Exhaust waste heat recycling system and control method thereof

Abstract

The invention discloses an exhaust waste heat recycling system and a control method thereof.The system comprises a cooling liquid filling box used for providing cooling liquid; the exhaust tail pipe water jacket is annularly arranged at the tail end of an exhaust tail pipe of the vehicle in a sleeving mode, communicates with the cooling liquid filling box and is used for obtaining exhaust energy from the exhaust tail pipe so as to heat the cooling liquid; the input end of the circulating pump is communicated with the exhaust tail pipe water jacket, the first output end of the circulating pump is communicated with a heat exchanger of the fuel tank through a first circulating pipeline, and the second output end of the circulating pump is communicated with a warm air core of a cab through a second circulating pipeline and used for providing circulating power for the cooling liquid; the controller is electrically connected with the circulating pump and used for obtaining a current state signal of the vehicle and controlling starting and stopping of the circulating pump and connection and disconnection of the first circulating pipeline and / or the second circulating pipeline according to the current state signal of the vehicle so as to determine whether heat can be provided for the fuel tank and / or the cab or not. By means of the system, the fuel tank and / or the cab are / is heated through exhaust waste heat.

Description

Technical Field

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

[0002] When heavy-duty trucks are driving in cold areas in winter, the cold weather may cause poor driving comfort due to low temperature in the cab, and the fuel temperature in the fuel tank assembly exposed outdoors is too low, making the fuel wax unusable.

[0003] In the case of low temperature in the cab, a small oil tank is usually installed outside the cab, and an oil-burning boiler is set up inside the cab, and the small oil tank is used to supply oil to the boiler for heating, as a form of auxiliary heating. However, this auxiliary heating will cause additional fuel consumption and increase operating costs. At the same time, the exhaust gas generated by combustion will pollute the air and have an adverse effect on the driver and the atmospheric environment.

[0004] In order to solve the problem of low fuel tank temperature, a coolant pipeline is usually integrated into the fuel tank supply module to heat the fuel tank with engine coolant to ensure that the fuel in the tank is in liquid state. However, this method will increase the load of the cooling system and is not conducive to the thermal efficiency of the engine. Summary of the invention

[0005] The present invention provides an exhaust waste heat recovery system and a control method thereof, which utilizes the exhaust waste heat to heat the fuel tank and the cab when the temperature is low according to the current state signal of the vehicle, thereby saving energy and reducing emissions.

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

[0007] A coolant filling tank, used for providing coolant;

[0008] The exhaust tail pipe water jacket is encircled at the end of the exhaust tail pipe of the vehicle and is connected to the coolant filling tank, and is used to obtain exhaust energy from the exhaust tail pipe to heat the coolant;

[0009] A circulation pump, wherein the input end of the circulation pump is connected to the exhaust tail pipe water jacket, the first output end is connected to the heat exchanger of the fuel tank through the first circulation pipeline, and the second output end is connected to the heater core of the cab through the second circulation pipeline, so as to provide circulation power for the coolant;

[0010] The controller is electrically connected to the circulation pump and is used to obtain a current state signal of the vehicle and control the start and stop of the circulation pump and the connection and disconnection of the first circulation pipeline and / or the second circulation pipeline according to the current state signal of the vehicle to determine whether to heat the fuel tank and / or the cab.

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

[0012] The controller is also electrically connected to the first switch and is used to control the on and off of the first switch according to the current state signal of the vehicle to determine whether to heat the fuel tank.

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

[0014] The controller is also electrically connected to the second switch and is used to control the on and off of the second switch according to the current state signal of the vehicle to determine whether to heat the cab.

