Sequential supercharging control method and control system for high-speed high-power diesel engine

Abstract

The invention discloses a sequential supercharging control method and system for a high-speed high-power diesel engine. The sequential supercharging control system comprises an STC controller, a remote control interface, a machine-side man-machine interaction interface, a sensor and an actuator. The STC controller is in bidirectional connection with the remote control interface and the machine-side man-machine interaction interface, the output end of the STC controller is electrically connected with the input end of the actuator, and the output end of the sensor is electrically connected with the input end of the STC controller; the STC controller comprises a single-chip microcomputer and a peripheral circuit of the single-chip microcomputer. According to the sequential supercharging control method and control system for the high-speed high-power diesel engine, it is guaranteed that the diesel engine system can still maintain normal work when individual sensors are damaged, matching of the supercharger and the working condition of the diesel engine is kept till shutdown overhaul conditions are met, and stable and efficient operation of the diesel engine can be guaranteed when the sensors break down.

Description

Technical Field

[0001] The invention relates to the technical field of electrical automation, and in particular to a sequential supercharging control method and control system for a high-speed and high-power diesel engine. Background Art

[0002] With the development of diesel engine technology, the difference between modern high-speed and high-power diesel engines under different working conditions has become increasingly significant. The classic turbocharging system used in traditional diesel engines only uses one or several fixed turbochargers, most of which are configured to match the high working conditions of the diesel engine. This results in poor matching between the diesel engine and the turbocharger under medium and low working conditions, which in turn causes insufficient turbine torque, resulting in a lower turbocharger boost ratio, and ultimately causing a series of diesel engine performance declines such as efficiency and emissions. In response to this characteristic of modern high-power and high-speed diesel engines, sequential supercharging technology came into being.

[0003] The existing sequential supercharging technology does not have a perfect redundant control scheme for the control system when some sensors fail. For the sequential supercharging system (STC system) of high-speed and high-power diesel engines, there is still a lack of sufficient redundant state judgment design to cope with sudden sensor failures, which in turn affects the stable operation of the diesel engine. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a high-speed and high-power diesel engine sequential supercharging control method and control system, which solves the problem of ensuring that the diesel engine system can still maintain normal operation when individual sensors are damaged, and keeps the supercharger matching the diesel engine operating conditions until the conditions for shutdown and maintenance are met, and can effectively solve the problems in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A high-speed, high-power diesel engine sequential supercharging control system, comprising an STC controller, a remote control interface, a machine-side human-machine interaction interface, a sensor and an actuator;

[0006] The STC controller is bidirectionally connected to the remote control interface and the machine-side human-machine interaction interface respectively, the output end of the STC controller is electrically connected to the input end of the actuator, and the output end of the sensor is electrically connected to the input end of the STC controller.

[0007] As a preferred technical solution of the present invention, the STC controller includes a single chip microcomputer and its peripheral circuits;

[0008] The single chip microcomputer is responsible for executing the STC control logic, processing sensor information, processing information interaction with the machine side human-machine interface, processing information interaction with the remote control interface, and issuing control signals;

[0009] The peripheral circuit includes a power supply circuit, an analog quantity input circuit, a speed signal input circuit, a switch quantity input circuit and a switch quantity output circuit.

[0010] As a preferred technical solution of the present invention, the remote control interface includes one or more CAN bus or Ethernet lines and several passive switch input and output lines, which are used for data interaction with superior systems such as diesel engine control systems, ship control consoles, and automobile central control systems, and for connecting the STC system to the comprehensive scheduling of the superior system.

[0011] As a preferred technical solution of the present invention, the machine-side human-machine interaction interface includes a display screen, buttons, indicator lights and buzzer of the control box where the STC controller is located, which is used to convert the acquired information into a form that humans can understand, and convert human instructions into instructions that the STC controller can recognize, so that the machine-side operator can control and monitor the status of the STC system.

[0012] As a preferred technical solution of the present invention, the sensor is used to obtain the working status of the supercharging system on the diesel engine, including a diesel engine speed sensor, a basic supercharger speed sensor, a controlled supercharger speed sensor, a boost air pressure sensor and a control air pressure sensor.

[0013] As a preferred technical solution of the present invention, the actuator is a device that receives an electrical signal from an STC controller to control the controlled supercharger to be put into operation.

