Methanol engine starting method and system and vehicle

Abstract

The embodiment of the invention discloses a methanol engine starting method and system and a vehicle. The method comprises the steps that the water temperature of an engine is obtained; if the water temperature is smaller than the water temperature threshold value, the low-temperature starting control function is set to be in an activated state; acquiring a methanol fuel pressure value of the engine; if the methanol fuel pressure value is larger than or equal to the pressure threshold value, a first command is sent out, and the first command is used for triggering the engine to conduct methanol fuel injection and ignition for starting. The engine is triggered to conduct methanol fuel injection and ignition operation according to the engine water temperature and the methanol fuel pressure value, so that it is guaranteed that the methanol fuel is in the high-pressure state in the cold starting process, and the problem that the methanol engine cannot be started in the low-temperature environment is solved.

Description

Technical Field

[0001] The present application relates to the technical field of methanol engines, and in particular to a method, system and vehicle for starting a methanol engine. Background Art

[0002] Methanol fuel has a high ignition temperature, high latent heat of vaporization, and low calorific value. Therefore, compared with gasoline engines, the temperature in the cylinder of a methanol engine decreases six times faster than that of a gasoline engine when the output is the same torque. At the same time, due to the low vapor pressure and poor evaporation characteristics of methanol fuel, low-temperature cold start is an important problem faced by methanol fuel engines.

[0003] At present, vehicles equipped with methanol engines are all started with gasoline, and when the water temperature exceeds a certain threshold, they switch to methanol operation. This requires methanol vehicles to match two fuel tanks, two injection systems, and two control logics, which increases manufacturing costs, R&D costs, and cumbersome ECU control logic. It also causes trouble for users to refill methanol fuel during use. Summary of the invention

[0004] The present application provides a methanol engine starting method, system and vehicle, so as to facilitate cold starting of the methanol engine under low temperature conditions.

[0005] This application provides the following solutions:

[0006] According to a first aspect, a method for starting a methanol engine is provided, the method comprising: obtaining a water temperature of the engine; if the water temperature is less than a water temperature threshold, setting a low-temperature start control function to be activated; obtaining a methanol fuel pressure value of the engine; if the methanol fuel pressure value is greater than or equal to a pressure threshold, issuing a first command, the first command being used to trigger the engine to perform methanol fuel injection and ignition for starting.

[0007] According to an achievable manner in the embodiment of the present application, the method further includes: if the water temperature is greater than or equal to a water temperature threshold, issuing the first command.

[0008] According to an achievable method in an embodiment of the present application, the method further includes: if the low-temperature start control function is in an activated state and the methanol fuel pressure value is less than a pressure threshold, performing a methanol fuel pressure establishment operation until the methanol fuel pressure value is greater than or equal to the pressure threshold.

[0009] According to an achievable method in an embodiment of the present application, the water temperature threshold is greater than or equal to -15°C and less than or equal to 0°C;

[0010] The pressure threshold is greater than or equal to 10 MPa and less than or equal to 20 MPa.

[0011] According to an achievable method in an embodiment of the present application, the method further includes: setting the methanol fuel injection mode and ignition mode of the engine according to the water temperature, so that the engine performs the methanol fuel injection and ignition processing according to the methanol fuel injection mode and ignition mode; the methanol fuel injection mode includes: one or more of the methanol fuel injection amount, the number of methanol fuel injections, and the methanol fuel injection start time; the ignition mode includes: one or more of the ignition angle, the number of ignitions, and the ignition start time.

[0012] According to an achievable method in an embodiment of the present application, after issuing the first command, it also includes: obtaining the engine speed; if the speed is less than the speed threshold, issuing a command to prohibit the engine methanol fuel injection, and setting the low temperature start control function to a prohibited state.

[0013] According to an achievable manner in the embodiment of the present application, the method further includes:

[0014] In response to the engine being in a state where methanol fuel injection is prohibited, the last issued first command is reset.

