PHEV model thermal system heat damage control method, device and system

Abstract

The invention discloses a heat damage control method, device and system for a PHEV model heat system, and the method comprises the steps: setting an environment temperature threshold value, an engine water temperature threshold value and a turbocharging water temperature threshold value; after the engine flames out, comparison results are obtained by comparing the environment temperature with an environment temperature threshold value, comparing the engine water temperature with an engine water temperature threshold value and comparing the turbocharging water temperature with a turbocharging water temperature threshold value; determining a heat damage working condition according to a comparison result, and setting a corresponding control strategy according to the heat damage working condition; according to a control strategy, the circulation opening degree, the duty ratio, the operation time and the electric water pump flow are executed, it is guaranteed that during hot dipping, the cooling liquid and air flow is sufficient, and heat exchange between a radiator and the surrounding environment is sufficient; by optimizing the cooling principle of the turbocharging loop and the heat damage control strategy of the heat system, the heat damage problems of heat shock, cavitation and the like of the turbocharging cooling loop are effectively solved, and the service life of parts is prolonged; meanwhile, the heat damage problem of export vehicles in high-temperature areas is solved, and the system is more suitable for being used by vehicles in tropical areas.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a method, device and system for controlling thermal damage of a thermal system of a PHEV vehicle. Background Art

[0002] With the continuous development of new energy vehicles, PHEV models have emerged and gradually become the mainstream development direction. Compared with traditional fuel vehicles, PHEV models have not only turbocharged engines, but also electric motors and electric drives in the cabin; due to insufficient cabin space and overly compact layout, the air flow in the cabin is not smooth. At the same time, the front-end styling of new energy vehicles is becoming more and more novel, and the air intake grilles are getting smaller and smaller, making the heat damage problem of the cabin thermal system very prominent, which often causes user complaints. Summary of the invention

[0003] The object of the present invention is to provide a method, device and system for controlling thermal damage of a thermal system of a PHEV vehicle to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a method for controlling thermal damage of a PHEV thermal system, comprising:

[0005] Set the ambient temperature threshold, engine water temperature threshold and turbocharger water temperature threshold;

[0006] When the engine is turned off, the ambient temperature is compared with the ambient temperature threshold, the engine water temperature is compared with the engine water temperature threshold, and the turbocharger water temperature is compared with the turbocharger water temperature threshold to obtain a comparison result;

[0007] According to the comparison results, the heat damage condition is determined, and the corresponding control strategy is set according to the heat damage condition;

[0008] According to the control strategy, the cycle opening, duty cycle, operating time and electric water pump flow are executed to ensure sufficient flow of coolant and air during hot soaking and sufficient heat exchange between the radiator and the surrounding environment. Among them, based on the corresponding control strategy, the cycle opening of the thermal management large cycle, the duty cycle of the electric fan and the operating time at this duty cycle, as well as the electric water pump flow during the operating time are set.

[0009] Furthermore, setting the ambient temperature threshold, the engine water temperature threshold and the turbocharger water temperature threshold also includes:

[0010] The ambient temperature threshold is calibrated according to the ambient temperature. When the ambient temperature is greater than the ambient temperature threshold, the ambient temperature is calibrated to a high ambient temperature condition. When the ambient temperature is less than the ambient temperature threshold, the ambient temperature is calibrated to a normal ambient temperature condition.

[0011] The engine water temperature threshold is calibrated according to the engine water temperature. When the engine water temperature is greater than the engine water temperature threshold, the engine water temperature is calibrated as the engine high temperature condition. When the engine water temperature is less than the engine water temperature threshold, the engine water temperature is calibrated as the engine normal temperature condition.

[0012] The turbocharger water temperature threshold is calibrated according to the turbocharger water temperature. When the turbocharger water temperature is greater than the turbocharger water temperature threshold, the turbocharger water temperature is calibrated to the turbocharger high temperature condition. When the turbocharger water temperature is less than the turbocharger water temperature threshold, the turbocharger water temperature is calibrated to the turbocharger normal temperature condition.

[0013] Furthermore, setting a corresponding control strategy according to the heat damage condition also includes:

[0014] The heat damage working conditions include a first heat damage working condition, a second heat damage working condition, a third heat damage working condition and a fourth heat damage working condition, and the corresponding control strategies include a first control strategy, a second control strategy, a third control strategy and a fourth control strategy;

[0015] The ambient normal temperature condition, the engine high temperature condition and the turbocharger normal temperature condition form a first heat damage condition, and the first control strategy is executed according to the first heat damage condition;

[0016] The ambient normal temperature condition, the engine high temperature condition and the turbocharger high temperature condition form a second heat damage condition, and the second control strategy is executed according to the second heat damage condition;

[0017] The ambient high temperature condition, the engine normal temperature condition and the turbocharger high temperature condition form a third heat damage condition, and the third control strategy is executed according to the third heat damage condition;

[0018] The high-temperature ambient condition, the high-temperature engine condition and the high-temperature turbocharging condition form a fourth heat-damage condition, and the fourth control strategy is executed according to the fourth heat-damage condition.

