Methanol engine cold start method and related device

Abstract

The invention discloses a methanol engine cold start method and a related device, and relates to the technical field of methanol engines, and the methanol engine cold start method comprises the following steps: controlling a fuel heater to heat air in a first channel and cooling liquid in a second channel under the condition that the environment temperature is smaller than a first temperature threshold value, the temperature of cooling liquid of the methanol engine cooling system is monitored, when the temperature of the cooling liquid reaches a second temperature threshold value, the methanol engine is started based on methanol fuel injected by the methanol injector, and if the air inlet temperature of the air inlet pipe assembly reaches a third temperature threshold value and the temperature of the cooling liquid does not reach the second temperature threshold value, the methanol engine is started. And the three-way solenoid valve is controlled to communicate with the second outlet. The air and the cooling liquid are heated at the same time through the fuel heater, the engine cooling liquid and the air inlet pipe assembly are heated at the same time in the low-temperature environment, the environment temperature around the nozzle of the methanol ejector can be rapidly increased, cold starting of the methanol engine is achieved, and the cold starting efficiency of the methanol engine is improved.

Description

Technical Field

[0001] The present application relates to the technical field of methanol engines, and in particular to a methanol engine cold start method and related devices. Background Art

[0002] Due to the characteristics of methanol fuel that it is difficult to evaporate and has a large latent heat of vaporization, methanol fuel is difficult to evaporate in a low temperature environment, resulting in methanol engines that use methanol as fuel having difficulty in cold starting because methanol fuel cannot combine with air to form a combustible mixture. Summary of the invention

[0003] In view of the above problems, the present application provides a methanol engine cold start method and related devices to achieve the purpose of methanol engine cold start. The specific scheme is as follows:

[0004] A first aspect of the present application provides a methanol engine cold start method, comprising:

[0005] When the ambient temperature is less than a first temperature threshold, controlling the fuel heater to heat the air in the first channel and the coolant in the second channel, wherein the first channel allows the heated air to heat the intake pipe assembly, and the second channel allows the coolant from the methanol engine cooling system to be heated and then returned to the methanol engine cooling system;

[0006] Monitoring the coolant temperature of the methanol engine cooling system;

[0007] When the coolant temperature reaches a second temperature threshold, starting the methanol engine based on the methanol fuel injected by the methanol injector, wherein the second temperature threshold is a temperature threshold for causing the methanol fuel to atomize and evaporate;

[0008] monitoring the intake air temperature of the intake pipe assembly;

[0009] If the intake air temperature reaches the third temperature threshold and the coolant temperature does not reach the second temperature threshold, the three-way solenoid valve is controlled to switch from connecting to the first outlet to connecting to the second outlet, wherein the three-way solenoid valve is arranged in the first channel and is located between the fuel heater and the intake pipe assembly, when the first outlet is connected, the heated air heats the intake pipe assembly, and when the second outlet is connected, the heated air is discharged into the atmosphere.

[0010] In a possible implementation, the first channel is an air intake sleeve that wraps the air intake pipe assembly, and fins are arranged inside the air intake sleeve.

[0011] In a possible implementation, the method further includes:

[0012] When the coolant temperature reaches the second temperature threshold, the fuel heater is controlled to stop operating.

[0013] In a possible implementation, monitoring the intake air temperature of the intake pipe assembly includes:

[0014] The intake air temperature is collected in real time by an intake air temperature sensor arranged in the intake pipe assembly.

[0015] In a possible implementation, when the first outlet is connected, the heated air also heats a breathing system, wherein the breathing system includes a cylinder head cover, a crankcase, and an oil-gas separator.

[0016] A second aspect of the present application provides a methanol engine cold start device, comprising:

[0017] a heating module, for controlling the fuel heater to heat the air in the first channel and the coolant in the second channel when the ambient temperature is less than a first temperature threshold, wherein the first channel enables the heated air to heat the intake pipe assembly, and the second channel enables the coolant from the methanol engine cooling system to be heated and then returned to the methanol engine cooling system;

[0018] A temperature monitoring module, used to monitor the coolant temperature of the methanol engine cooling system;

[0019] a cold start module, configured to start the methanol engine based on the methanol fuel injected by the methanol injector when the temperature of the coolant reaches a second temperature threshold, wherein the second temperature threshold is a temperature threshold for causing the methanol fuel to atomize and evaporate;

[0020] The temperature monitoring module is also used to monitor the intake air temperature of the intake pipe assembly;

[0021] A solenoid valve control module is used to control the three-way solenoid valve to switch from connecting to the first outlet to connecting to the second outlet if the intake air temperature reaches a third temperature threshold and the coolant temperature does not reach the second temperature threshold, wherein the three-way solenoid valve is arranged in the first channel and is located between the fuel heater and the intake pipe assembly, when the first outlet is connected, the heated air heats the intake pipe assembly, and when the second outlet is connected, the heated air is discharged into the atmosphere.