[0015] According to a second aspect, a starting system for a methanol engine is provided, the starting system comprising: a water temperature acquisition unit, configured to acquire the water temperature of the engine; a starting control unit, configured to set a low-temperature starting control function to an activated state if the water temperature is less than a water temperature threshold; a pressure acquisition unit, configured to acquire a methanol fuel pressure value of the engine; and a command sending unit, configured to issue a first command if the methanol fuel pressure value is greater than or equal to a pressure threshold, the first command being used to trigger the engine to perform methanol fuel injection and ignition for starting.

[0016] According to a third aspect, there is provided an electronic device, comprising:

[0017] one or more processors; and

[0018] A memory associated with the one or more processors, the memory being used to store program instructions, wherein the program instructions, when read and executed by the one or more processors, execute the steps of the method described in any one of the first aspects above.

[0019] According to a fourth aspect, a vehicle is provided, comprising a temperature detection device, a pressure detection device, a starting system as described in the second aspect above, and an engine;

[0020] The temperature detection device includes a water temperature sensor for detecting the water temperature of the engine;

[0021] The pressure detection device includes an engine rail pressure sensor for detecting the pressure value of methanol fuel;

[0022] The engine performs methanol fuel injection and ignition to start according to a first command issued by the starting system.

[0023] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0024] 1) This application activates the low-temperature start control function when the engine water temperature is less than the water temperature threshold, and triggers the engine to perform methanol fuel injection and ignition for start-up when the methanol fuel pressure value is greater than or equal to the pressure threshold. This application triggers the engine to perform methanol fuel injection and ignition operations based on the engine water temperature and the methanol fuel pressure value, thereby ensuring that the methanol fuel is in a high-pressure state during the cold start process, solving the problem that the methanol engine cannot start in a low-temperature environment.

[0025] Furthermore, the technical solution based on the present application only requires the use of a set of methanol fuel tanks, injection systems and control logic, and does not require the use of gasoline for starting, thereby reducing manufacturing costs and R&D costs, while also simplifying the control logic.

[0026] 2) When the engine water temperature is greater than or equal to the water temperature threshold, the present application directly triggers the engine to perform methanol fuel injection and ignition operations, thereby ensuring the normal starting of the methanol engine in a non-low temperature environment.

[0027] 3) When the methanol fuel pressure value is low, the present application performs a methanol fuel pressure building operation, so that the pressure value can meet the pressure requirement for cold start before performing methanol fuel injection and ignition. A control strategy for the starting method when the pressure value is low is provided, thereby improving the efficiency of engine starting.

[0028] 4) The present application sets the methanol fuel injection mode and ignition mode of the engine according to the water temperature, so that the fuel injection and ignition operations are more in line with the current temperature requirements, thereby improving the success rate and efficiency of engine starting.

[0029] 5) The present application stops the injection of methanol fuel when the engine speed is low, thereby protecting the fuel system and eliminating the impact of the current start on the next engine start.

[0030] Of course, any product implementing the present application does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A flowchart of a method for starting a methanol engine provided in an embodiment of the present application;

[0033] Figure 2 A logical diagram of a method for starting a methanol engine provided in an embodiment of the present application;

[0034] Figure 3 The test results of starting the methanol engine under low temperature conditions provided by the starting method of the embodiment of the present application;

[0035] Figure 4 A schematic block diagram of a methanol engine starting system provided in an embodiment of the present application;

[0036] Figure 5 A schematic block diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0038] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0039] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0040] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0041] There are already some technologies that can solve the cold start problem of methanol engines. These technologies use intake air heating, in-cylinder mixture heating, fuel heating, coolant heating, and increasing the compression ratio of the engine itself. These technologies are complex in research and development and manufacturing, which increases manufacturing costs.

