence relationship. Similarly, if the atmospheric temperature value at the current moment is reduced by 1 ℃ compared with the previous moment, and the electricity obtaining time of the air inlet preheater is increased by 3s compared with the previous moment, the second proportionality coefficient corresponding to the current atmospheric oxygen content value can be the ratio of the electricity obtaining time variation of the air inlet preheater to the atmospheric temperature value variation, and the second proportionality coefficients corresponding to different atmospheric temperature values can be fitted to corresponding second fitting curves or generate a second table in a one-to-one correspondence relationship. If the engine coolant temperature value at the current moment is reduced by 1 ℃ compared with the previous moment, and the power-on time of the intake air preheater is increased by 2s compared with the previous moment, the third proportionality coefficient corresponding to the current engine coolant temperature value can be the ratio of the power-on time variation of the intake air preheater to the engine coolant temperature value variation, and the third proportionality coefficients corresponding to different engine coolant temperature values can be fitted to corresponding third fitting curves or generate a third table in a one-to-one correspondence relationship. Let the atmospheric oxygen content value be X1, the atmospheric temperature value be X2, the engine coolant temperature value be X3, the power-on time of the intake air preheater be Y1, the first proportionality coefficient be Ka1, the second proportionality coefficient be Ka2, the third proportionality coefficient be Ka3, then the power-on time of the intake air preheater be Y1= F1 (X1, X2, X3) = Ka 1+ Ka 2X 2+ Ka 3X 3.
In step S200, determining the power-on time of the starter according to the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value includes: acquiring a fourth proportional coefficient corresponding to the atmospheric oxygen content value through a fourth table or a fourth fitted curve, acquiring a fifth proportional coefficient corresponding to the atmospheric temperature value through a fifth table or a fifth fitted curve, and acquiring a sixth proportional coefficient corresponding to the engine coolant temperature value through a sixth table or a sixth fitted curve; weighting and summing the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value based on the fourth proportional coefficient, the fifth proportional coefficient and the sixth proportional coefficient to determine the power-on time of the starter; the fourth table or the fourth fitted curve at least comprises a fourth proportional coefficient for representing the influence degree of different atmospheric oxygen contents on the power-on time of the starter, the fifth table or the fifth fitted curve at least comprises a fifth proportional coefficient for representing the influence degree of different atmospheric temperature values on the power-on time of the starter, and the sixth table or the sixth fitted curve at least comprises a sixth proportional coefficient for representing the influence degree of different engine coolant temperature values on the power-on time of the starter.
Specifically, the correspondence between the atmospheric oxygen content value, the atmospheric temperature value, and the engine coolant temperature value and the power-on time of the starter are respectively measured in advance through experiments, for example, the amount of change in the power-on time of the starter when the atmospheric oxygen content value changes by one or N units, the amount of change in the power-on time of the starter when the atmospheric temperature value changes by one or N units, and the amount of change in the power-on time of the starter when the engine coolant temperature value changes by one or N units are respectively measured in the same environment. As can be appreciated, the power on time of the starter refers to the time required for the engine speed to reach the speed threshold. For example, if the atmospheric oxygen content value at the current time is reduced by 1% compared with the previous time, and the power-on time of the starter is increased by 2s compared with the previous time, the fourth scaling factor corresponding to the current atmospheric oxygen content value may be a ratio of a variation of the power-on time of the starter to a variation of the atmospheric oxygen content value, and the fourth scaling factors corresponding to different atmospheric oxygen content values may be fitted to a corresponding first fitting curve or a first table may be generated in a one-to-one correspondence relationship. Similarly, if the atmospheric temperature value at the current moment is reduced by 1 ℃ compared with the previous moment, and the power-on time of the starter is increased by 2s compared with the previous moment, the fifth proportional coefficient corresponding to the current atmospheric oxygen content value can be the ratio of the variable quantity of the power-on time of the starter to the variable quantity of the atmospheric temperature value, and the fifth proportional coefficients corresponding to different atmospheric temperature values can be fitted to corresponding second fitting curves or a second table is generated in a one-to-one correspondence relationship. If the engine coolant temperature value at the current moment is reduced by 1 ℃ compared with the previous moment, and the power-on time of the starter is increased by 2s compared with the previous moment, the sixth proportional coefficient corresponding to the current engine coolant temperature value can be the ratio of the variable quantity of the power-on time of the starter to the variable quantity of the engine coolant temperature value, and the sixth proportional coefficients corresponding to different engine coolant temperature values can be fitted to corresponding third fitting curves or a third table is generated in a one-to-one correspondence relationship. Let the power-on time of the starter be Y2, the fourth scaling factor be Kb1, the fifth scaling factor be Kb2, and the sixth scaling factor be Kb3, then the power-on time of the starter is Y2= F2 (X1, X2, X3) = Kb1 × X1+ Kb 2= X2+ Kb3 = X3.