[0022] A third aspect of the present application provides a computer program product, comprising computer-readable instructions, which, when executed on an electronic device, enables the electronic device to implement the methanol engine cold start method of the first aspect or any implementation of the first aspect.

[0023] A fourth aspect of the present application provides an electronic device, comprising at least one processor and a memory connected to the processor, wherein:

[0024] The memory is used to store computer programs;

[0025] The processor is used to execute the computer program so that the electronic device can implement the methanol engine cold start method of the first aspect or any implementation of the first aspect.

[0026] The fifth aspect of the present application provides a computer storage medium, which carries one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement the methanol engine cold start method of the above-mentioned first aspect or any implementation method of the first aspect.

[0027] By means of the above technical scheme, the cold start method of the methanol engine provided by the present application, when the ambient temperature is less than the first temperature threshold, controls the fuel heater to heat the air in the first channel and the coolant in the second channel, monitors the coolant temperature of the cooling system of the methanol engine, and when the coolant temperature reaches the second temperature threshold, starts the methanol engine based on the methanol fuel injected by the methanol injector, monitors the intake temperature of the intake pipe assembly, and if the intake temperature reaches the third temperature threshold and the coolant temperature does not reach the second temperature threshold, controls the three-way solenoid valve to switch from connecting the first outlet to connecting the second outlet. It can be seen that the present application heats the air and the coolant at the same time through the fuel heater, realizes the simultaneous heating of the engine coolant and the intake pipe assembly in a low temperature environment, can quickly increase the ambient temperature around the methanol injector nozzle, and then the methanol fuel injected by the methanol injector can be quickly atomized and evaporated, which not only realizes the cold start of the methanol engine, but also improves the efficiency of the cold start of the methanol engine. At the same time, when the intake temperature of the intake pipe assembly reaches the third temperature threshold but the coolant temperature does not reach the second temperature threshold, the present application controls the three-way solenoid valve to connect the second outlet, allowing the hot air to pass into the atmosphere, thereby avoiding damage to components such as sensors and actuators and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the originals and elements are not necessarily drawn to scale.

[0029] Figure 1 A schematic diagram of a system architecture provided for this application;

[0030] Figure 2A schematic diagram of an optional hardware structure of the terminal 100 provided in this application;

[0031] Figure 3 A schematic diagram of the structure of a server 200 provided in this application;

[0032] Figure 4 A schematic diagram of a methanol engine cold start method provided in this application;

[0033] Figure 5 A schematic diagram of a cross section of an intake pipe assembly and an intake air sleeve;

[0034] Figure 6 A schematic diagram of the structure of a methanol engine cold start system provided in this application;

[0035] Figure 7 A schematic diagram of the structure of another methanol engine cold start system provided in this application;

[0036] Figure 8 A schematic diagram of the structure of a methanol engine cold start device provided in this application;

[0037] Fig. 9 A schematic diagram of the structure of an electronic device provided in this application. DETAILED DESCRIPTION

[0038] The following describes the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. The terms used in the implementation method section of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

[0039] The embodiments of the present application are described below in conjunction with the accompanying drawings. Those skilled in the art will appreciate that, with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0040] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and need not be used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, which is only to describe the distinction mode adopted by the objects of the same attributes when describing in the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0041] See also Figure 1 , Figure 1A schematic diagram of a system architecture is shown. The system may include a terminal 100 and a server 200. The server 200 may include one or more servers ( Figure 1 In the example, a server is included, and the server 200 can provide the method provided in the embodiment of the present application for one or more terminals.

[0042] Among them, an application can be installed on the terminal 100, and the above application and web page can provide an interface. The terminal 100 can receive relevant parameters entered by the user on the interface and send the above parameters to the server 200. The server 200 can obtain processing results based on the received parameters and return the processing results to the terminal 100.

[0043] It should be understood that in some optional implementations, the terminal 100 can also complete the action of obtaining the processing result based on the received parameters by itself without the cooperation of the server, and the embodiments of the present application are not limited to this.

[0044] Next describe Figure 1 The product form of the mid-terminal 100;

[0045] The terminal 100 in the embodiment of the present application can be a mobile phone, a tablet computer, a wearable device, a vehicle-mounted device, an augmented reality (AR) / virtual reality (VR) device, a laptop computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), etc., and the embodiment of the present application does not impose any restrictions on this.

[0046] Figure 2 An optional hardware structure diagram of the terminal 100 is shown.

[0047] refer to Figure 2 As shown, the terminal 100 may include a radio frequency unit 110, a memory 120, an input unit 130, a display unit 140, a camera 150 (optional), an audio circuit 160 (optional), a speaker 161 (optional), a microphone 162 (optional), an earphone jack 163 (optional), a processor 170, an external interface 180, a power supply 190 and other components. Those skilled in the art will appreciate that Figure 2 These are merely examples of terminals or multi-function devices and do not constitute limitations on the terminals or multi-function devices, which may include more or fewer components than those shown in the figures, or combinations of certain components, or different components.