[0014] A high-speed, high-power diesel engine sequential supercharging control method defines the working state of the diesel engine by any two of three groups of sensors and executes corresponding supercharger control. Only when two or more groups of sensors fail completely will the sequential supercharging control system lose the ability to sense the diesel engine working condition, and the priority of sensor signal judgment criteria is arranged according to the reliability of physical quantity judgment of the diesel engine working condition, so as to maintain the matching of the supercharger and diesel engine working conditions until the conditions for shutdown and maintenance are met.

[0015] As a preferred technical solution of the present invention, the sequential supercharging system includes five working states, namely, shutdown state, low working state, high working state, low working state to high working state transition state and high working state to low working state transition state;

[0016] The shutdown state is the working state of the supercharger when the diesel engine is in the shutdown state. When the speed information collected by the sequential supercharging system meets the shutdown state judgment conditions, it will automatically switch from the low working condition to the high working condition. It is also the default state of the system when the program is started. At this time, the controlled supercharger will not be put into operation;

[0017] The low operating state is the state in which the controlled supercharger is not put into operation when the diesel engine is working. When the diesel engine starts to idle, it will automatically switch from the shutdown state to the low operating state, and after switching from the high operating state to the low operating state, it will switch from the high operating state to the low operating state through a transition state;

[0018] After the diesel engine enters the high operating condition, it will go through a transition state to the high operating condition state, and after the diesel engine stops, it will switch to the shutdown state;

[0019] The high operating state is a state where the diesel engine is in a high operating state and the controlled supercharger is put into operation. When the diesel engine enters the high operating state, it will enter from the low operating state via a transition state;

[0020] When the diesel engine enters a low operating condition, it switches to a low operating condition through a transition state, and when it switches directly to a shutdown state from a high operating condition, it directly switches to a shutdown state;

[0021] The low operating condition to high operating condition transition state and the high operating condition to low operating condition transition state are conversion states between the low operating condition state and the high operating condition state, and new operating condition switching commands cannot be accepted in the transition state.

[0022] As a preferred technical solution of the present invention, the judgment conditions for switching from the low working condition to the high working condition are as follows. When any one of the conditions is met, it is considered that the sequential supercharging system needs to switch to the high working condition:

[0023] 1) When the diesel engine speed exceeds the high-operating diesel engine speed threshold, and the basic supercharger 1 exceeds the high-operating supercharger speed threshold;

[0024] 2) When the diesel engine speed exceeds the high-operating diesel engine speed threshold, and the basic supercharger 2 exceeds the high-operating supercharger speed threshold;

[0025] 3) When both basic turbochargers 1 and 2 have sensor failures, the diesel engine speed is greater than the diesel engine speed high operating condition threshold, and the boost pressure of bank A is greater than the high operating condition boost pressure threshold;

[0026] 4) When both basic turbochargers 1 and 2 have sensor failures, the diesel engine speed is greater than the diesel engine speed high operating condition threshold, and the boost pressure of bank B is greater than the high operating condition boost pressure threshold;

[0027] 5) In the case of a diesel engine speed sensor failure, the speed of the basic turbocharger 1 exceeds the high-operating turbocharger speed threshold, and the boost pressure of bank A is greater than the high-operating boost pressure threshold;

[0028] 6) In the case of a diesel engine speed sensor failure, the speed of the basic turbocharger 1 exceeds the high-operating turbocharger speed threshold, and the boost pressure of the bank B is greater than the high-operating boost pressure threshold;

[0029] 7) In the case of a diesel engine speed sensor failure, the speed of the basic turbocharger 2 exceeds the high-operating turbocharger speed threshold, and the boost pressure of the A column is greater than the high-operating boost pressure threshold;

[0030] 8) In the case of a diesel engine speed sensor failure, the speed of the basic turbocharger 2 exceeds the high-operating turbocharger speed threshold, and the boost pressure of the B bank is greater than the high-operating boost pressure threshold;

[0031] As a preferred technical solution of the present invention, the judgment conditions for switching from the high working condition to the low working condition are as follows. When any one of the conditions is met, it is considered that the sequential supercharging system needs to switch to the low working condition:

[0032] 1) The diesel engine speed enters the low operating diesel engine speed range;

[0033] 2) The basic supercharger 1 enters the low operating supercharger speed range;

[0034] 3) The basic supercharger 2 enters the low operating supercharger speed range;

[0035] 4) When there is a sensor failure at both basic supercharger speeds 1 and 2, the boost pressure of bank A enters the low operating boost pressure range;

[0036] 5) When there is a sensor failure at both basic supercharger speeds 1 and 2, the boost pressure of bank B enters the low operating boost pressure range.

