Hybrid vehicle engine cold start preheating method, system, equipment and medium

Abstract

The invention belongs to the technical field of hybrid electric vehicle engine preheating, and provides a hybrid electric vehicle engine cold start preheating method, system and device and a medium, and the method comprises the steps that the temperature of a battery pack cooling liquid is collected, and first temperature information is obtained; when the first temperature information meets a first preset heating threshold value, an engine cold start preheating strategy is executed; when the first preset heating threshold value is not met, the battery pack cooling liquid is subjected to self-preheating; and when the engine cold start preheating strategy is executed, the temperature of engine cooling liquid of the hybrid electric vehicle is collected, second temperature information is obtained, and when the second temperature information does not meet the engine start threshold value, the battery pack cooling liquid is used for preheating the engine cooling liquid till the second temperature information meets the engine start threshold value. The method is suitable for the hybrid diesel engine vehicle, an existing electric heating cold start preheating system can be omitted, potential safety hazards after electric aging are eliminated, the cost is reduced, the cold start performance is improved, and the start failure rate is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of hybrid vehicle engine preheating, and in particular to a hybrid vehicle engine cold start preheating method, system, equipment and medium. Background Art

[0002] To reduce fuel consumption and emissions in commercial vehicles, the industry is developing hybrid systems for commercial vehicles, adding an electromechanical control system to traditional diesel engines. These systems switch between different hybrid drive modes based on the vehicle's operating conditions, using electricity for short-distance, low-temperature, and urban driving conditions, and gasoline for long-distance, suburban, and highway driving. This optimizes energy utilization, resulting in optimal fuel consumption and minimal emissions. Therefore, the engine is shut down in unsuitable operating conditions and started in suitable conditions.

[0003] Due to the unique combustion characteristics of diesel engines, starting the engine in low ambient temperatures requires heating the engine's intake system or coolant before it can be started successfully. Therefore, both pure diesel and hybrid diesel vehicles are equipped with a cold start preheating system.

[0004] The current cold start preheating system of diesel engines can be divided into two types: in-cylinder preheating and out-of-cylinder preheating: 1. In-cylinder preheating: An electric heating plug is installed at the top of the engine cylinder. Before the engine is started, the electric heating plug is energized. The heat emitted by the electric heating plug increases the temperature in the engine cylinder, thereby improving the engine's cold start performance; 2. Out-of-cylinder preheating: An electric heating grid is installed in the engine's intake pipe. Before the engine is started, the electric heating grid is energized. The heat emitted by the electric heating grid increases the air temperature in the engine's intake pipe. When the engine starts, the hotter air is sucked into the cylinder to participate in combustion, thereby improving the engine's cold start performance.

[0005] However, the cold start preheating system of the above diesel engine has the following disadvantages: 1) The system is complex and the cost is high: whether it is in-cylinder preheating or out-of-cylinder preheating, an electric heating system needs to be installed on the engine, and the power is large, requiring high-specification heaters, wires, relays and other components, which are expensive; 2) There are safety hazards: Due to the use of high-power heaters, there will be high temperatures and currents during the heating process. After long-term use of the vehicle, the performance of the electrical components will age, which may easily cause electrical short circuits, relay electric shock and adhesion, and even vehicle fires; 3) The cold start failure rate is high and it does not support multiple uses within a period of time: The heater will degrade in performance after being used many times. In order to ensure the smooth completion of the engine cold start, preheating is required multiple times, but the preheating process will consume a large amount of low-voltage battery power. If the low-voltage battery power is insufficient, it may cause the vehicle's starter to output insufficient power or fail to work, resulting in start failure.

[0006] To address the above issues, relevant technical personnel have designed a variety of engine preheating methods. For example, the patent application document with publication number CN111255541A discloses a hybrid vehicle engine preheating system, in which the engine coolant outlet is connected to the engine radiator via a first pipe, and the engine coolant inlet is connected to the engine radiator via a second pipe; the motor cooler inlet is connected to the electric drive radiator via a third pipe, and the motor oil cooler outlet is connected to the electric drive radiator via a fourth pipe. The first and third pipes are connected and a solenoid valve is provided at the connection point, and the second and fourth pipes are connected and a solenoid valve is provided at the connection point. However, the above system directly utilizes the heat of the motor coolant and relies on the motor operating conditions. If the motor is not running, it cannot be preheated. It is more suitable for hybrid passenger vehicles and relies on the motor's waste heat, which may be insufficient in extremely low temperatures. Summary of the Invention

[0007] In view of the above-mentioned shortcomings of the prior art, the present invention provides a hybrid vehicle engine cold start preheating method, system, equipment and medium, which are suitable for hybrid diesel engine vehicles and can eliminate the existing electrical heating cold start preheating system, eliminate the safety hazards caused by electrical aging and reduce costs, and improve cold start performance and reduce the start failure rate.