[0048] The input unit 130 can be used to receive input digital or character information, and generate key signal input related to the user settings and function control of the portable multifunctional device. Specifically, the input unit 130 may include a touch screen 131 (optional) and / or other input devices 132. The touch screen 131 can collect the user's touch operations on or near it (such as the user's operation on or near the touch screen using any suitable object such as fingers, joints, stylus, etc.), and drive the corresponding connection device according to a pre-set program. The touch screen can detect the user's touch action on the touch screen, convert the touch action into a touch signal and send it to the processor 170, and can receive and execute the command sent by the processor 170; the touch signal at least includes the touch point coordinate information. The touch screen 131 can provide an input interface and an output interface between the terminal 100 and the user. In addition, the touch screen can be implemented using multiple types such as resistive, capacitive, infrared and surface acoustic wave. In addition to the touch screen 131, the input unit 130 can also include other input devices. Specifically, other input devices 132 may include, but are not limited to, one or more of a physical keyboard, function keys (such as a volume control key, a switch key, etc.), a trackball, a mouse, a joystick, and the like.

[0049] Among them, the input device 132 can receive input data and the like.

[0050] The display unit 140 may be used to display information input by a user or provided to a user, various menus of the terminal 100, an interactive interface, file display, and / or playback of any multimedia file.

[0051] The memory 120 can be used to store instructions and data. The memory 120 can mainly include an instruction storage area and a data storage area. The data storage area can store various data, such as multimedia files, texts, etc.; the instruction storage area can store software units such as operating systems, applications, instructions required for at least one function, or their subsets and extensions. It can also include a non-volatile random access memory; provide the processor 170 with hardware, software and data resources including management of computing and processing equipment, and support control software and applications. It is also used for the storage of multimedia files, and the storage of running programs and applications.

[0052] The processor 170 is the control center of the terminal 100. It uses various interfaces and lines to connect various parts of the entire terminal 100. By running or executing instructions stored in the memory 120 and calling data stored in the memory 120, it executes various functions of the terminal 100 and processes data, thereby controlling the terminal device as a whole. Optionally, the processor 170 may include one or more processing units; preferably, the processor 170 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface and application program, and the modem processor mainly processes wireless communication. It is understandable that the above-mentioned modem processor may not be integrated into the processor 170. In some embodiments, the processor and the memory may be implemented on a single chip, and in some embodiments, they may also be implemented separately on separate chips. The processor 170 may also be used to generate corresponding operation control signals, send them to corresponding components of the computing and processing device, read and process data in the software, especially read and process data and programs in the memory 120, so that each functional module therein performs corresponding functions, thereby controlling the corresponding components to act according to the requirements of the instructions.

[0053] Among them, the memory 120 can be used to store software codes related to the methanol engine cold start method, the processor 170 can execute the steps of the methanol engine cold start method, and can also schedule other units (such as the above-mentioned input unit 130 and display unit 140) to achieve corresponding functions.

[0054] The radio frequency unit 110 (optional) can be used for receiving and sending information or receiving and sending signals during a call, for example, after receiving the downlink information of the base station, it is sent to the processor 170 for processing; in addition, the designed uplink data is sent to the base station. Generally, the RF circuit includes but is not limited to an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier (Low Noise Amplifier, LNA), a duplexer, etc. In addition, the radio frequency unit 110 can also communicate with network devices and other devices through wireless communication. The wireless communication can use any communication standard or protocol, including but not limited to Global System of Mobile Communication (Global System of Mobile Communication, GSM), General Packet Radio Service (General Packet Radio Service, GPRS), Code Division Multiple Access (Code Division Multiple Access, CDMA), Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA), Long Term Evolution (Long Term Evolution, LTE), email, Short Messaging Service (SMS), etc.

[0055] In this embodiment of the present application, the RF unit 110 can send data to the server 200 and receive processing results sent by the server 200.

[0056] It should be understood that the radio frequency unit 110 is optional and can be replaced by other communication interfaces, such as a network port.

[0057] The terminal 100 also includes a power supply 190 (such as a battery) for supplying power to various components. Preferably, the power supply can be logically connected to the processor 170 through a power management system, so that the power management system can manage functions such as charging, discharging, and power consumption.

[0058] The terminal 100 further includes an external interface 180 , which may be a standard Micro USB interface or a multi-pin connector, and may be used to connect the terminal 100 to communicate with other devices, or to connect a charger to charge the terminal 100 .

[0059] Although not shown, the terminal 100 may also include a flashlight, a wireless fidelity (WiFi) module, a Bluetooth module, sensors with different functions, etc., which are not described in detail here. Some or all of the methods described below may be applied in the following embodiments. Figure 2 In the terminal 100 shown.

[0060] Next describe Figure 1 The product form of the server 200;

[0061] Figure 3 A structural diagram of a server 200 is provided, such as Figure 3 As shown, the server 200 includes a bus 201, a processor 202, a communication interface 203, and a memory 204. The processor 202, the memory 204, and the communication interface 203 communicate with each other via the bus 201.