[0037] Compared with the prior art, the beneficial effects of the present invention are as follows: the high-speed, high-power diesel engine sequential supercharging control method and control system enable the sequential supercharging system to reliably obtain diesel engine operating condition information for adjusting the input status of the controlled supercharger, and at the same time ensure stable and efficient operation of the diesel engine when a sensor failure occurs. It plays an important role in ensuring operation when the diesel engine is used as the main push of the ship system and the ship is in navigation, when the diesel locomotive is traveling on a railway trunk road, when the diesel vehicle is at high speed or in other locations where it cannot be stopped for maintenance, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a system structure diagram of the control system of the present invention;

[0039] Figure 2 It is a working state block diagram of the sequential boosting system of the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See also Figure 1 The present invention provides a technical solution: a high-speed and high-power diesel engine sequential supercharging control system, including an STC controller, a remote control interface, a machine-side human-machine interaction interface, a sensor and an actuator. The STC controller is bidirectionally connected to the remote control interface and the machine-side human-machine interaction interface respectively, the output end of the STC controller is electrically connected to the input end of the actuator, and the output end of the sensor is electrically connected to the input end of the STC controller.

[0042] The remote control interface includes one or more CAN bus or Ethernet lines and several passive switch input and output lines, which are used for data exchange with superior systems such as diesel engine control systems, ship control consoles, and automobile central control systems, and for connecting the STC system to the comprehensive scheduling of the superior system.

[0043] The machine-side human-machine interaction interface includes the display screen, buttons, indicator lights and buzzer of the control box where the STC controller is located. It is used to convert the acquired information into a form that people can understand, and convert human commands into commands that the STC controller can recognize, so that the machine-side operator can control and monitor the status of the STC system.

[0044] The sensors are used to obtain the working status of the supercharging system on the diesel engine, including the diesel engine speed sensor, the basic supercharger 1 speed sensor, the basic supercharger 2 speed sensor, the controlled supercharger speed sensor, the A bank supercharged air pressure, the B bank supercharged air pressure and the control air pressure sensor.

[0045] The actuator is a device that receives the electrical signal of the STC controller to control the controlled supercharger to be put into operation. According to the driving principle of the actuator on the diesel engine, it can be divided into pneumatic, hydraulic and electric actuators. In some embodiments using a pneumatic system, the solenoid valve is set to switch the controlled supercharger into operation after the power is turned off, and the compressed air is turned on. In this way, it can effectively avoid the controlled supercharger from quitting working due to the loss of power or failure of the solenoid valve when the diesel engine is running at high working conditions, thereby causing damage to the diesel engine.

[0046] In terms of system structure, the CAN bus is used to realize the communication connection between the STC controller and the superior control system, and the remote control supercharger control command transmitted from the superior control system is transmitted through several sets of hard wires. The STC controller and the human-machine interface are both set in an STC control box, and the communication between the STC controller and the human-machine interface display screen is carried out through the communication line in the box;

[0047] The buttons and knobs on the panel are connected to the switch input port of the STC controller;

[0048] The buzzer output port of STC is connected in series between the panel buzzer and the positive power supply inside the control box through a wire, which is used for the sound transmission of alarm information. Magnetoelectric speed sensors are installed next to the flywheel of the diesel engine, the speed collection wheels of the basic turbochargers 1 and 2 turbines, and the speed collection wheel of the controlled turbocharger 1; the A and B columns in the intake pipe are respectively provided with boost air pressure sensors. These sensors are integrated into a unified wiring harness through the reserved stuffing box on the STC control box and enter the STC control box and finally connected to the STC controller;

[0049] The actuator of the control system uses a pneumatic system. The compressed air is controlled by the solenoid valve in the control box to operate the actuator. The solenoid valve is set to connect the compressed air and switch the controlled supercharger into operation after the power is cut off. This avoids the controlled supercharger from quitting working due to power loss or failure of the solenoid valve when the diesel engine is running at high operating conditions, thereby causing damage to the diesel engine.