[0015] In a second aspect, the present invention provides a control method for an exhaust waste heat recovery system, which is applied to the above-mentioned exhaust waste heat recovery system, and the method is executed by a controller;

[0016] Methods include:

[0017] Get the vehicle's current status signal;

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

[0019] Optionally, the vehicle current status signal includes a current exhaust tail pipe 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 vehicle current status signal, controlling the start and stop of the circulation pump, and the on and off of the first circulation pipeline and / or the second circulation pipeline to determine whether to heat the fuel tank and / or the cab, includes:

[0021] When the current exhaust tail pipe 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, the circulation pump is controlled to be turned on, and the first circulation pipeline and the second circulation pipeline are connected to heat the fuel tank and the cab;

[0022] When at least one of the current exhaust tail pipe 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 turned off, and the first circulation pipeline and / or the second circulation pipeline are shut down to stop heating the fuel tank and / or the cab.

[0023] Optionally, when the current exhaust tail pipe 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, the circulating pump is controlled to be turned on, and the first circulating pipeline and the second circulating pipeline are connected, including:

[0024] When the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tail pipe end temperature signal is greater than or equal to the second preset threshold, and the current fuel tank temperature signal is less than or equal to the third preset threshold, the circulation pump is controlled to be turned on and the first circulation pipeline is turned on;

[0025] When the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tail pipe end temperature signal is greater than or equal to the second preset threshold, and the current cab temperature signal is less than the fourth preset threshold, the circulation pump is controlled to turn on and the second circulation pipeline is connected.

[0026] Optionally, when at least one of the current exhaust tail pipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal, and the current cab temperature signal does not satisfy a corresponding preset corresponding relationship, the circulating pump is controlled to be turned off, and the first circulating pipeline and / or the second circulating pipeline are shut off, including:

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

[0028] When the current nitrogen oxide concentration signal is less than a first preset threshold value, and the current exhaust tail pipe end temperature signal is less than a second preset threshold value, controlling the circulation pump to be turned off;

[0029] When the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tail pipe 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, the first circulation pipeline is controlled to be closed;

[0030] When the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tail pipe 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, the second circulation pipeline is controlled to be closed.

[0031] Optionally, the first circulation pipeline includes a first switch;

[0032] Controlling the circulation pump to start and the first circulation pipeline to be connected includes:

[0033] The circulation pump is controlled to be turned on, and the first switch is turned on.

[0034] Optionally, the second circulation pipeline includes a second switch;

[0035] Control the circulation pump to start, and the second circulation pipeline to conduct, including:

[0036] The circulating pump is controlled to be turned on, and the second switch is turned on.

[0037] The technical solution of the present invention is to put the exhaust tail pipe water jacket ring on the exhaust tail pipe, and to connect the input end of the circulation pump with the exhaust tail pipe water jacket, so that the first output end is connected with the heat exchanger of the fuel tank through the first circulation pipeline, and the second output end is connected with the warm air core of the cab through the second circulation pipeline, so that the gas discharged from the exhaust tail pipe can heat the coolant. The controller obtains the current state signal of the vehicle and controls the start and stop of the circulation pump, and the opening and closing of the first circulation pipeline and / or the second circulation pipeline according to the current state signal of the vehicle to determine whether to provide heat to the fuel tank and / or the cab. When the controller controls the circulation pump to start, and the first circulation pipeline and the second circulation pipeline are connected, the heated coolant flows to the heat exchanger of the fuel tank through the first circulation pipeline under the power of the circulation pump, and flows to the warm air core of the cab through the second circulation pipeline, so as to achieve heating of the fuel tank and heating of the cab; when the circulation pump is controlled to be closed, the heated coolant cannot flow to the first circulation pipeline and the second circulation pipeline, and 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 the cab, thereby saving energy and reducing emissions, reducing pollution, and improving the comfort of the driver in the cab.