[0008] To achieve the above-mentioned and related purposes, the present invention adopts the following technical solutions:

[0009] A first aspect of the present invention provides a hybrid vehicle engine cold start preheating method, comprising the following steps:

[0010] Step S100, collecting the temperature of the battery pack coolant of the hybrid vehicle to obtain first temperature information;

[0011] Step S200: When the first temperature information meets the first preset heating threshold, the engine cold start preheating strategy is executed; when the first temperature information does not meet the first preset heating threshold, the battery pack coolant is self-preheated;

[0012] In step S300, when executing the engine cold start preheating strategy, the engine coolant temperature of the hybrid vehicle is collected to obtain second temperature information. When the second temperature information does not meet the engine start threshold, the engine coolant is preheated using the battery pack coolant until the second temperature information meets the engine start threshold.

[0013] Furthermore, in step S300, preheating the engine coolant using the battery pack coolant includes:

[0014] If the first temperature information exceeds the second preset heating threshold, the battery pack coolant is cooled until the first temperature information meets the second preset heating threshold, and the battery pack coolant is used to preheat the engine coolant, wherein the value of the second preset heating threshold is greater than the value of the first preset heating threshold.

[0015] Further, in step S300 , the value of the second preset heating threshold is greater than the value of the engine start threshold.

[0016] A second aspect of the present invention provides a hybrid vehicle engine cold start preheating system, comprising an engine, a power battery, and a first electronically controlled three-way valve. The engine and the power battery are connected by a pipeline to form a coolant circulation loop. The first electronically controlled three-way valve is arranged on the coolant circulation loop. A coolant self-preheating loop is formed between the first electronically controlled three-way valve and the power battery, and an engine start preheating loop is formed between the first electronically controlled three-way valve and the engine. The coolant self-preheating loop and the engine start preheating loop are connected to form a coolant circulation loop by opening the first electronically controlled three-way valve.

[0017] Furthermore, it also includes a first temperature sensor installed on the coolant self-preheating circuit and a second temperature sensor installed on the engine start-up preheating circuit.

[0018] Furthermore, it also includes a second electrically controlled three-way valve and a heater installed on the coolant self-preheating circuit, and the second electrically controlled three-way valve is located at the liquid inlet of the heater.

[0019] Furthermore, it also includes a third electrically controlled three-way valve and a radiator installed on the coolant self-preheating circuit, and the third electrically controlled three-way valve is located at the liquid inlet of the radiator.

[0020] A third aspect of the present invention provides a hybrid vehicle engine cold start preheating system, comprising:

[0021] an acquisition module, configured to acquire a temperature of a battery pack coolant of a hybrid vehicle to obtain first temperature information;

[0022] A self-preheating module, configured to execute an engine cold start preheating strategy when the first temperature information meets a first preset heating threshold; and to self-preheat the battery pack coolant when the first temperature information does not meet the first preset heating threshold;

[0023] The cold start preheating module is used to collect the engine coolant temperature of the hybrid vehicle and obtain second temperature information when executing the engine cold start preheating strategy. When the second temperature information does not meet the engine start threshold, the battery pack coolant is used to preheat the engine coolant until the second temperature information meets the engine start threshold.

[0024] A fourth aspect of the present invention provides a computer-readable storage medium having computer-readable instructions stored thereon. When the computer-readable instructions are executed by a processor of a computer, the computer is caused to execute the above-mentioned hybrid vehicle engine cold start preheating method.

[0025] A fifth aspect of the present invention provides a computer device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the hybrid vehicle engine cold start preheating method are implemented.

[0026] The beneficial technical effects of the present invention are:

[0027] The present invention preheats the engine coolant through the waste heat of the battery pack coolant of the power battery, which can eliminate the existing electric heating intake preheating device, reduce engine costs, and eliminate the risks of aging, short circuit and fire of heating components; moreover, coolant preheating can increase the temperature of the entire engine, which can not only increase the temperature of the intake pipe and cylinder, but also increase the oil temperature, reduce the starting load of the engine, and achieve a better cold start effect.

[0028] The present invention can improve the integration of components and reduce the types of components, making the entire vehicle structure simpler and the system more lightweight.