[0019] Furthermore, according to the control strategy, the cycle opening, duty cycle, operating time and electric water pump flow are executed to ensure sufficient flow of coolant and air during hot soaking, and sufficient heat exchange between the radiator and the surrounding environment, and also include:

[0020] The cycle opening includes a first cycle opening and a second cycle opening, the duty cycle includes a first duty cycle, a second duty cycle, a third duty cycle and a fourth duty cycle, the operation time includes a first operation time, a second operation time, a third operation time and a fourth operation time, and the electric water pump flow includes a first electric water pump flow, a second electric water pump flow, a third electric water pump flow and a fourth electric water pump flow;

[0021] The first control strategy executes a first cycle opening, a first duty cycle, a first operating time of the first duty cycle, and a first electric water pump flow rate during the first operating time;

[0022] The second control strategy implements a second cycle opening, a second duty cycle, a second operating time of the second duty cycle, and a second electric water pump flow rate during the second operating time;

[0023] The third control strategy implements a second cycle opening, a third duty cycle, a third operating time of the third duty cycle, and a third electric water pump flow rate during the third operating time;

[0024] The fourth control strategy executes a second cycle opening, a fourth duty cycle, a fourth operating time of the fourth duty cycle, and a fourth electric water pump flow rate during the fourth operating time;

[0025] Among them, the second cycle opening is greater than the first cycle opening, the first duty cycle is less than the second duty cycle, the second duty cycle is less than the third duty cycle, the third duty cycle is not greater than the fourth duty cycle, the first operating time is less than the second operating time, the second operating time is less than the third operating time, the third operating time is less than the fourth operating time, the first electric water pump flow is less than the second electric water pump flow, the second electric water pump flow is less than the third electric water pump flow, and the third electric water pump flow is less than the fourth electric water pump flow.

[0026] On the other hand, a PHEV vehicle thermal system thermal damage control device is provided, which uses any one of the above PHEV vehicle thermal system thermal damage control methods, including:

[0027] A setting module, used to set the ambient temperature threshold, the engine water temperature threshold and the turbocharger water temperature threshold;

[0028] A comparison module, used for comparing the ambient temperature with the ambient temperature threshold, the engine water temperature with the engine water temperature threshold, and the turbocharger water temperature with the turbocharger water temperature threshold to obtain a comparison result when the engine is turned off;

[0029] A determination module is used to determine the heat damage condition according to the comparison result and set a corresponding control strategy according to the heat damage condition;

[0030] The execution module is used to execute the cycle opening, duty cycle, operating time and electric water pump flow according to the control strategy to ensure sufficient flow of coolant and air during hot soaking and sufficient heat exchange between the radiator and the surrounding environment. Based on the corresponding control strategy, the cycle opening of the thermal management large cycle, the duty cycle of the electric fan and the operating time at this duty cycle, as well as the electric water pump flow during the operating time are set.

[0031] In another aspect, a PHEV vehicle thermal system thermal damage control system is provided, and a PHEV vehicle thermal system thermal damage control method described in any one of the above items is applied, comprising:

[0032] An engine coolant circulation loop, the engine coolant circulation loop comprising an engine, a thermal management module, a turbocharger, an electric water pump, a radiator and an expansion water tank, wherein the engine, the thermal management module, the turbocharger, the electric water pump, the radiator and the expansion water tank are connected via a cooling pipeline;

[0033] The engine exhaust circuit exhausts the radiator, engine and turbocharger through the engine exhaust circuit.

[0034] Further, the engine exhaust circuit comprises:

[0035] A radiator air return pipe, used to discharge air in the radiator;

[0036] An engine cylinder air return pipe, used to discharge the air in the engine cylinder flow channel;

[0037] The boost circuit return air pipe is used to discharge the air in the coolant flow channel of the turbocharger and connect the boost circuit return air pipe with the engine coolant circulation circuit.

[0038] Furthermore, the vehicle VCU is used to make algorithmic judgments based on the ambient temperature, the engine water temperature of the coolant in the engine coolant circulation loop, and the turbocharger water temperature of the turbocharger circuit coolant, and adopt different thermal damage control strategies to control the operation of the thermal management module, electric water pump and electric fan. Among them, the thermal management module is used to realize the opening and closing of the engine coolant circulation loop large cycle.

