Engine cold start method, device and equipment of hybrid vehicle and storage medium

Abstract

The invention discloses an engine cold starting method, device and equipment of a hybrid vehicle and a storage medium, relates to the technical field of engine control, and discloses the engine cold starting method of the hybrid vehicle, which comprises the following steps: acquiring the charge state of a battery and the lubricating oil temperature of an engine; identifying a target cold start control mode according to the charge state or the lubricating oil temperature; according to the target cold start control mode, the operation state of at least one of an electromagnetic valve switch, a heat exchanger water inlet pipeline, a heat exchanger, a driving motor water outlet pipeline, a driving motor water inlet pipeline and a heat exchanger water outlet pipeline is controlled, and whether the vehicle meets the engine start condition or not is detected; and when the vehicle meets the engine starting condition, the engine is controlled to be started. Accurate control during cold start of the engine of the hybrid vehicle is achieved, engine oil preheating and start time is optimized, then the cold start efficiency of the engine is improved, and cold start energy consumption and emission are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine control, and particularly relates to an engine cold start method, device, equipment and storage medium of a hybrid vehicle. BACKGROUND

[0002] With the rapid development of the new energy automobile industry, hybrid electric vehicles gradually become an important direction in the automobile field due to longer cruising range and higher energy utilization efficiency. Hybrid electric vehicles have the dual driving characteristics of traditional engines and motors, and can realize driving and energy recovery through reasonable switching of the engine and the motor under different working conditions. Since the engine starts less frequently in hybrid electric vehicles, the vehicle relies on the motor for driving most of the time, and the engine will start when the power battery is insufficient or the power demand is large. Therefore, the vehicle may be in a normal driving state, but the engine is still in a closed and low-temperature cold state.

[0003] In this case, the cold start state of the engine is particularly common. For the case that the engine oil temperature is low when the engine is cold started, the traditional technology usually uses a single engine lubrication system and an independent motor cooling system to realize lubrication and heat dissipation during operation. The engine usually relies on the oil pump to extract lubricating oil from the oil pan to circulate to each component for lubrication, while the motor relies on the cooling liquid to flow through the motor and the radiator to complete heat dissipation under the drive of the cooling pump. Since the lubrication system and the cooling system operate independently, the engine oil can only rely on the engine's own combustion heat and the cooling liquid to gradually warm up to reduce the viscosity during cold start. This warming-up process is slow, resulting in high energy consumption and emission levels of the engine in the early stage of starting.

[0004] The above content is only used to assist in understanding the technical solutions of the present application, and does not represent the acknowledgement of the above content as prior art. SUMMARY

[0005] The main purpose of the present application is to provide an engine cold start method, device, equipment and storage medium of a hybrid vehicle, which aims to solve the technical problem that the engine oil temperature is too low during the cold start stage, resulting in low warming efficiency.

[0006] To achieve the above object, the application provides an engine cold start method of a hybrid vehicle, which is applied to an engine cold start system, and the engine cold start system comprises a heat exchanger water inlet pipeline, a heat exchanger, a driving motor water outlet pipeline, a driving motor water inlet pipeline, a heat exchanger water outlet pipeline and an engine, the engine is internally provided with the heat exchanger, the engine is connected with the heat exchanger water inlet pipeline and the heat exchanger water outlet pipeline respectively, the heat exchanger water inlet pipeline is provided with an electromagnetic valve switch, the heat exchanger water inlet pipeline is connected with the driving motor water outlet pipeline, and the heat exchanger water outlet pipeline is connected with the driving motor water inlet pipeline; the method comprises the following steps:

[0007] obtaining a state of charge of a battery and a lubricating engine oil temperature of the engine;

[0008] identifying a target cold start control mode according to the state of charge or the lubricating engine oil temperature;

[0009] controlling a running state of at least one of the electromagnetic valve switch, the heat exchanger water inlet pipeline, the heat exchanger, the driving motor water outlet pipeline, the driving motor water inlet pipeline and the heat exchanger water outlet pipeline according to the target cold start control mode, and detecting whether a vehicle meets an engine start condition;

[0010] controlling the engine to start when the vehicle meets the engine start condition.

[0011] In an embodiment, the step of controlling the running state of at least one of the electromagnetic valve switch, the heat exchanger water inlet pipeline, the heat exchanger, the driving motor water outlet pipeline, the driving motor water inlet pipeline and the heat exchanger water outlet pipeline according to the target cold start control mode comprises the following steps:

[0012] when the target cold start control mode is an oil preheating mode, the running state of the electromagnetic valve switch is controlled to be in an open state, so that high-temperature cooling liquid in the driving motor water outlet pipeline enters the heat exchanger through the heat exchanger water inlet pipeline and exchanges heat with lubricating engine oil in the engine.

[0013] In an embodiment, the step of controlling the running state of at least one of the electromagnetic valve switch, the heat exchanger water inlet pipeline, the heat exchanger, the driving motor water outlet pipeline, the driving motor water inlet pipeline and the heat exchanger water outlet pipeline according to the target cold start control mode further comprises the following steps:

[0014] In the target cold start control mode is preheating completion mode, the solenoid valve operating state is controlled to be closed state, the communication between the drive motor outlet water pipeline and the heat exchanger inlet water pipeline is cut off, so that the high temperature coolant flows into the drive motor inlet water pipeline through the drive motor outlet water pipeline.

[0015] In an embodiment, the step of identifying the target cold start control mode according to the state of charge or the lubricating oil temperature comprises:

[0016] Obtaining a first state of charge threshold and an oil temperature threshold;

[0017] When detecting that the state of charge is less than the first state of charge threshold, identifying the target cold start control mode as oil preheating mode;

[0018] When detecting that the lubricating oil temperature is greater than or equal to the oil temperature threshold, identifying the target cold start control mode as preheating completion mode.

[0019] In an embodiment, the step of detecting whether the vehicle meets the engine start condition comprises:

[0020] Obtaining a second state of charge threshold and an oil temperature threshold, wherein the first state of charge threshold is greater than the second state of charge threshold;

[0021] When detecting that the lubricating oil temperature is greater than or equal to the oil temperature threshold and the state of charge is less than the second state of charge threshold, determining that the vehicle meets the engine start condition.