[0029] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrating embodiments consistent with the present application and, together with the specification, serving to explain the principles of the present application. It is obvious that the drawings described below are merely some embodiments of the present application, and it is possible for a person of ordinary skill in the art to derive other drawings based on these drawings without inventive effort. In the accompanying drawings:

[0031] Figure 1This is a flow chart of the cold start preheating method for a hybrid vehicle engine in this application;

[0032] Figure 2 This is a schematic diagram of the structure of the cold start preheating system of the hybrid vehicle engine in this application;

[0033] Figure 3 This is another exemplary preheating method flow chart of the present application;

[0034] Figure 4 This is a framework diagram of the hybrid vehicle engine cold start preheating system for this application;

[0035] Figure 5 A schematic structural diagram of a computer system suitable for a computer device according to an embodiment of the present application is shown.

[0036] Reference numerals

[0037] 1: Engine; 2: Power battery; 3: Heater; 4: Radiator; 5: First temperature sensor; 6: Second temperature sensor; 7: Vehicle controller; 8: First electronically controlled three-way valve; 9: Second electronically controlled three-way valve; 10: Third electronically controlled three-way valve; 11: Electronic water pump. DETAILED DESCRIPTION

[0038] Unless otherwise defined, all technical and / or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the invention pertains. It should be understood that certain features of the invention (described in the context of separate embodiments for clarity) may also be provided in combination in a single embodiment. Conversely, multiple features of the invention (described in the context of a single embodiment for brevity) may also be provided separately or in any suitable combination or, where appropriate, in any other described embodiment of the invention. Certain features described in the context of various embodiments will not be considered essential features of those embodiments unless the embodiment is inoperable without those elements. The invention is further described below through specific examples, but it should be noted that the specific process conditions and results described in the examples of the invention are only for illustration of the invention and are not intended to limit the scope of protection of the invention. Any equivalent changes or modifications made in accordance with the spirit and substance of the invention should be included within the scope of protection of the invention.

[0039] See also Figure 1 , is a flow chart of the cold start preheating method for a hybrid vehicle engine of this application, which is described in detail as follows:

[0040] Step S100 , collecting the temperature of the battery pack coolant of the hybrid vehicle to obtain first temperature information.

[0041] Specifically, please combine Figure 3When the vehicle is in the starting state, the power battery outputs power, and the temperature sensor collects the battery pack coolant temperature of the hybrid power battery in real time to obtain real-time temperature information, that is, the first temperature information.

[0042] Step S200: When the first temperature information meets the first preset heating threshold, the engine cold start preheating strategy is executed; when the first temperature information does not meet the first preset heating threshold, the battery pack coolant is self-preheated.

[0043] Specifically, the lower limit of the first preset heating threshold t1 of this application must be higher than the low-temperature performance critical point of the power battery to prevent the power battery's charging and discharging efficiency from decreasing due to low temperatures; the upper limit should be lower than the power battery's optimal operating temperature limit to prevent overheating that affects battery life. The first preset heating threshold of this application can be set based on the performance characteristics of the power battery, for example, t1 is 10°C to 15°C.

[0044] More specifically, when the battery pack coolant temperature is less than t1, it is determined that the first temperature information does not meet the first preset heating threshold, the electronic water pump is started, and the heater is used to heat the battery pack coolant to complete self-preheating of the battery pack coolant.

[0045] In step S300, when executing the engine cold start preheating strategy, the engine coolant temperature of the hybrid vehicle is collected to obtain second temperature information. When the second temperature information does not meet the engine start threshold, the engine coolant is preheated using the battery pack coolant until the second temperature information meets the engine start threshold.

[0046] Specifically, when the battery pack coolant temperature is ≥ t1, the first temperature information is determined to meet the first preset heating threshold, and the engine cold start preheating strategy is executed. At this point, the first temperature information is re-evaluated. If the first temperature information exceeds the second preset heating threshold, the battery pack coolant is cooled until the first temperature information meets the second preset heating threshold. At this point, the battery pack coolant is used to preheat the engine coolant, where the second preset heating threshold is greater than the first preset heating threshold.

[0047] More specifically, the second preset heating threshold in this application is the battery pack coolant temperature drop threshold. When the battery pack coolant temperature is too high, it must first be cooled to below this threshold before being used to preheat the engine coolant to prevent engine overheating or battery performance damage. The lower limit of the second preset heating threshold in this application should be higher than the first preset heating threshold to ensure preheating efficiency; the lower limit must be lower than the power battery high temperature warning threshold. The specific setting depends on the power battery type and is combined with the engine coolant target temperature. For example, the second preset heating threshold is 25°C to 30°C.