[0039] In another aspect, an electronic device is provided, the electronic device comprising:

[0040] one or more processors;

[0041] a storage device for storing one or more programs,

[0042] When the one or more programs are executed by the one or more processors, the one or more processors implement a method for controlling thermal damage of a thermal system of a PHEV vehicle as described in any one of the above.

[0043] On the other hand, a computer-readable storage medium is provided, on which a computer program is stored, characterized in that when the program is executed by a processor, a method for controlling thermal damage of a thermal system of a PHEV vehicle type as described in any one of the above is implemented.

[0044] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention proposes a method for controlling thermal damage of the thermal system of a PHEV vehicle, which effectively solves thermal damage problems such as thermal shock and cavitation of the turbocharger cooling circuit by optimizing the cooling principle of the turbocharger circuit and the thermal damage control strategy of the thermal system, thereby improving the service life of the parts. At the same time, the present invention also specifically considers the solution of thermal damage problems of export vehicles in high-temperature areas, and is more suitable for vehicles in tropical areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a flow chart of a method for controlling thermal damage of a thermal system of a PHEV vehicle according to an embodiment of the present invention;

[0046] Figure 2 It is a connection block diagram of a thermal system heat damage control device for a PHEV vehicle according to an embodiment of the present invention;

[0047] Figure 3 This is a schematic diagram of the connection of a thermal system heat damage control system for a PHEV vehicle according to an embodiment of the present invention;

[0048] Figure 4 A schematic diagram of the connection structure of an electronic device and a computer-readable storage medium in an embodiment of the present invention;

[0049] In the figure: 10, memory; 11, processor; 12, communication bus; 13, communication interface; 14, computer program; 15, storage medium; 16, setting module; 17, comparison module; 18, determination module; 19, execution module. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] Please refer to the attached drawings of the specification, the present invention provides a technical solution: Figure 1 As shown, a method for controlling thermal damage of a thermal system of a PHEV vehicle includes the following steps:

[0054] S102, setting an ambient temperature threshold, an engine water temperature threshold, and a turbocharger water temperature threshold;

[0055] Specifically, the ambient temperature threshold is calibrated according to the ambient temperature. When the ambient temperature is greater than the ambient temperature threshold, the ambient temperature is calibrated as a high-temperature ambient condition. When the ambient temperature is less than the ambient temperature threshold, the ambient temperature is calibrated as a normal-temperature ambient condition.

[0056] The engine water temperature threshold is calibrated according to the engine water temperature. When the engine water temperature is greater than the engine water temperature threshold, the engine water temperature is calibrated as the engine high temperature condition. When the engine water temperature is less than the engine water temperature threshold, the engine water temperature is calibrated as the engine normal temperature condition.

[0057] The turbocharger water temperature threshold is calibrated according to the turbocharger water temperature. When the turbocharger water temperature is greater than the turbocharger water temperature threshold, the turbocharger water temperature is calibrated to the turbocharger high temperature condition. When the turbocharger water temperature is less than the turbocharger water temperature threshold, the turbocharger water temperature is calibrated to the turbocharger normal temperature condition.

[0058] Preferably, the ambient temperature threshold is 45°C, the engine water temperature threshold is 110°C, and the turbocharger water temperature threshold is 115°C. The ambient temperature is set to T amb , the engine water temperature is T1, the turbocharger water temperature is T2; then T amb When <45℃, it is the normal temperature condition, T amb When T1 is higher than 45℃, it is the ambient high temperature condition; when T1 is lower than 110℃, it is the engine normal temperature condition, and when T1 is higher than 110℃, it is the engine high temperature condition; when T2 is lower than 115℃, it is the turbocharger normal temperature condition, and when T2 is higher than 115℃, it is the turbocharger high temperature condition.

[0059] S104, when the engine is turned off, comparing the ambient temperature with the ambient temperature threshold, the engine water temperature with the engine water temperature threshold, and the turbocharger water temperature with the turbocharger water temperature threshold to obtain a comparison result;

[0060] Among them, by comparing the ambient temperature with the ambient temperature threshold, the engine water temperature with the engine water temperature threshold, and the turbocharger water temperature with the turbocharger water temperature threshold, it is determined what operating conditions the ambient temperature, engine water temperature and turbocharger water temperature are respectively in.