In step S200, acquiring a voltage value of the storage battery, controlling the intake air preheater to heat intake air of the engine according to the power-on time of the intake air preheater, the power-on time of the starter, and the voltage value of the storage battery, and controlling the starter to start the engine, including: acquiring a first voltage value of the storage battery; under the condition that the power-on time of the air inlet preheater and the first voltage value meet a first rule, controlling the air inlet preheater to heat the inlet air of the engine until the air inlet preheater finishes heating the inlet air of the engine, and obtaining a second voltage value of the storage battery; and controlling the starter to start the engine under the condition that the power-on time of the starter and the second voltage value meet a second rule. Specifically, in order to avoid damaging the battery by overdischarge of the storage battery, before the air inlet preheater is controlled to heat the air inlet of the engine, whether a current first voltage value of the storage battery and the power-on time of the air inlet preheater meet a first rule or not is determined, and the air inlet of the engine is controlled to be heated according to a matching result, for example, whether the first voltage value can meet the power-on time of the air inlet preheater obtained by the air inlet preheater to heat the air inlet of the engine or not is determined, if the first voltage value can meet the power-on time of the air inlet preheater obtained by the air inlet preheater, a current second voltage value of the storage battery is obtained in real time, and the starter is controlled according to whether the second voltage value and the power-on time of the starter meet a second rule or not, for example, if the second voltage value can meet the power-on time of the starter to work, the starter is controlled to work according to the power-on time of the starter to drive the engine to start. It can be understood that if the first voltage value cannot meet the requirement that the first voltage value can not meet the requirement that the engine air is heated by the power-on time of the air inlet preheater obtained by the air inlet preheater or the second voltage value cannot meet the requirement that the starter works by the power-on time of the starter, the controller generates alarm information and displays the alarm information through the display screen to prompt staff. And determining that the air inlet preheater completes heating of the air inlet of the engine under the condition that the time for the air inlet preheater to heat the air inlet of the engine reaches the electricity obtaining time of the air inlet preheater or the calibrated electricity obtaining time of the air inlet preheater.
In this embodiment, under the circumstances that the time of getting electricity and the first voltage value of the pre-heater of admitting air satisfy first rule, control the pre-heater of admitting air and heat the engine and admit air, include: obtaining the calibrated electricity obtaining time of the intake air preheater corresponding to the first voltage value through a seventh table or a seventh fitting curve; if the electricity obtaining time of the air inlet preheater is longer than the calibrated electricity obtaining time of the air inlet preheater, controlling the air inlet preheater to heat the air inlet of the engine according to the calibrated electricity obtaining time of the air inlet preheater, otherwise, controlling the air inlet preheater to heat the air inlet of the engine according to the calibrated electricity obtaining time of the air inlet preheater; the seventh table or the seventh fitted curve at least comprises the calibrated power-on time of the intake air preheater corresponding to different battery voltage values. The method comprises the steps of measuring the calibrated power-obtaining time of the storage battery, which can meet the requirement of an air inlet preheater for heating the air inlet of the engine, at different voltage values in advance, and storing the measured data in a memory in a form of a table or a fitting curve for the controller to read. Before controlling the air inlet preheater to work, the controller reads the calibrated electricity obtaining time of the air inlet preheater corresponding to the first voltage value through a prestored seventh table or a seventh fitting curve, compares the calibrated electricity obtaining time with the calculated electricity obtaining time of the air inlet preheater, and controls the air inlet preheater to heat the inlet air of the engine through the electricity obtaining time of the air inlet preheater if the electricity obtaining time of the air inlet preheater is greater than the calibrated electricity obtaining time of the air inlet preheater; and if the electricity obtaining time of the air inlet preheater is not more than the calibrated electricity obtaining time of the air inlet preheater, controlling the air inlet preheater to heat the air inlet of the engine by the calibrated electricity obtaining time of the air inlet preheater, generating alarm information and displaying the alarm information to prompt that the preheating electric quantity is insufficient.