[0042] In view of this, the present application provides a new idea. Figure 1 The flowchart of the methanol engine starting method provided in the embodiment of the present application can be executed by the methanol engine starting system, such as Figure 1 As shown in , the method may include the following steps:

[0043] Step 101, obtaining the water temperature of the engine;

[0044] Step 102, if the water temperature is less than the water temperature threshold, set the low temperature start control function to be activated;

[0045] Step 103, obtaining the methanol fuel pressure value of the engine;

[0046] Step 104: If the methanol fuel pressure value is greater than or equal to the pressure threshold, a first command is issued, and the first command is used to trigger the engine to perform methanol fuel injection and ignition for starting.

[0047] It can be seen from the above process that the present application activates the low-temperature start control function when the engine water temperature is less than the water temperature threshold, and triggers the engine to perform methanol fuel injection and ignition for start-up when the methanol fuel pressure value is greater than or equal to the pressure threshold. The present application triggers the engine to perform methanol fuel injection and ignition operations based on the engine water temperature and methanol fuel, thereby ensuring that the methanol fuel is in a high-pressure state during the cold start process, solving the problem that the methanol engine cannot be started in a low-temperature environment.

[0048] First, the above step 101, namely "obtaining the water temperature of the engine", is described in detail in conjunction with the embodiment.

[0049] The starting device provided by the present application responds to the instruction to start the engine and starts to execute the starting process provided by the embodiment of the present application. For example, the user turns the car key to the start position to trigger the instruction to start the engine. For another example, the user presses the start button of the car to trigger the instruction to start the engine. And so on.

[0050] This application is used for starting a methanol engine, which requires different starting strategies at different temperatures. The water temperature of the engine directly reflects the temperature state of the engine. The water temperature of the engine can be detected by a water temperature sensor, which converts the water temperature into an electrical signal and then sends it to the starting system of the methanol engine.

[0051] The methanol engine starting system of the present application can be implemented by an ECU (Electronic Control Unit), which is responsible for controlling and managing multiple systems of the vehicle to improve performance, efficiency and safety. In particular, the ECU is used to control the engine's ignition timing, fuel injection amount, air-fuel ratio, etc., to optimize the combustion process and improve fuel efficiency.

[0052] The above step 102, namely "if the water temperature is less than the water temperature threshold, setting the low temperature start control function to be activated" is described in detail below in conjunction with an embodiment.

[0053] The latent heat of evaporation of methanol fuel is relatively large, and the evaporation amount of methanol fuel is greatly affected by temperature. Therefore, if the external ambient temperature is low, the evaporation amount of methanol will be insufficient during combustion, and the concentration of combustible gas will not reach the ignition limit, which will cause difficulties in cold starting of the methanol engine. For methanol engines, the starting ability is weak in low temperature environments, especially below minus 15°C. This application needs to adopt different starting strategies at different temperatures. If the water temperature is low, it means that the engine needs to perform a low-temperature starting operation. At this time, the low-temperature starting control function is activated to control the low-temperature starting.

[0054] Specifically, the water temperature threshold is set to determine whether to perform low temperature start. If the water temperature is less than the water temperature threshold, the low temperature start control function is set to be activated. The water temperature threshold value range may be [-15°C, 0°C], preferably -15°C.

[0055] Among them, the low-temperature start control function is a series of complex control strategies to ensure that the engine can start smoothly under low-temperature conditions and quickly enter a normal working state. In this application, if the water temperature is less than the water temperature threshold, the low-temperature cold start control function is activated. Only when the low-temperature cold start control function is in an activated state can the control logic of methanol fuel injection based on methanol fuel pressure be allowed, and the corresponding control strategy is in an executable state. If the low-temperature cold start control function is in a prohibited state, the control logic of methanol fuel injection based on methanol fuel pressure is not allowed, that is, subsequent steps 103 to 104 are not executed.

[0056] In the present application, if the water temperature is greater than or equal to the water temperature threshold, it means that the engine is in a non-cold start state, and the first command can directly trigger the engine to inject methanol fuel and ignite to start. The first command is used to trigger the engine to inject methanol fuel and ignite to start.