[0061] S106, determining the heat damage working condition according to the comparison result, and setting a corresponding control strategy according to the heat damage working condition;

[0062] Specifically, the heat damage conditions include a first heat damage condition, a second heat damage condition, a third heat damage condition and a fourth heat damage condition, and the corresponding control strategies include a first control strategy, a second control strategy, a third control strategy and a fourth control strategy;

[0063] The ambient normal temperature condition, the engine high temperature condition and the turbocharger normal temperature condition form a first heat damage condition, and the first control strategy is executed according to the first heat damage condition;

[0064] The ambient normal temperature condition, the engine high temperature condition and the turbocharger high temperature condition form a second heat damage condition, and the second control strategy is executed according to the second heat damage condition;

[0065] The ambient high temperature condition, the engine normal temperature condition and the turbocharger high temperature condition form a third heat damage condition, and the third control strategy is executed according to the third heat damage condition;

[0066] The high-temperature ambient condition, the high-temperature engine condition and the high-temperature turbocharging condition form a fourth heat-damage condition, and the fourth control strategy is executed according to the fourth heat-damage condition.

[0067] Among them, through the above thermal system principles and heat damage control strategies, it is ensured that when the PHEV vehicle is in a hot soak state after being turned off, there is sufficient flow of coolant and air, and the heat exchange between the radiator and the surrounding environment is fully carried out, avoiding the situation where the turbocharger circuit does not dissipate enough heat and the temperature rises rapidly, thereby avoiding the occurrence of heat damage problems.

[0068] S108. According to the control strategy, the cycle opening, duty cycle, operating time and electric water pump flow are executed to ensure sufficient flow of coolant and air during hot soaking and sufficient heat exchange between the radiator and the surrounding environment. The cycle opening of the thermal management large cycle, the duty cycle of the electric fan and the operating time at this duty cycle, and the electric water pump flow during the operating time are set based on the corresponding control strategy.

[0069] Specifically, the cycle opening includes a first cycle opening and a second cycle opening, the duty cycle includes a first duty cycle, a second duty cycle, a third duty cycle and a fourth duty cycle, the operation time includes a first operation time, a second operation time, a third operation time and a fourth operation time, and the electric water pump flow includes a first electric water pump flow, a second electric water pump flow, a third electric water pump flow and a fourth electric water pump flow;

[0070] The first control strategy executes a first cycle opening, a first duty cycle, a first operating time of the first duty cycle, and a first electric water pump flow rate during the first operating time;

[0071] The second control strategy implements a second cycle opening, a second duty cycle, a second operating time of the second duty cycle, and a second electric water pump flow rate during the second operating time;

[0072] The third control strategy implements a second cycle opening, a third duty cycle, a third operating time of the third duty cycle, and a third electric water pump flow rate during the third operating time;

[0073] The fourth control strategy executes a second cycle opening, a fourth duty cycle, a fourth operating time of the fourth duty cycle, and a fourth electric water pump flow rate during the fourth operating time;

[0074] Among them, the second cycle opening is greater than the first cycle opening, the first duty cycle is less than the second duty cycle, the second duty cycle is less than the third duty cycle, the third duty cycle is not greater than the fourth duty cycle, the first operating time is less than the second operating time, the second operating time is less than the third operating time, the third operating time is less than the fourth operating time, the first electric water pump flow is less than the second electric water pump flow, the second electric water pump flow is less than the third electric water pump flow, and the third electric water pump flow is less than the fourth electric water pump flow.

[0075] Among them, if the ambient temperature T amb <45°C, the engine water temperature T1>110°C and the turbocharger water temperature T2<115°C, the vehicle VCU controls the thermal management module to open the first cycle opening of the large cycle, wherein the first cycle opening is preferably 80%, the electric fan runs at a first duty cycle of 50% for a first running time of 45 seconds, during which the electric water pump runs at a first electric water pump flow rate of 6L / min;

[0076] If the ambient temperature T amb <45°C, the engine water temperature T1>110°C and the turbocharger water temperature T2>115°C, the vehicle VCU controls the thermal management module to open the second cycle opening of the large cycle, wherein the second cycle opening is preferably 100%, the electric fan operates at a second duty cycle of 70% for a second operation time of 55 seconds, during which the electric water pump operates at a second electric water pump flow rate of 8L / min;

[0077] If the ambient temperature T amb≥45°C, the engine water temperature T1 is less than 110°C and the turbocharger water temperature T2 is greater than 115°C, the vehicle VCU controls the thermal management module to open the second cycle opening of the large cycle to 100%, the electric fan operates at a third duty cycle of 90% for a third operation time of 65 seconds, during which the electric water pump operates at a third electric water pump flow rate of 10L / min;