In this embodiment, when the power-on time of the starter and the second voltage value satisfy the second rule, controlling the starter to start the engine includes: obtaining the calibrated power-on time of the starter corresponding to the second voltage value through an eighth table or an eighth fitting curve; if the power-on time of the starter is greater than the calibrated power-on time of the starter, controlling the starter to start the engine according to the calibrated power-on time of the starter, otherwise, controlling the starter to start the engine according to the power-on time of the starter; the eighth table or the eighth fitted curve at least includes the calibrated power-on time of the starter corresponding to different battery voltage values. The method comprises the steps of measuring the calibrated power-on time of a starter which can meet the requirement of the starter when a storage battery works at different voltage values in advance, and storing measured data in a memory in the form of a table or a fitting curve so as to be read by a controller. Before the controller controls the starter to work, the calibrated power-obtaining time of the starter corresponding to the second voltage value is read through a prestored eighth table or an eighth fitting curve and is compared with the calculated power-obtaining time of the starter, and if the power-obtaining time of the starter is greater than the calibrated power-obtaining time of the starter, the controller controls the starter to drive the engine to start by the power-obtaining time of the starter; and if the power-on time of the starter is not more than the calibrated power-on time of the starter, controlling the starter to drive the engine to start by the calibrated power-on time of the starter, generating alarm information and displaying the alarm information to prompt that the starting electric quantity is insufficient. In the starting process of the engine, the rotating speed value of the engine is collected in real time, when the rotating speed value of the engine reaches a rotating speed threshold value, the engine is judged to be successfully started, the starter is controlled to stop rotating, and the starting of the engine is completed. Thus, as shown in fig. 3, in the starting process of the engine, five input variables of an atmospheric oxygen content value, an atmospheric temperature value, an engine coolant temperature value, a storage battery voltage value and an engine speed value, the power-on time of the air intake preheater, the power-on time of the starter and three control variables of a hydraulic pump proportional valve current are synchronously acquired and calculated, the power-on time of the air intake preheater and the power-on time of the starter are limited by taking the storage battery voltage value and the engine speed value as limiting conditions, and a final control parameter is obtained by controlling the execution element through the output of the control parameter of the controller driving port, so that the starting of the engine is controlled by different output parameters aiming at different environments under the condition that the storage battery is not over-discharged according to the actual working environment of the engineering machinery, the starting control precision of the engine is effectively improved, the starting energy consumption under the high and high altitude and cold environments is reduced, and the service life of the storage battery is prolonged.
As shown in fig. 4, in a second aspect of the present invention, there is provided a starting apparatus for a construction machine in a highland and cold environment, the starting method for a construction machine in a highland and cold environment, including: the data acquisition module is configured to acquire an atmospheric oxygen content value, an atmospheric temperature value, an engine coolant temperature value, a storage battery voltage value and a rotating speed value of the engine in real time; the control module is configured to determine the power-on time of the air inlet preheater and the power-on time of the starter according to the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value, control the air inlet preheater to heat the air inlet of the engine according to the power-on time of the air inlet preheater, the power-on time of the starter and the voltage value of the storage battery, and control the starter to start the engine; and controlling the starter to stop working under the condition that the rotating speed value of the engine reaches the rotating speed threshold value.
The specific limitations of each functional module in the engineering machine starting device under high and cold altitude can be referred to the limitations of the above engineering machine starting method under high and cold altitude, and are not described herein again. The various modules in the above-described apparatus may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In a third aspect of the present invention, a terminal device is provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the method for starting the engineering machinery in the highland and the alpine region is implemented.
In a fourth aspect of the present invention, a computer-readable medium is provided, in which a computer program is stored, and the computer program is processed and executed to implement the above-mentioned starting method for engineering machinery in high and cold altitude.
In a fifth aspect of the present invention, there is provided a starting system for construction machinery in plateau alpine regions, comprising: the atmospheric oxygen content sensor is used for acquiring an atmospheric oxygen content value; the atmospheric temperature sensor is used for acquiring an atmospheric temperature value; the temperature sensor is used for acquiring the temperature value of the engine coolant; the voltage sensor is used for acquiring the voltage value of the storage battery; the rotating speed sensor is used for acquiring a rotating speed value of the engine; and the starting device of the engineering machinery in the plateau high and cold.
In a sixth aspect of the present invention, there is provided a construction machine comprising: the engineering machinery starting system in plateau high-cold areas.
The method comprises the steps of obtaining the atmospheric oxygen content value and the atmospheric temperature value in the working environment of the engineering machinery in real time, obtaining the temperature value of engine cooling liquid in the current environment, and determining the power-on time required by an air preheater before the engine is started and the power-on time required by a starter in the starting process of the engine according to the parameters; controlling the air inlet preheater and the starter to work according to the power-on time of the air inlet preheater, the power-on time of the starter and the real-time voltage value of the storage battery, monitoring the rotating speed value of the engine in real time in the working process of the starter, and determining that the engine is started successfully when the rotating speed value of the engine reaches a rotating speed threshold value. The invention can acquire and calculate the required parameters by only adding a small number of sensors to realize the starting control of the engine in the plateau high-cold environment, has simple installation and maintenance and lower cost compared with the prior art, and is beneficial to the batch popularization of engineering machinery.