[0038] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

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

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

[0043] Figure 4 A schematic diagram of the electrical structure of an exhaust waste heat recovery system provided by an embodiment of the present invention;

[0044] Figure 5A flow chart of a control method for a third exhaust waste heat recovery system provided by an embodiment of the present invention;

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

[0046] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0047] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0048] In one embodiment, Figure 1 This is a schematic diagram of the structure of an exhaust waste heat recovery system provided by an embodiment of the present invention. This embodiment can be applied to heavy trucks to use exhaust waste heat to heat the cab and fuel tank when the ambient temperature is low, so as to avoid the fuel tank being waxed and unusable due to low temperature, which causes poor driver comfort. The exhaust waste heat recovery system can be configured in electronic equipment. Figure 1As shown, the system includes: a coolant filling tank 1, which is used to provide coolant; an exhaust tail pipe water jacket 2, which is encircled at the end of the exhaust tail pipe of the vehicle and is connected to the coolant filling tank 1, and is used to obtain exhaust energy from the exhaust tail pipe to heat the coolant; a circulating pump 3, the input end of the circulating pump 3 is connected to the exhaust tail pipe water jacket 2, the first output end is connected to the heat exchanger of the fuel tank 4 through the first circulation pipeline 30, and the second output end is connected to the heater core of the cab 5 through the second circulation pipeline 20, which is used to provide circulation power for the coolant; a controller 6, the controller 6 is electrically connected to the circulating pump 3, and is used to obtain the current state signal of the vehicle, and according to the current state signal of the vehicle, controls the start and stop of the circulating pump 3, and the opening and closing of the first circulation pipeline 30 and / or the second circulation pipeline 20 to determine whether to provide heat to the fuel tank 4 and / or the cab 5.

[0049] Among them, the coolant filling tank 1 is used to store coolant and replenish it into the system when needed. In this embodiment, the coolant filling tank 1 is used to provide coolant so as to utilize the coolant for subsequent circulation. The drain tail pipe water jacket 2 is a device for protection and heat insulation, which can be put on the drain tail pipe of the vehicle. Its main function is to prevent heat loss or scalding risk caused by excessive surface temperature of the exhaust tail pipe, and it can also play a certain role in sound insulation and aesthetics. In this embodiment, when the drain tail pipe water jacket 2 is put on the exhaust tail pipe, it does not affect the catalytic reduction reaction of the post-treatment assembly, and the high-temperature nitrogen oxides can be discharged normally from the exhaust tail pipe. The high-temperature nitrogen oxides can heat the coolant and increase the temperature of the coolant. The circulating pump 3 is a device for providing circulation power to the coolant so that the coolant circulates in the system. In this embodiment, the input end of the circulation pump 3 is connected to the exhaust tail pipe water jacket 2, the first output end is connected to the heat exchanger of the fuel tank 4 through the first circulation pipeline 30, and the second output end is connected to the warm air core of the cab 5 through the second circulation pipeline 20. When the first circulation pipeline 30 is connected, the circulation pump 3 can circulate the heated coolant to the heat exchanger of the fuel tank 4 to heat the fuel tank 4, and when the second circulation pipeline 20 is connected, the circulation pump 3 can circulate the heated coolant to the warm air core in the cab to heat the cab. The controller 6 is the core control system of the system, which is electrically connected to the circulation pump 3 and controls the start and stop of the circulation pump 3, and the opening and closing of the first circulation pipeline 30 and / or the second circulation pipeline 20 according to the 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 tail pipe water jacket 2 is placed around the exhaust tail pipe, that is, placed around the outside of the exhaust tail pipe, which is an embracing arrangement. At this time, the high-temperature waste heat gas discharged by the vehicle through the exhaust tail pipe can heat the coolant flowing through the exhaust tail pipe water jacket 2, and 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 will obtain the vehicle's current state signal, which is a signal that can reflect the vehicle's current working state and the temperature in the cab. After the controller 6 obtains the vehicle's current state signal, it will control the circulating pump 3 to turn on or off according to the vehicle's current state signal, and control the conduction or disconnection of the first circulation pipeline 30 and / or the second circulation pipeline 20. When the controller 6 controls the circulation pump 3 to start according to the vehicle current state signal, and the first circulation pipeline 30 and the second circulation pipeline 20 are connected, the heated coolant flows to the heat exchanger of the fuel tank 4 through the first circulation pipeline 30 under the power of the circulation pump 3, so as to transfer the heat to the fuel tank 4 through the heat exchanger, thereby heating the fuel tank 4; at the same time, the heated coolant flows to the heater core in the cab through the second circulation 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 heating the cab 5. In addition, when the controller 6 controls the circulation pump 3 to stop according to the vehicle current state signal, and the first circulation pipeline 30 and / or the second circulation pipeline 20 are turned off, there is no power of the circulation pump 3 at this time, and the heated coolant will not enter the first circulation loop 10 and the second circulation loop 20, and will not provide heat to the fuel tank 4 and the cab 5.