[0062] The bus 201 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 3 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0063] The processor 202 may be any one or more of a central processing unit (CPU), a graphics processing unit (GPU), a microprocessor (MP), or a digital signal processor (DSP).

[0064] The memory 204 may include a volatile memory, such as a random access memory (RAM). The memory 204 may also include a non-volatile memory, such as a read-only memory (ROM), a flash memory, a hard disk drive (HDD), or a solid state drive (SSD).

[0065] The memory 204 may be used to store software codes related to the methanol engine cold start method, the processor 202 may execute the steps of the methanol engine cold start method of the chip, and may also schedule other units to implement corresponding functions.

[0066] It should be understood that the above-mentioned terminal 100 and server 200 can be centralized or distributed devices, and the processors in the above-mentioned terminal 100 and server 200 (such as processor 170 and processor 202) can be hardware circuits (such as application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), general-purpose processors, DSPs, microprocessors or microcontrollers, etc.), or a combination of these hardware circuits. For example, the processor can be a hardware system with an instruction execution function, such as a CPU, DSP, etc., or a hardware system without an instruction execution function, such as an ASIC, FPGA, etc., or a combination of the above-mentioned hardware systems without an instruction execution function and hardware systems with an instruction execution function.

[0067] In order to enable those skilled in the art to better understand the present application, the relevant terms used in the present application are explained below.

[0068] Fuel heater: It consists of a main motor, a plunger oil pump, a combustion-supporting fan, etc. When working, the main motor drives the plunger oil pump, the combustion-supporting fan and the atomizer to rotate. The oil pump sends the sucked fuel to the atomizer through the oil pipeline. The atomizer atomizes the fuel through the centrifugal force and mixes it with the air sucked by the combustion-supporting fan in the main combustion chamber. It is ignited by the hot electric glow plug and returns after being fully burned in the post-combustion chamber. The heat is transferred to the medium in the water jacket interlayer through the inner wall of the water jacket and the heat sink above. The heated medium circulates in the entire piping system under the action of the circulating water pump (or thermal convection) to achieve the purpose of heating.

[0069] The present application provides a methanol engine cold start method. Optionally, the methanol engine cold start method can be applied to an engine control unit.

[0070] The methanol engine cold start method according to an embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0071] Reference Figure 4 , Figure 4 A schematic flow chart of a methanol engine cold start method provided in an embodiment of the present application, the method may include:

[0072] Step S401: When the ambient temperature is less than a first temperature threshold, control the fuel heater to heat the air in the first channel and the coolant in the second channel, wherein the first channel allows the heated air to heat the intake pipe assembly, and the second channel allows the coolant from the methanol engine cooling system to be heated and then returned to the methanol engine cooling system.

[0073] Here, the first temperature threshold is the temperature at which the methanol fuel cannot evaporate. Preferably, the first temperature threshold is the lowest temperature at which the methanol fuel atomizes and evaporates. Relevant research results show that when the ambient temperature is lower than 16°C, the methanol fuel does not evaporate. Therefore, optionally, the first temperature threshold can be 16°C.

[0074] When the ambient temperature is less than the first temperature threshold, the methanol fuel cannot evaporate, and the methanol engine is in a cold start environment. In order to successfully start the methanol engine in a cold start environment, it is necessary to increase the ambient temperature around the methanol injector nozzle, that is, to increase the ambient temperature around the methanol engine.

[0075] In order to achieve the above purpose, the inventor of this case conducted in-depth research and thought that the intake pipe assembly of the methanol engine can be heated. However, if the air in the intake pipe assembly is directly heated, the structure of the intake pipe assembly needs to be adjusted, which is a large change and high cost. In order to heat the intake pipe assembly at a low cost with as little improvement as possible, the inventor of this case further thought that an air duct connected to the fuel heater can be set around the intake pipe assembly. For the convenience of subsequent introduction, the air duct is defined as a first channel. The first channel can absorb air from the atmosphere and heat it through the fuel heater. When the heated air flows around the intake pipe assembly in the first channel, the intake pipe assembly is heated again.

[0076] In a possible implementation, in order to heat the intake pipe assembly more quickly, the first passage may be an intake air jacket that wraps the intake pipe assembly.

[0077] See also Figure 5 As shown in FIG. , it is a schematic diagram of a cross section of an intake pipe assembly and an intake air sleeve. Figure 5 The air intake sleeve 520 completely wraps the air intake pipe assembly 510. This wrapping method allows the hot air in the air intake sleeve 520 to heat the air intake pipe assembly 510 more quickly.

[0078] Optional, such as Figure 5 The air intake sleeve 520 may be provided with fins 521 inside, and the fins 521 may increase the heat exchange area with the hot air (ie, the “heated air” mentioned above), thereby further improving the heating efficiency of the air intake pipe assembly 510 .

