A marine methanol engine injection control system, method and transportation equipment

Abstract

The present invention discloses a marine methanol engine injection control system, method, and transportation equipment. The system comprises an engine control module, a drive control module, a signal module, and a sensor module; the signal module is used to set methanol injection parameters; the engine control module is used to generate a drive enable signal based on the injection parameters; the drive control module is connected to the engine control module; the drive control module is used to drive the engine's injector to inject methanol into the cylinder based on the drive enable signal; the sensor module is connected to the engine control module; the sensor module is used to collect the engine's status signal; the engine control module is further used to obtain the methanol injection amount based on the status signal and the injection parameters, and to provide feedback based on the methanol injection amount. The technical solution of the present invention enables flexible control of the methanol injection amount of a marine methanol engine.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of engine technology, and in particular to a marine methanol engine injection control system, method, and transportation equipment. Background Art

[0002] With the gradual development of clean energy in China, methanol gasoline will become the main direction of clean energy development. In recent years, the application of methanol fuel has been gradually promoted in various fields, generating good economic and environmental benefits. Therefore, methanol-powered engines are also gradually developing in my country.

[0003] As the demand for engine control continues to increase, in the existing technology, the methanol injection amount of the engine is inconvenient to adjust and cannot meet the requirement of flexible adjustment of the methanol injection amount of the engine. Summary of the Invention

[0004] The present invention provides a marine methanol engine injection control system, method and transportation equipment, which can realize flexible control of the methanol injection amount of the marine methanol engine.

[0005] In a first aspect, an embodiment of the present invention provides a marine methanol engine injection control system, comprising: an engine control module, a drive control module, a signal module, and a sensor module;

[0006] The signal module is connected to the engine control module; the signal module is used to set methanol injection parameters;

[0007] The engine control module is used to generate a driving enable signal according to the injection parameter;

[0008] The drive control module is connected to the engine control module; the drive control module is used to drive the injector of the engine to inject methanol into the cylinder according to the drive enable signal;

[0009] The sensor module is connected to the engine control module; the sensor module is used to collect the status signal of the engine; the engine control module is also used to obtain the methanol injection amount according to the status signal and the injection parameters, and provide feedback based on the methanol injection amount.

[0010] Optionally, the state signal includes rail pressure and scavenging pressure, and the injection parameter includes a pulse width value.

[0011] Optionally, the engine control module includes: a calculation unit and a calibration unit;

[0012] The calculation unit calculates the methanol pressure according to the rail pressure, the scavenging pressure and the pulse width value;

[0013] The calibration unit is connected to the calculation unit; the calibration unit is used to obtain the methanol injection amount according to the methanol pressure comparison calibration amount.

[0014] Optionally, CAN communication is adopted among the engine control module, the drive control module and the signal module.

[0015] Optionally, the marine methanol engine injection control system further includes: a security module;

[0016] The security module is connected to the engine control module; the security module is used to obtain the working status of the engine and generate a running signal or a parking signal according to the working status;

[0017] The engine control module is further configured to enter a working state capable of generating the drive enable signal according to the operating signal, or enter a cutoff state in which the generation of the drive enable signal is stopped according to the parking signal.

[0018] Optionally, the engine control module is an ECM board; the drive control module is an ICM board.

[0019] In a second aspect, an embodiment of the present invention provides a marine methanol engine injection control method, which is performed by the marine methanol engine injection control system according to any of the embodiments of the present invention, and the method includes:

[0020] The signal module sets methanol injection parameters;

[0021] The engine control module generates a driving enable signal according to the injection parameter;

[0022] The drive control module drives the injector of the engine to inject methanol into the cylinder according to the drive enable signal;

[0023] The sensor module collects the state signal of the engine; the engine control module also obtains the methanol injection amount according to the state signal and the injection parameter, and provides feedback according to the methanol injection amount.

[0024] Optionally, the state signal includes rail pressure and scavenging pressure, and the injection parameter includes a pulse width value; the engine control module includes: a calculation unit and a calibration unit;

[0025] The method comprises:

[0026] The calculation unit calculates the methanol pressure according to the rail pressure, the scavenging pressure and the pulse width value;

[0027] The calibration unit obtains the methanol injection amount according to the methanol pressure comparison calibration amount.

