Exhaust gas waste heat recovery system and control method thereof

Abstract

The application discloses an exhaust waste heat recycling system and a control method thereof. The system comprises a cooling liquid filling tank for providing cooling liquid; an exhaust tail pipe water jacket sleeved on the tail end of the exhaust tail pipe of a vehicle and communicated with the cooling liquid filling tank, for obtaining exhaust energy from the exhaust tail pipe to heat the cooling liquid; a circulating pump with an input end communicated with the exhaust tail pipe water jacket, a first output end communicated with a heat exchanger of a fuel tank through a first circulating pipeline, and a second output end communicated with a heater core of a cab through a second circulating pipeline, for providing circulating power for the cooling liquid; and a controller electrically connected with the circulating pump, for obtaining a current state signal of the vehicle, and controlling the start and stop of the circulating pump and the on-off of the first circulating pipeline and / or the second circulating pipeline according to the current state signal of the vehicle, to determine whether to provide heat for the fuel tank and / or the cab. Through the system, the exhaust waste heat is utilized to heat the fuel tank and / or heat the cab.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle exhaust waste heat recovery, and in particular to an exhaust waste heat recovery system and a control method thereof. BACKGROUND

[0002] During the driving process of heavy truck vehicles in cold regions in winter, the driver's cabin temperature is low, which leads to poor driving comfort, and the fuel temperature in the fuel tank assembly exposed to the outside is too low, which leads to the problem that the fuel cannot be used due to waxing.

[0003] In the prior art, in the case of low temperature in the driver's cabin, a small fuel tank is usually additionally installed outside the driver's cabin, and an oil boiler is arranged inside the driver's cabin, which is heated by the small fuel tank to provide auxiliary heating. However, this auxiliary heating will cause additional fuel consumption, increase operating costs, and the exhaust gas produced by combustion will pollute the air and have adverse effects on the driver and the atmospheric environment.

[0004] In the prior art, in the case of low temperature in the driver's cabin, a small fuel tank is usually additionally installed outside the driver's cabin, and an oil boiler is arranged inside the driver's cabin, which is heated by the small fuel tank to provide auxiliary heating. However, this auxiliary heating will cause additional fuel consumption, increase operating costs, and the exhaust gas produced by combustion will pollute the air and have adverse effects on the driver and the atmospheric environment. SUMMARY

[0005] The present application provides an exhaust waste heat recovery system and a control method thereof, which utilizes exhaust waste heat to heat the fuel tank and the driver's cabin according to the current state signal of the vehicle, even when the temperature is low, thereby achieving energy saving and emission reduction.

[0006] In a first aspect, the present application provides an exhaust waste heat recovery system, comprising:

[0007] A coolant filling tank for providing coolant;

[0008] An exhaust tailpipe water jacket sleeved on the end of the exhaust tailpipe of the vehicle and in communication with the coolant filling tank, for obtaining exhaust energy from the exhaust tailpipe to heat the coolant;

[0009] A circulating pump, the input end of the circulating pump being in communication with the exhaust tailpipe water jacket, the first output end being in communication with the heat exchanger of the fuel tank through a first circulating pipeline, and the second output end being in communication with the heater core of the driver's cabin through a second circulating pipeline, for providing circulating power for the coolant;

[0010] A controller, the controller being electrically connected with the circulating pump, for obtaining a current state signal of the vehicle, and controlling the start and stop of the circulating pump and the on-off of the first circulating pipeline and / or the second circulating pipeline according to the current state signal of the vehicle, to determine whether to heat the fuel tank and / or the driver's cabin.

[0011] Optionally, the first circulation pipeline comprises a first switch;

[0012] The controller is further electrically connected with the first switch, and is configured to control the on-off of the first switch according to the current vehicle state signal, so as to determine whether to heat the fuel tank.

[0013] Optionally, the second circulation pipeline comprises a second switch;

[0014] The controller is further electrically connected with the second switch, and is configured to control the on-off of the second switch according to the current vehicle state signal, so as to determine whether to heat the cab.

[0015] In a second aspect, the present application provides a control method of the exhaust waste heat recycling system, which is applied to the exhaust waste heat recycling system mentioned above, and the method is executed by the controller;

[0016] The method comprises:

[0017] Obtaining a current vehicle state signal;

[0018] According to the current vehicle state signal, the start-stop of the circulation pump and the on-off of the first circulation pipeline and / or the second circulation pipeline are controlled, so as to determine whether to heat the fuel tank and / or the cab.

[0019] Optionally, the current vehicle state signal comprises a current exhaust tailpipe end temperature signal, a current nitrogen oxide concentration signal, a current fuel tank temperature signal and a current cab temperature signal.

[0020] Optionally, according to the current vehicle state signal, the start-stop of the circulation pump and the on-off of the first circulation pipeline and / or the second circulation pipeline are controlled, so as to determine whether to heat the fuel tank and / or the cab, which comprises:

[0021] When the current exhaust tailpipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal and the current cab temperature signal all satisfy the corresponding preset corresponding relationship, the circulation pump is controlled to be started, and the first circulation pipeline and the second circulation pipeline are controlled to be turned on, so as to heat the fuel tank and the cab;

[0022] When at least one of the current exhaust tailpipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal and the current cab temperature signal does not satisfy the corresponding preset corresponding relationship, the circulation pump is controlled to be stopped, and the first circulation pipeline and / or the second circulation pipeline are controlled to be turned off, so as to stop heating the fuel tank and / or the cab.