[0050] The STC controller includes a single chip microcomputer and its peripheral circuits;

[0051] The single-chip microcomputer is responsible for executing the STC control logic, processing sensor information, processing information interaction with the machine side human-machine interface, processing information interaction with the remote control interface, and issuing control signals;

[0052] The peripheral circuit includes a power supply circuit, an analog input circuit, a speed signal input circuit, a switch input circuit and a switch output circuit;

[0053] The power circuit module is responsible for providing a stable internal power supply of the STC controller that is isolated from the external power input, and providing each peripheral module and the microcontroller of the STC controller with their own isolated power supply that matches the module supply voltage. It mainly plays the role of power supply filtering, voltage reduction, and safety isolation.

[0054] The analog input circuit is responsible for converting the external sensor signal input to the analog input interface of the STC controller into a voltage signal that can be sampled by the corresponding single-chip microcomputer isolated from the signal, playing the role of analog conversion and isolation protection;

[0055] The speed signal input circuit is responsible for converting the incoming sine wave frequency signal into a square wave signal that can be received by the microcontroller, playing the role of signal conversion and isolation protection;

[0056] The switch quantity input circuit is responsible for converting the passive / active switch quantity input into an active switch quantity signal that can be received by the single chip microcomputer which is isolated from the input signal, and plays the role of switch quantity signal conversion and isolation protection;

[0057] The switch output module is used to convert the active switch signal output by the microcontroller into the switch output of the STC controller, and plays the role of switch output conversion and isolation protection.

[0058] In terms of program design, the main functions of the system are divided into several software modules according to control requirements, including switch input acquisition, analog input acquisition, high-speed counter acquisition, controlled supercharger control, alarm status judgment and communication processing. The program enters the main working loop after initialization. In order to ensure the real-time performance of the system, the system uses simulated multi-threading to schedule the operation of each module. The time used for a single call of each module is limited to the maximum allowed time slice length, ensuring the running time of each large loop while ensuring that all modules are executed in this large loop, effectively improving the real-time performance of the program.

[0059] The switch input acquisition is used to obtain the working commands received by the control system. All external switch inputs are obtained from this functional module, such as the control strategy used (manual / automatic), response and reset to the alarm, etc.

[0060] The analog input acquisition module and the high-speed counter acquisition module are used to collect information such as the rotation speed and boost air pressure obtained by the sensor, and store them in the specified buffer after filtering.

[0061] The controlled supercharger control module determines the current supercharger operating state and the control strategy currently used through the input of the first three modules and the current working mode.

[0062] The alarm status judgment module makes judgments based on the collected information and the set alarm points, and sends alarms and sensor failure information to the machine side and remote control location.

[0063] The communication processing module packages and sends variables and state quantities, and receives instructions from the communication module.

[0064] The control method used in the above-mentioned controlled supercharger control program module is the control scheme of the sequential supercharging system given by the present invention, which is divided into states according to the working states of the sequential supercharger and the diesel engine. Figure 2 As shown;

[0065] The control method is divided into manual control and automatic control. In manual control, the automatic control is not performed and the operator obtains full control of the controlled supercharger.

[0066] Manual control will not interrupt the control behavior of other control strategies that are in the process of switching. That is, if the sequential boosting system is in a transition state, the manual control strategy will not execute the switching command from the machine side / remote control. The switching command from the machine side / remote control will only be accepted when the sequential boosting system reaches a certain steady-state working state.

[0067] The sequential boosting system includes five working states, namely shutdown state, low working condition state, high working condition state, transition state from low working condition to high working condition and transition state from high working condition to low working condition. Among them, shutdown state, low working condition state and high working condition state are stable states, while transition state from low working condition to high working condition and transition state from high working condition to low working condition are unstable states.

[0068] The shutdown state is the working state of the supercharger when the diesel engine is in the shutdown state. When the speed information collected by the sequential supercharging system meets the shutdown state judgment conditions, it will automatically switch from the low working condition to the high working condition. It is also the default state of the system when the program is started. At this time, the controlled supercharger will not be put into operation;

[0069] The low operating state is the state in which the controlled supercharger is not put into operation when the diesel engine is working; when the diesel engine starts to idle, it will automatically switch from the shutdown state to the low operating state, and after switching from the high operating state to the low operating state, it will switch from the high operating state to the low operating state through a transition state;

[0070] After the diesel engine enters the high operating condition, it will go through a transition state to the high operating condition state, and after the diesel engine stops, it will switch to the shutdown state;

[0071] The high operating state is the state where the diesel engine is in a high operating state and the controlled supercharger is put into operation. When the diesel engine enters the high operating state, it will enter from the low operating state through a transition state;

[0072] When the diesel engine enters a low operating condition, it switches to a low operating condition through a transition state, and when it switches directly to a shutdown state from a high operating condition, it directly switches to a shutdown state;

[0073] The transition state from low operating condition to high operating condition and the transition state from high operating condition to low operating condition are the conversion states between the low operating condition and the high operating condition. In the transition state, no new operating condition switching command can be accepted.

