CN111550346A - Cold start comprehensive preheating system for tension machine - Google Patents

Cold start comprehensive preheating system for tension machine Download PDF

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Publication number
CN111550346A
CN111550346A CN202010347897.0A CN202010347897A CN111550346A CN 111550346 A CN111550346 A CN 111550346A CN 202010347897 A CN202010347897 A CN 202010347897A CN 111550346 A CN111550346 A CN 111550346A
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preheating
module
oil
plc
fuel
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刘建锋
高晓莉
吕永跃
朱吉祥
李林峰
马守锋
高永战
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Henan Electric Power Boda Technology Co ltd
Henan Power Transmission and Transformation Construction Co Ltd
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Henan Electric Power Boda Technology Co ltd
Henan Power Transmission and Transformation Construction Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02NSTARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00Starting aids for combustion engines, not otherwise provided for
    • F02N19/02Aiding engine start by thermal means, e.g. using lighted wicks
    • F02N19/04Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/02Conditioning lubricant for aiding engine starting, e.g. heating
    • F01M5/021Conditioning lubricant for aiding engine starting, e.g. heating by heating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02NSTARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00Starting aids for combustion engines, not otherwise provided for
    • F02N19/02Aiding engine start by thermal means, e.g. using lighted wicks
    • F02N19/04Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
    • F02N19/10Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of engine coolants
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04Special measures taken in connection with the properties of the fluid
    • F15B21/042Controlling the temperature of the fluid
    • F15B21/0427Heating

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

The invention discloses a cold start comprehensive preheating system for a tension machine, which comprises an air inlet preheating module, a fuel oil/lubricating oil preheating module, a PLC (programmable logic controller), a first preheating pipeline loop, a second preheating pipeline loop, a fuel oil heater, a temperature monitoring module, a first electric switch and a second electric switch, wherein the fuel oil heater is arranged in a combustion chamber, the first electric switch and the second electric switch are connected with the PLC, and the output end of the PLC is connected with the input ends of the air inlet preheating module and the fuel oil/lubricating oil preheating module. The invention can respectively preheat the air inlet, the fuel oil/lubricating oil, the cooling liquid and the pressure oil of the engine simultaneously, and the PLC is provided with timing protection and overheating prevention protection to realize the completion of preheating, thereby improving the lubricating condition of mechanical parts, reducing the running resistance moment, solving the problem of difficult starting of the prior equipment preheating system, reducing the equipment abrasion, improving the working performance and prolonging the service life.