[0078] If the ambient temperature T amb ≥45°C, the engine water temperature T1>110°C and the turbocharger water temperature T2>115°C, the vehicle VCU controls the thermal management module to open the second cycle opening of the large cycle to 100%, the electric fan operates at a fourth duty cycle of 90% for a fourth operation time of 75 seconds, during which the electric water pump operates at a fourth electric water pump flow rate of 12L / min;

[0079] Through the above thermal system principles and heat damage control strategies, it is ensured that when the PHEV vehicle is in a hot soak state after being turned off, there is sufficient flow of coolant and air, and the heat exchange between the radiator and the surrounding environment is fully carried out, avoiding the situation where the turbocharger circuit does not dissipate enough heat and the temperature rises rapidly, thereby avoiding the occurrence of heat damage problems.

[0080] On the other hand, Figure 2 As shown, a PHEV vehicle thermal system thermal damage control device is provided, and a PHEV vehicle thermal system thermal damage control method described in any one of the above items is applied, comprising:

[0081] A setting module 16, used to set an ambient temperature threshold, an engine water temperature threshold, and a turbocharger water temperature threshold;

[0082] The ambient temperature threshold is calibrated according to the ambient temperature. When the ambient temperature is greater than the ambient temperature threshold, the ambient temperature is calibrated as a high-temperature ambient condition. When the ambient temperature is less than the ambient temperature threshold, the ambient temperature is calibrated as a normal-temperature ambient condition.

[0083] The engine water temperature threshold is calibrated according to the engine water temperature. When the engine water temperature is greater than the engine water temperature threshold, the engine water temperature is calibrated as the engine high temperature condition. When the engine water temperature is less than the engine water temperature threshold, the engine water temperature is calibrated as the engine normal temperature condition.

[0084] The turbocharger water temperature threshold is calibrated according to the turbocharger water temperature. When the turbocharger water temperature is greater than the turbocharger water temperature threshold, the turbocharger water temperature is calibrated to the turbocharger high temperature condition. When the turbocharger water temperature is less than the turbocharger water temperature threshold, the turbocharger water temperature is calibrated to the turbocharger normal temperature condition.

[0085] A comparison module 17 is used to compare the ambient temperature with the ambient temperature threshold, the engine water temperature with the engine water temperature threshold, and the turbocharger water temperature with the turbocharger water temperature threshold to obtain a comparison result when the engine is turned off;

[0086] Among them, by comparing the ambient temperature with the ambient temperature threshold, the engine water temperature with the engine water temperature threshold, and the turbocharger water temperature with the turbocharger water temperature threshold, it is determined what operating conditions the ambient temperature, engine water temperature and turbocharger water temperature are respectively in.

[0087] A determination module 18 is used to determine the heat damage condition according to the comparison result and set a corresponding control strategy according to the heat damage condition;

[0088] Among them, the cycle opening includes the first cycle opening and the second cycle opening, the duty cycle includes the first duty cycle, the second duty cycle, the third duty cycle and the fourth duty cycle, the operating time includes the first operating time, the second operating time, the third operating time and the fourth operating time, and the electric water pump flow includes the first electric water pump flow, the second electric water pump flow, the third electric water pump flow and the fourth electric water pump flow; the first control strategy executes the first cycle opening, the first duty cycle, the first operating time of the first duty cycle, and the first electric water pump flow within the first operating time; the second control strategy executes the second cycle opening, the second duty cycle, the second operating time of the second duty cycle, and the second electric water pump flow within the second operating time; the third control strategy executes the second cycle opening, the third duty cycle, the third operating time of the third duty cycle, and the third electric water pump flow within the third operating time; the fourth control strategy executes the second cycle opening, the fourth duty cycle, the fourth operating time of the fourth duty cycle, and the fourth electric water pump flow within the fourth operating time;

[0089] The execution module 19 is used to execute the cycle opening, duty cycle, operating time and electric water pump flow according to the control strategy to ensure sufficient flow of coolant and air during hot soaking and sufficient heat exchange between the radiator and the surrounding environment. Based on the corresponding control strategy, the cycle opening of the thermal management large cycle, the duty cycle of the electric fan and the operating time at this duty cycle, as well as the electric water pump flow during the operating time are set.

