Engine control system

Abstract

The utility model relates to the field of engines, and provides an engine control system which comprises an engine used for providing mechanical energy for a load; the reversible motor is used for providing electric energy for a load; the gearbox is connected with the engine and the reversible motor and used for switching the working states of the engine and the reversible motor; and the PLC is electrically connected with the engine and the reversible motor, and monitors and controls the working states of the engine and the reversible motor in real time. The ship engine control method and device are used for overcoming the defect that in the prior art, the precision degree of a mode of controlling a ship main engine through a mechanical handle is not high, an engine of a ship is accurately controlled through a PLC, automation of ship main engine control can be achieved, errors caused by manual operation are reduced, and the response speed and stability of a system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an engine control system. Background Art

[0002] Ship engine control is one of the core elements of ship automation systems. In the prior art, the ship main engine is generally responsible for driving the ship forward. Traditionally, the ship main engine is controlled by a mechanical handle. However, in a complex marine environment, in order to ensure the safety of the ship's driving, it is necessary to accurately control the power, speed and direction of the ship main engine. The traditional method of controlling the ship main engine with a mechanical handle cannot meet the needs of precise control. Utility Model Content

[0003] The utility model provides an engine control system to solve the defect of low accuracy of the method of controlling the ship's main engine with a mechanical handle in the prior art. In the solution of the present application, the ship's engine is accurately controlled by a PLC controller, so that the ship's main engine control can be automated, the errors of human operation can be reduced, and the response speed and stability of the system can be improved.

[0004] The utility model provides an engine control system, comprising:

[0005] Engine, used to provide mechanical energy to the load;

[0006] A reversible motor for supplying electrical energy to a load;

[0007] A gear box, connecting the engine and the reversible motor, and used for switching the working states of the engine and the reversible motor;

[0008] The PLC controller is electrically connected to the engine and the reversible motor, and monitors and controls the working status of the engine and the reversible motor in real time. The working status includes electric propulsion mode, mechanical propulsion mode, hybrid propulsion mode and charging propulsion mode. In the electric propulsion mode, the engine does not work, and the reversible motor works as a motor; in the mechanical propulsion mode, the engine works, and the reversible motor does not work; in the hybrid propulsion mode, the engine works, and the reversible motor works as a motor; in the charging propulsion mode, the engine works, and the reversible motor works as a generator.

[0009] According to the engine control system provided by the utility model, the engine includes a natural gas engine.

[0010] According to the engine control system provided by the utility model, the load includes a dynamometer;

[0011] A dynamometer is used to measure the output torque of an engine.

[0012] According to the engine control system provided by the utility model, the gearbox includes a first clutch and a second clutch;

[0013] The output end of the engine is connected to the input end of the first clutch, and the output end of the first clutch is connected to the input end of the second clutch and the load;

[0014] The output end of the second clutch is mechanically connected to the reversible motor.

[0015] The engine control system provided by the utility model further includes an energy storage unit, which is electrically connected to the engine and the reversible motor; the energy storage unit is used to store the electrical energy generated by the engine and the reversible motor;

[0016] The energy storage unit includes a lithium iron phosphate battery.

[0017] According to the engine control system provided by the utility model, the PLC controller includes:

[0018] An engine electronic control unit, electrically connected to the engine;

[0019] A battery management system is electrically connected to the energy storage unit.

[0020] According to the engine control system provided by the utility model, the PLC controller also includes:

[0021] A frequency conversion control unit electrically connected to the reversible motor;

[0022] A gearbox control unit, electrically connected to the gearbox;

[0023] a clutch control unit, electrically connected to the clutch;

[0024] The dynamometer electronic control unit is electrically connected to the dynamometer.

[0025] In the engine control system provided by the utility model, a PLC controller is provided, and the PLC controller is connected to the engine and the reversible motor. The PLC controller can control the state of the gearbox, and then adjust the working states of the engine and the reversible motor to form four different working states, so that hybrid power starting can be achieved and the starting time of the engine can be reduced. The equipment of the power supply unit can also be centrally controlled and monitored through the PLC controller, and the load condition of the power supply unit can be monitored in real time, and the operating state of the generator set can be adjusted to maintain the stability of the entire power system. In addition, the PLC controller can also automatically switch the connection between the power supply unit and the corresponding load to ensure the reliability and safety of the ship's power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is one of the structural schematic diagrams of the engine control system provided by the embodiment of the utility model;

[0028] Figure 2 This is the second structural schematic diagram of the engine control system provided by the embodiment of the utility model;

[0029] Figure 3 This is the third structural schematic diagram of the engine control system provided by the embodiment of the utility model;

[0030] Figure 4 This is one of the circuit structure diagrams of the engine control system provided by the embodiment of the utility model;

[0031] Figure 5 This is the second circuit structure diagram of the engine control system provided by the embodiment of the utility model;

[0032] Figure 6 This is the third circuit structure diagram of the engine control system provided by the embodiment of the utility model. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] The ship hybrid power test platform is a complex test system that can simulate the operating conditions and design conditions of the actual ship hybrid power system and monitor the operating parameters of the hybrid power system under various conditions in real time.