Description

Cold start comprehensive preheating system for tension machine
Technical Field
The invention relates to the technical field of stretching machine equipment, in particular to a cold start comprehensive preheating system for a stretching machine.
Background
The tension machine is special equipment for tension stringing construction of electric power transmission and transformation, a power source of a fuel engine is loaded on the hydraulic transmission tension machine, a closed variable hydraulic system carries out power transmission and stepless speed change, and a double-roller mechanism is driven to realize tension spreading or traction of a power line ground wire.
At present, when the traction machine is generally used under the low-temperature condition, the traction machine is provided with an engine air inlet preheating module or is simultaneously provided with a fuel heater in a combustion chamber to preheat engine cooling liquid so as to assist the low-temperature starting of the engine. Under an extremely severe cold environment, lubricating oil has high viscosity, the running resistance of mechanical parts is increased, the air inlet preheating capacity is small, the fuel oil temperature is too low, the atomization property is poor, the spontaneous combustion temperature can not be reached after compression, the ignition is difficult, and the engine faces the serious starting difficulty problem; meanwhile, the severe cold environment can cause the oil viscosity of the hydraulic system to be increased, the flowability to be poor, the lubricating property to be reduced, the oil absorption of the closed hydraulic system to be difficult, and the dry friction of the hydraulic element accelerates the damage, so that the leakage in the system is increased, the performance is poor, and the service life of the equipment is further shortened.
Disclosure of Invention
The invention aims to provide a cold-start comprehensive preheating system for a tension machine, which can solve the problems of difficult engine start, difficult oil absorption of a hydraulic system and accelerated component abrasion of a hydraulic transmission tension machine under a severe cold condition, improve the adaptability of equipment in a severe cold environment and the reliability of the hydraulic system, and further improve the performance and the service life of the equipment.
The technical scheme adopted by the invention is as follows: a cold start comprehensive preheating system for a traction machine comprises an air inlet preheating module, a fuel oil/lubricating oil preheating module, a PLC (programmable logic controller), a first preheating pipeline loop, a second preheating pipeline loop, a fuel oil heater, a double-loop heat exchanger, a temperature monitoring module, a first electric switch and a second electric switch, wherein the fuel oil heater is arranged in a combustion chamber, the first electric switch and the second electric switch are connected with the PLC, and the output end of the PLC is connected with the input ends of the air inlet preheating module and the fuel oil/lubricating oil preheating module;
the output end of the PLC is also connected with an oil pump, the combustion chamber and the double-loop heat exchanger are sequentially communicated, the first preheating pipeline loop comprises a pipeline loop formed by sequentially connecting a cooling liquid pump, a cooling liquid preheating pipeline and a cooling liquid tank, the second preheating pipeline loop comprises a pipeline loop formed by sequentially connecting a pressure oil pump, a pressure oil preheating pipeline and a pressure oil tank, the cooling liquid pump and the pressure oil pump are both connected with the output end of the PLC, the cooling liquid preheating pipeline and the pressure oil preheating pipeline are both communicated with the double-loop heat exchanger, and the first preheating pipeline loop and the second preheating pipeline loop are both communicated with the combustion chamber through the double-loop heat exchanger;
the temperature monitoring module comprises a first temperature sensor, a second temperature sensor and a third temperature sensor, the first temperature sensor, the second temperature sensor and the third temperature sensor are respectively used for monitoring the temperature of the combustion chamber, the temperature of the cooling liquid preheating pipeline and the temperature of the pressure oil preheating pipeline, and the output ends of the first temperature sensor, the second temperature sensor and the third temperature sensor are connected with the input end of the PLC;
the first electric switch controls the start and stop of the air inlet preheating module through the PLC, the second electric switch controls the start and stop of the fuel oil/lubricating oil preheating module, the oil pump, the cooling liquid pump and the pressure oil pump through the PLC, and the PLC can control the first electric switch and the second electric switch to be closed through the contact disconnection of the control relay.
Preferably, the cold start comprehensive preheating system further comprises a digital display module, the input end of the digital display module is connected with the output end of the PLC, the output end of the digital display module is connected with a liquid crystal panel, and the liquid crystal panel is used for displaying the monitoring results of the first temperature sensor, the second temperature sensor and the third temperature sensor in real time.
Preferably, the cold-start comprehensive preheating system further comprises a fuel tank fuel preheating module, the fuel tank fuel preheating module is a resistance heating rod, and the resistance heating rod is placed at an engine oil suction port inside the fuel tank.
Preferably, the cold start comprehensive preheating system further comprises an indicator light, the input end of the indicator light is connected with the output end of the PLC, and the indicator light is used for displaying the working states of the air inlet preheating module, the fuel oil/lubricating oil preheating module, the fuel oil preheating module of the fuel tank and the fuel oil heater.