[0048] More specifically, the value of the second preset heating threshold of the present application is greater than the value of the engine start threshold. The engine start threshold of the present application is the threshold for meeting the standard of the second temperature information. When the engine is cold-started, the viscosity of the engine oil increases as the temperature decreases. It is necessary to ensure that the engine coolant temperature reaches a certain range, such as 20°C~30°C, to ensure that the engine lubrication system works effectively; and the fuel atomization is poor at low engine temperatures, and it needs to be preheated to at least 15°C to reduce incomplete combustion and carbon deposits. The present application relies on the battery pack coolant of the power battery to preheat the engine, and it is necessary to avoid the engine coolant temperature being too high, causing the battery pack coolant to overheat and affect battery performance. Therefore, the engine start threshold of the present application is set according to the influence of the above factors, for example, 15°C~20°C. In actual applications, if the engine start threshold requirement is higher, such as reaching 25°C in plateau areas, the second preset heating threshold needs to be increased simultaneously to ensure that the battery pack coolant can provide sufficient heat.

[0049] More specifically, when the engine coolant temperature is less than the engine start threshold t2, the three-way valve on the power battery and engine coolant circulation pipeline is opened, and the battery pack coolant is used to preheat the engine coolant until the second temperature information meets the engine start threshold, and then the engine is started.

[0050] See also Figure 2 The present invention also provides a hybrid vehicle engine cold start preheating system, including an engine 1, a power battery 2 and a first electronically controlled three-way valve 8. The engine 1 and the power battery 2 are connected by a pipeline to form a coolant circulation loop. The first electronically controlled three-way valve 8 is arranged on the coolant circulation loop, and a coolant self-preheating loop is formed between the first electronically controlled three-way valve 8 and the power battery 2, and an engine starting preheating loop is formed between the first electronically controlled three-way valve 8 and the engine 1. The coolant self-preheating loop and the engine 1 starting preheating loop are connected by opening the first electronically controlled three-way valve 8 to form a coolant circulation loop.

[0051] Specifically, the hybrid vehicle's electric drive system primarily includes a drive motor and a power battery 2. To ensure proper battery operation, thermal management is required: cooling the battery pack when temperatures are too high and heating it when temperatures are too low. When the battery begins operating, the battery module generates heat, requiring coolant to cool and dissipate the heat. At this point, the heat generated by the battery pack is transferred to the engine 1 through the coolant circulation line, raising the engine coolant temperature. This, in turn, raises the overall temperature of components such as the engine cylinders and intake manifolds, effectively preheating the engine.

[0052] Specifically, the system of the present application further includes a first temperature sensor 5 installed in the coolant self-heating circuit and a second temperature sensor 6 installed in the engine start-up preheating circuit. The first temperature sensor 5 and the second temperature sensor 6 of the present application are respectively used to measure the coolant temperature in their corresponding circuits in real time.

[0053] Specifically, the system of the present application further includes a second electrically controlled three-way valve 9 and a heater 3 installed in the coolant self-preheating circuit. The second electrically controlled three-way valve 9 is located at the liquid inlet of the heater 3. The heater 3 of the present application is used to heat the coolant. When the battery temperature is low, the coolant in the battery pack needs to be heated to keep the battery operating at a suitable ambient temperature.

[0054] Specifically, the system of the present application further includes a third electrically controlled three-way valve 10 and a radiator 4 installed in the coolant self-preheating circuit. The third electrically controlled three-way valve 10 is located at the liquid inlet of the radiator 4. The radiator 4 of the present application is used to dissipate heat from the coolant. When the coolant temperature is too high, the VCU controls the three-way valve to conduct to allow the coolant to flow through the radiator 4.

[0055] Specifically, the present application controls the different opening and closing states of the first electrically controlled three-way valve 8, the second electrically controlled three-way valve 9 and the third electrically controlled three-way valve 10, so that the 2-phase or 3-phase pipelines in the connected pipelines are connected, which is used to control the flow direction and on-off of the coolant in the pipeline.

[0056] Specifically, the system of the present application further includes an electronic water pump 11 installed on the coolant self-preheating circuit, which is used to promote the flow of coolant.

[0057] Specifically, the system of the present application also includes a vehicle controller 7 (VCU), which is used to monitor the coolant temperature in the diesel engine 1, the coolant temperature of the power battery 2, control the electronic water pump 11 and control the electronically controlled three-way valve.