[0022] In an embodiment, the engine cold start system further comprises a drive motor, a drive motor water pump and a drive motor radiator, the drive motor is connected with the drive motor outlet water pipeline, the drive motor inlet water pipeline and the drive motor water pump respectively, and the drive motor water pump is connected with the drive motor radiator;

[0023] Before the step of identifying the target cold start control mode according to the state of charge or the lubricating oil temperature, further comprising:

[0024] When the state of charge is greater than or equal to the first state of charge threshold, determining that the vehicle is in normal driving state;

[0025] Controlling the operating state of the drive motor, the drive motor water pump, the drive motor radiator, the drive motor outlet water pipeline and the drive motor inlet water pipeline to complete the drive motor heat dissipation.

[0026] In an embodiment, the step of controlling the operating state of the driving motor, the driving motor water pump, the driving motor radiator, the driving motor water outlet pipeline and the driving motor water inlet pipeline to complete the driving motor heat dissipation comprises:

[0027] controlling the driving motor water pump to start to drive the cooling liquid to flow through the driving motor water pump so that the high-temperature cooling liquid generated by the driving motor operation enters the driving motor radiator through the driving motor water outlet pipeline;

[0028] when the cooling liquid completes heat dissipation in the driving motor radiator, low-temperature cooling liquid is obtained, wherein the low-temperature cooling liquid returns to the driving motor interior through the driving motor water inlet pipeline to complete the driving motor heat dissipation.

[0029] In addition, to achieve the above object, the present application further provides an engine cold start device of a hybrid vehicle, which comprises: a data acquisition module, configured to acquire a state of charge of a battery and a lubricating oil temperature of an engine;

[0030] a mode recognition module, configured to recognize a target cold start control mode according to the state of charge or the lubricating oil temperature;

[0031] a state control module, configured to control an operating state of at least one of the electromagnetic valve switch, the heat exchanger water inlet pipeline, the heat exchanger, the driving motor water outlet pipeline, the driving motor water inlet pipeline and the heat exchanger water outlet pipeline according to the target cold start control mode, and detect whether a vehicle meets an engine start condition;

[0032] an engine start module, configured to control the engine to start when the vehicle meets the engine start condition.

[0033] In addition, to achieve the above object, the present application further provides an engine cold start device of a hybrid vehicle, which comprises: a memory, a processor and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the engine cold start method of the hybrid vehicle as described above.

[0034] In addition, to achieve the above object, the present application further provides a storage medium, which is a computer readable storage medium, and the storage medium stores a computer program, the computer program being executable by a processor to implement the steps of the engine cold start method of the hybrid vehicle as described above.

[0035] In addition, to achieve the above object, the application further provides a computer program product, which comprises a computer program, and the computer program realizes the steps of the engine cold start method of the hybrid vehicle when executed by a processor.

[0036] The one or more technical solutions provided in the application have at least the following technical effects:

[0037] Since the target cold start control mode is identified by acquiring the state of charge of the battery and the lubricating oil temperature of the engine, and then the running state of at least one of the electromagnetic valve switch, the heat exchanger water inlet pipeline, the heat exchanger, the driving motor water outlet pipeline, the driving motor water inlet pipeline and the heat exchanger water outlet pipeline is controlled according to the mode, the vehicle is detected whether it meets the engine start condition and the engine is controlled to start when it meets the condition, the technical means solves the problems in the prior art that the hybrid vehicle engine cold start lacks precise control logic based on the state of charge of the battery and the oil temperature, resulting in improper start timing, low energy utilization efficiency and large engine wear; compared with the prior art, the cold start control mode is determined by combining the state of charge of the battery and the oil temperature, the running state of the related components can be adjusted accordingly, the engine can be started under suitable conditions, and the effects of optimizing the engine cold start process, improving the energy utilization efficiency and reducing the engine cold start wear are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0038] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the application and, together with the specification, serve to explain the principles of the application.

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, those skilled in the art can obtain other drawings from these drawings without any creative effort.

[0040] Figure 1 A flowchart is provided for the engine cold start method of the hybrid vehicle according to Embodiment 1 of the application;

[0041] Figure 2 An engine cold start system structure diagram is provided for the engine cold start method of the hybrid vehicle according to Embodiment 1 of the application;

[0042] Figure 3 A flowchart is provided for the engine cold start method of the hybrid vehicle according to Embodiment 2 of the application;

[0043] Figure 4 A brief flowchart of the engine cold start method of the hybrid vehicle is provided for Embodiment 2 of the application;

[0044] Figure 5 This is a schematic diagram of the module structure of the engine cold start device for a hybrid vehicle according to an embodiment of this application;

[0045] Figure 6 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the engine cold start method of the hybrid vehicle in this application embodiment.

[0046] Explanation of icon numbers:

[0047] Engine 1; Drive motor 2; Drive motor radiator 3; Drive motor water pump 4; Solenoid valve switch 5; Engine oil pan 11; Heat exchanger 12; Drive motor water outlet pipe 100; Drive motor water inlet pipe 200; Heat exchanger water inlet pipe 300; Heat exchanger water outlet pipe 400.

[0048] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0049] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0050] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0051] The main solution of this application embodiment is: to obtain the state of charge of the battery and the lubricating oil temperature of the engine; to identify a target cold start control mode based on the state of charge or the lubricating oil temperature; to control the operating status of at least one of the following according to the target cold start control mode: the solenoid valve switch, the heat exchanger water inlet pipe, the heat exchanger, the drive motor water outlet pipe, the drive motor water inlet pipe, and the heat exchanger water outlet pipe, and to detect whether the vehicle meets the engine starting conditions; and to control the engine to start when the vehicle meets the engine starting conditions.

[0052] In this embodiment, for ease of description, the following description will focus on the engine cold start device for identifying hybrid vehicles.

[0053] Because existing technologies suffer from low engine oil temperature during cold starts, resulting in low warm-up efficiency, this application provides a solution. This solution employs a method that identifies a target cold start control mode by acquiring the battery's state of charge (SBC) and the engine's lubricating oil temperature. Based on this mode, it controls the operating status of at least one of the following: solenoid valve switch, heat exchanger inlet pipe, heat exchanger, drive motor outlet pipe, drive motor inlet pipe, and heat exchanger outlet pipe. This method detects whether the vehicle meets the engine starting conditions and controls engine start when they do. This solves the problem in existing hybrid vehicle engines where the lack of precise control logic based on battery SBC and oil temperature during cold starts leads to improper starting timing, low energy efficiency, and significant engine wear. Compared to existing technologies, by combining battery SBC and oil temperature to determine the cold start control mode, the operating status of relevant components can be specifically adjusted, enabling the engine to start under suitable conditions. This optimizes the engine cold start process, improves energy efficiency, and reduces engine wear during cold starts.