[0057] Methanol fuel injection and ignition are key links in the engine starting process. Methanol fuel is transported from the fuel tank to the injector through a high-pressure fuel pump. The injector atomizes methanol into fine droplets to improve its mixing efficiency with air. The atomized methanol is mixed with air in the intake duct or cylinder to form a proper air-fuel ratio for ignition and combustion. The spark plug generates sparks under the action of high voltage electricity to ignite the mixture. After the mixture is ignited, the high-temperature and high-pressure gas generated by the combustion pushes the piston to move, thereby starting the engine.

[0058] The above step 103, namely "obtaining the methanol fuel pressure value of the engine", is described in detail below in conjunction with an embodiment.

[0059] If the water temperature is less than the water temperature threshold, the methanol fuel pressure value of the engine is further determined. The methanol fuel pressure value is the pressure value generated by the methanol fuel in the methanol fuel injection rail. The pressure of the methanol fuel can be measured and monitored in real time by installing a pressure sensor at the output end of the fuel pump or the input end of the injector. The methanol engine start system can receive the data of the methanol fuel pressure in real time by connecting to the pressure sensor.

[0060] The above step 104, namely "if the methanol fuel pressure value is greater than or equal to the pressure threshold, issuing a first command, the first command being used to trigger the engine to perform methanol fuel injection and ignition for starting" is described in detail below in conjunction with an embodiment.

[0061] During the start-up process of the methanol engine, the engine needs a stable fuel supply to ensure a smooth start. During the cold start process, a higher methanol fuel pressure needs to be reached to achieve a cold start. The present application sets a pressure threshold to judge the methanol fuel pressure value. The pressure threshold is to ensure that the engine can start and run normally under low temperature conditions. The value range of the pressure threshold can be [10 MPa, 20 MPa], preferably 10 MPa.

[0062] Figure 2 A logical diagram of a method for starting a methanol engine provided in an embodiment of the present application is shown in FIG. Figure 2 When the low-temperature start control function is activated, if the methanol fuel pressure value is greater than or equal to the pressure threshold, it means that the methanol fuel pressure value meets the low-temperature start requirement, and a first command is issued to trigger the engine to inject methanol fuel and ignite for start.

[0063] When the low temperature start control function is activated, but the methanol fuel pressure value is less than or equal to the pressure threshold, it means that the methanol fuel pressure value does not meet the start requirements and cannot support the start requirements. In this case, the methanol engine's starting system will issue a command to prohibit fuel injection to prevent fuel injection into the engine's combustion chamber, because insufficient methanol fuel pressure may cause uneven fuel injection and affect the normal operation of the engine. At the same time, the methanol engine's starting system will continue to monitor the fuel rail pressure until the pressure reaches the set threshold. During this process, the fuel pump may take longer to build up the required pressure.

[0064] During the startup process of this application, there are also certain requirements for the engine speed. At low speeds, if too much methanol is injected, it may cause incomplete combustion of the engine, thereby increasing the risk of flameout; if the engine uses methanol at low speeds, it may cause thermal shock or thermal stress to certain parts of the engine, thereby damaging the engine.

[0065] The methanol engine start system can obtain the real-time speed information of the engine by receiving the signal from the speed sensor installed on the engine. If the speed is less than the speed threshold, a command to prohibit the engine methanol fuel injection is issued, and the low temperature start control function is set to a prohibited state.

[0066] Specifically, at this time, in response to the engine being in a state where methanol fuel injection is prohibited, the engine start system resets the first command issued last time, thereby eliminating the impact of this start on the next engine start. When the next command to start the engine is received, the cold start process provided by the embodiment of the present application is executed again.