[0074] In this control method, the two transition states here can only be entered from a unique stable state, and there is only one transition state.

[0075] Most of the failures of magnetoelectric speed sensors are caused by signal interruption, which is manifested as a speed of 0. In the case of failure of 4-20mA pressure transmitters, most of them are caused by signal interruption or line short circuit, which is manifested as a current of less than 3.5mA or greater than 20.5mA. According to the analysis of the principles of these two sensors, the probability of other types of failures is small enough, and it can be considered that the sensor failure is only composed of the above three situations. Therefore, in actual control, it is possible to judge whether the sensor is faulty by abnormal input, that is, when the diesel engine has a speed, the supercharger speed 1 and 2 should not be 0. If the supercharger speed is 0, then according to the above sensor failure phenomenon, it can be considered that the supercharger speed sensor is faulty; if only one of the superchargers 1 and 2 is 0, it can be considered that the speed sensor is faulty; when at least one of the supercharger speeds 1 or 2 is not 0, if the diesel engine speed is 0, it can be considered that the diesel engine speed sensor is faulty.

[0076] The condition of the boost air pressure transmitter failure can be easily obtained through the input value, that is, when the input AD sampling value exceeds the interval of the AD sampling value corresponding to 3.5~20.5mA, it can be considered that the sensor is faulty.

[0077] When the diesel engine enters high operating condition, the values ​​that can most reliably and accurately reflect the working status of the diesel engine are the diesel engine speed and the basic turbocharger 1 and 2 speeds; the change of the boost air pressure can also indirectly reflect the working status of the turbocharger, but because the boost pressure is affected by many factors such as the diesel engine working time, ambient air pressure, ambient temperature, etc., it is not as reliable as the diesel engine speed and turbocharger speed. Therefore, when making judgments, the diesel engine speed and turbocharger speed should be used as the criteria with higher priority.

[0078] When judging whether the diesel engine has entered a low operating condition, the values ​​that can most reliably and accurately reflect the working status of the diesel engine are the diesel engine speed and the basic turbocharger 1 and 2 speeds. Therefore, the diesel engine speed and turbocharger speed are selected as the priority judgment. When the diesel engine speed and / or turbocharger speed fails, the boost air pressure is used as the judgment criterion.

[0079] The transition condition to the shutdown state is that the turbocharger speed and the diesel engine speed are both 0, and the transition condition is that at least one of the diesel engine speed and the basic turbocharger 1 and 2 speeds is not 0.

[0080] For the conversion between the high operating state and the low operating state, when the diesel engine operating state does not match the working state of the sequential supercharger, the sequential supercharging system will switch the working state. In this embodiment, according to the criterion scheme provided by the present invention, the following composite criterion is used to judge the working state:

[0081] The judgment conditions for switching from low working condition to high working condition are as follows. When any one of them is true, it is considered that the sequential supercharging system needs to switch to high working condition:

[0082] 1) When the diesel engine speed exceeds the high-operating diesel engine speed threshold, and the basic supercharger 1 exceeds the high-operating supercharger speed threshold;

[0083] 2) When the diesel engine speed exceeds the high-operating diesel engine speed threshold, and the basic supercharger 2 exceeds the high-operating supercharger speed threshold;

[0084] 3) When both basic turbochargers 1 and 2 have sensor failures, the diesel engine speed is greater than the diesel engine speed high operating condition threshold, and the boost pressure of bank A is greater than the high operating condition boost pressure threshold;

[0085] 4) When both basic turbochargers 1 and 2 have sensor failures, the diesel engine speed is greater than the diesel engine speed high operating condition threshold, and the boost pressure of bank B is greater than the high operating condition boost pressure threshold;

[0086] 5) In the case of a diesel engine speed sensor failure, the speed of the basic turbocharger 1 exceeds the high-operating turbocharger speed threshold, and the boost pressure of bank A is greater than the high-operating boost pressure threshold;

[0087] 6) In the case of a diesel engine speed sensor failure, the speed of the basic turbocharger 1 exceeds the high-operating turbocharger speed threshold, and the boost pressure of the bank B is greater than the high-operating boost pressure threshold;