[0090] Among them, the cycle opening includes the first cycle opening and the second cycle opening, the duty cycle includes the first duty cycle, the second duty cycle, the third duty cycle and the fourth duty cycle, the operating time includes the first operating time, the second operating time, the third operating time and the fourth operating time, and the electric water pump flow includes the first electric water pump flow, the second electric water pump flow, the third electric water pump flow and the fourth electric water pump flow; the first control strategy executes the first cycle opening, the first duty cycle, the first operating time of the first duty cycle, and the first electric water pump flow within the first operating time; the second control strategy executes the second cycle opening, the second duty cycle, the second operating time of the second duty cycle, and the second electric water pump flow within the second operating time; the third control strategy executes the second cycle opening, A third duty cycle, a third operating time of the third duty cycle, and a third electric water pump flow rate within the third operating time; a fourth control strategy executes a second cycle opening, a fourth duty cycle, a fourth operating time of the fourth duty cycle, and a fourth electric water pump flow rate within the fourth operating time; wherein, the second cycle opening is greater than the first cycle opening, the first duty cycle is less than the second duty cycle, the second duty cycle is less than the third duty cycle, the third duty cycle is not greater than the fourth duty cycle, the first operating time is less than the second operating time, the second operating time is less than the third operating time, the third operating time is less than the fourth operating time, the first electric water pump flow rate is less than the second electric water pump flow rate, the second electric water pump flow rate is less than the third electric water pump flow rate, and the third electric water pump flow rate is less than the fourth electric water pump flow rate.

[0091] On the other hand, Figure 3 As shown, a PHEV vehicle thermal system thermal damage control system is provided, and a PHEV vehicle thermal system thermal damage control method described in any one of the above items is applied, comprising:

[0092] An engine coolant circulation loop, the engine coolant circulation loop comprising an engine, a thermal management module, a turbocharger, an electric water pump, a radiator and an expansion water tank, wherein the engine, the thermal management module, the turbocharger, the electric water pump, the radiator and the expansion water tank are connected via a cooling pipeline;

[0093] The engine exhaust circuit exhausts the radiator, engine and turbocharger through the engine exhaust circuit.

[0094] In the above embodiment, the engine and the turbocharger are cooled components of the engine coolant circulation loop; the electric water pump is used to drive the coolant to flow in the coolant circulation loop; the radiator, in combination with the electric fan, drives the ambient air to flow, so that the coolant inside the radiator exchanges heat with the air, and transfers the heat of the engine coolant circulation loop to the atmospheric environment; the thermal management module is controlled by the vehicle VCU and is used to realize the opening and closing of the engine coolant circulation loop; the ambient temperature sensor is used to monitor the ambient temperature T ambThe water temperature sensor is used to monitor the coolant temperature T1 in the engine coolant circulation loop and the coolant temperature T2 in the turbocharger circuit; the vehicle VCU, according to the ambient temperature T amb The coolant temperature T1 in the engine coolant circulation loop and the coolant temperature T2 in the turbocharger circuit are comprehensively determined by algorithm, and different heat damage control strategies are adopted to control the operation of the thermal management module, electric water pump and electric fan. The expansion water tank is arranged at the highest point of the thermal system of the PHEV model and is used for exhaust and water replenishment of the coolant circulation loop.

[0095] Optionally, the engine exhaust circuit comprises:

[0096] Radiator return air pipe, used to exhaust the air in the radiator;

[0097] The engine cylinder return air pipe is used to discharge the air in the engine cylinder flow channel;

[0098] The boost circuit return air pipe is used to discharge the air in the coolant flow channel of the turbocharger and connect the boost circuit return air pipe with the engine coolant circulation circuit.

[0099] In the above embodiment, the engine exhaust circuit includes a radiator return air pipe, an engine cylinder return air pipe, and a boost circuit return air pipe; the radiator, the engine, and the turbocharger are the exhaust components of the engine exhaust circuit; the radiator return air pipe is used to discharge the air in the radiator to ensure the smooth flow of coolant in the radiator core; the engine cylinder return air pipe is used to discharge the air in the engine cylinder flow channel to ensure the smooth flow of coolant in the engine cylinder; the boost circuit return air pipe is used to discharge the air in the turbocharger coolant flow channel to ensure the smooth flow of coolant in the flow channel.

[0100] Optionally, the vehicle VCU is used to make algorithmic judgments based on the ambient temperature, the engine water temperature of the coolant in the engine coolant circulation loop, and the turbocharger water temperature of the turbocharger circuit coolant, and adopt different thermal damage control strategies to control the operation of the thermal management module, electric water pump and electric fan, wherein the thermal management module is used to realize the opening and closing of the large cycle of the engine coolant circulation loop.

[0101] In the above embodiment, in order to solve the heat damage problem after the PHEV engine is turned off, the cooling principle of the PHEV engine thermal system is optimized; the return air pipe of the boost circuit is connected to the large circulation circuit; the heat damage control strategy of the whole vehicle VCU is optimized, and the whole vehicle VCU is controlled according to the ambient temperature T amb , engine water temperature T1, and turbocharger water temperature T2 for algorithm judgment.