[0051] The technical solution of the embodiment of the present invention is that the exhaust tail pipe water jacket is put on the exhaust tail pipe, and the input end of the circulation pump is connected to the exhaust tail pipe water jacket, the first output end is connected to the heat exchanger of the fuel tank through the first circulation pipeline, and the second output end is connected to the warm air core of the cab through the second circulation pipeline, so that the high-temperature waste heat gas discharged from the exhaust tail pipe can heat the coolant. The controller obtains the current state signal of the vehicle and controls the start and stop of the circulation pump, and the opening and closing of the first circulation pipeline and / or the second circulation pipeline according to the current state signal of the vehicle to determine whether to provide heat to the fuel tank and / or the cab. When the controller controls the circulation pump to start, and the first circulation pipeline and the second circulation pipeline are connected, the heated coolant flows to the heat exchanger of the fuel tank through the first circulation pipeline under the power of the circulation pump, and flows to the warm air core of the cab through the second circulation pipeline, so as to achieve heating of the fuel tank and heating of the cab; when the circulation pump is controlled to be closed, the heated coolant cannot flow to the first circulation pipeline and the second circulation pipeline, and 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 the cab, thereby saving energy, reducing emissions, and reducing pollution, while improving the comfort of the driver in the cab.

[0052] Optional, continue to refer to Figure 1 The first circulation pipeline 30 includes a first switch 301; the controller 6 is also electrically connected to the first switch 301, and is used to control the on-off of the first switch 301 according to the current state signal of the vehicle to determine whether to provide heat to the fuel tank 4.

[0053] The first switch 301 may include but is not limited to a solenoid valve.

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

[0055] Optional, continue to refer to Figure 1 The second circulation pipeline 20 includes a second switch 201; the controller 6 is also electrically connected to the second switch 201, and is used to control the on and off of the second switch 201 according to the current state signal of the vehicle to determine whether to provide heat to the cab.

[0056] The second switch 201 may include but is not limited to a solenoid valve.

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

[0058] In another specific embodiment, Figure 2 A flowchart of a control method for an exhaust waste heat recovery system provided by an embodiment of the present invention, the control method is applied to the above-mentioned exhaust waste heat recovery system, and the method is executed by a controller; Figure 2 As shown, the method includes:

[0059] S110, obtaining a vehicle current status signal.

[0060] S120: According to the vehicle current state signal, control the start and stop of the circulation pump, and the opening and closing of the first circulation pipeline and / or the second circulation pipeline 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 obtained, and the circulation pump is controlled to be turned on or off according to the vehicle current state signal, and the first circulation pipeline and / or the second circulation pipeline are controlled to be turned on or off. When the circulation pump is controlled to be turned on according to the vehicle current state signal, and the first circulation pipeline and the second circulation pipeline are turned on, the heated coolant flows to the heat exchanger of the fuel tank through the first circulation pipeline under the power of the circulation pump, 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 circulation pipeline, and the heat released by the coolant in the heater core heats the air flowing through it, and then the fan sends the hot air into the cab, thereby heating the cab. When the circulation pump is controlled to be turned off according to the vehicle current state signal, and the first circulation pipeline and / or the second circulation pipeline are turned off, there is no power of the circulation pump, and the heated coolant will not enter the first circulation loop and the second circulation loop, and will not provide heat to the fuel tank and the cab.

[0062] The technical solution of the embodiment of the present invention obtains the current state signal of the vehicle; according to the current state signal of the vehicle, the start and stop of the circulation pump and the opening and closing of the first circulation pipeline and / or the second circulation pipeline are controlled to determine whether to provide heat to the fuel tank and / or the cab. The above method can provide heat to the fuel tank and / or the cab, save energy and reduce emissions, reduce pollution, and improve the comfort of the driver in the cab.