[0088] 7) In the case of a diesel engine speed sensor failure, the speed of the basic turbocharger 2 exceeds the high-operating turbocharger speed threshold, and the boost pressure of the A column is greater than the high-operating boost pressure threshold;

[0089] 8) In the case of a diesel engine speed sensor failure, the speed of the basic turbocharger 2 exceeds the high-operating turbocharger speed threshold, and the boost pressure of the B bank is greater than the high-operating boost pressure threshold;

[0090] The judgment conditions for switching from high working condition to low working condition are as follows. When any one of them is true, it is considered that the sequential supercharging system needs to switch to low working condition:

[0091] 1) The diesel engine speed enters the low operating diesel engine speed range;

[0092] 2) The basic supercharger 1 enters the low operating supercharger speed range;

[0093] 3) The basic supercharger 2 enters the low operating supercharger speed range;

[0094] 4) When there is a sensor failure at both basic supercharger speeds 1 and 2, the boost pressure of bank A enters the low operating boost pressure range;

[0095] 5) When there is a sensor failure at both basic supercharger speeds 1 and 2, the boost pressure of bank B enters the low operating boost pressure range.

[0096] In this embodiment, the sequential supercharging system can define the working state of the diesel engine through any two of the three groups of sensors (diesel engine speed, supercharger speed, and boost air pressure) and execute corresponding supercharger control. Only when two or more groups of sensors fail completely will the sequential supercharging control system lose the ability to perceive the diesel engine working condition, and arrange the priority of the sensor signal judgment criteria according to the reliability of the physical quantity in judging the diesel engine working condition, thereby further improving the reliability of the judgment. For many applications that cannot be easily shut down for maintenance, the diesel engine sequential supercharging system can be better and more reliably guaranteed to always work in a gear that matches the diesel engine working condition, thereby ensuring that the diesel engine's power, efficiency, emissions and other performance will not be significantly affected by the failure of one or two sensors.

[0097] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-speed, high-power diesel engine sequential supercharging control system, characterized in that: Including STC controller, remote control interface, machine-side human-machine interaction interface, sensors and actuators; The STC controller is bidirectionally connected to the remote control interface and the machine-side human-machine interaction interface respectively, the output end of the STC controller is electrically connected to the input end of the actuator, and the output end of the sensor is electrically connected to the input end of the STC controller.

2. A high-speed, high-power diesel engine sequential supercharging control system according to claim 1, characterized in that: The STC controller includes a single chip microcomputer and its peripheral circuits; The single chip microcomputer is responsible for executing the STC control logic, processing sensor information, processing information interaction with the machine side human-machine interface, processing information interaction with the remote control interface, and issuing control signals; The peripheral circuit includes a power supply circuit, an analog quantity input circuit, a speed signal input circuit, a switch quantity input circuit and a switch quantity output circuit.

3. A high-speed, high-power diesel engine sequential supercharging control system according to claim 1, characterized in that: The remote control interface includes one or more CAN bus or Ethernet lines and several passive switch input and output lines, which are used for data interaction with superior systems such as diesel engine control systems, ship control consoles, and automobile central control systems, and for connecting the STC system to the comprehensive scheduling of the superior system.

4. A high-speed, high-power diesel engine sequential supercharging control system according to claim 1, characterized in that: The machine-side human-machine interaction interface includes a display screen, buttons, indicator lights and buzzer of the control box where the STC controller is located, which is used to convert the acquired information into a form that humans can understand, and convert human instructions into instructions that the STC controller can recognize, so that the machine-side operator can control and monitor the status of the STC system.

5. A high-speed, high-power diesel engine sequential supercharging control system according to claim 1, characterized in that: The sensors are used to obtain the working status of the supercharging system on the diesel engine, and include a diesel engine speed sensor, a basic supercharger speed sensor, a controlled supercharger speed sensor, a supercharged air pressure sensor, and a control air pressure sensor.

6. A high-speed, high-power diesel engine sequential supercharging control system according to claim 1, characterized in that: The actuator is a device that receives an electrical signal from an STC controller to control the controlled supercharger to be put into operation.