[0028] Optionally, the marine methanol engine injection control system further includes: a security module;

[0029] The method comprises:

[0030] Before the engine control module generates a driving enable signal according to the injection parameter, the method further includes:

[0031] The security module obtains the working status of the engine and generates a running signal or a stopping signal according to the working status;

[0032] The engine control module enters a working state capable of generating the driving enable signal according to the operating signal, or enters a cut-off state in which the generation of the driving enable signal is stopped according to the parking signal.

[0033] In a third aspect, an embodiment of the present invention provides a transport device, which is driven by methanol or hybrid power and includes the marine methanol engine injection control system described in any embodiment of the present invention.

[0034] The technical solution provided by an embodiment of the present invention utilizes a signal unit to set injection parameters. The engine control module receives the injection parameters and generates a drive enable signal based on the injection parameters. The drive control module then provides a drive current based on the drive enable signal to activate the injector in the methanol engine to inject methanol. Therefore, by setting the injection parameters in the signal module, the amount of methanol injected by the injector can be controlled, thereby flexibly controlling the methanol engine. The engine control module also calculates the amount of methanol injected based on the status signal from the sensor module and the injection parameters, and then feeds the amount of methanol injected back to the signal module. The signal module can then display the engine's methanol injection amount, enabling flexible and automatic control based on the engine's application requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic structural diagram of a marine methanol engine injection control system provided by an embodiment of the present invention.

[0036] Figure 2 Schematic diagram of the calculation process for obtaining the methanol injection amount.

[0037] Figure 3 This is a structural diagram of the communication method between the engine control module, drive control module and signal module.

[0038] Figure 4 A schematic structural diagram of another marine methanol engine injection control system provided in an embodiment of the present invention.

[0039] Figure 5A schematic flow chart of a method for controlling injection of a marine methanol engine provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] Figure 1 A structural diagram of a marine methanol engine injection control system provided by an embodiment of the present invention is shown in FIG. Figure 1 , including: an engine control module 110, a drive control module 120, a signal module 130 and a sensor module 140;

[0042] The signal module 130 is connected to the engine control module 110; the signal module 130 is used to set the methanol injection parameters;

[0043] The engine control module 110 is used to generate a driving enable signal according to the injection parameters;

[0044] The drive control module 120 is connected to the engine control module 110; the drive control module 120 is used to drive the injector of the engine to inject methanol into the cylinder according to the drive enable signal;

[0045] The sensor module 140 is connected to the engine control module 110; the sensor module 140 is used to collect the engine status signal; the engine control module 110 is also used to obtain the methanol injection amount according to the status signal and the injection parameters, and to provide feedback based on the methanol injection amount.

[0046] Specifically, signal module 130 is an interactive module for controlling the interaction between the control system and the user. Signal module 130 includes a display unit, through which injection parameters can be set. Exemplarily, the injection parameters include at least one of the following data parameters: injection timing, injection pulse width, peak current and its duration, and sustaining current and its duration. Engine control module 110 embeds a control program. After receiving the injection parameters, engine control module 110 generates a drive enable signal based on the injection parameters and sends it to drive control module 120. Drive control module 120 embeds a drive program and, based on the drive enable signal, provides a drive current to activate the injector in methanol engine 150, thereby injecting methanol. Exemplarily, the drive current controls a PT2000 electromagnetic actuator, causing the injector to execute the injection operation. Therefore, by setting the injection parameters in signal module 130, the amount of methanol injected by the injector can be controlled, thereby flexibly controlling the methanol engine. Sensor module 140, which may include a temperature sensor, a pressure sensor, and a throttle, collects status signals from methanol engine 150. Exemplarily, the status signal includes at least one of rail pressure, scavenging air pressure, a temperature signal, and throttle opening. Based on the received status signal and injection parameters, the engine control module 110 calculates the methanol injection amount and feeds the methanol injection amount back to the signal module 130. Signal module 130 can then display the engine's methanol injection amount, enabling flexible control based on engine application requirements.

[0047] The technical solution provided by an embodiment of the present invention utilizes a signal unit to set injection parameters. The engine control module receives the injection parameters and generates a drive enable signal based on the injection parameters. The drive control module then provides a drive current based on the drive enable signal to activate the injector in the methanol engine to inject methanol. Therefore, by setting the injection parameters in the signal module, the methanol injection amount of the injector can be controlled, thereby flexibly controlling the methanol engine. The engine control module also calculates the methanol injection amount based on the status signal from the sensor module and the injection parameters, and then feeds the methanol injection amount back to the signal module. The signal module can then display the engine's methanol injection amount, enabling flexible and automatic control based on the engine's application requirements.

