Blowing engine unit control system and method and snow sweeper

Abstract

The invention relates to a blowing engine unit control system and method and a snow sweeper. A control system for an engine block including a first engine and a second engine, the control system including: a PLC controller configured to store and execute a control program; the CAN communication module is in communication connection with the PLC and is used for establishing a data communication link with the first engine and the second engine; the sensor set is in communication connection with the PLC and used for collecting operation parameters of the first engine and the second engine in real time, and the operation parameters comprise the rotating speed, the power takeoff rotating speed, the turbine temperature, the fuel oil pressure and the lubricating oil pressure. According to the method, before the second engine is started, state detection is forcibly carried out, and the problems that due to the fact that the two engines are started at the same time, power grid load impact is too large, and air source competition is caused are solved. It is ensured that the first engine and the second engine can be started in order, and the stability and reliability of the whole power system are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engines, in particular to a blowing engine group control system, a control method and a snow removal vehicle. BACKGROUND

[0002] The turbojet snow removal vehicle uses the high-speed gas flow discharged by the aviation turbofan engine to remove snow, and can remove the accumulated snow and ice on the road at one time. The snow removal vehicle modified from the retired aviation engine has the advantages of fast snow removal speed, high efficiency, good ice removal effect and low cost, and has gradually become an important military-civilian integration equipment for emergency protection of winter ice and snow disasters of airports and highways.

[0003] The operation process of the turbojet engine is complex, and misoperation can easily lead to start failure or equipment damage, and there are many instruments to be monitored during work, and monitoring omissions are easy to occur to cause abnormalities. The existing control mode lacks an automatic coordination mechanism, the dual-engine start is easy to conflict, the emergency shutdown response is lagging, and the stability of the hydraulic system is insufficient in a low-temperature environment.

[0004] Therefore, it is urgent to develop a start control program integrating automatic control, multiple protection and dual-engine coordination function to improve the safety and efficiency of engine operation. SUMMARY

[0005] Therefore, the present application aims to provide a blowing engine group control system, a control method and a snow removal vehicle to solve the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows: The present application provides a blowing engine group control system, the engine group comprising a first engine and a second engine, and the control system comprising: a PLC controller configured to store and execute a control program; a CAN communication module in communication connection with the PLC controller, used to establish a data communication link with the first engine and the second engine; a sensor group in communication connection with the PLC controller, used to collect the running parameters of the first engine and the second engine in real time, the running parameters comprising the rotating speed, the power take-off speed, the turbine temperature, the fuel pressure and the oil pressure; a human-computer interaction interface in communication connection with the PLC controller, comprising operation buttons for issuing start, shutdown and emergency stop instructions and display instruments for displaying system status and parameters; The PLC controller acquires data through the CAN communication module, monitors the state through the sensor group, and executes operations through the actuator group.

[0007] The present invention also proposes an engine set control method, which is executed by the above-mentioned system and includes the following steps: S1: Power on the first and second engines, establish communication through the CAN communication module, detect and confirm that the initial speed of both engines is 0, and monitor the fuel pressure. S2, determine if the fuel pressure is greater than 30 kPa; if yes, allow the start-up process; if no, wait and issue an alarm. S3, upon receiving the first engine start command and meeting the start permission conditions, controls the opening of its starter motor solenoid valve, monitors its speed in real time, and performs segmented control based on the speed value: S4. Upon receiving the second engine start command, first determine whether the second engine speed is 0 and whether the first engine is not in the start-up process; if the coordination condition is met, execute the same control flow as the first engine coordination start-up step.

[0008] Furthermore, the segmented control in S3 includes: When the speed is greater than 300 r / min and the speed of the associated power take-off reaches 300 r / min, control to start its fuel pump; When the speed is greater than 6500 r / min, the throttle push rod is controlled to reduce the oil at intervals to stabilize the speed within the preset range. When the speed exceeds 9000 r / min, a prompt will be made to perform the oiling push rod operation a predetermined number of times until the speed reaches and stabilizes at the rated operating speed.

[0009] Furthermore, the predetermined number of times is 3 times to prompt the push of the oil filling lever, and the rated operating speed is 9500 r / min.

[0010] Furthermore, the method also includes real-time monitoring of engine temperature and lubricating oil pressure during engine operation; If the temperature exceeds the first temperature threshold, deceleration control is executed; If the temperature exceeds the higher second temperature threshold, or the lubricating oil pressure exceeds the safe pressure range, an emergency shutdown control will be immediately executed.

[0011] Furthermore, the real-time monitoring also includes a step of monitoring the linkage between engine speed and throttle: When the engine speed exceeds 1300 r / min and remains there for the first preset duration, the stop lever is moved to the 80% position to allow manual acceleration. When the engine speed exceeds 1800 r / min and continues for the second preset duration, the stop lever is controlled to the 55% position, allowing further adjustment of the throttle. When the speed exceeds 5000 r / min, it enters the normal throttle control mode and forces the engine to warm up.

[0012] Furthermore, the first temperature threshold is 690°C, the second temperature threshold is 730°C, and the safe pressure range is less than 0.2 kg or greater than 3.5 kg.