[0063] In another alternative embodiment, Figure 3 This is a flow chart of a control method for a second exhaust waste heat recovery system provided in an embodiment of the present invention. This embodiment refines the specific implementation method of S120 in the above embodiment, controlling the start and stop of the circulation pump and the on and off of the first circulation pipeline and / or the second circulation pipeline according to the current state signal of the vehicle to determine whether to provide heat to the fuel tank and / or the cab. Figure 3 As shown, the method includes:

[0064] S210: Acquire a vehicle current status signal.

[0065] The vehicle current status signal includes a current exhaust tail pipe 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 method of acquiring the tail pipe end temperature signal may include but is not limited to acquiring it through a tail pipe temperature sensor disposed at the tail pipe end. The current method of acquiring the nitrogen oxide concentration signal may include but is not limited to acquiring it through a nitrogen oxide sensor disposed at the tail pipe end. In this embodiment, the acquired concentration can be measured by the vehicle's electronic control unit to determine whether it meets the national standard requirements. The current method of acquiring the fuel tank temperature signal may include but is not limited to acquiring it through a temperature sensor disposed on the fuel tank. The current method of acquiring the cab temperature signal may include but is not limited to acquiring it through a temperature sensor disposed in the cab.

[0067] S220. When the current exhaust tail pipe 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 relationships, the circulation pump is controlled to be turned on, and the first circulation pipeline and the second circulation pipeline are connected to provide heat to the fuel tank and the cab.

[0068] Among them, this step can be further refined as follows: when the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tail pipe terminal temperature signal is greater than or equal to the second preset threshold, and the current fuel tank temperature signal is less than or equal to the third preset threshold, the circulation pump is controlled to be turned on, and the first circulation pipeline is turned on; when the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tail pipe terminal temperature signal is greater than or equal to the second preset threshold, and the current cab temperature signal is less than the fourth preset threshold, the circulation pump is controlled to be turned on, and the second circulation pipeline is turned on.

[0069] Specifically, after obtaining the current tail pipe 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 tail pipe 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, the current tail pipe end temperature signal is greater than or equal to the second preset threshold, and the current fuel tank temperature signal is less than or equal to the third preset threshold, it indicates that the nitrogen oxide concentration signal is lower than the preset concentration standard, the exhaust temperature at the tail pipe end has reached the temperature required to provide heat using the 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 start, and the first circulating pipeline is connected, so that the heated coolant flows through the first circulating pipeline to the heat exchanger of the fuel tank under the power of the circulating pump, so as to realize the heat exchange of the fuel tank, so as to increase the temperature of the fuel tank and realize the heating of the fuel tank. Among them, the first preset threshold can be the national standard value of the average concentration of nitrogen oxides. For example, the first preset threshold within 1 hour is 200μg / m 3 The first preset threshold within 24 hours is 80 μg / m 3 The specific value can be determined according to the actual situation and is not limited here. The second preset threshold value can be 200°C. The third preset threshold value can be 4°C.

[0070] According to the acquired current tail pipe end temperature signal, current nitrogen oxide concentration signal and current cab temperature signal, when it is determined that the current nitrogen oxide concentration signal is less than the first preset threshold, the current tail pipe end temperature signal is greater than or equal to the second preset threshold, and the current cab temperature signal is less than the fourth preset threshold, it indicates that the nitrogen oxide concentration signal is lower than the preset concentration standard, the exhaust temperature at the tail pipe end reaches the temperature required to provide heat using the exhaust waste heat, and the cab temperature is too low, and the cab needs to be heated. At this time, the circulating pump is controlled to be turned on, and the second circulating pipeline is connected, so that the heated coolant flows through the second circulating pipeline to the warm air core of the cab under the power of the circulating pump, and the heated coolant releases heat to heat the air passing through, and then the fan sends the hot air into the cab to achieve the heating of the cab. Among them, the fourth preset threshold can be the air conditioning setting temperature in the cab. If the air conditioning setting temperature is 23°C, the fourth preset threshold is 23°C. It can be determined according to actual conditions and is not limited here.