[0048] Optionally, the status signal includes rail pressure and scavenging air pressure, and the injection parameter includes a pulse width value.

[0049] Rail pressure is a crucial factor in ensuring proper fuel injection from engine fuel injectors. To maintain this pressure, the injectors continuously supply pressure, which is then maintained via pressure switches or sensors. The scavenging process expel burned gases and draws in fresh air for the next cycle. The scavenging pressure is the pressure required to expel burned gases. The pulse width indicates the duration of each injector's opening. Longer pulse widths result in longer injection times and a richer fuel mixture. Shorter pulse widths result in shorter injection times and a leaner fuel mixture.

[0050] Optionally, the engine control module 110 includes: a calculation unit and a calibration unit;

[0051] The calculation unit calculates the methanol pressure based on the rail pressure, scavenging pressure and pulse width value;

[0052] The calibration unit is connected to the calculation unit; the calibration unit is used to obtain the methanol injection amount according to the methanol pressure comparison calibration amount.

[0053] Specifically, Figure 2 To obtain a schematic diagram of the calculation process for methanol injection amount, see Figure 2 The engine includes two injectors. The injection rate of the first injector 210 is: The calculation unit 220 calculates the methanol pressure U1 injected into the cylinder based on the rail pressure V1 and the scavenging pressure V2. This methanol pressure U1 is input to the calibration unit 230. Based on a pre-stored calibration value U2, the methanol pressure U1 is compared with the calibration value U2 and the corresponding injection rate C1 is obtained. The relationship between the methanol pressure U1 and the calibration value U2 can be obtained and supplemented based on production experience. Similarly, the injection rate C2 of the second injector 211 can be obtained. The total methanol injection rate C is obtained by adding the injection rates of the first and second injectors.

[0054] Optionally, CAN communication is adopted among the engine control module 110 , the drive control module 120 and the signal module 130 .

[0055] Specifically, Figure 3 This is a schematic diagram of the communication structure between the engine control module, drive control module and signal module, combined with Figure 1 , see Figure 3 The engine control module 110, drive control module 120, and signal module 130 all communicate using the same protocol and over a single communication line, reducing communication complexity and ensuring real-time communication. Information feedback between the engine control module 110, drive control module 120, and signal module 130 facilitates data exchange and facilitates data extraction and maintenance between modules.

[0056] Figure 4A structural diagram of another marine methanol engine injection control system provided by an embodiment of the present invention is shown in FIG. Figure 4 , the marine methanol engine injection control system further includes: a security module 410;

[0057] The security module 410 is connected to the engine control module 110; the security module 410 is used to obtain the working status of the engine and generate a running signal or a parking signal according to the working status;

[0058] The engine control module 110 is further configured to enter a working state capable of generating a driving enable signal according to a running signal, or enter a cutoff state in which the generation of the driving enable signal is stopped according to a parking signal.

[0059] Specifically, injecting methanol when the engine is stopped poses a safety hazard. Therefore, the security module 410 detects the engine's operating status and ensures that the engine is in a ready state. If the engine is in a ready state, the security module 410 generates a run signal, and the engine control module 110 can normally generate a drive enable signal based on the injection parameters. If the engine is not in a ready state, the security module 410 generates a stop signal, and the engine control module 110 cannot generate a drive enable signal.

[0060] Optionally, the engine control module 110 is an ECM board; and the drive control module 120 is an ICM board.

[0061] Specifically, the ECM board embeds the control program and receives signals from the signal module 130, the drive control module 120, the security module 410, and the sensor module 140. The ECM board includes multiple communication and signal connection pins, facilitating application expansion. The ICM board embeds the drive program and provides drive current to activate the injectors.

[0062] The control program and driver program are C-based control programs. The control model is generated using SIMULINK and compiled using HighTec's hardware UDE software and programmed into the ECM board. The driver program is compiled using HighTec's hardware UDE software and programmed into the development board. The drive current control program is generated using the PT2000StudioDev software. Signal module 130 communicates with the control program and driver program via the CANopen protocol.

[0063] Simulink is a block diagram environment for multi-domain simulation and model-based design. It supports system design, simulation, automatic code generation, and continuous testing and verification of embedded systems. HighTec is open-source embedded development software with a highly portable compiler. Simulink programs and the CANopen communication protocol were ported to the ECM development board's control runtime. Simultaneously, the PT2000StudioDev current driver and CANopen communication protocol were ported to the ICM development board's driver runtime, ultimately enabling control of methanol engine injection.