[0054] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone; or an electronic device capable of performing the above functions, an engine cold start device for hybrid vehicles, or an engine cold start system. The following description uses an engine cold start system as an example to illustrate this embodiment and the subsequent embodiments.

[0055] Based on this, embodiments of this application provide a method for cold starting the engine of a hybrid vehicle, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the engine cold start method for hybrid vehicles according to this application.

[0056] In this embodiment, the engine cold start method of the hybrid vehicle includes steps S10 to S40:

[0057] Step S10: Obtain the battery's state of charge and the engine's lubricating oil temperature;

[0058] It should be noted that the state of charge (SCC) of a battery refers to the percentage of its current remaining charge relative to its rated total capacity, providing a direct indication of the battery's remaining energy level. In this embodiment, the SCC value typically ranges from 0% to 100%, where 0% indicates a fully discharged battery and 100% indicates a fully charged battery. This parameter is the core basis for determining whether to start the engine to recharge the battery. For example, when the SCC is low, it may be necessary to start the engine to generate electricity to supplement the battery's charge, while when the SCC is high, battery energy can be utilized first.

[0059] Engine lubricating oil temperature refers to the real-time temperature of the oil used to lubricate various moving parts inside the engine. This temperature directly affects the oil's viscosity and lubrication performance. In this embodiment, when the oil temperature is too low, the oil viscosity will increase significantly, resulting in poor oil flow and an inability to quickly reach the various friction pairs of the engine, potentially causing wear on components during cold starts. When the oil temperature reaches a suitable range, the viscosity is moderate, enabling the formation of a stable oil film and effectively reducing frictional resistance during engine operation.

[0060] Reference Figure 2 , Figure 2 This is a schematic diagram of the engine cold start system structure of the first embodiment of the engine cold start method for hybrid vehicles of this application.

[0061] like Figure 2 As shown, the engine cold start system includes an engine 1, a drive motor 2, a drive motor radiator 3, a drive motor water pump 4, a solenoid valve 5, an engine oil pan 11, a heat exchanger 12, a drive motor water outlet pipe 100, a drive motor water inlet pipe 200, a heat exchanger water inlet pipe 300, and a heat exchanger water outlet pipe 400. The engine 1 includes an engine oil pan 11, which houses a heat exchanger 12. The engine 1 is connected to the heat exchanger inlet pipe 300 and the heat exchanger outlet pipe 400. The heat exchanger inlet pipe 300 is equipped with a solenoid valve 5, which has a switch. The heat exchanger inlet pipe 300 is connected to the drive motor outlet pipe 100, and the heat exchanger outlet pipe 400 is connected to the drive motor inlet pipe 200. The drive motor 2 is connected to the drive motor outlet pipe 100, the drive motor inlet pipe 200, and the drive motor water pump 4. The drive motor water pump 4 is connected to the drive motor radiator 3.

[0062] In this embodiment, the engine 1 includes an engine oil pan 11, which contains a heat exchanger 12. The cooling water passage of the heat exchanger is connected to the outside of the oil pan, and inlet and outlet water ports are provided on the outside of the oil pan. The engine lubrication system is connected to the engine oil pan 11 and the internal lubrication passages of the engine. It draws lubricating oil from the inside of the oil pan through an oil pump and delivers it to the various lubrication passages of the engine. The lubrication system also has an oil temperature and pressure sensor to monitor the temperature and pressure of the oil. The drive motor 2 includes a drive motor cooling system, a drive motor radiator 3 and its connecting pipes. The drive motor water pump 4 drives the internal coolant of the drive motor to flow. The cooling pipes connect the drive motor 2 and the drive motor radiator 3 to form a loop, and the drive motor radiator 3 cools the coolant. The inlet and outlet water ports of the engine oil pan heat exchanger are connected to the outlet water pipe and inlet water pipe of the drive motor through the cooling pipes, respectively, to form a cooling loop. The heat exchanger cooling pipes have a solenoid valve 5, which can control the opening and closing of the loop by switching the solenoid valve 5 on and off.

[0063] Step S20: Identify the target cold start control mode based on the state of charge or the lubricating oil temperature;

[0064] It should be noted that the target cold start control mode refers to a specific control strategy determined based on the battery's state of charge or the engine's lubricating oil temperature for the engine cold start process. This strategy guides the subsequent adjustment of the operating status of components such as solenoid valve switches, pipelines, and heat exchangers. In this embodiment, the target cold start control mode mainly includes an oil preheating mode and a preheating completion mode, with different modes corresponding to different component control logic.

[0065] Understandably, the control module retrieves preset first state of charge (SOC) thresholds and oil temperature thresholds. The SOC threshold is used to determine whether battery charge requires preheating, and the oil temperature threshold is used to determine whether the oil level is within acceptable limits. The actual SOC is then compared to the SOC threshold, and the actual oil temperature is also compared to the oil temperature threshold. If the detected SOC is lower than the SOC threshold, the target cold start control mode is preferentially identified as the oil preheating mode. If the detected oil temperature is greater than or equal to the oil temperature threshold, regardless of whether the SOC is higher than the SOC threshold, the target cold start control mode is identified as the preheating completed mode.

[0066] In one feasible implementation, step S20 may include steps S21 to S23:

[0067] Step S21: Obtain the first state of charge threshold and the oil temperature threshold;

[0068] It should be noted that the first state of charge threshold is a pre-set critical value for the remaining battery charge used to determine whether the oil preheating mode needs to be activated. This threshold is determined based on the rated capacity of the hybrid vehicle battery, the engine starting power consumption, and the energy required for oil preheating. In this embodiment, the value of the first state of charge threshold is typically higher than the second state of charge threshold.

[0069] The engine oil temperature threshold is a pre-set critical temperature value used to determine whether the engine oil has reached a suitable lubrication state. This threshold is determined based on the viscosity characteristics of the lubricating oil used in the engine, low-temperature start requirements, and component lubrication needs.

[0070] Step S22: When the state of charge is detected to be less than the first state of charge threshold, the target cold start control mode is identified as the oil preheating mode.

[0071] The oil preheating mode is a control mode that is identified when the actual state of charge is less than the first state of charge threshold. Its purpose is to heat the engine lubricating oil by using the high-temperature coolant generated by the drive motor to heat the engine oil to a suitable range by opening the heat exchange pipeline.