[0079] It should be noted that Figure 5 The structure shown is only an example and is not intended to limit the present application.

[0080] Compared with liquids, air is easier to heat up quickly through heating, so the ambient temperature around the methanol engine can be quickly increased, which can solve the cold start problem of the methanol engine to a certain extent. However, the single air heating method has limited ability to increase the ambient temperature around the methanol engine. Even if the air is heated to a very high temperature, it may not be enough to atomize and evaporate the methanol fuel. Therefore, other means are needed to further increase the ambient temperature around the methanol engine.

[0081] In a low-cost implementation scheme, the inventor of this case has thought of heating the coolant in the methanol engine cooling system. To this end, this embodiment provides a second channel connected to the fuel heater. The second channel can draw coolant from the methanol engine cooling system. After being heated by the fuel heater, the heated coolant returns to the methanol engine cooling system.

[0082] Heating the coolant can directly and quickly increase the ambient temperature around the methanol engine. In addition, by providing the first channel and the second channel, the fuel heater can heat the air and the coolant at the same time, which can maximize the use of the energy of the fuel heater, thereby improving the energy utilization rate of the fuel heater and quickly increasing the ambient temperature around the methanol engine.

[0083] Step S402: monitor the coolant temperature of the methanol engine cooling system.

[0084] As described above, although both the air heating method and the coolant heating method can increase the ambient temperature around the methanol engine, the atomization and evaporation of methanol fuel mainly depends on the coolant heating method. Therefore, this embodiment requires real-time monitoring of the coolant temperature to determine the start-up timing of the methanol engine.

[0085] Optionally, the coolant temperature can be collected in real time through a water temperature sensor provided in the methanol engine cooling system.

[0086] Step S403: when the coolant temperature reaches a second temperature threshold, starting the methanol engine based on the methanol fuel injected by the methanol injector.

[0087] The second temperature threshold is the temperature threshold for atomizing and evaporating the methanol fuel, that is, when the coolant temperature reaches the second temperature threshold, the methanol fuel injected by the methanol injector can be atomized and evaporated, and then this embodiment can start the methanol engine based on the atomized and evaporated methanol fuel.

[0088] Optionally, the second temperature threshold may be 40°C.

[0089] Of course, the second temperature threshold may also be other values, which are not specifically limited in this application.

[0090] The methanol engine cold start method provided by the present application controls the fuel heater to heat the air in the first channel and the coolant in the second channel when the ambient temperature is less than the first temperature threshold, monitors the coolant temperature of the methanol engine cooling system, and starts the methanol engine based on the methanol fuel injected by the methanol injector when the coolant temperature reaches the second temperature threshold. It can be seen that the present application heats the air and the coolant at the same time by the fuel heater, realizes the simultaneous heating of the engine coolant and the intake pipe assembly in a low temperature environment, can quickly increase the ambient temperature around the methanol injector nozzle, and then the methanol fuel injected by the methanol injector can be quickly atomized and evaporated, which not only realizes the cold start of the methanol engine, but also improves the efficiency of the cold start of the methanol engine.

[0091] In a possible implementation, considering that the methanol engine can be cold-started in a low-temperature environment after the coolant temperature reaches the second temperature threshold, continuing to heat at this time will waste the energy of the fuel heater. Based on this, optionally, when the coolant temperature reaches the second temperature threshold, this embodiment can control the fuel heater to stop working.

[0092] In another possible implementation, considering that when the temperature of the intake pipe assembly is high, it may damage components such as sensors and actuators. To avoid damage to the above components, optionally, a three-way solenoid valve may be provided between the fuel heater of the first channel and the intake pipe assembly in this embodiment.

[0093] like Figure 6 Shown is a schematic diagram of the structure of a methanol engine cold start system provided in the present application.

[0094] The first channel Figure 6 As shown by the bold solid line, the first channel is provided with a three-way solenoid valve 650 , and the three-way solenoid valve 650 is located between the fuel heater 620 and the intake pipe assembly 510 .

[0095] Air can enter the first channel from the fuel heater 620 . After the fuel heater 620 heats the air, the hot air passes through the three-way solenoid valve 650 to reach the area around the intake pipe assembly 510 to heat the intake pipe assembly 510 .

[0096] The second channel is Figure 6 As shown by the thinner solid line, the second channel includes a fuel heater 620, a thermostat 630 and an engine water pump 640. The engine water pump 640 can extract coolant from the methanol engine cooling system and then send the extracted coolant to the fuel heater 620 for heating. The heated coolant then returns to the methanol engine cooling system through the thermostat 630.

[0097] In the embodiment of the present application, the above-mentioned three-way solenoid valve 650 has a structure with one inlet and two outlets, that is, the three-way solenoid valve 650 has a first outlet and a second outlet. When hot air is needed to heat the intake pipe assembly 510, the first outlet can be connected so that the hot air can reach the surrounding of the intake pipe assembly 510 to heat the intake pipe assembly 510. When hot air is not needed to heat the intake pipe assembly 510, the second outlet can be connected so that the hot air can pass into the atmosphere.