[0102] On the other hand, Figure 4As shown, an electronic device is provided, the electronic device comprising:

[0103] One or more processors 11;

[0104] a storage device for storing one or more programs,

[0105] When the one or more programs are executed by the one or more processors 11, the one or more processors 11 implement a PHEV vehicle thermal system thermal damage control method as described in any one of the above.

[0106] Specifically, the storage device is a memory 10, a processor (CPU) 11 and a computer program 14, the computer program 14 is stored in the memory 10, and the processor 11 executes the computer program 14 to implement any one of the above-mentioned methods for controlling thermal damage of the thermal system of a PHEV vehicle. The control system also includes: a communication interface 13 and a communication bus 12, and the processor 11, the communication interface 13, and the memory 10 communicate through the communication bus 12, wherein the communication bus 12 is an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc., and if the memory 10, the processor 11, and the communication interface 13 are integrated on a chip, the memory 10, the processor 11, and the communication interface 13 can communicate with each other through an internal interface.

[0107] The processor 11 may also be a specific integrated circuit or multiple integrated circuits.

[0108] On the other hand, Figure 4 As shown, a computer-readable storage medium 15 is provided, on which a computer program 14 is stored. When the program is executed by a processor 11, a method for controlling thermal damage of a thermal system of a PHEV vehicle type as described above is implemented.

[0109] Specifically, the computer program 14 may include a program code, which includes a computer operation instruction; a memory 10, which is used to store the computer program 14. The memory 10 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory; a communication interface 13, which is used to communicate with other devices such as a client or other servers.

[0110] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for controlling thermal damage of a PHEV thermal system, characterized in that: include: Set the ambient temperature threshold, engine water temperature threshold and turbocharger water temperature threshold; When the engine is turned off, the ambient temperature is compared with the ambient temperature threshold, the engine water temperature is compared with the engine water temperature threshold, and the turbocharger water temperature is compared with the turbocharger water temperature threshold to obtain a comparison result; According to the comparison results, the heat damage condition is determined, and the corresponding control strategy is set according to the heat damage condition; According to the control strategy, the cycle opening, duty cycle, operating time and electric water pump flow are executed to ensure sufficient flow of coolant and air during hot soaking and sufficient heat exchange between the radiator and the surrounding environment. Among them, based on the corresponding control strategy, the cycle opening of the thermal management large cycle, the duty cycle of the electric fan and the operating time at this duty cycle, as well as the electric water pump flow during the operating time are set.

2. A PHEV thermal system thermal damage control method according to claim 1, characterized in that: Setting the ambient temperature threshold, engine water temperature threshold and turbocharger water temperature threshold also includes: The ambient temperature threshold is calibrated according to the ambient temperature. When the ambient temperature is greater than the ambient temperature threshold, the ambient temperature is calibrated to a high ambient temperature condition. When the ambient temperature is less than the ambient temperature threshold, the ambient temperature is calibrated to a normal ambient temperature condition. The engine water temperature threshold is calibrated according to the engine water temperature. When the engine water temperature is greater than the engine water temperature threshold, the engine water temperature is calibrated as the engine high temperature condition. When the engine water temperature is less than the engine water temperature threshold, the engine water temperature is calibrated as the engine normal temperature condition. The turbocharger water temperature threshold is calibrated according to the turbocharger water temperature. When the turbocharger water temperature is greater than the turbocharger water temperature threshold, the turbocharger water temperature is calibrated to the turbocharger high temperature condition. When the turbocharger water temperature is less than the turbocharger water temperature threshold, the turbocharger water temperature is calibrated to the turbocharger normal temperature condition.

3. A PHEV thermal system thermal damage control method according to claim 2, characterized in that: According to the heat damage conditions, the corresponding control strategy is set, including: The heat damage working conditions include a first heat damage working condition, a second heat damage working condition, a third heat damage working condition and a fourth heat damage working condition, and the corresponding control strategies include a first control strategy, a second control strategy, a third control strategy and a fourth control strategy; The ambient normal temperature condition, the engine high temperature condition and the turbocharger normal temperature condition form a first heat damage condition, and the first control strategy is executed according to the first heat damage condition; The ambient normal temperature condition, the engine high temperature condition and the turbocharger high temperature condition form a second heat damage condition, and the second control strategy is executed according to the second heat damage condition; The ambient high temperature condition, the engine normal temperature condition and the turbocharger high temperature condition form a third heat damage condition, and the third control strategy is executed according to the third heat damage condition; The high-temperature ambient condition, the high-temperature engine condition and the high-temperature turbocharging condition form a fourth heat-damage condition, and the fourth control strategy is executed according to the fourth heat-damage condition.