[0072] Understandably, when the detected state of charge (SBC) is below the first SBC threshold, the target cold start control mode is identified as the oil preheating mode. The control module compares the actual SBC with the first SBC threshold. If the actual SBC is less than the first SBC threshold, it determines that the battery power is insufficient and oil preheating is needed to reduce wear during subsequent engine starts. Therefore, the target cold start control mode is directly identified as the oil preheating mode.

[0073] Step S23: When the lubricating oil temperature is detected to be greater than or equal to the oil temperature threshold, the target cold start control mode is identified as the preheating completion mode.

[0074] The preheating completion mode is a control mode that is identified when the actual lubricating oil temperature is greater than or equal to the oil temperature threshold. Its purpose is to stop the oil preheating process, cut off the heat exchange pipeline, restore the normal cooling of the drive motor, and prepare for subsequent testing of engine starting conditions.

[0075] Understandably, when the detected lubricating oil temperature is greater than or equal to the oil temperature threshold, the target cold start control mode is identified as the preheating completion mode. The control module compares the actual lubricating oil temperature with the retrieved oil temperature threshold. If the actual oil temperature is greater than or equal to the oil temperature threshold, it is determined that the current oil lubrication performance has met the standard, and no further preheating is required. Therefore, the target cold start control mode is identified as the preheating completion mode.

[0076] Step S30: Control the operating status of at least one of the following according to the target cold start control mode: the solenoid valve switch, the heat exchanger water inlet pipe, the heat exchanger, the drive motor water outlet pipe, the drive motor water inlet pipe, and the heat exchanger water outlet pipe, and detect whether the vehicle meets the engine start conditions.

[0077] It should be noted that the solenoid valve switch is an electrically controlled valve installed on the heat exchanger's inlet water pipe. It is used to control the opening and closing of the heat exchanger's inlet water pipe, thereby regulating whether high-temperature coolant enters the heat exchanger. In this embodiment, the solenoid valve switch opens or closes by receiving an electrical signal from the control module. When open, the heat exchanger's inlet water pipe is open, allowing high-temperature coolant to flow into the heat exchanger; when closed, the heat exchanger's inlet water pipe is closed, preventing high-temperature coolant from entering the heat exchanger. Its operating state directly determines whether the heat exchange process starts.

[0078] The heat exchanger inlet pipe connects the drive motor outlet pipe to the heat exchanger, and is used to transport the high-temperature coolant in the drive motor outlet pipe to the heat exchanger. In this embodiment, one end of the pipe is connected to the drive motor outlet pipe, and the other end is connected to the heat exchanger inlet. A solenoid valve switch is installed on the pipe, and its operation is controlled by the solenoid valve switch. It is the necessary channel for the high-temperature coolant to enter the heat exchanger.

[0079] A heat exchanger is a heat transfer component located inside an engine, used to achieve heat exchange between the high-temperature coolant and the engine lubricating oil. In this embodiment, the heat exchanger has isolated coolant and oil passages inside. When the high-temperature coolant flows through the coolant passages, it transfers heat to the lubricating oil flowing through the oil passages, thereby increasing the oil temperature. Its heat exchange efficiency directly affects the speed and effect of oil preheating.

[0080] The drive motor outlet water pipe is a conduit connecting the drive motor and the heat exchanger inlet water pipe, used to discharge the high-temperature coolant generated during drive motor operation. In this embodiment, one end of the pipe is connected to the coolant outlet of the drive motor, and the other end can be selectively connected to the heat exchanger inlet water pipe or the drive motor radiator via a solenoid valve switch. Its main function is to carry away the heat generated by the drive motor through the coolant, providing a medium for subsequent heat dissipation or waste heat utilization.

[0081] The drive motor inlet pipe is a conduit connecting the heat exchanger outlet pipe and the drive motor, used to return the cooled cryogenic coolant to the drive motor. In this embodiment, one end of the pipe is connected to the outlet of the heat exchanger outlet pipe, and the other end is connected to the coolant inlet of the drive motor. Its operating status determines whether the cryogenic coolant can flow back to the drive motor smoothly, ensuring the continuous cooling of the drive motor.

[0082] The heat exchanger outlet pipe is a conduit connecting the heat exchanger and the drive motor inlet pipe, used to return the cooled coolant, after heat exchange, to the drive motor inlet pipe. In this embodiment, one end of the pipe is connected to the heat exchanger outlet, and the other end is connected to the drive motor inlet pipe. Its main function is to guide the cooled coolant, after heat exchange, out of the heat exchanger so that it can re-enter the cooling cycle of the drive motor, preventing coolant from stagnating inside the heat exchanger.

[0083] Engine starting conditions refer to a series of preset standards for determining whether a vehicle meets the requirements for starting the engine. In this embodiment, these mainly include whether the lubricating oil temperature reaches the oil temperature threshold and whether the state of charge (SBC) is less than the second SBC threshold, where the second SBC threshold is less than the first SBC threshold. The vehicle is deemed to meet the engine starting conditions only when the oil temperature is greater than or equal to the oil temperature threshold and the SBC is less than the second SBC threshold, ensuring that the engine starts under conditions of good lubrication and battery charging.

[0084] Understandably, the operating status of the solenoid valve switch, heat exchanger, and related pipelines is adjusted based on the identified target cold start control mode. If the target mode is the oil preheating mode, the solenoid valve switch is in the open state, allowing the high-temperature coolant in the drive motor outlet pipe to enter the heat exchanger through the heat exchanger inlet pipe and exchange heat with the lubricating oil in the engine. At the same time, the heat exchanger outlet pipe and the drive motor inlet pipe are kept unobstructed to ensure that the low-temperature coolant after heat exchange can flow back to the drive motor. If the target mode is the preheating completion mode, the solenoid valve switch is in the closed state, cutting off the connection between the drive motor outlet pipe and the heat exchanger inlet pipe, allowing the high-temperature coolant to flow directly into the drive motor inlet pipe through the drive motor outlet pipe, preventing coolant from continuing to enter the heat exchanger. While adjusting the operating status of the above components, the lubricating oil temperature and state of charge are continuously collected and compared with the preset oil temperature threshold and the second state of charge threshold. If the lubricating oil temperature is detected to be greater than or equal to the oil temperature threshold and the state of charge is less than the second state of charge threshold, the vehicle is determined to meet the engine starting conditions. If not, the current operating status of the components is monitored and maintained until the conditions are met or the operating conditions change.