[0023] Optionally, when the current exhaust tailpipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal and the current cab temperature signal all satisfy the corresponding preset corresponding relationship, the circulation pump is controlled to be started, and the first circulation pipeline and the second circulation pipeline are controlled to be turned on, which comprises:

[0024] when the current nitrogen oxide concentration signal is less than the first preset threshold value, the current exhaust tailpipe end temperature signal is greater than or equal to the second preset threshold value, and the current fuel tank temperature signal is less than or equal to the third preset threshold value, controlling the circulating pump to be turned on and the first circulating pipeline to be turned on;

[0025] when the current nitrogen oxide concentration signal is less than the first preset threshold value, the current exhaust tailpipe end temperature signal is greater than or equal to the second preset threshold value, and the current cab temperature signal is less than the fourth preset threshold value, controlling the circulating pump to be turned on and the second circulating pipeline to be turned on.

[0026] Optionally, when at least one of the current exhaust tailpipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal and the current cab temperature signal does not satisfy the corresponding preset corresponding relationship, controlling the circulating pump to be turned off and the first circulating pipeline and / or the second circulating pipeline to be turned off, comprising:

[0027] when the current nitrogen oxide concentration signal is greater than or equal to the first preset threshold value, controlling the circulating pump to be turned off;

[0028] when the current nitrogen oxide concentration signal is less than the first preset threshold value and the current exhaust tailpipe end temperature signal is less than the second preset threshold value, controlling the circulating pump to be turned off;

[0029] when the current nitrogen oxide concentration signal is less than the first preset threshold value, the current exhaust tailpipe end temperature signal is greater than or equal to the second preset threshold value, and the current fuel tank temperature signal is greater than the third preset threshold value, controlling the first circulating pipeline to be turned off;

[0030] when the current nitrogen oxide concentration signal is less than the first preset threshold value, the current exhaust tailpipe end temperature signal is greater than or equal to the second preset threshold value, and the current cab temperature signal is greater than or equal to the fourth preset threshold value, controlling the second circulating pipeline to be turned off.

[0031] Optionally, the first circulating pipeline comprises a first switch;

[0032] controlling the circulating pump to be turned on and the first circulating pipeline to be turned on, comprising:

[0033] controlling the circulating pump to be turned on and the first switch to be turned on.

[0034] Optionally, the second circulating pipeline comprises a second switch;

[0035] controlling the circulating pump to be turned on and the second circulating pipeline to be turned on, comprising:

[0036] controlling the circulating pump to be turned on and the second switch to be turned on.

[0037] The technical scheme of the present application comprises the following steps: the exhaust tail pipe water jacket is sleeved on the exhaust tail pipe, the input end of the circulating pump is communicated with the exhaust tail pipe water jacket, the first output end is communicated with the heat exchanger of the fuel tank through the first circulating pipeline, and the second output end is communicated with the heating core of the cab through the second circulating pipeline, so that the gas discharged at the exhaust tail pipe can heat the coolant, the controller obtains the current state signal of the vehicle, controls the start and stop of the circulating pump and the on-off of the first circulating pipeline and / or the second circulating pipeline according to the current state signal of the vehicle, and determines whether to provide heat to the fuel tank and / or the cab, when the controller controls the circulating pump to be started and the first circulating pipeline and the second circulating pipeline to be turned on, the heated coolant flows to the heat exchanger of the fuel tank through the first circulating pipeline and flows to the heating core of the cab through the second circulating pipeline under the power of the circulating pump, so that the fuel tank is heated and the cab is heated, and when the circulating pump is controlled to be turned off, the heated coolant cannot flow to the first circulating pipeline and the second circulating pipeline, so that the heating of the fuel tank and the heating of the cab are stopped. Through the above structure, the exhaust heat is utilized to heat the fuel tank and heat the cab, energy saving and emission reduction are achieved, pollution is reduced, and the comfort of the driver in the cab is improved.

[0038] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0040] Figure 1 A structural schematic diagram of an exhaust heat recovery system provided by the embodiment of the present application;

[0041] Figure 2 A flow chart of a control method of the exhaust heat recovery system provided by the embodiment of the present application;

[0042] Figure 3 A flow chart of a second control method of the exhaust heat recovery system provided by the embodiment of the present application;

[0043] Figure 4 An electrical structural schematic diagram of the exhaust heat recovery system provided by the embodiment of the present application;

[0044] Figure 5A flow chart of a control method of a third exhaust waste heat recycling system provided by an embodiment of the present application is shown in FIG. 6.

[0045] Figure 6 is a structural block diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0047] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to the process, method, product or device.