[0067] In this application, when the engine is started, a methanol fuel injection mode and an ignition mode are set for it, and the engine performs methanol fuel injection and ignition processing according to the methanol fuel injection mode and the ignition mode. The injection mode and the ignition mode are two sets of parameters in the engine starting process, which together ensure that the engine can run efficiently and stably.

[0068] The methanol fuel injection mode includes one or more of the methanol fuel injection amount, the number of methanol fuel injections, and the methanol fuel injection start time; the ignition mode includes one or more of the ignition angle, the number of ignitions, and the ignition start time.

[0069] The parameter values ​​in the methanol fuel injection mode and ignition mode can be determined according to the water temperature, that is, different parameter values ​​are used to perform methanol fuel injection and ignition processing under different temperature conditions. For example, when the water temperature is low, the fuel injection amount is increased to provide a richer mixture; the number of injections is increased to ensure that the fuel can be fully atomized and mixed with the air; the ignition start time is advanced to adapt to the combustion characteristics of methanol at low temperatures.

[0070] Multiple setting values ​​can be set in advance for the methanol fuel injection mode and the ignition mode, respectively, and each setting value corresponds to a set of parameter values ​​in the mode. A setting value in the methanol fuel injection mode corresponds to the numerical value of a set of parameters in the mode (such as the methanol fuel injection amount, the number of methanol fuel injections, and the methanol fuel injection start time). A setting value in the ignition mode corresponds to the numerical value of a set of parameters in the mode (such as the ignition angle, the number of ignitions, and the ignition start time).

[0071] For example, Figure 3 During low temperature starting, the numerical value of the parameter in the methanol fuel injection mode is preset to the parameter value corresponding to "setting value 1", and the numerical value of the parameter in the ignition mode is preset to the parameter value corresponding to "setting value 2".

[0072] The methanol fuel injection mode and ignition mode can also be determined in combination with other parameters such as engine air flow, throttle position, load, speed, etc. For example, the best injection time is calculated based on the engine's operating status and temperature to ensure that the methanol fuel is mixed with the air in the engine cylinder; the engine load, speed, etc. are referenced when determining the amount of methanol fuel injection.

[0073] The present application also provides a vehicle, including a temperature detection device, a pressure detection device, a methanol engine starting system as provided in the embodiment of the present application, and a generator. The temperature detection device includes a water temperature sensor for detecting the water temperature of the engine; the pressure detection device includes an engine rail pressure sensor for detecting the pressure value of methanol fuel; the engine performs methanol fuel injection and ignition according to a first command issued by the starting device to start.

[0074] This application uses a vehicle equipped with a methanol engine and applies the methanol engine starting method provided in this application to conduct a starting test under low temperature conditions. The experimental results are as follows: Figure 3 shown. Figure 3 In the equation, the horizontal axis is time and the vertical axis is engine speed. Figure 3 It can be seen that the engine speed is stabilized in the range of 600 to 1050 revolutions per minute (RPM) in a relatively short period of time, and it can be considered that the engine is started successfully with high starting efficiency.

[0075] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0076] According to an embodiment of another aspect, a starting system for a methanol engine is provided. Figure 4 A schematic block diagram of a methanol engine starting system according to an embodiment is shown. Figure 4 As shown, the device 400 includes: a water temperature acquisition unit 401, a start control unit 402, a pressure acquisition unit 403 and a command sending unit 404, and may further include a methanol fuel pressure establishment unit 405 and a mode setting unit 406. The main functions of each component unit are as follows:

[0077] The water temperature acquisition unit 401 is configured to acquire the water temperature of the engine.

[0078] The start control unit 402 is configured to set the low temperature start control function to be in an activated state if the water temperature is less than a water temperature threshold.

[0079] The pressure acquisition unit 403 is configured to acquire the methanol fuel pressure value of the engine.

[0080] The command sending unit 404 is configured to issue a first command if the methanol fuel pressure value is greater than or equal to a pressure threshold, wherein the first command is used to trigger the engine to perform methanol fuel injection and ignition for starting.