[0098] In a possible implementation, the present embodiment can monitor the intake air temperature of the intake pipe assembly 510 to determine whether it is necessary to vent the hot air to the atmosphere. If the intake air temperature reaches the third temperature threshold and the coolant temperature does not reach the second temperature threshold, that is, the temperature of the intake pipe assembly 510 is already very high, but the coolant temperature has not reached the predetermined second temperature threshold, the three-way solenoid valve 650 is controlled to switch from connecting to the first outlet to connecting to the second outlet to vent the hot air to the atmosphere.

[0099] Optional, such as Figure 6 In this embodiment, an intake air temperature sensor 511 may be provided on the intake pipe assembly 510 , so that the intake air temperature may be collected in real time through the intake air temperature sensor 511 .

[0100] Optionally, the third temperature threshold may be 80°C.

[0101] Of course, the third temperature threshold may also be other values, which are not specifically limited in this application.

[0102] In yet another possible implementation, in order to more fully utilize the energy of the fuel heater, the present application also provides another methanol engine cold start system.

[0103] like Figure 7 Shown is a schematic diagram of the structure of another methanol engine cold start system provided in the present application.

[0104] Compared to Figure 6 The hot air heats the intake pipe assembly and then is discharged directly into the atmosphere. Figure 7 After the hot air heats the air intake pipe assembly, the hot air may be further used to heat the breathing system 660 .

[0105] That is, when the first outlet of the three-way solenoid valve 650 is connected, the heated air also heats the breathing system 660 .

[0106] like Figure 7 The breathing system 660 includes a cylinder head cover 661 , a crankcase 662 and an oil-gas separator 663 .

[0107] It should be noted that, in this embodiment, an air intake hole is provided on the cylinder head cover to allow hot air to flow to the subsequent crankcase 662 and the oil-gas separator 663 .

[0108] In order to enable those skilled in the art to better understand the present application, the present application is described in detail below through a specific scenario.

[0109] The engine control unit obtains the ambient temperature, and turns on the fuel heater when the ambient temperature is less than a first temperature threshold and before the methanol engine is started.

[0110] The fuel heater absorbs air from the atmosphere, heats the air with its internal heat, obtains hot air and outputs it. At the same time, the engine water pump extracts coolant from the methanol engine cooling system and transmits it to the fuel heater, which then heats the coolant and outputs it.

[0111] When the first outlet of the three-way solenoid valve is connected, the hot air passes through the three-way solenoid valve into the intake air sleeve of the intake pipe assembly to heat the intake pipe assembly, and then flows to the cylinder head cover (an air intake hole is provided on the cylinder head cover), the crankcase and the oil-gas separator in sequence, and finally passes into the atmosphere, thereby preheating the intake pipe assembly and the crankcase ventilation line.

[0112] The coolant output by the fuel heater returns to the methanol engine cooling system through the thermostat to further heat the methanol engine.

[0113] When the intake pipe assembly is preheated and the methanol engine coolant is heated, the methanol fuel sprayed by the methanol injector installed in the intake manifold can be quickly atomized and evaporated, thereby starting the methanol engine.

[0114] In the above process, the present application can monitor the coolant temperature of the methanol engine cooling system in real time through the water temperature sensor of the methanol engine cooling system, and at the same time, monitor the intake air temperature of the intake pipe assembly in real time through the intake air temperature sensor set in the intake pipe assembly. The monitored coolant temperature and intake air temperature can be transmitted to the engine control unit.

[0115] When the engine control unit determines that the coolant temperature reaches the second temperature threshold (such as 40°C) and the intake air temperature reaches the third temperature threshold (such as 80°C), the fuel heater is controlled to stop working and the methanol engine is started based on the atomized evaporated methanol fuel.

[0116] When the engine control unit determines that the intake air temperature exceeds the third temperature threshold (such as 80°C), but the coolant temperature has not reached the second temperature threshold (such as 40°C), the three-way solenoid valve is controlled to switch from connecting to the first outlet to connecting to the second outlet, and the hot air is led to the atmosphere to prevent the intake pipe assembly temperature from being too high to damage the sensor, actuator and other components. When the coolant temperature reaches the second temperature threshold (such as 40°C), the fuel heater is controlled to stop working, and the methanol engine is started based on the atomized and evaporated methanol fuel.

[0117] When the engine control unit determines that the coolant temperature reaches the second temperature threshold (such as 40°C) but the intake air temperature does not reach the third temperature threshold (such as 80°C), the fuel heater is controlled to stop working and the methanol engine is started based on the atomized evaporated methanol fuel.

[0118] In summary, the present application utilizes the energy of the fuel heater 620 to heat the intake pipe assembly 510 and the engine coolant at the same time, thereby achieving reasonable use of energy, effectively improving the low-temperature starting performance of the methanol engine, and shortening the starting time. In addition, the present application also utilizes the energy of the fuel heater 620 to heat the breathing system 660, which can reduce the risk of oil emulsification.