[0048] In an embodiment, Figure 1 A structural schematic diagram of an exhaust waste heat recycling system provided by an embodiment of the present application is shown in FIG. 1. The present embodiment can be applied to a heavy truck to utilize exhaust waste heat to realize heating of a cab and heating of a fuel tank when the ambient temperature is low, so as to avoid the situation that the fuel tank cannot be used due to waxing caused by excessively low temperature, thereby causing poor comfort of the driver. The exhaust waste heat recycling system can be configured in an electronic device. Figure 1As shown, the system comprises: a cooling liquid filling tank 1 for providing cooling liquid; an exhaust tailpipe water jacket 2 sleeved on the end of the exhaust tailpipe of the vehicle and in communication with the cooling liquid filling tank 1, for obtaining exhaust energy from the exhaust tailpipe to heat the cooling liquid; a circulating pump 3, the input end of which is in communication with the exhaust tailpipe water jacket 2, the first output end thereof is in communication with the heat exchanger of the fuel tank 4 through a first circulating pipeline 30, and the second output end thereof is in communication with the heater core of the cab 5 through a second circulating pipeline 20, for providing circulating power for the cooling liquid; and a controller 6 electrically connected with the circulating pump 3, for obtaining the current state signal of the vehicle and controlling the start-stop of the circulating pump 3 and the on-off of the first circulating pipeline 30 and / or the second circulating pipeline 20 according to the current state signal of the vehicle, to determine whether to provide heat to the fuel tank 4 and / or the cab 5.

[0049] The cooling liquid filling tank 1 is used to store cooling liquid and supplement the system when needed. In this embodiment, the cooling liquid filling tank 1 is used to provide cooling liquid for subsequent circulation. The exhaust tailpipe water jacket 2 is a device for protection and heat insulation, which can be sleeved on the exhaust tailpipe of the vehicle, and its main function is to prevent heat loss or the risk of scalding caused by the high surface temperature of the exhaust tailpipe, and also has the functions of sound insulation and aesthetics. In this embodiment, the exhaust tailpipe water jacket 2 is sleeved on the exhaust tailpipe without affecting the catalytic reduction reaction of the aftertreatment assembly, and the high-temperature nitrogen oxides can be normally discharged from the exhaust tailpipe to heat the cooling liquid and increase the temperature of the cooling liquid. The circulating pump 3 is a device for providing circulating power for the cooling liquid to circulate in the system. In this embodiment, the input end of the circulating pump 3 is in communication with the exhaust tailpipe water jacket 2, the first output end thereof is in communication with the heat exchanger of the fuel tank 4 through the first circulating pipeline 30, and the second output end thereof is in communication with the heater core of the cab 5 through the second circulating pipeline 20. When the first circulating pipeline 30 is connected, the circulating pump 3 can circulate the heated cooling liquid to the heat exchanger of the fuel tank 4 to heat the fuel tank 4. When the second circulating pipeline 20 is connected, the circulating pump 3 can circulate the heated cooling liquid to the heater core in the cab to heat the cab. The controller 6 is the core control system of the system, which is electrically connected with the circulating pump 3 and controls the start-stop of the circulating pump 3 and the on-off of the first circulating pipeline 30 and / or the second circulating pipeline 20 according to the obtained current state signal of the vehicle.

[0050] Specifically, when the outside temperature is too low and heat needs to be provided to the cab and / or the fuel tank, the exhaust tailpipe water jacket 2 is wrapped around the exhaust tailpipe, i.e., wrapped outside the exhaust tailpipe, which belongs to the type of wrap-around arrangement. At this time, the high-temperature waste heat gas discharged by the vehicle through the exhaust tailpipe can heat the coolant flowing through the exhaust tailpipe water jacket 2. The heated coolant can be transmitted to the heater core of the cab 5 and / or the heat exchanger of the fuel tank 4 under the action of the circulating pump 3. In this process, the controller 6 obtains a vehicle current state signal, which is a signal that can reflect the current working state of the vehicle and the temperature inside the cab. After the controller 6 obtains the vehicle current state signal, it controls the circulating pump 3 to be turned on or off, and controls the first circulating pipeline 30 and / or the second circulating pipeline 20 to be turned on or off according to the vehicle current state signal. When the controller 6 controls the circulating pump 3 to be turned on and the first circulating pipeline 30 and the second circulating pipeline 20 to be turned on according to the vehicle current state signal, at this time, the heated coolant flows to the heat exchanger of the fuel tank 4 through the first circulating pipeline 30 under the power action of the circulating pump 3, so as to transfer heat to the fuel tank 4 through the heat exchanger, thereby achieving heating of the fuel tank 4; at the same time, the heated coolant flows to the heater core inside the cab through the second circulating pipeline 20, in which the heat released by the coolant heats the air flowing through the heater core, and then the fan sends the hot air into the cab 5, thereby achieving heating of the cab 5. In addition, when the controller 6 controls the circulating pump 3 to be turned off and the first circulating pipeline 30 and / or the second circulating pipeline 20 to be turned off according to the vehicle current state signal, at this time, there is no power action of the circulating pump 3, and the heated coolant does not enter the first circulating loop 10 and the second circulating loop 20, so as not to provide heat to the fuel tank 4 and the cab 5.