[0085] In one feasible implementation, step S30 may include: when the target cold start control mode is the oil preheating mode, controlling the solenoid valve switch to be in the open state, so that the high temperature coolant in the drive motor outlet pipe enters the heat exchanger through the heat exchanger inlet pipe and exchanges heat with the lubricating oil in the engine.

[0086] Understandably, when the target cold start control mode is identified as the engine oil preheating mode, the control module sends an opening command to the solenoid valve switch. The solenoid valve switch opens, switching the heat exchanger inlet water pipe from a blocked state to an open state. At this time, the high-temperature coolant in the drive motor outlet water pipe is no longer blocked and will continue to flow along the heat exchanger inlet water pipe, entering the coolant passage inside the heat exchanger through the heat exchanger's inlet interface.

[0087] The high-temperature coolant entering the coolant passages will transfer heat with the engine lubricating oil flowing through the heat exchanger's oil passages. The heat from the high-temperature coolant is transferred to the cooler lubricating oil via the heat exchanger, causing the oil temperature to gradually rise. During this process, the control module continuously monitors the lubricating oil temperature changes to ensure a stable rise until the preset oil temperature threshold is reached. Simultaneously, to ensure heat exchange efficiency, the high-temperature coolant maintains a certain flow rate within the coolant passages. This rate is controlled by the water pump speed in the drive motor's cooling circuit, preventing insufficient heat exchange due to excessively slow flow or ineffective heat transfer due to excessively fast flow.

[0088] By controlling the solenoid valve switch to open in oil preheating mode, the high-temperature coolant from the drive motor's outlet pipe enters the heat exchanger to exchange heat with the lubricating oil. This fully utilizes the waste heat generated by the drive motor, eliminating the need for additional battery power or engine fuel to heat the oil, significantly improving energy efficiency and reducing unnecessary energy waste. Simultaneously, the indirect heat exchange via the heat exchanger ensures a stable rise in oil temperature, preventing localized overheating and oil performance degradation. This ensures the oil maintains good lubrication performance once it reaches the appropriate temperature, reducing friction and wear during engine start-up and extending engine life. Furthermore, the entire control process is achieved solely through the on / off switching of the solenoid valve, resulting in simple, reliable control logic, fast response, and rapid initiation of the oil preheating process, shortening engine cold start preparation time.

[0089] In one feasible implementation, step S30 may further include: when the target cold start control mode is the preheating completion mode, controlling the solenoid valve to operate in the closed state, cutting off the connection between the drive motor outlet pipe and the heat exchanger inlet pipe, so that the high temperature coolant flows into the drive motor inlet pipe through the drive motor outlet pipe.

[0090] When the target cold start control mode is identified as the preheating completion mode, the solenoid valve closes, cutting off the fluid passage between the drive motor outlet pipe and the heat exchanger inlet pipe. At this time, no new high-temperature coolant flows into the heat exchanger inlet pipe, and the heat exchanger also stops exchanging heat with the engine lubricating oil to prevent the oil temperature from becoming too high due to continuous heating.

[0091] The high-temperature coolant in the drive motor outlet pipe, unable to enter the heat exchanger inlet pipe, flows directly into the drive motor inlet pipe via a pre-set backup path. The high-temperature coolant then flows back into the drive motor through the drive motor inlet pipe, contacts the various heat-generating components of the drive motor, absorbs the new heat generated by the drive motor's operation, and then flows out again through the drive motor outlet pipe, continuously dissipating heat for the drive motor.

[0092] In one feasible implementation, step S30 may further include steps S31 to S32:

[0093] Step S31: Obtain the second state of charge threshold and the oil temperature threshold, wherein the first state of charge threshold is greater than the second state of charge threshold;

[0094] It should be noted that the second state-of-charge threshold is a pre-set critical value used to determine whether the battery needs to be recharged by starting the engine. Its core function is to form a dual judgment standard for engine starting together with the engine oil temperature threshold. In this embodiment, the value of the second state-of-charge threshold is less than the first state-of-charge threshold. For example, if the first state-of-charge threshold is set to 40%, the second state-of-charge threshold can be set to 30%. The setting of this threshold is based on a comprehensive consideration of the minimum energy consumption required for engine starting, battery discharge protection requirements, and the vehicle's basic power consumption requirements. When the actual state of charge of the battery is lower than this threshold, it indicates that the remaining battery power is insufficient to meet the subsequent normal operation of the vehicle, and the engine is started to generate electricity to supplement power.

[0095] Step S32: When the lubricating oil temperature is detected to be greater than or equal to the oil temperature threshold and the state of charge is less than the second state of charge threshold, it is determined that the vehicle meets the engine starting conditions.

[0096] Understandably, when the engine oil temperature is detected to be greater than or equal to the engine oil temperature threshold and the state of charge (SBC) is less than the second SBC threshold, the vehicle is determined to meet the engine starting conditions. The control module first reads the continuously collected real-time engine oil temperature data and compares it with the engine oil temperature threshold to determine if the oil temperature meets the standard. Simultaneously, it reads the continuously collected real-time SBC data and compares it with the second SBC threshold to determine if the battery needs recharging. If both conditions are met—that is, the engine oil temperature is greater than or equal to the engine oil temperature threshold and the SBC is less than the second SBC threshold—the control module generates a determination that the vehicle meets the engine starting conditions and transmits this result to the subsequent engine starting control unit. If either condition is not met, the vehicle is determined not to meet the engine starting conditions, and the control module continues to monitor the changes in both parameters until both conditions are met simultaneously.

[0097] Step S40: When the vehicle meets the engine starting conditions, control the engine to start.

[0098] It is understandable that when the vehicle meets the engine starting conditions, the engine starts and drives the generator to generate electricity. At this time, the engine oil temperature has reached the ideal state, which can enable the engine to reach the ideal operating conditions, reduce the energy consumed in heating the oil, and maximize the utilization of the heat from engine combustion, thereby reducing engine fuel consumption and emissions.

[0099] This embodiment provides a method for cold starting the engine of a hybrid vehicle. By acquiring the battery state of charge and the engine lubricating oil temperature, and identifying the target cold start control mode based on these parameters, it solves the technical problems of poor lubrication performance caused by low oil temperature during engine cold start and the need for timely recharging when the battery is low. It achieves the beneficial effects of improving engine starting efficiency, reducing wear, extending engine life, optimizing energy utilization, and reducing fuel consumption and emissions.