[0119] A methanol engine cold start method provided in an embodiment of the present application is introduced above, and a device for executing the above-mentioned methanol engine cold start method will be introduced below.

[0120] See also Figure 8 , Figure 8 This is a schematic diagram of the structure of a methanol engine cold start device provided in an embodiment of the present application. Figure 8 As shown, the device may include:

[0121] The heating module 701 is used to control the fuel heater to heat the air in the first channel and the coolant in the second channel when the ambient temperature is less than the first temperature threshold, wherein the first channel allows the heated air to heat the intake pipe assembly, and the second channel allows the coolant from the methanol engine cooling system to be heated and then returned to the methanol engine cooling system;

[0122] The temperature monitoring module 702 is used to monitor the coolant temperature of the methanol engine cooling system;

[0123] The cold start module 703 is used to start the methanol engine based on the methanol fuel injected by the methanol injector when the coolant temperature reaches a second temperature threshold, wherein the second temperature threshold is a temperature threshold for atomizing and evaporating the methanol fuel.

[0124] The methanol engine cold start device provided by the present application controls the fuel heater to heat the air in the first channel and the coolant in the second channel through the heating module when the ambient temperature is less than the first temperature threshold, monitors the coolant temperature of the methanol engine cooling system through the temperature monitoring module, and starts the methanol engine based on the methanol fuel injected by the methanol injector when the coolant temperature reaches the second temperature threshold through the cold start module. It can be seen that the present application heats the air and coolant at the same time through the fuel heater, realizes the simultaneous heating of the engine coolant and the intake pipe assembly under low temperature environment, can quickly increase the ambient temperature around the methanol injector nozzle, and then the methanol fuel injected by the methanol injector can be quickly atomized and evaporated, which not only realizes the cold start of the methanol engine, but also improves the efficiency of the cold start of the methanol engine.

[0125] In a possible implementation, the first channel is an air intake sleeve that wraps the air intake pipe assembly, and fins are arranged inside the air intake sleeve.

[0126] In a possible implementation, the methanol engine cold start device provided in the present application may further include: a heating stop module.

[0127] The heating stop module is used to control the fuel heater to stop working when the coolant temperature reaches a second temperature threshold.

[0128] In a possible implementation, the temperature monitoring module may also be used to monitor the intake air temperature of the intake pipe assembly.

[0129] On this basis, the methanol engine cold start device provided in the present application may also include: a solenoid valve control module.

[0130] The solenoid valve control module is used to control the three-way solenoid valve to switch from connecting to the first outlet to connecting to the second outlet if the intake air temperature reaches a third temperature threshold and the coolant temperature does not reach a second temperature threshold, wherein the three-way solenoid valve is arranged in the first channel and is located between the fuel heater and the intake pipe assembly. When the first outlet is connected, the heated air heats the intake pipe assembly, and when the second outlet is connected, the heated air is discharged into the atmosphere.

[0131] In a possible implementation, when monitoring the intake air temperature of the intake pipe assembly, the temperature monitoring module may be specifically used to: collect the intake air temperature in real time through an intake air temperature sensor disposed in the intake pipe assembly.

[0132] In a possible implementation, when the first outlet is connected, the heated air also heats the breathing system, wherein the breathing system includes a cylinder head cover, a crankcase and an oil-gas separator.

[0133] The methanol engine cold start device provided in the present application corresponds to the methanol engine cold start method mentioned above. For details, please refer to the above introduction and will not be repeated here.

[0134] The present application also provides an electronic device in an embodiment. Fig. 9 As shown, it shows a schematic diagram of the structure of an electronic device suitable for implementing the embodiment of the present application. The electronic device in the embodiment of the present application may include but is not limited to fixed terminals such as mobile phones, laptops, PDAs (personal digital assistants), PADs (tablet computers), desktop computers, etc. Fig. 9 The electronic device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0135] like Fig. 9 As shown, the electronic device may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 801, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 802 or a program loaded from a storage device 808 to a random access memory (RAM) 803. When the electronic device is powered on, various programs and data required for the operation of the electronic device are also stored in the RAM 803. The processing device 801, the ROM 802, and the RAM 803 are connected to each other via a bus 804. An input / output (I / O) interface 805 is also connected to the bus 804.

[0136] Typically, the following devices may be connected to the I / O interface 805: input devices 806 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; output devices 807 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 808 including, for example, a memory card, a hard disk, etc.; and communication devices 809. The communication device 809 may allow the electronic device to communicate with other devices wirelessly or by wire to exchange data. Although Fig. 9 An electronic device having various devices is shown, but it should be understood that it is not required to implement or possess all the devices shown. More or fewer devices may be implemented or possessed instead.

[0137] Also provided in an embodiment of the present application is a computer program product including computer-readable instructions. When the computer-readable instructions are executed on an electronic device, the electronic device implements any one of the methanol engine cold start methods provided in the embodiments of the present application.