[0051] The technical scheme of the embodiment of the present application is that the exhaust tail pipe water jacket is sleeved on the exhaust tail pipe, the input end of the circulating pump is communicated with the exhaust tail pipe water jacket, the first output end is communicated with the heat exchanger of the fuel tank through the first circulating pipeline, and the second output end is communicated with the heating core of the cab through the second circulating pipeline, so that the high-temperature waste heat gas discharged at the exhaust tail pipe can heat the coolant, the controller acquires the current state signal of the vehicle, controls the start and stop of the circulating pump and the on-off of the first circulating pipeline and / or the second circulating pipeline according to the current state signal of the vehicle, and determines whether to provide heat for the fuel tank and / or the cab. When the controller controls the circulating pump to be started and the first circulating pipeline and the second circulating pipeline to be turned on, the heated coolant flows to the heat exchanger of the fuel tank through the first circulating pipeline and flows to the heating core of the cab through the second circulating pipeline under the power of the circulating pump, so that the fuel tank is heated and the cab is heated. When the circulating pump is controlled to be turned off, the heated coolant cannot flow to the first circulating pipeline and the second circulating pipeline, so that the heating of the fuel tank and the heating of the cab are stopped. Through the above structure, the exhaust waste heat is utilized to heat the fuel tank and heat the cab, energy saving and emission reduction are achieved, pollution is reduced, and the comfort of the driver in the cab is improved.

[0052] Optionally, with reference back to Figure 1 , the first circulating pipeline 30 comprises a first switch 301; the controller 6 is further electrically connected with the first switch 301 and is configured to control the on-off of the first switch 301 according to the current state signal of the vehicle, so as to determine whether to provide heat for the fuel tank 4.

[0053] Optionally, the first switch 301 can include but is not limited to a solenoid valve.

[0054] Specifically, when the controller 6 controls the first circulating pipeline 30 to be turned on, the controller 6 essentially controls the first switch 301 to be closed, so that the first circulating pipeline 30 is turned on, and the heated coolant can flow to the fuel tank 4 through the first circulating pipeline 30. When the controller 6 controls the first circulating pipeline 30 to be turned off, the controller 6 essentially controls the first switch 301 to be opened, so that the first circulating pipeline 30 is turned off, and the heated coolant cannot flow to the fuel tank 4 through the first circulating pipeline 30.

[0055] Optionally, with reference back to Figure 1 , the second circulating pipeline 20 comprises a second switch 201; the controller 6 is further electrically connected with the second switch 201 and is configured to control the on-off of the second switch 201 according to the current state signal of the vehicle, so as to determine whether to provide heat for the cab.

[0056] Optionally, the second switch 201 can include but is not limited to a solenoid valve.

[0057] Specifically, the controller 6 controls the second circulating pipeline 20 to be turned on, which essentially controls the second switch 201 to be closed, so that the second circulating pipeline 20 is turned on, and the heated coolant can flow to the cab 5 through the second circulating pipeline 20. When the controller 6 controls the second circulating pipeline 20 to be turned off, it essentially controls the second switch 201 to be opened, so that the second circulating pipeline 20 is turned off, and the heated coolant cannot flow to the cab 5 through the second circulating pipeline 20.

[0058] In another specific embodiment, Figure 2 A flow chart of a control method of an exhaust waste heat recycling system according to an embodiment of the present application is provided. The control method is applied to the exhaust waste heat recycling system described above, and is executed by a controller. As shown in the figure, the method comprises the following steps. Figure 2 The method comprises the following steps.

[0059] S110, acquiring a vehicle current state signal.

[0060] S120, controlling the start and stop of the circulating pump, and the on-off of the first circulating pipeline and / or the second circulating pipeline according to the vehicle current state signal, to determine whether to provide heat to the fuel tank and / or the cab.

[0061] Specifically, when providing heat to the cab and / or the fuel tank, the vehicle current state signal is acquired, and the circulating pump is controlled to be turned on or off, and the first circulating pipeline and / or the second circulating pipeline is controlled to be turned on or off according to the vehicle current state signal. When the circulating pump is controlled to be turned on, and the first circulating pipeline and the second circulating pipeline are controlled to be turned on according to the vehicle current state signal, the heated coolant flows to the heat exchanger of the fuel tank through the first circulating pipeline under the power of the circulating pump at this time, so as to transfer heat to the fuel in the fuel tank through the heat exchanger, thereby heating the fuel tank. At the same time, the heated coolant flows to the heater core in the cab through the second circulating pipeline, and the heat released by the coolant heats the air flowing through the heater core, and then the fan sends the hot air into the cab, thereby heating the cab. When the circulating pump is controlled to be turned off, and the first circulating pipeline and / or the second circulating pipeline are controlled to be turned off according to the vehicle current state signal, the heated coolant cannot enter the first circulating pipeline and the second circulating pipeline under the power of the circulating pump at this time, so as to not provide heat to the fuel tank and the cab.

[0062] The technical scheme of the embodiment of the present application acquires a vehicle current state signal, and controls the start and stop of the circulating pump, and the on-off of the first circulating pipeline and / or the second circulating pipeline according to the vehicle current state signal, to determine whether to provide heat to the fuel tank and / or the cab. By using the above method, heat is provided to the fuel tank and / or the cab, energy saving and emission reduction are achieved, pollution is reduced, and the comfort of the driver in the cab is improved.

[0063] In another optional embodiment, Figure 3 A flow chart of a control method of a second exhaust waste heat recovery and utilization system according to an embodiment of the present application is shown in FIG. 12. The embodiment refines the specific implementation of S120 in the above-mentioned embodiment, i.e., controlling the start and stop of the circulating pump and the on-off of the first circulating pipeline and / or the second circulating pipeline according to the current vehicle state signal to determine whether to provide heat to the fuel tank and / or the cab. For details, refer to Figure 3 The method comprises the following steps:

[0064] S210, obtaining a current vehicle state signal.