[0081] As one achievable manner, the command sending unit 404 may be further configured to issue the first command if the water temperature is greater than or equal to a water temperature threshold.

[0082] As one of the achievable methods, the methanol fuel pressure establishing unit 405 can be configured to execute the methanol fuel pressure establishing operation if the low temperature start control function is activated and the methanol fuel pressure value is less than or equal to the pressure threshold, until the methanol fuel pressure value is greater than the pressure threshold.

[0083] Among them, the water temperature threshold is greater than or equal to -15°C and less than or equal to 0°C; the pressure threshold is greater than or equal to 10 MPa and less than or equal to 20 MPa.

[0084] As one of the feasible ways, the mode setting unit 406 can be configured to determine the methanol fuel injection mode and ignition mode of the engine according to the water temperature, so that the engine can perform the methanol fuel injection and ignition processing according to the methanol fuel injection mode and the ignition mode; the methanol fuel injection mode includes: one or more of the methanol fuel injection amount, the number of methanol fuel injections, and the methanol fuel injection start time; the ignition mode includes: one or more of the ignition angle, the number of ignitions, and the ignition start time.

[0085] As one of the achievable ways, after issuing the first command, the command sending unit 404 is further configured to: obtain the engine speed; if the speed is less than the speed threshold, issue a command to prohibit the engine methanol fuel injection. The start control unit 402 is further configured to: if the speed is less than the speed threshold, set the low temperature start control function to be in a prohibited state.

[0086] Furthermore, the command sending unit 404 may also be configured to: in response to the engine being in a state where methanol fuel injection is prohibited, reset the first command issued last time.

[0087] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. The device embodiment described above is only schematic, wherein the unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or it may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative work.

[0088] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0089] In addition, an embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the steps of any one of the methods in the aforementioned method embodiments are implemented.

[0090] And an electronic device, comprising:

[0091] one or more processors; and

[0092] A memory associated with the one or more processors, the memory being used to store program instructions, wherein the program instructions, when read and executed by the one or more processors, execute the steps of the method described in any one of the aforementioned method embodiments.

[0093] The present application also provides a computer program product, including a computer program, which implements the steps of any one of the methods in the aforementioned method embodiments when executed by a processor.

[0094] in, Figure 5 The architecture of the electronic device is shown as an example, which may include a processor 510, a video display adapter 511, a disk drive 512, an input / output interface 513, a network interface 514, and a memory 520. The processor 510, the video display adapter 511, the disk drive 512, the input / output interface 513, the network interface 514, and the memory 520 may be communicatively connected via a communication bus 530.

[0095] The processor 510 may be implemented by a general-purpose CPU, a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, etc., and is used to execute relevant programs to implement the technical solutions provided in this application.

[0096] The memory 520 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 520 can store an operating system 521 for controlling the operation of the electronic device 500, and a basic input and output system (BIOS) 522 for controlling the low-level operation of the electronic device 500. In addition, a web browser 523, a data storage management system 524, and a methanol engine starting system 525, etc. can also be stored. The above-mentioned methanol engine starting system 525 can be an application program that specifically implements the operations of the aforementioned steps in the embodiment of the present application. In short, when the technical solution provided by the present application is implemented by software or firmware, the relevant program code is stored in the memory 520 and is called and executed by the processor 510.

[0097] The input / output interface 513 is used to connect the input / output module to realize information input and output. The input / output module can be configured in the device as a component (not shown in the figure), or it can be externally connected to the device to provide corresponding functions. The input device may include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output device may include a display, a speaker, a vibrator, an indicator light, etc.

[0098] The network interface 514 is used to connect to a communication module (not shown) to realize communication interaction between the device and other devices. The communication module can realize communication through a wired mode (such as USB, network cable, etc.) or a wireless mode (such as mobile network, WIFI, Bluetooth, etc.).