[0138] A computer-readable storage medium is also provided in an embodiment of the present application. The storage medium carries one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement any one of the methanol engine cold start methods provided in the embodiment of the present application.

[0139] It should also be noted that the device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the drawings of the device embodiments provided by the present application, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines.

[0140] Through the description of the above implementation mode, the technicians in the field can clearly understand that the present application can be implemented by means of software plus necessary general hardware, and of course, it can also be implemented by special hardware including special integrated circuits, special CPUs, special memories, special components, etc. In general, all functions completed by computer programs can be easily implemented by corresponding hardware, and the specific hardware structure used to implement the same function can also be various, such as analog circuits, digital circuits or special circuits. However, for the present application, software program implementation is a better implementation mode in more cases. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a readable storage medium, such as a computer floppy disk, a U disk, a mobile hard disk, a ROM, a RAM, a disk or an optical disk, etc., including a number of instructions to enable a computer device (which can be a personal computer, a training device, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0141] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments may be implemented in the form of a computer program product.

[0142] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, a computer, a training device, or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, training device, or data center. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a training device, a data center, etc. that includes one or more available media integrations. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)), etc.

Claims

1. A methanol engine cold start method, characterized in that: include: When the ambient temperature is less than a first temperature threshold, controlling the fuel heater to heat the air in the first channel and the coolant in the second channel, wherein the first channel allows the heated air to heat the intake pipe assembly, and the second channel allows the coolant from the methanol engine cooling system to be heated and then returned to the methanol engine cooling system; Monitoring the coolant temperature of the methanol engine cooling system; When the coolant temperature reaches a second temperature threshold, starting the methanol engine based on the methanol fuel injected by the methanol injector, wherein the second temperature threshold is a temperature threshold for causing the methanol fuel to atomize and evaporate; monitoring the intake air temperature of the intake pipe assembly; If the intake air temperature reaches the third temperature threshold and the coolant temperature does not reach the second temperature threshold, the three-way solenoid valve is controlled to switch from connecting to the first outlet to connecting to the second outlet, wherein the three-way solenoid valve is arranged in the first channel and is located between the fuel heater and the intake pipe assembly, when the first outlet is connected, the heated air heats the intake pipe assembly, and when the second outlet is connected, the heated air is discharged into the atmosphere.

2. The methanol engine cold start method according to claim 1, characterized in that: The first channel is an air intake sleeve that wraps the air intake pipe assembly, and fins are arranged inside the air intake sleeve.

3. The methanol engine cold start method according to claim 1, characterized in that: Also includes: When the coolant temperature reaches the second temperature threshold, the fuel heater is controlled to stop operating.

4. The methanol engine cold start method according to claim 1, characterized in that: The monitoring of the intake air temperature of the intake pipe assembly includes: The intake air temperature is collected in real time by an intake air temperature sensor arranged in the intake pipe assembly.

5. The methanol engine cold start method according to claim 1, characterized in that: When the first outlet is connected, the heated air also heats a breathing system, wherein the breathing system includes a cylinder head cover, a crankcase and an oil-gas separator.

6. A methanol engine cold start device, characterized in that: include: a heating module, for controlling the fuel heater to heat the air in the first channel and the coolant in the second channel when the ambient temperature is less than a first temperature threshold, wherein the first channel enables the heated air to heat the intake pipe assembly, and the second channel enables the coolant from the methanol engine cooling system to be heated and then returned to the methanol engine cooling system; A temperature monitoring module, used to monitor the coolant temperature of the methanol engine cooling system; a cold start module, configured to start the methanol engine based on the methanol fuel injected by the methanol injector when the temperature of the coolant reaches a second temperature threshold, wherein the second temperature threshold is a temperature threshold for causing the methanol fuel to atomize and evaporate; The temperature monitoring module is also used to monitor the intake air temperature of the intake pipe assembly; A solenoid valve control module is used to control the three-way solenoid valve to switch from connecting to the first outlet to connecting to the second outlet if the intake air temperature reaches a third temperature threshold and the coolant temperature does not reach the second temperature threshold, wherein the three-way solenoid valve is arranged in the first channel and is located between the fuel heater and the intake pipe assembly, when the first outlet is connected, the heated air heats the intake pipe assembly, and when the second outlet is connected, the heated air is discharged into the atmosphere.

7. A computer program product, characterized in that It comprises computer-readable instructions, and when the computer-readable instructions are executed on an electronic device, the electronic device implements the methanol engine cold start method as claimed in any one of claims 1 to 5.

8. An electronic device, characterized in that: The method comprises at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is used to execute the computer program so that the electronic device can implement the methanol engine cold start method as described in any one of claims 1 to 5.

9. A computer storage medium, characterized in that The storage medium carries one or more computer programs, which, when executed by an electronic device, enable the electronic device to implement the methanol engine cold start method as described in any one of claims 1 to 5.

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