[0065] The current vehicle state signal comprises a current exhaust tailpipe end temperature signal, a current nitrogen oxide concentration signal, a current fuel tank temperature signal, and a current cab temperature signal.

[0066] Specifically, the current exhaust tailpipe end temperature signal can be obtained by an exhaust tailpipe temperature sensor arranged at the exhaust tailpipe end, but is not limited to this. The current nitrogen oxide concentration signal can be obtained by a nitrogen oxide sensor arranged at the exhaust tailpipe end, but is not limited to this. In this embodiment, the concentration obtained can be measured by the electronic control unit of the vehicle to determine whether it meets the national standard requirements. The current fuel tank temperature signal can be obtained by a temperature sensor arranged on the fuel tank, but is not limited to this. The current cab temperature signal can be obtained by a temperature sensor arranged in the cab, but is not limited to this.

[0067] S220, when the current exhaust tailpipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal, and the current cab temperature signal all satisfy the corresponding preset corresponding relationship, controlling the circulating pump to be turned on and the first circulating pipeline and the second circulating pipeline to be turned on to provide heat to the fuel tank and the cab.

[0068] Specifically, when the current nitrogen oxide concentration signal is less than a first preset threshold, the current exhaust tailpipe end temperature signal is greater than or equal to a second preset threshold, and the current fuel tank temperature signal is less than or equal to a third preset threshold, the circulating pump is controlled to be turned on and the first circulating pipeline is controlled to be turned on. When the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tailpipe end temperature signal is greater than or equal to the second preset threshold, and the current cab temperature signal is less than a fourth preset threshold, the circulating pump is controlled to be turned on and the second circulating pipeline is controlled to be turned on.

[0069] Specifically, after obtaining the current exhaust tailpipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal and the current cab temperature signal, according to the obtained current exhaust tailpipe end temperature signal, the current nitrogen oxide concentration signal and the current fuel tank temperature signal, when it is determined that the current nitrogen oxide concentration signal is less than the first preset threshold value, the current exhaust tailpipe end temperature signal is greater than or equal to the second preset threshold value, and the current fuel tank temperature signal is less than or equal to the third preset threshold value, it indicates that the nitrogen oxide concentration signal is lower than the preset concentration standard at this time, the exhaust temperature at the exhaust tailpipe end reaches the required temperature for providing heat by using exhaust waste heat, and the fuel tank temperature is too low, and heat needs to be provided to the fuel tank temperature at this time, the circulating pump is controlled to be turned on at this time, the first circulating pipeline is turned on, so that the heated coolant flows to the heat exchanger of the fuel tank through the first circulating pipeline under the power action of the circulating pump, heat exchange of the fuel tank is realized, the temperature of the fuel tank is increased, and heating of the fuel tank is realized. The first preset threshold value can be the average concentration of the nitrogen oxide concentration standard, for example, the first preset threshold value within 1 hour is 200 μg / m 3 , the first preset threshold value within 24 hours is 80 μg / m 3 , and can be determined according to actual conditions, which is not limited herein. The second preset threshold value can be 200 ℃. The third preset threshold value can be 4 ℃.

[0070] According to the obtained current exhaust tailpipe end temperature signal, the current nitrogen oxide concentration signal and the current cab temperature signal, when it is determined that the current nitrogen oxide concentration signal is less than the first preset threshold value, the current exhaust tailpipe end temperature signal is greater than or equal to the second preset threshold value, and the current cab temperature signal is less than the fourth preset threshold value, it indicates that the nitrogen oxide concentration signal is lower than the preset concentration standard at this time, the exhaust temperature at the exhaust tailpipe end reaches the required temperature for providing heat by using exhaust waste heat, and the temperature in the cab is too low, and heating of the cab is needed at this time, the circulating pump is controlled to be turned on at this time, the second circulating pipeline is turned on, so that the heated coolant flows to the heater core of the cab through the second circulating pipeline under the power action of the circulating pump, heat is released by the heated coolant, air flowing through is heated, and then the hot air is sent into the cab by the fan, to realize heating of the cab. The fourth preset threshold value can be the air conditioning set temperature in the cab, for example, the air conditioning set temperature is 23 ℃, and the fourth preset threshold value is 23 ℃, which can be determined according to actual conditions, which is not limited herein.

[0071] S230, when at least one of the current exhaust tailpipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal and the current cab temperature signal does not satisfy the corresponding preset corresponding relationship, the circulating pump is controlled to be turned off, and the first circulating pipeline and / or the second circulating pipeline is turned off, to stop providing heat to the fuel tank and / or the cab.

[0072] wherein the step can be refined as: controlling the circulating pump to be closed when the current nitrogen oxide concentration signal is greater than or equal to a first preset threshold; controlling the circulating pump to be closed when the current nitrogen oxide concentration signal is less than the first preset threshold and the current exhaust tailpipe end temperature signal is less than a second preset threshold; controlling the first circulating pipeline to be closed when the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tailpipe end temperature signal is greater than or equal to the second preset threshold, and the current fuel tank temperature signal is greater than a third preset threshold; and controlling the second circulating pipeline to be closed when the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tailpipe end temperature signal is greater than or equal to the second preset threshold, and the current cab temperature signal is greater than or equal to a fourth preset threshold.