[0013] Furthermore, the first preset duration is 50 seconds, and the second preset duration is 10 seconds.

[0014] Furthermore, the method also includes: Upon receiving a normal shutdown command, the engine is controlled to gradually reduce speed according to a preset procedure, first running in cold mode, then reducing to idle speed, and finally shutting off the fuel supply and ignition system in sequence. Upon receiving an emergency shutdown order, the fuel supply is immediately cut off and maximum fuel reduction is implemented to achieve a rapid shutdown.

[0015] The present invention also proposes a snowplow, including a vehicle body on which a blower engine control system as described above is installed.

[0016] Compared with the prior art, the present invention has the following advantages: In this invention, a mandatory state check is performed before starting the second engine, preventing problems such as excessive grid load impact and gas source contention caused by simultaneous starting of both engines. This ensures that the first and second engines can start in an orderly manner, guaranteeing the stability and reliability of the entire power system. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the overall control method of the present invention. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0019] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "back," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] Furthermore, in the description of this invention, unless otherwise explicitly defined, the terms "installation," "connection," "linking," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] Example 1 Overall, this embodiment proposes a blower engine control system, wherein the engine unit includes a first engine and a second engine, characterized in that: the control system includes: This includes a PLC controller, which is configured to store and execute control programs; The CAN communication module, which communicates with the PLC controller, is used to establish a data communication link with the first and second engines. The sensor group, which communicates with the PLC controller, is used to collect the operating parameters of the first and second engines in real time. The operating parameters include speed, power take-off speed, turbine temperature, fuel pressure and lubricating oil pressure. The human-machine interface communicates with the PLC controller and includes operation buttons for issuing start, stop, and emergency stop commands, as well as display instruments for displaying system status and parameters. The PLC controller acquires data through the CAN communication module, monitors the status through the sensor group, and performs operations through the actuator group.

[0023] In this embodiment, the optimal startup, operation, and shutdown process is fixed through the PLC program. Operators only need to execute simple instructions and do not need to have extremely high professional knowledge and operating experience, which fundamentally avoids the risk of startup failure or equipment damage caused by misoperation.

[0024] The control system has built-in collaborative logic to strictly judge the dual-engine status, ensuring that the second engine can only start when the first engine has finished starting or is in a stationary state. This effectively avoids grid impact, gas source competition and power conflict caused by simultaneous starting of the two engines, and ensures the overall stability of the unit operation.

[0025] Example 2 This embodiment proposes an engine set control method, which is executed by the system proposed in Embodiment 1, and includes the following steps: S1: Power on the first and second engines, establish communication through the CAN communication module, detect and confirm that the initial speed of both engines is 0, and monitor the fuel pressure. S2, determine if the fuel pressure is greater than 30 kPa; if yes, allow the start-up process; if no, wait and issue an alarm. S3, upon receiving the first engine start command and meeting the start permission conditions, controls the opening of its starter motor solenoid valve, monitors its speed in real time, and performs segmented control based on the speed value: S4. Upon receiving the second engine start command, first determine whether the second engine speed is 0 and whether the first engine is not in the start-up process; if the coordination condition is met, execute the same control flow as the first engine coordination start-up step.

[0026] In this embodiment, a mandatory state check is performed before starting the second engine to prevent problems such as excessive grid load impact and gas source contention caused by simultaneous starting of both engines. This ensures that the first and second engines can start in an orderly manner, guaranteeing the stability and reliability of the entire power system.

[0027] It should be noted that using fuel pressure greater than 30 kPa as a criterion for the starting process forms the first safety barrier. This not only ensures sufficient fuel supply during the starting process but also prevents damage to components that might result from forcibly starting the engine when the pressure is insufficient.

[0028] In addition, this control method uses a PLC program as its carrier, and its control logic (such as pressure threshold, speed node, and delay parameters) can be adjusted by software. It can adapt to different engine models or updated operating specifications without changing the hardware structure.

[0029] Based on the above settings, the segmented control in S3 includes: When the speed is greater than 300 r / min and the speed of the associated power take-off reaches 300 r / min, control to start its fuel pump; When the speed is greater than 6500 r / min, the throttle push rod is controlled to reduce the oil at intervals to stabilize the speed within the preset range. When the speed exceeds 9000 r / min, a prompt will be made to perform the oiling push rod operation a predetermined number of times until the speed reaches and stabilizes at the rated operating speed.

[0030] Preferably, the predetermined number of times is 3 times to prompt the oiling pusher, and the rated working speed is 9500 r / min.

[0031] In this embodiment, by setting control actions at key nodes, multiple safety buffers are formed, which effectively prevents abnormal operating conditions such as over-speed and overheating, and ensures the safety and reliability of the startup process.

[0032] It should be further noted that the method of this implementation also includes real-time monitoring of engine temperature and lubricating oil pressure during engine operation; If the temperature exceeds the first temperature threshold, deceleration control is executed; If the temperature exceeds a higher second temperature threshold, or the lubricating oil pressure exceeds the safe pressure range, an emergency shutdown control will be immediately executed. The first temperature threshold is 690°C, and the second temperature threshold is 730°C; the safe pressure range is less than 0.2 kg or greater than 3.5 kg.