[0071] S230. When at least one of the current exhaust tail pipe 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 turned off, and the first circulation pipeline and / or the second circulation pipeline are shut down to stop providing heat to the fuel tank and / or the cab.

[0072] Among them, this step can be refined as follows: when the current nitrogen oxide concentration signal is greater than or equal to the first preset threshold, control the circulation pump to be closed; when the current nitrogen oxide concentration signal is less than the first preset threshold, and the current exhaust tail pipe terminal temperature signal is less than the second preset threshold, control the circulation pump to be closed; when the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tail pipe terminal 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, control the first circulation pipeline to be closed; when the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tail pipe terminal 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, control the second circulation pipeline to be closed.

[0073] Specifically, after obtaining the current tail pipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal and the current cab temperature signal, if it is determined that at least one of the current tail pipe 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, it indicates that the current state of the vehicle is not sufficient to provide heat to the fuel tank and the cab using waste heat, then the circulation pump is controlled to be turned off, and the first circulation pipeline and / or the second circulation pipeline are shut off to stop providing heat to the fuel tank and / or the cab. In other words, when it is determined that the current nitrogen oxide concentration signal is greater than or equal to the first preset threshold value, it indicates that the vehicle currently emits too much nitrogen oxides, does not meet the national standards, and causes air pollution, then the circulation pump is controlled to be turned off 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 tail pipe terminal temperature signal is less than the second preset threshold, it indicates that the nitrogen oxide concentration meets the national standard, but the exhaust tail pipe terminal temperature is too low to meet the heat required to provide heat to the fuel tank and / or the cab using the exhaust waste heat, then the circulation pump is controlled to be closed to stop providing heat to the fuel tank and the cab, that is, no waste heat recovery is performed. When it is determined that the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tail pipe terminal 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 tail pipe terminal temperature meets the temperature required to provide heat, but the current temperature of the fuel tank is too high, there is no risk of wax hanging, and therefore the fuel tank does not need to be heated, then the first circulation pipeline is controlled to be closed, so that the heated coolant cannot flow to the fuel tank through the first circulation pipeline under the action of the circulation pump, and thus it is impossible to provide heat to the fuel tank. When it is determined that the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tail pipe terminal 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, and the exhaust tail pipe terminal temperature meets the temperature required to provide heat, but the current temperature in the cab has reached the preset temperature, and there is no need to continue to provide heat to the cab. Therefore, there is no need to heat the cab, then the second circulation pipeline is controlled to be shut off, so that the heated coolant cannot flow through the second circulation pipeline to the heater core of the cab under the action of the circulation pump, and thus the cab cannot be heated.

[0074] The technical solution of the embodiment of the present invention is to control the circulation pump to be turned on and the first circulation pipeline and the second circulation pipeline to be connected when it is determined that the current exhaust tail pipe terminal temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal and the current cab temperature signal all meet the corresponding preset corresponding relationship, so as to provide heat to the fuel tank and the cab; when at least one of the current exhaust tail pipe terminal temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal and the current cab temperature signal does not meet the corresponding preset corresponding relationship, the circulation pump is controlled to be turned off and the first circulation pipeline and / or the second circulation pipeline are shut off to stop providing heat to the fuel tank and / or the cab. By using the above method, by judging and determining the obtained vehicle current state signal, it is realized to provide heat to the fuel tank and / or the cab under the corresponding conditions, reduce vehicle consumption, save energy and reduce emissions, reduce pollution, and realize intelligent exhaust waste heat recovery.

[0075] Optionally, the first circulation pipeline includes a first switch; controlling the circulation pump to turn on, and the first circulation pipeline to be turned on, includes: controlling the circulation pump to turn on, and the first switch to be turned on.

[0076] Specifically, when controlling the first circulation pipeline to be turned on, this embodiment essentially controls the first switch to be turned on, thereby achieving the flow of coolant to the fuel tank.