[0073] Specifically, after obtaining the current exhaust tailpipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal and the current cab temperature signal, it is determined that at least one of the current exhaust tailpipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal and the current cab temperature signal does not satisfy the corresponding preset corresponding relationship, indicating that the current state of the vehicle at this time is not sufficient to achieve the use of waste heat to provide heat to the fuel tank and the cab, and then the circulating pump is controlled to be closed, and the first circulating pipeline and / or the second circulating pipeline is controlled to be closed to stop providing heat to the fuel tank and / or the cab. That is, when it is determined that the current nitrogen oxide concentration signal is greater than or equal to the first preset threshold, it indicates that the current nitrogen oxide emission of the vehicle is too much, which does not meet the national standard and causes air pollution, and then the circulating pump is controlled to be closed and waste heat recovery is not performed. When it is determined that the current nitrogen oxide concentration signal is less than the first preset threshold and the current exhaust tailpipe end temperature signal is less than the second preset threshold, it indicates that the nitrogen oxide concentration meets the national standard, but the exhaust tailpipe end temperature is too low to meet the heat required for providing heat to the fuel tank and / or the cab, and then the circulating pump is controlled to be closed to stop providing heat to the fuel tank and the cab, that is, waste heat recovery is not performed. When it is determined that the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tailpipe end temperature signal is greater than or equal to the second preset threshold, and the current fuel tank temperature signal is greater than the third preset threshold, it indicates that the nitrogen oxide concentration meets the national standard, the exhaust tailpipe end temperature meets the required temperature for providing heat, but the current temperature of the fuel tank is too high and there is no risk of waxing, so the fuel tank does not need to be heated, and then the first circulating pipeline is controlled to be closed, so that the heated coolant cannot flow to the fuel tank through the first circulating pipeline under the action of the circulating pump, and the fuel tank cannot be provided with heat. When it is determined that the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tailpipe end temperature signal is greater than or equal to the second preset threshold, and the current cab temperature signal is greater than or equal to the fourth preset threshold, it indicates that the nitrogen oxide concentration meets the national standard, the exhaust tailpipe end temperature meets the required temperature for providing heat, but the current temperature in the cab reaches the preset temperature and the cab does not need to be provided with heat, and then the second circulating pipeline is controlled to be closed, so that the heated coolant cannot flow to the heating core of the cab through the second circulating pipeline under the action of the circulating pump, and the cab cannot be heated.

[0074] The technical scheme of the embodiment of the present application is that when it is determined that the current exhaust tailpipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal and the current cab temperature signal all satisfy the corresponding preset corresponding relationship, the circulating pump is controlled to be turned on, and the first circulating pipeline and the second circulating pipeline are controlled to be turned on, so as to provide heat to the fuel tank and the cab; when at least one of the current exhaust tailpipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal and the current cab temperature signal does not satisfy the corresponding preset corresponding relationship, the circulating pump is controlled to be turned off, and the first circulating pipeline and / or the second circulating pipeline is controlled to be turned off, so as to stop providing heat to the fuel tank and / or the cab. By using the above method, the heat is provided to the fuel tank and / or the cab under the condition of satisfying the corresponding condition, the vehicle consumption is reduced, energy saving and emission reduction are achieved, pollution is reduced, and intelligent exhaust waste heat recovery is achieved.

[0075] Optionally, the first circulating pipeline comprises a first switch; and the control of the circulating pump being turned on and the first circulating pipeline being turned on comprises: control of the circulating pump being turned on and the first switch being turned on.

[0076] Specifically, when the first circulating pipeline is controlled to be turned on, the embodiment is essentially to control the first switch to be turned on, so as to realize the flow of the cooling liquid to the fuel tank.

[0077] Optionally, the second circulating pipeline comprises a second switch; and the control of the circulating pump being turned on and the second circulating pipeline being turned on comprises: control of the circulating pump being turned on and the second switch being turned on.

[0078] Specifically, when the second circulating pipeline is controlled to be turned on, the embodiment is essentially to control the second switch to be turned on, so as to realize the flow of the cooling liquid to the cab.

[0079] In another specific embodiment, Figure 4 An electrical structure schematic diagram of an exhaust waste heat recovery system provided by the embodiment of the present application, Figure 5 A flow chart of a control method of a third exhaust waste heat recovery system provided by the embodiment of the present application, as shown in Figure 1 、 Figure 4 and Figure 5 , the method comprises:

[0080] S1. Detection of emission pollutant measurement: according to the nitrogen oxide concentration value recorded by the nitrogen oxygen sensor, the measurement in a unit cycle condition is performed by the ECU, the signal is transmitted to the controller of the system through the vehicle controller (VCU), and it is judged whether it satisfies the national standard; when it satisfies the national standard, the next step is judged; when it does not satisfy the national standard, the circulating pump is turned off, and the waste heat recovery is not enabled;

[0081] S2. When the nitrogen oxide concentration emission meets the national standard, the exhaust tailpipe end temperature is detected, the temperature type is collected based on the temperature sensor arranged at the exhaust tailpipe, the signal is transmitted to the controller of the system through the VCU, whether the exhaust tailpipe end temperature is higher than 200 DEG C is judged, when the exhaust temperature is higher than 200 DEG C, the next step is judged, otherwise the circulating pump is closed, and the waste heat recovery is not started;