[0064] The display unit of the signal module 130 can monitor various parameter indicators of the methanol engine in real time, and the engine parameters can be changed according to actual conditions. At the same time, the collected signal of the sensor module 140 will be read during the operation of the engine, and the operation program will be controlled to perform calculations and judgments, thereby controlling the injection amount of the engine.

[0065] Exemplarily, the methanol engine injection operation process is as follows: initial preparations are complete, for example, the methanol purge valve is in operation and the methanol injection control system is enabled. After the user sets injection parameters using signal module 130, the ECM receives these injection parameters. Simultaneously, the security system determines that the methanol system is permitted to operate. Upon receiving the operation signal, the ECM generates an injection enable signal based on the injection parameters. The ICM provides a driving current based on the injection enable signal, driving the injector to inject methanol. Furthermore, after the injection parameters are input and set, the methanol injection amount is not directly measurable and cannot be directly read. Therefore, a sensor unit is used to collect sensor signals and transmit them to the user. This patent uses user-specified parameters such as pulse width, and then uses sensors to collect engine status signals. Based on the received status signals and the injection parameters, the engine control module 110 calculates the methanol injection amount and provides feedback to the user for further adjustment of the injection amount.

[0066] Figure 5 This is a flow chart of a method for controlling injection of a marine methanol engine provided by an embodiment of the present invention. This embodiment is applicable to methanol engine injection control. The method can be executed by a methanol engine injection control system, which can be implemented using hardware and / or software. The method specifically includes the following steps:

[0067] S110, the signal module sets the methanol injection parameters;

[0068] The injection parameters include at least one of the data parameters such as injection timing, injection pulse width, peak current and duration, and maintenance current and duration of methanol injection.

[0069] S120, the engine control module generates a drive enable signal according to the injection parameters;

[0070] Specifically, a control operation program is embedded in the engine control module. After receiving the injection parameters, the engine control module generates a drive enable signal according to the injection parameters and sends the signal to the drive control module.

[0071] S130, the drive control module drives the injector of the engine to inject methanol into the cylinder according to the drive enable signal;

[0072] Specifically, the drive control module, embedded within the driver program, provides a driving current based on a drive enable signal to activate the injector in the methanol engine, thereby injecting methanol. For example, the drive current controls a PT2000 electromagnetic driver, causing the injector to execute the injection action. Therefore, the amount of methanol injected from the injector can be controlled by setting injection parameters in the signal module, thereby flexibly controlling the methanol engine.

[0073] S140, the sensor module collects the engine status signal; the engine control module also obtains the methanol injection amount according to the status signal and the injection parameters, and provides feedback according to the methanol injection amount.

[0074] Specifically, the sensing module can be composed of a temperature sensor, a pressure sensor, a throttle, etc. The engine control module can obtain the methanol injection amount through calculation based on the received status signal and injection parameters, and then feed the methanol injection amount back to the signal module. Therefore, the methanol injection amount of the engine can be displayed through the signal module so that it can be flexibly controlled according to the application requirements of the engine.

[0075] Optionally, the state signal includes rail pressure and scavenging pressure, and the injection parameter includes a pulse width value; the engine control module includes: a calculation unit and a calibration unit;

[0076] Methods include:

[0077] The calculation unit calculates the methanol pressure based on the rail pressure, scavenging pressure and pulse width value;

[0078] The calibration unit obtains the methanol injection amount according to the methanol pressure comparison calibration amount.

[0079] Specifically, rail pressure is a crucial factor in ensuring proper fuel injection from engine injectors. To maintain this pressure, the injectors continuously supply pressure, which is then maintained via pressure switches or sensors. The scavenging process expel burned gases and draws in fresh air for the next cycle. Scavenging pressure is the pressure at which burned gases are expelled. The pulse width indicates the duration of each injector's opening. Longer pulse widths result in longer injection times and a richer fuel mixture. Shorter pulse widths result in shorter injection times and a leaner fuel mixture.

[0080] The injection amount of the injector is: the calculation unit obtains the methanol pressure injected into the cylinder based on the rail pressure and the scavenging pressure, inputs the methanol pressure into the calibration unit, and compares the methanol pressure with the calibration amount according to the pre-stored calibration amount to obtain the corresponding injection amount. Among them, the calibration relationship between the methanol pressure and the injection amount can be obtained and supplemented based on production experience.