Preferably, the air inlet preheating module is a grid type electric heating body and is arranged in the engine water cooler.
Preferably, the fuel oil/lubricating oil preheating module is a flexible electric heating body and is wound and coated on the outer surfaces of the oil conveying pipeline, the fuel oil filter, the oil-water separator and the lubricating oil filter.
Preferably, the double-loop heat exchanger is an electrically driven double-pump double-loop integrated sealing heat exchanger.
Preferably, the model of the PLC controller is SF 9508.
Preferably, the first temperature sensor, the second temperature sensor and the third temperature sensor are all of model number WG 426.
Preferably, the model of the fuel oil heater is YJ-Q12/2-BG.
The invention has the beneficial effects that: the cold start comprehensive preheating system for the stretching machine, provided by the invention, can be used for respectively preheating the air inlet of the engine, the fuel oil/lubricating oil, the cooling liquid and the pressure oil simultaneously by arranging the air inlet preheating module, the fuel oil/lubricating oil preheating module, the PLC controller, the first preheating pipeline loop and the second preheating pipeline loop according to the influence factors of the cold start of the equipment under the severe cold condition aiming at the defects of the preheating mode of the current equipment, and is provided with the timing protection and the overheating prevention protection by the PLC controller to realize the completion of the preheating, thereby improving the lubricating conditions of mechanical parts, reducing the running resistance moment, improving the temperature of an engine cylinder and the temperature of a hydraulic system, solving the problem of difficult equipment start caused by over-low power or single function of the preheating system of the current equipment, and improving the adaptability of the severe cold condition of the equipment and the reliability of the hydraulic system, further reducing the abrasion of the equipment, improving the performance of the equipment and prolonging the service life.
Drawings
Fig. 1 is a schematic block diagram of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the invention comprises an air intake preheating module, a fuel oil/lubricating oil preheating module, a PLC controller, a first preheating pipeline loop, a second preheating pipeline loop, a fuel oil heater, a double-loop heat exchanger, a temperature monitoring module, a first electrical switch and a second electrical switch, wherein the fuel oil heater is arranged in a combustion chamber, the fuel oil heater is of the type YJ-Q12/2-BG, the first electrical switch and the second electrical switch are both connected with the PLC controller, the PLC controller is of the type SF9508, the output end of the PLC controller is connected with the input ends of the air intake preheating module and the fuel oil/lubricating oil preheating module, the air intake preheating module is a grid type electric heating body and is arranged in an engine water cooler and used for electrically heating air entering an engine system, the fuel oil/lubricating oil preheating module is a flexible electric heating body, the winding cladding is at defeated oil pipe way, fuel filter, oil water separator and lubricating oil filter surface, heats it through the heat-conduction mode, opens first electrical switch, under PLC controller's effect, the module start is preheated in the admission, in actual operation, when the temperature is lower, opens the second electrical switch according to the condition, fuel/lubricating oil preheats module, fuel tank fuel and preheats module, coolant pump, oil pump and pressure oil pump start, carries out the preheating to air in the engine, fuel/lubricating oil, coolant liquid and pressure oil.
The output of PLC controller still is connected with the oil pump, combustion chamber and two return circuit heat exchangers are linked together in proper order, first preheating pipe way includes the pipeline return circuit that coolant pump, coolant liquid preheating pipe way and coolant liquid case connect gradually and constitute, the second preheating pipe way return circuit includes the pipeline return circuit that pressure oil pump, pressure oil preheating pipe way and pressurized oil tank connect gradually and constitute, coolant pump and pressure oil pump all are connected with the output of PLC controller, coolant liquid preheating pipe way and pressure oil preheating pipe way all are linked together with two return circuit heat exchangers, first preheating pipe way return circuit and second preheating pipe way return circuit all communicate through two return circuit heat exchangers and combustion chamber, two return circuit heat exchangers be the sealed heat exchanger of two return circuit integral types of electric drive two pumps, open second electrical switch, under the effect of PLC controller, coolant pump, After the pressure oil pump and the oil pump are started, cooling liquid in the cooling liquid tank flows to a cooling liquid preheating pipeline through a cooling liquid pump, pressure oil in the pressure oil tank flows to the pressure oil preheating pipeline through the pressure oil pump, fuel oil flowing to a combustion chamber through the oil pump is heated under the action of a fuel oil heater, the heated fuel oil flows to the cooling liquid preheating pipeline and the pressure oil preheating pipeline through a double-loop heat exchanger, and then flows into the cooling liquid tank and the pressure oil tank respectively to be mixed and circulated, so that the preheating of the cooling liquid and the preheating of the pressure oil are realized.
The first electrical switch controls the air inlet preheating module to be started or stopped through the PLC, the second electrical switch controls the fuel oil/lubricating oil preheating module, the fuel oil lubricating module of the fuel tank, the oil pump, the cooling liquid pump and the pressure oil pump to be started or stopped through the PLC, and the PLC can control the first electrical switch and the second electrical switch to be closed through the contact disconnection of the control relay.