[0082] S3. When the nitrogen oxide concentration emission meets the national standard, and the exhaust tailpipe end temperature is higher than 200 DEG C, the waste heat recovery preparation stage is entered, at this time, whether the waste heat recovery starts is judged according to the actual need, and the waste heat recovery energy is supplied to the target system required heat; wherein, the target system is the fuel tank and the cab;

[0083] S4. When the nitrogen oxide concentration emission meets the national standard, and the exhaust tailpipe end temperature is higher than 200 DEG C, the fuel temperature is detected, the fuel temperature signal is transmitted to the VCU, the temperature signal is transmitted to the controller of the system through the VCU, whether the fuel temperature is lower than 4 DEG C is judged, when the oil temperature is lower than 4 DEG C, the circulating pump is started by the controller, at this time, the waste heat recovery is started, and the fuel tank loop electromagnetic valve is opened, the waste heat is used to heat the fuel in the fuel tank, and the best state of the fuel is ensured;

[0084] S5. When the fuel tank heating function is started, the real-time temperature in the cab is obtained by the cab temperature sensor, the real-time temperature in the cab and the air conditioner set temperature are sent to the controller of the system through the VCU, when the cab temperature is lower than the air conditioner set temperature, the cab heating loop electromagnetic valve is opened, at this time, the waste heat recovery is applied to the cab heating, otherwise the cab heating loop electromagnetic valve is closed;

[0085] S6. When the fuel temperature is greater than 4 DEG C, the fuel tank heating function is closed, the real-time temperature in the cab is obtained by the cab temperature sensor, the real-time temperature in the cab and the air conditioner set temperature are sent to the controller of the system through the VCU, when the cab temperature is lower than the air conditioner set temperature, the cab heating loop electromagnetic valve is opened, at this time, the waste heat recovery is applied to the cab heating, otherwise the cab heating loop electromagnetic valve is closed.

[0086] In an embodiment, Figure 6 is a structural block diagram of an electronic device provided by an embodiment of the application, as shown in Figure 6As shown, a structural diagram of an electronic device 10 that can be used to implement embodiments of the present application is shown. The electronic device is intended to represent various forms of digital computers, such as laptops, desktops, tablets, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device can also represent various forms of mobile devices, such as personal digital assistants, cellular telephones, smartphones, wearable devices (e.g., headsets, glasses, watches, etc.), and other similar computing devices. The components shown here, their connections and relationships, and their functions, are meant to be examples only, and are not meant to limit implementations of the present application described and / or claimed in this document.

[0087] As shown, Figure 6 The electronic device 10 includes at least one processor 11, and a memory, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., connected to the at least one processor 11 in communication, where the memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer programs stored in the read-only memory (ROM) 12 or loaded into the random access memory (RAM) 13 from the storage unit 18. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0088] Various components in the electronic device 10 are connected to the I / O interface 15, including an input unit 16, such as a keyboard, a mouse, etc., an output unit 17, such as various types of displays, speakers, etc., a storage unit 18, such as a magnetic disk, an optical disk, etc., and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network, such as the Internet, and / or various telecommunications networks.

[0089] The processor 11 can be various general and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 performs various methods and processes described above, such as the control method of the exhaust heat recovery system.

[0090] In some embodiments, the control method of the exhaust heat recovery system can be implemented as a computer program tangibly embodied in a computer readable storage medium, e.g., the storage unit 18. In some embodiments, part or all of the computer program can be loaded onto the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded onto the RAM 13 and executed by the processor 11, one or more steps of the control method of the exhaust heat recovery system described above can be performed. Alternatively, in other embodiments, the processor 11 can be configured to perform the control method of the exhaust heat recovery system by any other suitable means, e.g., by means of firmware.

[0091] Various implementations of the systems and techniques described above can be realized in digital electronic circuitry, integrated circuitry, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on a chip (SOC), a programmable logic device (PLD), a computer hardware, firmware, software, and / or combinations thereof. These various implementations can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0092] Computer programs used to implement the processes of the present application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the computer program, when executed, implements the functions / acts specified in the flowcharts and / or block diagrams. The computer program can be executed entirely on a machine, partially on a machine, partially on a machine as a stand-alone software package, partially on a machine and partially on a remote machine or entirely on a remote machine or server.

[0093] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer-readable storage medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of a machine-readable storage medium will include one or more lines of a program of instructions in a transitory signal, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0094] To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0095] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), blockchain network, and the Internet.

[0096] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS service.

[0097] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, each step described in the present application can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solutions of the present application can be achieved, which is not limited herein.

[0098] The above detailed description does not constitute a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. An exhaust heat recovery system characterized by comprising: The application relates to an exhaust heat recovery system for a vehicle, comprising: a coolant filling tank for providing coolant; an exhaust tailpipe water jacket sleeved on the end of an exhaust tailpipe of the vehicle and communicating with the coolant filling tank, for obtaining exhaust energy from the exhaust tailpipe to heat the coolant; a circulating pump, the input end of which communicates with the exhaust tailpipe water jacket, the first output end of which communicates with a heat exchanger of a fuel tank through a first circulating pipeline, and the second output end of which communicates with a heater core of a cab through a second circulating pipeline, for providing circulating power for the coolant; a controller, electrically connected with the circulating pump, for obtaining a current vehicle state signal, and controlling the start-stop of the circulating pump and the opening-closing of the first circulating pipeline and / or the second circulating pipeline according to the current vehicle state signal, to determine whether to provide heat for the fuel tank and / or the cab; the current vehicle state signal comprises a current exhaust tailpipe end temperature signal, a current nitrogen oxide concentration signal, a current fuel tank temperature signal and a current cab temperature signal; when the current nitrogen oxide concentration signal is less than a first preset threshold value and the current exhaust tailpipe end temperature signal is greater than or equal to a second preset threshold value, the start-stop of the circulating pump and the opening-closing of the first circulating pipeline and / or the second circulating pipeline are controlled according to the current fuel tank temperature signal and / or the current cab temperature signal, to selectively provide heat for the fuel tank and / or the cab.