[0081] Optional, marine methanol engine injection control system also includes: security module;

[0082] Methods include:

[0083] Before the engine control module generates a driving enable signal according to the injection parameters, it also includes:

[0084] The security module obtains the working status of the engine and generates a running signal or a parking signal according to the working status;

[0085] The engine control module enters a working state in which the drive enable signal can be generated according to the operation signal, or enters a cut-off state in which the drive enable signal can be stopped according to the parking signal.

[0086] Specifically, injecting methanol while the engine is stopped poses a safety hazard. Therefore, the security module monitors the engine's operating status to ensure it is ready. If the engine is ready, the security module generates a run signal, allowing the engine control module to generate a drive enable signal based on the injection parameters. If the engine is not ready, the security module generates a stop signal, preventing the engine control module from generating a drive enable signal.

[0087] An embodiment of the present invention further provides a transport device, which uses methanol or hybrid power as a driving force and includes the marine methanol engine injection control system of any embodiment of the present invention.

[0088] Specifically, the transportation equipment includes movable transportation equipment such as vehicles, ships and aircraft, wherein the transportation equipment is driven by methanol or hybrid power. The transportation equipment in the embodiment of the present invention includes the marine methanol engine injection control system of any embodiment of the present invention, and therefore has the same beneficial effects as the marine methanol engine injection control system, which will not be repeated here.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention 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 present invention.

Claims

1. A marine methanol engine injection control system, characterized in that: include: Engine control module, drive control module, signal module and sensor module; The signal module is connected to the engine control module; the signal module is used to set methanol injection parameters; The engine control module is used to generate a driving enable signal according to the injection parameter; The drive control module is connected to the engine control module; the drive control module is used to drive the injector of the engine to inject methanol into the cylinder according to the drive enable signal; The sensor module is connected to the engine control module; the sensor module is used to collect the state signal of the engine; the engine control module is further used to obtain the methanol injection amount according to the state signal and the injection parameter, and provide feedback according to the methanol injection amount; The status signal includes a rail pressure and a scavenging pressure, and the injection parameter includes a pulse width value; the engine control module includes: a calculation unit and a calibration unit; the calculation unit calculates the methanol pressure based on the rail pressure, the scavenging pressure and the pulse width value; the calibration unit is connected to the calculation unit; the calibration unit is used to obtain the methanol injection amount by comparing the methanol pressure with the calibration amount.

2. The marine methanol engine injection control system according to claim 1, characterized in that: CAN communication is adopted among the engine control module, the drive control module and the signal module.

3. The marine methanol engine injection control system according to claim 1, characterized in that: Also includes: Security module; The security module is connected to the engine control module; the security module is used to obtain the working status of the engine and generate a running signal or a parking signal according to the working status; The engine control module is further configured to enter a working state capable of generating the drive enable signal according to the operating signal, or enter a cutoff state in which the generation of the drive enable signal is stopped according to the parking signal.

4. The marine methanol engine injection control system according to claim 1, characterized in that: The engine control module is an ECM board; the drive control module is an ICM board.

5. A method for controlling injection of a marine methanol engine, characterized in that: The method is performed by the marine methanol engine injection control system according to any one of claims 1 to 4, and comprises: The signal module sets methanol injection parameters; The engine control module generates a driving enable signal according to the injection parameter; The drive control module drives the injector of the engine to inject methanol into the cylinder according to the drive enable signal; The sensor module collects the state signal of the engine; the engine control module also obtains the methanol injection amount according to the state signal and the injection parameter, and provides feedback according to the methanol injection amount.

6. The marine methanol engine injection control method according to claim 5, characterized in that: The state signal includes rail pressure and scavenging pressure, and the injection parameter includes pulse width value; The engine control module includes: a calculation unit and a calibration unit; The method comprises: The calculation unit calculates the methanol pressure according to the rail pressure, the scavenging pressure and the pulse width value; The calibration unit obtains the methanol injection amount according to the methanol pressure comparison calibration amount.

7. The marine methanol engine injection control method according to claim 6, characterized in that: The marine methanol engine injection control system further includes: a security module; The method comprises: Before the engine control module generates a driving enable signal according to the injection parameter, the method further includes: The security module obtains the working status of the engine and generates a running signal or a stopping signal according to the working status; The engine control module enters a working state capable of generating the driving enable signal according to the operating signal, or enters a cut-off state in which the generation of the driving enable signal is stopped according to the parking signal.

8. A transport device, which is driven by methanol or hybrid power, characterized in that: The invention comprises the marine methanol engine injection control system according to any one of claims 1 to 4.

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