[0100] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to that in the first embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 3 Before step S30, the cold start method for the engine of the hybrid vehicle further includes steps S28 to S29:

[0101] Step S28: When the state of charge is greater than or equal to the first state of charge threshold, the vehicle is determined to be in a normal driving state.

[0102] It should be noted that normal driving condition refers to the vehicle's operation when the battery is fully charged and the engine does not need to be started or the engine oil preheated, relying on the drive motor for propulsion. In this embodiment, the core requirement for the vehicle in this state is to ensure the stable operation of the drive motor. Therefore, it is necessary to focus on controlling the operating status of the drive motor and its associated cooling components to prevent the drive motor from overheating due to continuous operation, and to prepare for subsequent engine cooling.

[0103] Understandably, when the state of charge (SBC) is greater than or equal to the first SBC threshold, the vehicle is determined to be in normal driving condition. The control module reads continuously collected real-time battery SBC data and simultaneously retrieves the pre-stored first SBC threshold, comparing the actual SBC value with the first SBC threshold. If the actual SBC value is greater than or equal to the first SBC threshold value, it is determined that the battery has sufficient remaining charge to meet the energy needs of normal vehicle operation, and there is no need to start the engine to recharge or preheat the oil. Therefore, the vehicle is determined to be in normal driving condition.

[0104] Step S29: Control the operating status of the drive motor, the drive motor water pump, the drive motor radiator, the drive motor water outlet pipe, and the drive motor water inlet pipe to complete the heat dissipation of the drive motor.

[0105] Understandably, the control module manages the operation of the drive motor, drive motor water pump, drive motor radiator, drive motor outlet water pipe, and drive motor inlet water pipe to cool the drive motor. After confirming the vehicle is in normal driving condition, the control module first sends a drive command to the drive motor, causing it to output corresponding power based on the driver's acceleration or deceleration, thus driving the vehicle. Simultaneously, to prevent the drive motor from overheating due to continuous operation, the control module sends a start command to the drive motor water pump. Upon receiving the command, the water pump begins operation, circulating coolant in the drive motor cooling circuit.

[0106] After absorbing heat from the drive motor, the coolant becomes high-temperature coolant, which flows into the drive motor radiator through the drive motor outlet pipe. Inside the radiator, the high-temperature coolant exchanges heat with the air, dissipating the heat and cooling down to a low-temperature coolant. This coolant then flows back into the drive motor through the drive motor inlet pipe, absorbing heat again to form a continuous cooling cycle. During this process, the control module monitors the drive motor temperature in real time. If the temperature is below the preset normal range, the drive motor water pump operates at a low speed to maintain basic cooling. If the temperature is above the preset normal range, the drive motor water pump speed is increased, and the radiator cooling fan is activated to enhance heat dissipation, ensuring the drive motor temperature remains stable within a safe range.

[0107] In one feasible implementation, step S29 may include steps S291 to S292:

[0108] Step S291: Control the start of the drive motor water pump to drive the flow of coolant through the drive motor water pump, so that the high temperature coolant generated by the operation of the drive motor enters the drive motor radiator through the drive motor outlet pipe.

[0109] Understandably, the system starts the drive motor water pump to drive the flow of coolant, allowing the high-temperature coolant generated by the drive motor to enter the drive motor radiator through the drive motor's outlet pipe. After confirming the vehicle is in normal driving condition, the control module sends a start command to the drive motor water pump. Upon receiving the command, the internal motor drives the impeller to rotate, and the resulting pressure difference forces the coolant in the cooling circuit to flow. At this time, the drive motor, having generated heat from continuous operation, transfers this heat to the coolant channels inside the motor through heat conduction, raising the temperature of the flowing coolant and creating high-temperature coolant. Driven by the drive motor water pump, this high-temperature coolant flows from the drive motor's coolant outlet into the drive motor's outlet pipe, flows directionally along the pipe, and finally enters the coolant inlet of the drive motor radiator through the pipe interface, completing the high-temperature coolant delivery process.

[0110] Step S292: When the coolant dissipates heat in the drive motor radiator, a low-temperature coolant is obtained. The low-temperature coolant flows back to the drive motor through the drive motor inlet pipe to complete the heat dissipation of the drive motor.

[0111] Understandably, as the coolant dissipates heat within the drive motor radiator, it becomes low-temperature coolant. This low-temperature coolant then flows back into the drive motor via the drive motor inlet pipe, completing the cooling process. The high-temperature coolant, upon entering the drive motor radiator, flows slowly along the internal channels, making full contact with the metal fins. The heat carried by the high-temperature coolant is transferred to the surrounding air through the fins, achieving heat dissipation. If the high-temperature coolant temperature is still high, the control module will simultaneously activate the radiator's cooling fan, accelerating the airflow through the fins, improving heat exchange efficiency, and rapidly lowering the coolant temperature until it becomes low-temperature coolant. This low-temperature coolant flows out of the radiator outlet and into the drive motor inlet pipe, flowing along the pipe to the drive motor's coolant inlet, and then back into the drive motor's internal coolant channels. There, it absorbs the heat generated by the drive motor again, continuously cooling it and completing one cycle of drive motor cooling.

[0112] This embodiment provides a method for cold starting the engine of a hybrid vehicle. By determining that the vehicle is in normal driving state when the battery state of charge is greater than or equal to a first state of charge threshold, and controlling the operating state of the drive motor and its cooling system components to complete the heat dissipation of the drive motor, this method solves the technical problem of how to effectively manage the thermal energy of the drive motor when the battery is fully charged, avoid overheating and ensure its stable operation. This achieves the beneficial effects of improving energy utilization efficiency, extending the service life of the drive motor and optimizing the overall performance of the vehicle.

[0113] For example, to help understand the implementation process of the hybrid vehicle engine cold start method obtained by combining this embodiment with the above embodiment one, please refer to... Figure 4 , Figure 4 A simplified flowchart of a cold start method for a hybrid vehicle engine is provided, specifically:

[0114] The process begins in the initial state, with solenoid valve 5 closed, the vehicle fully charged, and the electric drive coolant circuit normally connected. The coolant carries away heat through the electric drive, which is then dissipated by the radiator. Next, it checks if the battery SOC is less than S1. If so, an opening control command is sent to solenoid valve 5. Upon execution, solenoid valve 5 opens. Then, it checks if the engine oil temperature t has reached a preset value, which is set through calibration. If the engine oil temperature reaches the preset value, a closing control command is sent to control valve 5. Afterward, it checks if the battery SOC is less than S2, where S1 is greater than S2. The values ​​of S1 and S2 are set through calibration. If the battery SOC is less than S2, the engine starts.