[0033] The real-time monitoring also includes monitoring the linkage between engine speed and throttle: When the engine speed exceeds 1300 r / min and remains there for the first preset duration, the stop lever is moved to the 80% position to allow manual acceleration. When the engine speed exceeds 1800 r / min and continues for the second preset duration, the stop lever is controlled to the 55% position, allowing further adjustment of the throttle. When the engine speed exceeds 5000 rpm, it enters normal throttle control mode and forces a warm-up operation. The first preset duration is 50 seconds, and the second preset duration is 10 seconds.

[0034] In this embodiment, a two-stage response of deceleration and shutdown distinguishes between minor anomalies and serious faults, ensuring both safety and optimizing equipment utilization efficiency.

[0035] Forced warm-up rules and preventative overheat protection reduce the engine's operating time under adverse conditions, fundamentally helping to extend its overhaul cycle and service life.

[0036] Example 3 This embodiment proposes a snowplow that is equipped with the blower engine control system of Embodiment 1 described above.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A blower engine control system, the engine assembly comprising a first engine and a second engine, characterized in that, The control system includes: This includes a PLC controller, which is configured to store and execute control programs; The CAN communication module is connected to the PLC controller and is used to establish a data communication link with the first engine and the second engine. The sensor group is communicatively connected to the PLC controller and is used to collect the operating parameters of the first engine and the second engine in real time. The operating parameters include speed, power take-off speed, turbine temperature, fuel pressure and lubricating oil pressure. The human-machine interface is connected to the PLC controller and includes operation buttons for issuing start, stop, and emergency stop commands, and display instruments for displaying system status and parameters. The PLC controller acquires data through the CAN communication module, monitors the status through the sensor group, and performs operations through the actuator group.

2. An engine set control method, characterized in that: The method is performed by the system as described in claim 1, and includes the following steps: S1: Power on the first and second engines, establish communication through the CAN communication module, detect and confirm that the initial speed of both engines is 0, and monitor the fuel pressure. S2, determine if the fuel pressure is greater than 30 kPa; if yes, allow the start-up process; if no, wait and issue an alarm. S3, upon receiving the first engine start command and meeting the start permission conditions, controls the opening of its starter motor solenoid valve, monitors its speed in real time, and performs segmented control based on the speed value: S4. Upon receiving the second engine start command, first determine whether the second engine speed is 0 and whether the first engine is not in the start-up process; if the coordination condition is met, execute the same control flow as the first engine coordination start-up step.

3. The engine set control method according to claim 2, characterized in that: The segmented control in S3 includes: When the speed is greater than 300 r / min and the speed of the associated power take-off reaches 300 r / min, control to start its fuel pump; When the speed is greater than 6500 r / min, the throttle push rod is controlled to reduce the oil at intervals to stabilize the speed within the preset range. When the speed exceeds 9000 r / min, a prompt will be made to perform the oiling push rod operation a predetermined number of times until the speed reaches and stabilizes at the rated operating speed.

4. The engine set control method according to claim 3, characterized in that: The predetermined number of times is 3 times to prompt the push of the fuel filler lever, and the rated operating speed is 9500 r / min.

5. The engine set control method according to claim 2, characterized in that: The method also includes real-time monitoring of engine temperature and lubricating oil pressure during engine operation; If the temperature exceeds the first temperature threshold, deceleration control is executed; If the temperature exceeds the higher second temperature threshold, or the lubricating oil pressure exceeds the safe pressure range, an emergency shutdown control will be immediately executed.

6. The engine set control method according to claim 5, characterized in that: The real-time monitoring also includes monitoring the linkage between engine speed and throttle: When the engine speed exceeds 1300 r / min and remains there for the first preset duration, the stop lever is moved to the 80% position to allow manual acceleration. When the engine speed exceeds 1800 r / min and continues for the second preset duration, the stop lever is controlled to the 55% position, allowing further adjustment of the throttle. When the speed exceeds 5000 r / min, it enters the normal throttle control mode and forces the engine to warm up.

7. The engine set control method according to claim 5, characterized in that: The first temperature threshold is 690°C, and the second temperature threshold is 730°C; the safe pressure range is less than 0.2 kg or greater than 3.5 kg.

8. The engine set control method according to claim 6, characterized in that: The first preset duration is 50 seconds, and the second preset duration is 10 seconds.

9. The engine set control method according to claim 2, characterized in that: The method further includes: Upon receiving a normal shutdown command, the engine is controlled to gradually reduce speed according to a preset procedure, first running in cold mode, then reducing to idle speed, and finally shutting off the fuel supply and ignition system in sequence. Upon receiving an emergency shutdown order, the fuel supply is immediately cut off and maximum fuel reduction is implemented to achieve a rapid shutdown.

10. A snowplow, comprising a vehicle body, characterized in that, The vehicle body is equipped with a blower engine control system as described in claim 1.

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