In conclusion, the system frame of the embodiment has the advantages of simple structure and low cost, the related sensors are all common materials, the purchase cost is low, the installation and maintenance are simple, and the additional installation, the modification and the modification of the machine are easy to realize; the method of the embodiment comprehensively considers various factors influencing the starting of the engine, and realizes the control of the output variables such as an air inlet preheater, a starter, a hydraulic pump proportional valve and the like by acquiring the input variable values including the atmospheric oxygen content value, the atmospheric temperature value, the engine coolant temperature value, the storage battery voltage value and the engine rotating speed value in real time, introducing an independent proportional coefficient based on the consideration of the important degree of the relevant input variables on the starting of the engine and calculating the output state of each output variable through a weighted calculation function; meanwhile, the output variable is limited by the voltage value of the storage battery and the rotating speed value of the engine, so that the safety of the battery and the starter can be effectively protected.
While the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solution of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications are within the scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention will not be described separately for the various possible combinations.
In addition, any combination of the various embodiments of the present invention is also possible, and the same shall be considered as disclosed in the embodiments of the present invention as long as it does not depart from the spirit of the embodiments of the present invention.
Claims (13)
1. A starting method of engineering machinery in plateau high-cold environment is characterized by comprising the following steps:
acquiring an atmospheric oxygen content value, an atmospheric temperature value and an engine coolant temperature value;
determining the power-on time of an air inlet preheater before the engine is started and the power-on time of a starter in the successful starting process of the engine according to the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value;
acquiring a voltage value of a storage battery, controlling the air inlet preheater to heat air inlet of the engine according to the power-on time of the air inlet preheater, the power-on time of the starter and the voltage value of the storage battery, and controlling the starter to start the engine;
and continuously acquiring the rotating speed value of the engine until the rotating speed value of the engine reaches a rotating speed threshold value, and controlling the starter to stop working.
2. The method for starting engineering machinery in high and cold areas on plateau as claimed in claim 1, further comprising:
when the engine is started, the working current of the hydraulic pump proportional valve is adjusted to adjust the opening of the hydraulic pump proportional valve until the opening of the hydraulic pump proportional valve reaches a preset minimum opening.
3. The method for starting engineering machinery in high and cold areas on plateau as claimed in claim 1, wherein obtaining the voltage value of the storage battery, controlling the intake air preheater to heat the intake air of the engine according to the power-on time of the intake air preheater, the power-on time of the starter and the voltage value of the storage battery, and controlling the starter to start the engine comprises:
acquiring a first voltage value of the storage battery;
under the condition that the power-on time of the air inlet preheater and the first voltage value meet a first rule, controlling the air inlet preheater to heat the inlet air of the engine until the air inlet preheater finishes heating the inlet air of the engine, and obtaining a second voltage value of the storage battery;
and controlling the starter to start the engine under the condition that the power-on time of the starter and the second voltage value meet a second rule.
4. The method as claimed in claim 3, wherein the step of determining the power-on time of the intake preheater before the engine is started according to the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value comprises:
obtaining a first proportional coefficient corresponding to the atmospheric oxygen content value through a first table or a first fitted curve, obtaining a second proportional coefficient corresponding to the atmospheric temperature value through a second table or a second fitted curve, and obtaining a third proportional coefficient corresponding to the engine coolant temperature value through a third table or a third fitted curve;
weighting and summing the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value based on the first proportional coefficient, the second proportional coefficient and the third proportional coefficient to determine the power-on time of an air preheater before starting the engine;
the first table or the first fitted curve at least comprises first proportionality coefficients representing influence degrees of different atmospheric oxygen contents on the electricity getting time of the intake air preheater, the second table or the second fitted curve at least comprises second proportionality coefficients representing influence degrees of different atmospheric temperature values on the electricity getting time of the intake air preheater, and the third table or the third fitted curve at least comprises third proportionality coefficients representing influence degrees of different engine coolant temperature values on the electricity getting time of the intake air preheater.