[0058] Specifically, after a vehicle equipped with the system of the present application is started, the battery pack coolant temperature is monitored in real time. When the temperature is less than a first preset heating threshold, the second electrically controlled three-way valve 9 can be opened, and the electronic water pump 11 and heater 3 can be used to self-preheat the coolant. When the temperature after self-preheating reaches the first preset heating threshold, the second electrically controlled three-way valve 9 is closed. At this time, if the temperature exceeds the second preset heating threshold, the third electrically controlled three-way valve 10 is opened, and the first and second electrically controlled three-way valves 8 and 9 are closed. The coolant is cooled using the radiator 4. When the temperature drops to the second preset heating threshold, the second electrically controlled three-way valve 9 is closed and the first electrically controlled three-way valve 8 is opened. At this time, the coolant temperature reaches the second preset heating threshold. The coolant self-preheating circuit and the engine start-up preheating circuit are connected by opening the first electrically controlled three-way valve 8 to form a coolant circulation loop, allowing the higher temperature coolant to flow through the entire cooling pipe and cooling water jacket of the engine 1. Since the cooling water jacket in the engine 1 is spread over the entire body of the engine 1 , the cylinder and the intake pipe of the engine 1 can be fully preheated, thereby achieving the effect of preheating when starting.

[0059] See also Figure 4, which is a framework diagram of a hybrid vehicle engine cold start preheating system 400 of this application, including:

[0060] The acquisition module 410 is configured to acquire the temperature of the battery pack coolant of the hybrid vehicle to obtain first temperature information;

[0061] The self-preheating module 420 is configured to execute the engine cold start preheating strategy when the first temperature information meets the first preset heating threshold; and to self-preheat the battery pack coolant when the first temperature information does not meet the first preset heating threshold;

[0062] The cold start preheating module 430 is used to collect the engine coolant temperature of the hybrid vehicle to obtain second temperature information when executing the engine cold start preheating strategy. When the second temperature information does not meet the engine start threshold, the battery pack coolant is used to preheat the engine coolant until the second temperature information meets the engine start threshold.

[0063] It should be noted that the hybrid vehicle engine cold-start preheating system provided in the above-described embodiment and the hybrid vehicle engine cold-start preheating method provided in the above-described embodiment share the same concept. The specific manner in which each module and unit performs its operations has been described in detail in the method embodiments and will not be repeated here. In actual applications, the hybrid vehicle engine cold-start preheating system provided in the above-described embodiment can, as needed, allocate the aforementioned functions to different functional modules, i.e., divide the system's internal structure into different functional modules to perform all or part of the aforementioned functions, and this is not intended to be limiting herein.

[0064] An embodiment of the present application also provides a computer device, comprising: one or more processors; a storage device for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the computer device implements the hybrid vehicle engine cold start preheating method provided in each of the above embodiments.

[0065] Figure 5 The following is a schematic diagram showing the structure of a computer system suitable for a computer device according to an embodiment of the present application. Figure 5 The computer system 500 of the electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0066] like Figure 5As shown, computer system 500 includes a central processing unit (CPU) 501, which can perform various appropriate actions and processes according to programs stored in read-only memory (ROM) 502 or programs loaded from storage unit 508 into random access memory (RAM) 503, such as executing the methods described in the above embodiments. RAM 503 also stores various programs and data required for system operation. CPU 501, ROM 502, and RAM 503 are connected to each other via bus 504. An input / output (I / O) interface 505 is also connected to bus 504. The following components are connected to I / O interface 505: an input unit 506 including a keyboard, mouse, etc.; an output unit 507 including a cathode ray tube (CRT), liquid crystal display (LCD), speakers, etc.; a storage unit 508 including a hard disk; and a communication unit 509 including a network interface card such as a LAN (local area network) card or modem. Communication unit 509 performs communication processing via a network such as the Internet. A driver 510 is also connected to I / O interface 505 as needed. A removable medium 511, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is mounted on the drive 510 as needed, so that a computer program read therefrom is installed into the storage section 508 as needed.

[0067] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer tool program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 509, and / or installed from the removable medium 511. When the computer program is executed by the central processing unit (CPU) 501, the various functions defined in the system of the present application are executed.