[0115] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the engine cold start method of the hybrid vehicle of this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0116] This application also provides a cold start device for the engine of a hybrid vehicle, please refer to... Figure 5 The engine cold start device of the hybrid vehicle includes:

[0117] The data acquisition module 10 is used to acquire the state of charge of the battery and the lubricating oil temperature of the engine;

[0118] The pattern recognition module 20 is used to identify the target cold start control mode based on the state of charge or the lubricating oil temperature;

[0119] The status control module 30 is used to control the operating status of at least one of the solenoid valve switch, heat exchanger inlet pipe, heat exchanger, drive motor outlet pipe, drive motor inlet pipe and heat exchanger outlet pipe according to the target cold start control mode, and to detect whether the vehicle meets the engine start conditions.

[0120] The engine start module 40 is used to control the engine to start when the vehicle meets the engine start conditions.

[0121] The hybrid vehicle engine cold start device provided in this application, employing the hybrid vehicle engine cold start method described in the above embodiments, can solve the technical problem of low warm-up efficiency caused by excessively low engine oil temperature during the cold start phase. Compared with the prior art, the beneficial effects of the hybrid vehicle engine cold start device provided in this application are the same as those of the hybrid vehicle engine cold start method provided in the above embodiments, and other technical features in the hybrid vehicle engine cold start device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0122] In one embodiment, the state control module 30 is further configured to control the solenoid valve switch to be in the open state when the target cold start control mode is the oil preheating mode, so that the high-temperature coolant in the drive motor outlet pipe enters the heat exchanger through the heat exchanger inlet pipe and exchanges heat with the lubricating oil in the engine.

[0123] In one embodiment, the state control module 30 is further configured to control the solenoid valve to be in a closed state when the target cold start control mode is the preheating completion mode, thereby cutting off the connection between the drive motor outlet pipe and the heat exchanger inlet pipe, so that the high-temperature coolant flows into the drive motor inlet pipe through the drive motor outlet pipe.

[0124] In one embodiment, the pattern recognition module 20 is further configured to acquire a first state of charge threshold and an oil temperature threshold; when the state of charge is detected to be less than the first state of charge threshold, the target cold start control mode is identified as an oil preheating mode; when the lubricating oil temperature is detected to be greater than or equal to the oil temperature threshold, the target cold start control mode is identified as a preheating completion mode.

[0125] In one embodiment, the state control module 30 is further configured to acquire a second state of charge threshold and an oil temperature threshold, wherein the first state of charge threshold is greater than the second state of charge threshold; when the lubricating oil temperature is detected to be greater than or equal to the oil temperature threshold and the state of charge is less than the second state of charge threshold, it is determined that the vehicle meets the engine starting conditions.

[0126] In one embodiment, the state control module 30 is further configured to determine that the vehicle is in a normal driving state when the state of charge is greater than or equal to a first state of charge threshold; and to control the operating state of the drive motor, the drive motor water pump, the drive motor radiator, the drive motor outlet pipe and the drive motor inlet pipe to complete the cooling of the drive motor.

[0127] In one embodiment, the state control module 30 is further configured to control the start of the drive motor water pump, so as to drive the flow of coolant through the drive motor water pump, so that the high-temperature coolant generated by the operation of the drive motor enters the drive motor radiator through the drive motor outlet pipe; when the coolant completes heat dissipation in the drive motor radiator, a low-temperature coolant is obtained, wherein the low-temperature coolant flows back to the drive motor through the drive motor inlet pipe to complete the heat dissipation of the drive motor.

[0128] This application provides a cold start device for the engine of a hybrid vehicle. The cold start device for the engine of a hybrid vehicle includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the cold start method for the engine of a hybrid vehicle in the above embodiment 1.

[0129] The following is for reference. Figure 6 This document illustrates a structural schematic diagram of an engine cold start device suitable for implementing the embodiments of this application for a hybrid vehicle. The engine cold start device for a hybrid vehicle in the embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 6 The engine cold start device for the hybrid vehicle shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.

[0130] like Figure 6As shown, the engine cold start device of a hybrid vehicle may include a processing unit 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in ROM (Read Only Memory) 1002 or a program loaded from storage device 1003 into RAM (Random Access Memory) 1004. RAM 1004 also stores various programs and data required for the operation of the engine cold start device of the hybrid vehicle. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via bus 1005. Input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input devices 1007 including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices 1008 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 1003 including, for example, magnetic tapes, hard disks, etc.; and communication devices 1009. Communication device 1009 allows the hybrid vehicle's engine cold start device to communicate wirelessly or wiredly with other devices to exchange data. Although the figure shows a hybrid vehicle's engine cold start device with various systems, it should be understood that it is not required to implement or possess all the systems shown. More or fewer systems may be implemented or possessed alternatively.

[0131] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0132] The hybrid vehicle engine cold start device provided in this application, employing the hybrid vehicle engine cold start method described in the above embodiments, can solve the technical problem of low warm-up efficiency caused by excessively low engine oil temperature during the cold start phase. Compared with the prior art, the beneficial effects of the hybrid vehicle engine cold start device provided in this application are the same as those of the hybrid vehicle engine cold start method provided in the above embodiments, and other technical features of this hybrid vehicle engine cold start device are the same as those disclosed in the previous embodiment method, and will not be repeated here.

[0133] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0134] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0135] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the engine cold start method of the hybrid vehicle in the above embodiments.

[0136] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections with one or more wires, portable computer disks, hard disks, RAM (Random Access Memory), ROM (Read Only Memory), Erasable Programmable Read Only Memory (EPROM), optical fiber, CD-ROM (CD-Read Only Memory), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0137] The aforementioned computer-readable storage medium may be included in the engine cold start device of the hybrid vehicle; or it may exist independently and not be installed in the engine cold start device of the hybrid vehicle.