5. The method for starting engineering machinery on plateau and in high cold as claimed in claim 4, wherein the step of determining the power-on time of the starter in the process of successfully starting the engine according to the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value comprises:
acquiring a fourth proportional coefficient corresponding to the atmospheric oxygen content value through a fourth table or a fourth fitted curve, acquiring a fifth proportional coefficient corresponding to the atmospheric temperature value through a fifth table or a fifth fitted curve, and acquiring a sixth proportional coefficient corresponding to the engine coolant temperature value through a sixth table or a sixth fitted curve;
weighting and summing the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value based on the fourth proportional coefficient, the fifth proportional coefficient and the sixth proportional coefficient to determine the power-on time of the starter in the process of successfully starting the engine;
the fourth table or the fourth fitted curve at least comprises fourth proportionality coefficients representing influence degrees of different atmospheric oxygen contents on the power-on time of the starter, the fifth table or the fifth fitted curve at least comprises fifth proportionality coefficients representing influence degrees of different atmospheric temperature values on the power-on time of the starter, and the sixth table or the sixth fitted curve at least comprises sixth proportionality coefficients representing influence degrees of different engine coolant temperature values on the power-on time of the starter.
6. The method for starting engineering machinery in high and cold areas on plateau as claimed in claim 3, wherein in case that the power-on time of the intake air preheater and the first voltage value satisfy a first rule, controlling the intake air preheater to heat the intake air of the engine comprises:
obtaining the calibrated electricity obtaining time of the intake air preheater corresponding to the first voltage value through a seventh table or a seventh fitting curve;
if the electricity obtaining time of the air inlet preheater is longer than the calibrated electricity obtaining time of the air inlet preheater, controlling the air inlet preheater to heat the air inlet of the engine according to the calibrated electricity obtaining time of the air inlet preheater, otherwise, controlling the air inlet preheater to heat the air inlet of the engine according to the calibrated electricity obtaining time of the air inlet preheater;
and the seventh table or the seventh fitting curve at least comprises the calibrated electricity obtaining time of the intake air preheater corresponding to different storage battery voltage values.
7. The method for starting engineering machinery in high and cold areas on plateau as claimed in claim 6, wherein the intake air preheater completes heating of the intake air of the engine when the time for the intake air preheater to heat the intake air of the engine reaches the power-on time of the intake air preheater or the calibrated power-on time of the intake air preheater.
8. The method for starting engineering machinery on high and cold areas on plateau as claimed in claim 6, wherein in case that the power-on time of the starter and the second voltage value satisfy a second rule, controlling the starter to start the engine comprises:
acquiring the calibrated power-on time of the starter corresponding to the second voltage value through an eighth table or an eighth fitting curve;
if the power-on time of the starter is greater than the calibrated power-on time of the starter, controlling the starter to start the engine according to the calibrated power-on time of the starter, otherwise, controlling the starter to start the engine according to the power-on time of the starter;
and the eighth table or the eighth fitted curve at least comprises the calibrated power-on time of the starter corresponding to different storage battery voltage values.
9. An engineering machinery starting device under high and cold altitude, applying the engineering machinery starting method under high and cold altitude of any one of claims 1 to 8, characterized by comprising:
the data acquisition module is configured to acquire an atmospheric oxygen content value, an atmospheric temperature value, an engine coolant temperature value, a storage battery voltage value and a rotating speed value of the engine in real time;
a control module configured to:
determining the power-on time of an air inlet preheater before the engine is started and the power-on time of a starter in the successful starting process of the engine according to the atmospheric oxygen content value, the atmospheric temperature value and the engine coolant temperature value, controlling the air inlet preheater to heat the air inlet of the engine according to the power-on time of the air inlet preheater, the power-on time of the starter and the voltage value of the storage battery, and controlling the starter to start the engine; and
and controlling the starter to stop working under the condition that the rotating speed value of the engine reaches a rotating speed threshold value.
10. A terminal device comprising a memory, a processor and a computer program stored in the memory and operable on the processor, wherein the processor executes the computer program to implement the method for starting the engineering machinery in the highland and the alpine region as claimed in any one of claims 1 to 8.
11. A computer-readable medium, in which a computer program is stored, wherein the computer program is configured to implement the method for starting a construction machine in a cold plateau as claimed in any one of claims 1 to 8.
12. An engineering machinery starting system under plateau high and cold is characterized by comprising:
the atmospheric oxygen content sensor is used for acquiring an atmospheric oxygen content value;
the atmospheric temperature sensor is used for acquiring an atmospheric temperature value;
the cooling liquid temperature sensor is used for acquiring the temperature value of the cooling liquid of the engine;
the voltage sensor is used for acquiring the voltage value of the storage battery;
the rotating speed sensor is used for acquiring a rotating speed value of the engine; and
the starting device for engineering machinery in high and cold altitude as claimed in claim 9.
13. A work machine, comprising: the starting system for engineering machinery in cold highland as claimed in claim 12.
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