[0035] The ship parallel gas-electric hybrid power system is mainly composed of a natural gas engine, a permanent magnet synchronous reversible motor, a gearbox, a clutch, a dynamometer, a lithium iron phosphate battery system, a DC networking system (including a DC converter on the lithium iron phosphate battery side, an inverter on the permanent magnet synchronous motor side, a rectifier on the AC power side, etc.), and the controllers include an engine control system, a motor control system, a gearbox control system, a clutch control system, a lithium iron phosphate battery management system (BMS), a dynamometer control system, an energy management system, etc.

[0036] The ship's engine control is one of the cores of the ship's automation system. The traditional ship engine control method cannot adapt to the complex marine environment. Based on this, the utility model provides a new type of engine control system, which can detect and control the engine's working status in real time through a PLC controller, and combine with a power supply unit to form a hybrid power system. It can receive signals through the PLC and automatically adjust the host system parameters according to a preset algorithm to achieve precise control and realize the automation of the ship's host control, reduce human operation errors, and improve the system's response speed and stability. At the same time, it can also analyze the actual operating conditions of the hybrid power system, comprehensively consider the economy, emissions, and power, and take into account factors such as the stability of the power grid and the reliability of the gearbox connection, and reasonably match and optimize the system energy flow to achieve optimal comprehensive performance, thereby designing a reasonable energy management strategy.

[0037] The specific implementation of the engine control system provided by the utility model is as follows.

[0038] Figure 1 It is one of the structural schematic diagrams of the engine control system provided by the embodiment of the utility model.

[0039] like Figure 1 As shown, this embodiment provides an engine control system, including:

[0040] Engine, used to provide mechanical energy to the load;

[0041] A reversible motor for supplying electrical energy to a load;

[0042] A gear box, connecting the engine and the reversible motor, and used for switching the working states of the engine and the reversible motor;

[0043] The PLC controller is electrically connected to the engine and the reversible motor, and monitors and controls the working status of the engine and the reversible motor in real time. The working status includes electric propulsion mode, mechanical propulsion mode, hybrid propulsion mode and charging propulsion mode. In the electric propulsion mode, the engine does not work, and the reversible motor works as a motor; in the mechanical propulsion mode, the engine works, and the reversible motor does not work; in the hybrid propulsion mode, the engine works, and the reversible motor works as a motor; in the charging propulsion mode, the engine works, and the reversible motor works as a generator.

[0044] In practical applications, the engine may be a natural gas engine.

[0045] In actual applications, the PLC controller, as the main controller of the entire system, can use Phoenix's high-performance industrial PLC, whose products provide comprehensive solutions, mainly including bus communication, power measurement, etc. In addition, Phoenix Electric's full range of products have passed the necessary maritime certification. Data collection, control, regulation and networking of various applications on board ensure improved maritime application efficiency.

[0046] The power supply unit in this embodiment includes the main generator set, the auxiliary generator set and various power equipment, which can be centrally controlled and monitored by the PLC controller. The PLC can detect the load of the power system in real time and adjust the operating status of the generator set to maintain the stability of the entire power system. In addition, the PLC can also automatically switch the connection between the generator set and the power load to ensure the reliability and safety of the ship's power system.

[0047] In the engine control system provided in the present embodiment, a PLC controller is provided, and the PLC controller is connected to the engine and the reversible motor. The PLC controller can control the state of the gearbox, and then adjust the working states of the engine and the reversible motor to form four different working states, so that hybrid power starting can be achieved and the starting time of the engine can be reduced. The PLC controller can also centrally control and monitor the equipment of the power supply unit, monitor the load condition of the power supply unit in real time, and adjust the operating state of the generator set to maintain the stability of the entire power system. In addition, the PLC controller can also automatically switch the connection between the power supply unit and the corresponding load to ensure the reliability and safety of the ship's power system.

[0048] In addition, the engine control system provided in this embodiment can be applied to a gas-electric hybrid power system, which can effectively reduce energy consumption and emissions. Specifically, since the engine has the disadvantages of slow response, low torque and poor emissions when starting, and the electric motor has the advantages of fast starting response, large low-speed torque and clean and pollution-free, the electric motor can be used to achieve rapid starting of the hybrid power system, and the electric motor can also be used to assist in starting the engine to reduce the starting time of the engine; the parallel hybrid power system realizes torque coupling, diversion and decoupling through the gearbox. When the load of the hybrid power system changes or accelerates or decelerates, the electric motor power can be incorporated to supplement the remaining propulsion power demand, so that the engine can always work stably in the high efficiency zone, and the dynamic response of the system can also be improved; under partial load and low load conditions, more electricity is used for propulsion to reduce the fuel consumption of the engine; on an actual gas-electric hybrid ship, the ship can use shore power to charge the battery when docked, which significantly improves the average energy storage rate of the battery, thereby improving the electric propulsion efficiency of the system, and optimizing the battery charge state working range.