[0068] It should be noted that the computer-readable medium described in the embodiments of this application may be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium may, for example, be an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to, an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory, read-only memory, erasable programmable read-only memory, flash memory, optical fiber, a portable compact disk read-only memory, an optical storage device, a magnetic storage device, or any suitable combination thereof. In this application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying a computer-readable computer program. This propagated data signal may take a variety of forms, including, but not limited to, an electromagnetic signal, an optical signal, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transfer a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. The computer program embodied on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, etc., or any suitable combination of the foregoing.

[0069] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. Among them, each box in the flowchart or block diagram can represent a module, program segment, or part of the code, and the above-mentioned module, program segment, or part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0070] The units involved in the embodiments described in this application can be implemented by tools or hardware, and the units described can also be set in a processor. In some cases, the names of these units do not constitute limitations on the units themselves.

[0071] Another aspect of the present application provides a computer-readable storage medium storing a computer program. When executed by a computer processor, the computer program causes the computer to perform the hybrid vehicle engine cold start preheating method described above. The computer-readable storage medium may be included in the computer device described in the above embodiments, or may exist independently and not be incorporated into the computer device.

[0072] Another aspect of the present application provides a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the hybrid vehicle engine cold start preheating method provided in each of the above embodiments.

[0073] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A hybrid vehicle engine cold start preheating method, characterized in that: The following steps are involved: Step S100, collecting the temperature of the battery pack coolant of the hybrid vehicle to obtain first temperature information; Step S200, when the first temperature information meets a first preset heating threshold, executing an engine cold start preheating strategy; When the first temperature information does not meet the first preset heating threshold, self-preheating the battery pack coolant; In step S300, when executing the engine cold start preheating strategy, the engine coolant temperature of the hybrid vehicle is collected to obtain second temperature information. When the second temperature information does not meet the engine start threshold, the engine coolant is preheated using the battery pack coolant until the second temperature information meets the engine start threshold.

2. The method according to claim 1, characterized in that In step S300, preheating the engine coolant using the battery pack coolant includes: If the first temperature information exceeds a second preset heating threshold, the battery pack coolant is cooled until the first temperature information meets the second preset heating threshold, and the battery pack coolant is used to preheat the engine coolant, wherein the value of the second preset heating threshold is greater than the value of the first preset heating threshold.

3. The method according to claim 2, characterized in that In step S300 , the second preset heating threshold is greater than the engine start threshold.

4. A hybrid vehicle engine cold start preheating system, characterized in that: The invention comprises an engine, a power battery and a first electrically controlled three-way valve, wherein the engine and the power battery are connected by a pipeline to form a coolant circulation loop, the first electrically controlled three-way valve is arranged on the coolant circulation loop, and a coolant self-preheating loop is formed between the first electrically controlled three-way valve and the power battery, and an engine starting preheating loop is formed between the first electrically controlled three-way valve and the engine, and the coolant self-preheating loop and the engine starting preheating loop are connected by opening the first electrically controlled three-way valve to form the coolant circulation loop.

5. The system according to claim 4, characterized in that It also includes a first temperature sensor installed on the coolant self-preheating circuit and a second temperature sensor installed on the engine starting preheating circuit.

6. The system according to claim 5, characterized in that It also includes a second electrically controlled three-way valve and a heater installed on the coolant self-preheating circuit, and the second electrically controlled three-way valve is located at the liquid inlet of the heater.

7. The system according to claim 6, characterized in that It also includes a third electrically controlled three-way valve and a radiator installed on the coolant self-preheating circuit, and the third electrically controlled three-way valve is located at the liquid inlet of the radiator.

8. A hybrid vehicle engine cold start preheating system, characterized in that: include: an acquisition module, configured to acquire a temperature of a battery pack coolant of a hybrid vehicle to obtain first temperature information; a self-preheating module, configured to execute an engine cold start preheating strategy when the first temperature information meets a first preset heating threshold; and self-preheat the battery pack coolant when the first temperature information does not meet the first preset heating threshold; The cold start preheating module is used to collect the engine coolant temperature of the hybrid vehicle to obtain second temperature information when executing the engine cold start preheating strategy. When the second temperature information does not meet the engine start threshold, the battery pack coolant is used to preheat the engine coolant until the second temperature information meets the engine start threshold.

9. A computer-readable storage medium, characterized in that Computer-readable instructions are stored thereon, and when the computer-readable instructions are executed by a processor of a computer, the computer is caused to execute the cold-start preheating method for a hybrid vehicle engine according to any one of claims 1 to 3.

10. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the hybrid vehicle engine cold start preheating method according to any one of claims 1 to 3 are implemented.

Images