7. A control method for a high-speed, high-power diesel engine sequential supercharging control system as claimed in claims 1 to 6, characterized in that: The working state of the diesel engine is defined by any two of the three groups of sensors, and the corresponding supercharger control is executed. Only when two or more groups of sensors fail completely, the sequential boost control system will lose the ability to perceive the diesel engine working condition, and arrange the priority of the sensor signal judgment criteria according to the reliability of the physical quantity to judge the diesel engine working condition, so as to keep the supercharger matching the diesel engine working condition until the conditions for shutdown and maintenance are met.

8. A high-speed, high-power diesel engine sequential supercharging control method according to claim 7, characterized in that: The sequential pressurization system includes five working states, namely, shutdown state, low working state, high working state, low working state to high working state transition state and high working state to low working state transition state; The shutdown state is the working state of the supercharger when the diesel engine is in the shutdown state. When the speed information collected by the sequential supercharging system meets the shutdown state judgment conditions, it will automatically switch from the low working condition to the high working condition. It is also the default state of the system when the program is started. At this time, the controlled supercharger will not be put into operation; The low operating state is the state in which the controlled supercharger is not put into operation when the diesel engine is working. When the diesel engine starts to idle, it will automatically switch from the shutdown state to the low operating state, and after switching from the high operating state to the low operating state, it will switch from the high operating state to the low operating state through a transition state; After the diesel engine enters the high operating condition, it will go through a transition state to the high operating condition state, and after the diesel engine stops, it will switch to the shutdown state; The high operating state is a state where the diesel engine is in a high operating state and the controlled supercharger is put into operation. When the diesel engine enters the high operating state, it will enter from the low operating state via a transition state; When the diesel engine enters a low operating condition, it switches to a low operating condition through a transition state, and when it switches directly to a shutdown state from a high operating condition, it directly switches to a shutdown state; The low operating condition to high operating condition transition state and the high operating condition to low operating condition transition state are conversion states between the low operating condition state and the high operating condition state, and new operating condition switching commands cannot be accepted in the transition state.

9. A high-speed, high-power diesel engine sequential supercharging control method according to claim 8, characterized in that: The judgment conditions for switching from the low working condition to the high working condition are as follows. When any one of the conditions is met, it is considered that the sequential supercharging system needs to switch to the high working condition: 1) When the diesel engine speed exceeds the high-operating diesel engine speed threshold, and the basic supercharger 1 exceeds the high-operating supercharger speed threshold; 2) When the diesel engine speed exceeds the high-operating diesel engine speed threshold, and the basic supercharger 2 exceeds the high-operating supercharger speed threshold; 3) When both basic turbochargers 1 and 2 have sensor failures, the diesel engine speed is greater than the diesel engine speed high operating condition threshold, and the boost pressure of bank A is greater than the high operating condition boost pressure threshold; 4) When both basic turbochargers 1 and 2 have sensor failures, the diesel engine speed is greater than the diesel engine speed high operating condition threshold, and the boost pressure of bank B is greater than the high operating condition boost pressure threshold; 5) In the case of a diesel engine speed sensor failure, the speed of the basic turbocharger 1 exceeds the high-operating turbocharger speed threshold, and the boost pressure of bank A is greater than the high-operating boost pressure threshold; 6) In the case of a diesel engine speed sensor failure, the speed of the basic turbocharger 1 exceeds the high-operating turbocharger speed threshold, and the boost pressure of the bank B is greater than the high-operating boost pressure threshold; 7) In the case of a diesel engine speed sensor failure, the speed of the basic turbocharger 2 exceeds the high-operating turbocharger speed threshold, and the boost pressure of the A column is greater than the high-operating boost pressure threshold; 8) When the diesel engine speed sensor fails, the speed of the basic turbocharger 2 exceeds the high-operating turbocharger speed threshold, and the boost pressure of the bank B is greater than the high-operating boost pressure threshold.

10. A high-speed, high-power diesel engine sequential supercharging control method according to claim 8, characterized in that: The judgment conditions for the high working condition to the low working condition are as follows. When any one of the conditions is met, it is considered that the sequential supercharging system needs to be switched to the low working condition: 1) The diesel engine speed enters the low operating diesel engine speed range; 2) The basic supercharger 1 enters the low operating supercharger speed range; 3) The basic supercharger 2 enters the low operating supercharger speed range; 4) When there is a sensor failure at both basic supercharger speeds 1 and 2, the boost pressure of bank A enters the low operating boost pressure range; 5) When there is a sensor failure at both basic supercharger speeds 1 and 2, the boost pressure of bank B enters the low operating boost pressure range.

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