[0138] The aforementioned computer-readable storage medium carries one or more programs that, when executed by the engine cold start device of the hybrid vehicle, cause the engine cold start device of the hybrid vehicle to: acquire the state of charge of the battery and the lubricating oil temperature of the engine; identify a target cold start control mode based on the state of charge or the lubricating oil temperature; control the operating state of at least one of the following according to the target cold start control mode: the solenoid valve switch, the heat exchanger inlet pipe, the heat exchanger, the drive motor outlet pipe, the drive motor inlet pipe, and the heat exchanger outlet pipe; and detect whether the vehicle meets the engine starting conditions; and control the engine to start when the vehicle meets the engine starting conditions.

[0139] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including LAN (Local Area Network) or WAN (Wide Area Network)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0140] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0141] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0142] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the engine cold start method of the hybrid vehicle described above. This solves the technical problem of low engine oil temperature leading to low warm-up efficiency during the cold start phase. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the engine cold start method of the hybrid vehicle provided in the above embodiments, and will not be repeated here.

[0143] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the engine cold start method for a hybrid vehicle as described above.

[0144] The computer program product provided in this application can solve the technical problem of low engine oil temperature leading to low warm-up efficiency during the cold start phase. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as those of the engine cold start method for hybrid vehicles provided in the above embodiments, and will not be repeated here.

[0145] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A method for cold starting the engine of a hybrid vehicle, characterized in that, The method is applied to an engine cold start system, which includes: a heat exchanger inlet pipe, a heat exchanger, a drive motor outlet pipe, a drive motor inlet pipe, a heat exchanger outlet pipe, and an engine. The engine is equipped with a heat exchanger, and the engine is connected to the heat exchanger inlet pipe and the heat exchanger outlet pipe respectively. A solenoid valve switch is provided on the heat exchanger inlet pipe. The heat exchanger inlet pipe is connected to the drive motor outlet pipe, and the heat exchanger outlet pipe is connected to the drive motor inlet pipe. The method includes: Obtain the battery's state of charge and the engine's lubricating oil temperature; The target cold start control mode is identified based on the state of charge or the lubricating oil temperature. According to the target cold start control mode, control the operating status of at least one of the following: the solenoid valve switch, the heat exchanger inlet pipe, the heat exchanger, the drive motor outlet pipe, the drive motor inlet pipe, and the heat exchanger outlet pipe, and detect whether the vehicle meets the engine start conditions. When the vehicle meets the engine starting conditions, the engine is controlled to start.

2. The method as described in claim 1, characterized in that, The steps for controlling the operating status of at least one of the following according to the target cold start control mode: the solenoid valve switch, the heat exchanger inlet pipe, the heat exchanger, the drive motor outlet pipe, the drive motor inlet pipe, and the heat exchanger outlet pipe. When the target cold start control mode is the oil preheating mode, the solenoid valve switch is controlled to be in the open state so that the high-temperature coolant in the drive motor outlet pipe enters the heat exchanger through the heat exchanger inlet pipe and exchanges heat with the lubricating oil in the engine.

3. The method as described in claim 1, characterized in that, The step of controlling the operating state of at least one of the following according to the target cold start control mode: the solenoid valve switch, the heat exchanger inlet pipe, the heat exchanger, the drive motor outlet pipe, the drive motor inlet pipe, and the heat exchanger outlet pipe; further includes: When the target cold start control mode is the preheating completion mode, the solenoid valve is controlled to be in the closed state, cutting off the connection between the drive motor outlet pipe and the heat exchanger inlet pipe, so that the high temperature coolant flows into the drive motor inlet pipe through the drive motor outlet pipe.

4. The method as described in claim 1, characterized in that, The step of identifying the target cold start control mode based on the state of charge or the lubricating oil temperature includes: Obtain the first state of charge threshold and the oil temperature threshold; When the state of charge is detected to be less than the first state of charge threshold, the target cold start control mode is identified as the oil preheating mode. When the lubricating oil temperature is detected to be greater than or equal to the oil temperature threshold, the target cold start control mode is identified as the preheating completion mode.

5. The method as described in claim 1, characterized in that, The steps to check if a vehicle meets the conditions for engine starting include: Obtain a second state of charge threshold and an oil temperature threshold, wherein the first state of charge threshold is greater than the second state of charge threshold; When the lubricating oil temperature is detected to be greater than or equal to the oil temperature threshold and the state of charge is less than the second state of charge threshold, it is determined that the vehicle meets the engine starting conditions.

6. The method as described in claim 1, characterized in that, The engine cold start system also includes a drive motor, a drive motor water pump, and a drive motor radiator. The drive motor is connected to the drive motor outlet water pipe, the drive motor inlet water pipe, and the drive motor water pump, respectively. The drive motor water pump is connected to the drive motor radiator. Before the step of identifying the target cold start control mode based on the state of charge or the lubricating oil temperature, the method further includes: When the state of charge is greater than or equal to the first state of charge threshold, the vehicle is determined to be in a normal driving state. Control the operating status of the drive motor, the drive motor water pump, the drive motor radiator, the drive motor water outlet pipe, and the drive motor water inlet pipe to complete the heat dissipation of the drive motor.

7. The method as described in claim 6, characterized in that, The steps for controlling the operating status of the drive motor, the drive motor water pump, the drive motor radiator, the drive motor outlet water pipe, and the drive motor inlet water pipe to complete the drive motor cooling include: The drive motor water pump is started to drive the coolant flow, so that the high-temperature coolant generated by the drive motor enters the drive motor radiator through the drive motor outlet pipe. When the coolant dissipates heat within the drive motor radiator, a low-temperature coolant is obtained. This low-temperature coolant then flows back into the drive motor via the drive motor inlet pipe, thus completing the heat dissipation of the drive motor.

8. A cold start device for the engine of a hybrid vehicle, characterized in that, The device includes: The data acquisition module is used to acquire the battery's state of charge and the engine's lubricating oil temperature; The pattern recognition module is used to identify the target cold start control mode based on the state of charge or the lubricating oil temperature. The status control module is used to control the operating status of at least one of the following according to the target cold start control mode: the solenoid valve switch, the heat exchanger inlet pipe, the heat exchanger, the drive motor outlet pipe, the drive motor inlet pipe, and the heat exchanger outlet pipe, and to detect whether the vehicle meets the engine start conditions. An engine starting module is used to control the engine to start when the vehicle meets the engine starting conditions.

9. A cold start device for the engine of a hybrid vehicle, characterized in that, The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the engine cold start method for a hybrid vehicle as claimed in any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the steps of the engine cold start method for a hybrid vehicle as described in any one of claims 1 to 7.

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