[0049] The engine control system of this embodiment makes full use of the advantages of multiple energy sources to complement each other. By using clean fuel and optimizing the matching of the engine within the full load range, the working range of the engine can be optimized, the system efficiency can be effectively improved, and the emission can be greatly reduced. There are mainly four operating modes, as shown in the following table:

[0050] Operation Mode Engine status Reversible motor state Pure electric propulsion mode Not working Motor mode operation Pure mechanical propulsion mode Work Not working Hybrid propulsion mode Work Motor mode operation Charging propulsion mode Work Generator mode operation

[0051] Figure 2 This is the second structural schematic diagram of the engine control system provided by the embodiment of the utility model.

[0052] like Figure 2 As shown, in the exemplary embodiment, the load comprises a dynamometer;

[0053] A dynamometer is used to measure the output torque of an engine.

[0054] In an exemplary embodiment, the gearbox includes a first clutch and a second clutch;

[0055] The output end of the engine is connected to the input end of the first clutch, and the output end of the first clutch is connected to the input end of the second clutch and the load;

[0056] The output end of the second clutch is mechanically connected to the reversible motor.

[0057] In the exemplary embodiment, an energy storage unit is also included, the energy storage unit is electrically connected to the engine and the reversible motor; the energy storage unit is used to store the electrical energy generated by the engine and the reversible motor;

[0058] The energy storage unit includes a lithium iron phosphate battery.

[0059] Figure 3 This is the third structural schematic diagram of the engine control system provided by the embodiment of the utility model.

[0060] like Figure 3 As shown, in the exemplary embodiment, the PLC controller includes:

[0061] An engine electronic control unit, electrically connected to the engine;

[0062] A battery management system is electrically connected to the energy storage unit.

[0063] In an exemplary embodiment, the PLC controller further includes:

[0064] A frequency conversion control unit electrically connected to the reversible motor;

[0065] A gearbox control unit, electrically connected to the gearbox;

[0066] a clutch control unit, electrically connected to the clutch;

[0067] The dynamometer electronic control unit is electrically connected to the dynamometer.

[0068] Figure 4 This is one of the circuit structure diagrams of the engine control system provided by the embodiment of the utility model;

[0069] Figure 5 This is the second circuit structure diagram of the engine control system provided by the embodiment of the utility model;

[0070] Figure 6 This is the third circuit structure diagram of the engine control system provided by the embodiment of the utility model.

[0071] The utility model also provides a circuit structure of an engine control system, such as Figures 4 to 6 As shown, Figure 4 is the system single line diagram, Figure 5 is the circuit diagram of the power supply unit. Figure 6 Schematic diagram of the control loop of the engine control system.

[0072] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, i.e., they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0073] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or some parts of the embodiment.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An engine control system, characterized in that: include: Engine, used to provide mechanical energy to the load; A reversible motor for supplying electrical energy to a load; A gear box, connecting the engine and the reversible motor, and used for switching the working states of the engine and the reversible motor; A PLC controller is electrically connected to the engine and the reversible motor, and monitors and controls the working states of the engine and the reversible motor in real time, wherein the working states include an electric propulsion mode, a mechanical propulsion mode, a hybrid propulsion mode, and a charging propulsion mode. In the electric propulsion mode, the engine does not work, and the reversible motor works as a motor; In the mechanical propulsion mode, the engine works and the reversible motor does not work; in the hybrid propulsion mode, the engine works and the reversible motor works as an electric motor; In the charging propulsion mode, the engine works and the reversible motor works as a generator.

2. The engine control system according to claim 1, characterized in that: The engine comprises a natural gas engine.

3. The engine control system according to claim 1, characterized in that: The load includes a dynamometer; The dynamometer is used to measure the output torque of the engine.

4. The engine control system according to claim 1, characterized in that: The gearbox includes a first clutch and a second clutch; The output end of the engine is connected to the input end of the first clutch, and the output end of the first clutch is connected to the input end of the second clutch and the load; The output end of the second clutch is mechanically connected to the reversible motor.

5. The engine control system according to claim 1, characterized in that: It also includes an energy storage unit, which is electrically connected to the engine and the reversible motor; the energy storage unit is used to store the electrical energy generated by the engine and the reversible motor; The energy storage unit includes a lithium iron phosphate battery.

6. The engine control system according to claim 5, characterized in that: The PLC controller comprises: an engine electronic control unit, electrically connected to the engine; A battery management system is electrically connected to the energy storage unit.

7. The engine control system according to claim 6, characterized in that: The PLC controller also includes: A frequency conversion control unit, electrically connected to the reversible motor; a gearbox control unit, electrically connected to the gearbox; a clutch control unit, electrically connected to the clutch; The dynamometer electronic control unit is electrically connected to the dynamometer.

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