The cold start comprehensive preheating system further comprises an indicator lamp, the input end of the indicator lamp is connected with the output end of the PLC, the indicator lamp is used for displaying the working states of the air inlet preheating module, the fuel oil/lubricating oil preheating module, the fuel oil preheating module of the fuel oil tank and the fuel oil heater, and the indicator lamp is provided with a plurality of modules which correspond to the modules one to one.
The intake air preheating module and the fuel oil/lubricating oil preheating module are subjected to timing control and overheat protection through a PLC (programmable logic controller), and the specific principle is as follows: the air inlet preheating module and the fuel oil/lubricating oil preheating module are pure resistance circuits.
The calculation formula of the preheating power of the air inlet preheating module is as follows:
Figure BDA0002469749850000051
wherein, P1For the preheating power of the intake preheating module, U is the power supply circuit voltage, R1Is the resistance of the grid type electric heater.
The calculation formula of the timing time controlled by the air inlet preheating module is as follows:
Figure BDA0002469749850000052
wherein, TIntoControlling the timing of the intake air preheating module, V1η for engine intake system volume1Is the density of air, t1For preheating the inlet air preheating module to a set temperature, t0Is ambient temperature, C1Is the specific heat capacity of air, P1Is the preheating power of the intake preheating module.
The formula for calculating the preheating power of the fuel oil/lubricating oil preheating module is as follows:
Figure BDA0002469749850000053
wherein, P2For the preheating power of the fuel oil/lubricating oil preheating module, U is the voltage of the power circuit, R2Is the resistance of the flexible electric heater.
The formula for calculating the control timing time of the fuel oil/lubricating oil preheating module is as follows:
Figure BDA0002469749850000054
wherein, TBurning deviceControlling timing time, V, for fuel/lubricant preheating module2η for engine fuel/oil volume2As fuel/lubricant density, t2For preheating the set temperature, t, of the fuel/lubricating oil preheating module0Is ambient temperature, C2Specific heat capacity of fuel/lubricating oil, P2The preheating power of the fuel oil/lubricating oil preheating module.
Firstly, a preheating temperature set value t is preset1And t2Before preheating begins, the PLC controller receives the temperature of the first temperature sensor and takes the temperature as the ambient temperature t0PLC controller automatic calculation air inlet preheating module TIntoAnd control timing time T of fuel/lubricant preheating moduleBurning deviceAnd then when the first electric switch or the second electric switch is turned on, the PLC controller receives a signal, the indicator lamp of the corresponding module is switched on, the timer starts to time, after the corresponding control timing time is reached, the PLC controller automatically switches off the input of the electric heating body of the corresponding preheating module and controls the indicator lamp of the corresponding module to be switched off, and the heating of the corresponding module is finished.
The cold start comprehensive preheating system further comprises a fuel tank fuel preheating module, the input end of the fuel tank fuel preheating module is connected with the output end of the PLC, and is controlled to be opened by the second electrical switch, the fuel tank fuel preheating module is a resistance heating rod, when the second electrical switch is opened, the PLC sends a signal to control the resistance heating rod to start heating, the resistance heating rod is placed at an engine oil suction port inside the fuel tank and is used for directly heating the fuel, after the fuel/lubricating oil preheating module is heated, the PLC simultaneously disconnects the input of an electric heating body of the fuel tank fuel preheating module, controls the disconnection of an indicator lamp corresponding to the resistance heating rod, and the fuel tank fuel preheating module is heated.
The temperature monitoring module comprises a first temperature sensor, a second temperature sensor and a third temperature sensor, the types of the first temperature sensor, the second temperature sensor and the third temperature sensor are WG426, the first temperature sensor, the second temperature sensor and the third temperature sensor are respectively used for monitoring the temperatures of a combustion chamber, a cooling liquid preheating pipeline and a pressure oil preheating pipeline, the output ends of the first temperature sensor, the second temperature sensor and the third temperature sensor are connected with the input end of a PLC (programmable logic controller), the PLC is preset with a temperature set value, when the temperatures detected by the first temperature sensor, the second temperature sensor and the third temperature sensor reach the set value, the PLC controls the corresponding fuel heater, a cooling liquid pump or a pressure oil pump to be disconnected, controls the corresponding indicating lamp to be disconnected and stops the circulation and heating of the fuel heater, the cooling liquid pump or the pressure oil pump, and after preheating is finished, the PLC controls the relay of the second electrical switch to be switched off.
The cold start comprehensive preheating system further comprises a digital display module, the input end of the digital display module is connected with the output end of the PLC, the output end of the digital display module is connected with a liquid crystal panel, and the liquid crystal panel is used for displaying monitoring results of the first temperature sensor, the second temperature sensor and the third temperature sensor in real time, so that workers can observe the monitoring results conveniently.
It is noted that the terms first, second and third in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances with embodiments of the application described herein.
The foregoing has described the general principles, principal features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.