[0099] The bus 530 comprises a pathway for transmitting information between the various components of the device (eg, the processor 510, the video display adapter 511, the disk drive 512, the input / output interface 513, the network interface 514, and the memory 520).

[0100] It should be noted that, although the above device only shows a processor 510, a video display adapter 511, a disk drive 512, an input / output interface 513, a network interface 514, a memory 520, a bus 530, etc., in the specific implementation process, the device may also include other components necessary for normal operation. In addition, it can be understood by those skilled in the art that the above device may also only include components necessary for implementing the solution of the present application, and does not necessarily include all the components shown in the figure.

[0101] It can be known from the description of the above implementation methods that those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be essentially or partly contributed to the prior art in the form of a computer program product, which can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present application or certain parts of the embodiments.

[0102] The technical solution provided by the present application is described in detail above. The principle and implementation method of the present application are described in detail using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A method for starting a methanol engine, characterized in that: The method comprises: obtaining the water temperature of the engine; If the water temperature is lower than the water temperature threshold, the low temperature start control function is set to be activated; Obtaining a methanol fuel pressure value of the engine; If the methanol fuel pressure value is greater than or equal to the pressure threshold, a first command is issued, wherein the first command is used to trigger the engine to perform methanol fuel injection and ignition for starting.

2. The method according to claim 1, further comprising: If the water temperature is greater than or equal to the water temperature threshold, the first command is issued.

3. The method according to claim 1, characterized in that The method further comprises: If the low temperature start control function is in an activated state and the methanol fuel pressure value is less than a pressure threshold, a methanol fuel pressure building operation is performed until the methanol fuel pressure value is greater than or equal to the pressure threshold.

4. The method according to claim 1, characterized in that The water temperature threshold is greater than or equal to -15°C and less than or equal to 0°C; The pressure threshold is greater than or equal to 10 MPa and less than or equal to 20 MPa.

5. The method according to any one of claims 1 to 4, characterized in that: The method further comprises: According to the water temperature, setting the methanol fuel injection mode and ignition mode of the engine, so that the engine performs the methanol fuel injection and ignition processing according to the methanol fuel injection mode and ignition mode; The methanol fuel injection mode includes: one or more of: methanol fuel injection amount, methanol fuel injection times, and methanol fuel injection start time; The ignition mode includes: one or more of an ignition angle, an ignition number, and an ignition start time.

6. The method according to any one of claims 1 to 4, characterized in that: After issuing the first command, the method further includes: Get engine speed; If the rotation speed is less than the rotation speed threshold, a command is issued to prohibit the engine methanol fuel injection, and the low temperature start control function is set to a prohibited state.

7. The method according to claim 6, characterized in that The method further comprises: In response to the engine being in a state where methanol fuel injection is prohibited, the last issued first command is reset.

8. A methanol engine starting system, characterized in that: The starting system comprises: a water temperature acquisition unit, configured to acquire the water temperature of the engine; a start control unit configured to set a low temperature start control function to be in an activated state if the water temperature is less than a water temperature threshold; A pressure acquisition unit, configured to acquire a methanol fuel pressure value of the engine; The command sending unit is configured to issue a first command if the methanol fuel pressure value is greater than or equal to a pressure threshold, wherein the first command is used to trigger the engine to perform methanol fuel injection and ignition for starting.

9. An electronic device, characterized in that: include: one or more processors; as well as A memory associated with the one or more processors, the memory being used to store program instructions, wherein the program instructions, when read and executed by the one or more processors, execute the steps of the method described in any one of claims 1 to 7.

10. A vehicle, characterized in that: comprising a temperature detection device, a pressure detection device, a starting system as claimed in claim 8, and an engine; The temperature detection device includes a water temperature sensor for detecting the water temperature of the engine; The pressure detection device includes an engine rail pressure sensor for detecting the pressure value of methanol fuel; The engine performs methanol fuel injection and ignition to start according to a first command issued by the starting system.

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