2. The exhaust heat recovery system according to claim 1, characterized by the first circulating pipeline comprises a first switch; the controller is further electrically connected with the first switch, for controlling the opening-closing of the first switch according to the current vehicle state signal, to determine whether to provide heat for the fuel tank.

3. The exhaust heat recovery system according to claim 1, characterized by the second circulating pipeline comprises a second switch; the controller is further electrically connected with the second switch, for controlling the opening-closing of the second switch according to the current vehicle state signal, to determine whether to provide heat for the cab.

4. A control method of an exhaust heat recovery system, characterized by, The method is executed by the controller of the exhaust heat recovery system according to any one of claims 1-3. The method comprises: obtaining a current vehicle state signal; controlling the start-stop of the circulating pump and the opening-closing of the first circulating pipeline and / or the second circulating pipeline according to the current vehicle state signal, to determine whether to provide heat for the fuel tank and / or the cab; the current vehicle state signal comprises a current exhaust tailpipe end temperature signal, a current nitrogen oxide concentration signal, a current fuel tank temperature signal and a current cab temperature signal; when the current nitrogen oxide concentration signal is less than a first preset threshold value and the current exhaust tailpipe end temperature signal is greater than or equal to a second preset threshold value, the start-stop of the circulating pump and the opening-closing of the first circulating pipeline and / or the second circulating pipeline are controlled according to the current fuel tank temperature signal and / or the current cab temperature signal, to selectively provide heat for the fuel tank and / or the cab.

5. The control method according to claim 4, characterized by controlling start and stop of the circulating pump and turning on and off of the first circulating pipeline and / or the second circulating pipeline according to the current state signals of the vehicle, to determine whether to provide heat to the fuel tank and / or the cab, comprising: controlling the circulating pump to start and the first circulating pipeline and the second circulating pipeline to turn on, to provide heat to the fuel tank and the cab, when the current exhaust tailpipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal and the current cab temperature signal all satisfy corresponding preset corresponding relationships; controlling the circulating pump to stop and the first circulating pipeline and / or the second circulating pipeline to turn off, to stop providing heat to the fuel tank and / or the cab, when at least one of the current exhaust tailpipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal and the current cab temperature signal does not satisfy the corresponding preset corresponding relationship.

6. The control method according to claim 5, characterized by controlling the circulating pump to start and the first circulating pipeline and the second circulating pipeline to turn on, to provide heat to the fuel tank and the cab, when the current exhaust tailpipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal and the current cab temperature signal all satisfy corresponding preset corresponding relationships, comprising: controlling the circulating pump to start and the first circulating pipeline to turn on, when the current nitrogen oxide concentration signal is less than a first preset threshold value, the current exhaust tailpipe end temperature signal is greater than or equal to a second preset threshold value, and the current fuel tank temperature signal is less than or equal to a third preset threshold value; controlling the circulating pump to start and the second circulating pipeline to turn on, when the current nitrogen oxide concentration signal is less than the first preset threshold value, the current exhaust tailpipe end temperature signal is greater than or equal to the second preset threshold value, and the current cab temperature signal is less than a fourth preset threshold value.

7. The control method according to claim 6, characterized by controlling the circulating pump to stop and the first circulating pipeline and / or the second circulating pipeline to turn off, when at least one of the current exhaust tailpipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal and the current cab temperature signal does not satisfy the corresponding preset corresponding relationship, comprising: controlling the circulating pump to stop when the current nitrogen oxide concentration signal is greater than or equal to the first preset threshold value; controlling the circulating pump to stop when the current nitrogen oxide concentration signal is less than the first preset threshold value, and the current exhaust tailpipe end temperature signal is less than the second preset threshold value; controlling the first circulating pipeline to turn off when the current nitrogen oxide concentration signal is less than the first preset threshold value, the current exhaust tailpipe end temperature signal is greater than or equal to the second preset threshold value, and the current fuel tank temperature signal is greater than the third preset threshold value; controlling the second circulating pipeline to turn off when the current nitrogen oxide concentration signal is less than the first preset threshold value, the current exhaust tailpipe end temperature signal is greater than or equal to the second preset threshold value, and the current cab temperature signal is greater than or equal to the fourth preset threshold value.

8. The control method according to claim 6, characterized by, The first circulation pipeline comprises a first switch; The control of the opening of the circulation pump and the conduction of the first circulation pipeline comprises: The control of the opening of the circulation pump and the conduction of the first switch.

9. The control method according to claim 6, characterized by, The second circulation pipeline comprises a second switch; The control of the opening of the circulation pump and the conduction of the second circulation pipeline comprises: The control of the opening of the circulation pump and the conduction of the second switch.

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