Claims (10)

1. The utility model provides a preheat system is synthesized to cold start for leading and stretching machine which characterized in that: the fuel oil preheating device comprises an air inlet preheating module, a fuel oil/lubricating oil preheating module, a PLC (programmable logic controller), a first preheating pipeline loop, a second preheating pipeline loop, a fuel oil heater, a double-loop heat exchanger, a temperature monitoring module, a first electrical switch and a second electrical switch, wherein the fuel oil heater is arranged in a combustion chamber, the first electrical switch and the second electrical switch are connected with the PLC, and the output end of the PLC is connected with the input ends of the air inlet preheating module and the fuel oil/lubricating oil preheating module;
the output end of the PLC is also connected with an oil pump, the combustion chamber and the double-loop heat exchanger are sequentially communicated, the first preheating pipeline loop comprises a pipeline loop formed by sequentially connecting a cooling liquid pump, a cooling liquid preheating pipeline and a cooling liquid tank, the second preheating pipeline loop comprises a pipeline loop formed by sequentially connecting a pressure oil pump, a pressure oil preheating pipeline and a pressure oil tank, the cooling liquid pump and the pressure oil pump are both connected with the output end of the PLC, the cooling liquid preheating pipeline and the pressure oil preheating pipeline are both communicated with the double-loop heat exchanger, and the first preheating pipeline loop and the second preheating pipeline loop are both communicated with the combustion chamber through the double-loop heat exchanger;
the temperature monitoring module comprises a first temperature sensor, a second temperature sensor and a third temperature sensor, the first temperature sensor, the second temperature sensor and the third temperature sensor are respectively used for monitoring the temperature of the combustion chamber, the temperature of the cooling liquid preheating pipeline and the temperature of the pressure oil preheating pipeline, and the output ends of the first temperature sensor, the second temperature sensor and the third temperature sensor are connected with the input end of the PLC;
the first electric switch controls the start and stop of the air inlet preheating module through the PLC, the second electric switch controls the start and stop of the fuel oil/lubricating oil preheating module, the oil pump, the cooling liquid pump and the pressure oil pump through the PLC, and the PLC can control the first electric switch and the second electric switch to be closed through the contact disconnection of the control relay.
2. The cold start integrated preheating system for a distractor according to claim 1, wherein: the monitoring device is characterized by further comprising a digital display module, wherein the input end of the digital display module is connected with the output end of the PLC, the output end of the digital display module is connected with a liquid crystal panel, and the liquid crystal panel is used for displaying monitoring results of the first temperature sensor, the second temperature sensor and the third temperature sensor in real time.
3. The cold start integrated preheating system for a distractor according to claim 1, wherein: the fuel preheating module of the fuel tank is controlled to be started by a second electrical switch and is a resistance heating rod, and the resistance heating rod is placed at an engine oil suction port inside the fuel tank.
4. The cold start integrated preheating system for a distractor according to claim 3, wherein: the fuel preheating device is characterized by further comprising an indicator lamp, the input end of the indicator lamp is connected with the output end of the PLC, and the indicator lamp is used for displaying the working states of the air inlet preheating module, the fuel/lubricating oil preheating module, the fuel tank fuel preheating module and the fuel heater.
5. The cold start integrated preheating system for a distractor according to claim 1, wherein: the air inlet preheating module is a grid type electric heating body and is arranged in the engine water cooler.
6. The cold start integrated preheating system for a distractor according to claim 1, wherein: the fuel oil/lubricating oil preheating module is a flexible electric heating body and is wound and coated on the outer surfaces of the oil conveying pipeline, the fuel oil filter, the oil-water separator and the lubricating oil filter.
7. The cold start integrated preheating system for a distractor according to claim 1, wherein: the double-loop heat exchanger is an electrically-driven double-pump double-loop integrated sealing heat exchanger.
8. The cold start integrated preheating system for a distractor according to claim 1, wherein: the model of the PLC controller is SF 9508.
9. The cold start integrated preheating system for a distractor according to claim 1, wherein: the first temperature sensor, the second temperature sensor and the third temperature sensor are all in WG426 model.
10. The cold start integrated preheating system for a distractor according to claim 1, wherein: the model of the fuel oil heater is YJ-Q12/2-BG.
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Publication number Priority date Publication date Assignee Title
CN115306572A (en) * 2022-08-26 2022-11-08 潍柴动力股份有限公司 Engine starting method, device, equipment and medium
CN115306572B (en) * 2022-08-26 2024-01-16 潍柴动力股份有限公司 Engine starting method, device, equipment and medium

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Application publication date: 20200818