4. A PHEV thermal system heat damage control method according to claim 3, characterized in that: According to the control strategy, the cycle opening, duty cycle, running time and electric water pump flow are executed to ensure sufficient flow of coolant and air during hot soaking, and sufficient heat exchange between the radiator and the surrounding environment, including: The cycle opening includes a first cycle opening and a second cycle opening, the duty cycle includes a first duty cycle, a second duty cycle, a third duty cycle and a fourth duty cycle, the operation time includes a first operation time, a second operation time, a third operation time and a fourth operation time, and the electric water pump flow includes a first electric water pump flow, a second electric water pump flow, a third electric water pump flow and a fourth electric water pump flow; The first control strategy executes a first cycle opening, a first duty cycle, a first operating time of the first duty cycle, and a first electric water pump flow rate during the first operating time; The second control strategy implements a second cycle opening, a second duty cycle, a second operating time of the second duty cycle, and a second electric water pump flow rate during the second operating time; The third control strategy implements a second cycle opening, a third duty cycle, a third operating time of the third duty cycle, and a third electric water pump flow rate during the third operating time; The fourth control strategy executes a second cycle opening, a fourth duty cycle, a fourth operating time of the fourth duty cycle, and a fourth electric water pump flow rate during the fourth operating time; Among them, the second cycle opening is greater than the first cycle opening, the first duty cycle is less than the second duty cycle, the second duty cycle is less than the third duty cycle, the third duty cycle is not greater than the fourth duty cycle, the first operating time is less than the second operating time, the second operating time is less than the third operating time, the third operating time is less than the fourth operating time, the first electric water pump flow is less than the second electric water pump flow, the second electric water pump flow is less than the third electric water pump flow, and the third electric water pump flow is less than the fourth electric water pump flow.

5. A PHEV thermal system thermal damage control device, using a PHEV thermal system thermal damage control method according to any one of claims 1 to 4, characterized in that: include: A setting module, used to set the ambient temperature threshold, the engine water temperature threshold and the turbocharger water temperature threshold; A comparison module, used for comparing the ambient temperature with the ambient temperature threshold, the engine water temperature with the engine water temperature threshold, and the turbocharger water temperature with the turbocharger water temperature threshold to obtain a comparison result when the engine is turned off; A determination module is used to determine the heat damage condition according to the comparison result and set a corresponding control strategy according to the heat damage condition; The execution module is used to execute the cycle opening, duty cycle, operating time and electric water pump flow according to the control strategy to ensure sufficient flow of coolant and air during hot soaking and sufficient heat exchange between the radiator and the surrounding environment. Based on the corresponding control strategy, the cycle opening of the thermal management large cycle, the duty cycle of the electric fan and the operating time at this duty cycle, as well as the electric water pump flow during the operating time are set.

6. A PHEV thermal system heat damage control system, using a PHEV thermal system heat damage control method according to any one of claims 1 to 4, characterized in that: include: An engine coolant circulation loop, the engine coolant circulation loop comprising an engine, a thermal management module, a turbocharger, an electric water pump, a radiator and an expansion water tank, wherein the engine, the thermal management module, the turbocharger, the electric water pump, the radiator and the expansion water tank are connected via a cooling pipeline; The engine exhaust circuit exhausts the radiator, engine and turbocharger through the engine exhaust circuit.

7. A PHEV thermal system heat damage control system according to claim 6, characterized in that: The engine exhaust circuit includes: A radiator air return pipe, used to discharge air in the radiator; An engine cylinder air return pipe, used to discharge the air in the engine cylinder flow channel; The boost circuit return air pipe is used to discharge the air in the coolant flow channel of the turbocharger and connect the boost circuit return air pipe with the engine coolant circulation circuit.

8. A PHEV thermal system heat damage control system according to claim 6, characterized in that: include: The vehicle VCU is used to make algorithmic judgments based on the ambient temperature, the engine water temperature of the coolant in the engine coolant circulation loop, and the turbocharger water temperature of the turbocharger circuit coolant, and adopt different thermal damage control strategies to control the operation of the thermal management module, electric water pump and electric fan. Among them, the thermal management module is used to realize the opening and closing of the large cycle of the engine coolant circulation loop.

9. An electronic device, characterized in that: The electronic device comprises: one or more processors; a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement a method for controlling thermal damage of a thermal system of a PHEV vehicle as described in any one of claims 1 to 4.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, a method for controlling thermal damage of a thermal system of a PHEV vehicle type as described in any one of claims 1 to 4 is implemented.

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