[0077] Optionally, the second circulation pipeline includes a second switch; controlling the circulation pump to turn on, and the second circulation pipeline to be turned on, includes: controlling the circulation pump to turn on, and the second switch to be turned on.

[0078] Specifically, when controlling the conduction of the second circulation pipeline, this embodiment essentially controls the conduction of the second switch, thereby achieving the flow of coolant to the cab.

[0079] In another specific embodiment, Figure 4 A schematic diagram of the electrical structure of an exhaust waste heat recovery system provided by an embodiment of the present invention. Figure 5 A flowchart of a control method for a third exhaust waste heat recovery system provided in an embodiment of the present invention, referring to Figure 1 , Figure 4 and Figure 5 As shown, the method includes:

[0080] S1. Detection of emission pollutant measurement. According to the nitrogen oxide concentration value recorded by the nitrogen oxide sensor, the ECU performs measurement within the unit cycle condition, and transmits the signal to the controller of this system through the vehicle control unit (VCU) to determine whether it meets the national standard. If it meets the national standard, the next step is to make a judgment. If it does not meet the national standard, the circulation 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 tail pipe end temperature detection is carried out. The temperature model is collected based on the temperature sensor arranged at the exhaust tail pipe. The signal is transmitted to the controller of this system through the VCU to determine whether the exhaust tail pipe end temperature is higher than 200°C. When the exhaust temperature is higher than 200°C, the next step of judgment is carried out. Otherwise, the circulation pump is closed and waste heat recovery is not enabled.

[0082] S3. When it is detected that the nitrogen oxide concentration emission meets the national standard and the exhaust tail pipe end temperature is higher than 200°C, the waste heat recovery preparation stage is entered. At this time, it is necessary to determine whether to start waste heat recovery according to actual needs, and use the waste heat recovery energy to heat the target system that requires heat; the target system is the fuel tank and the cab;

[0083] S4. When it is detected that the nitrogen oxide concentration emission meets the national standard and the temperature at the end of the exhaust tail pipe is higher than 200°C, the fuel temperature is detected and the fuel temperature signal is transmitted to the VCU. The temperature signal is transmitted to the controller of this system through the VCU to determine whether the fuel temperature is lower than 4°C. When the oil temperature is lower than 4°C, the controller starts the circulation pump, and the waste heat recovery is turned on. At the same time, the fuel tank circuit solenoid valve is opened to use the waste heat to heat the fuel in the tank to ensure the best state of the fuel;

[0084] S5. When the fuel tank heating function is turned on, the cab temperature sensor obtains the real-time cab temperature, and sends the real-time cab temperature and the air-conditioning set temperature to the controller of this system through the VCU. When the cab temperature is lower than the air-conditioning set temperature, the cab heating circuit solenoid valve is opened, and the waste heat recovery is used for cab heating. Otherwise, the cab heating circuit solenoid valve is closed;

[0085] S6. When the fuel temperature is greater than 4°C, the fuel tank heating function is turned off, the cab temperature sensor obtains the real-time cab temperature, and sends the real-time cab temperature and air-conditioning set temperature to the controller of this system through VCU. When the cab temperature is lower than the air-conditioning set temperature, the solenoid valve of the cab heating circuit is opened, and the circulation pump is turned on at the same time. At this time, the waste heat recovery is used for cab heating. Otherwise, the solenoid valve of the cab heating circuit is closed and the circulation pump is turned off at the same time.

[0086] In one embodiment, Figure 6 is a structural block diagram of an electronic device provided by an embodiment of the present invention, such as Figure 6As shown, a schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0087] like Figure 6 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. 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] A number of 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 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 telecommunication networks.

[0089] The processor 11 may be a variety of general and / or special 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 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 executes the various methods and processes described above, such as the control method of the exhaust waste heat recovery system.

[0090] In some embodiments, the control method of the exhaust waste heat recovery system may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the control method of the exhaust waste heat recovery system described above may be executed. Alternatively, in other embodiments, the processor 11 may be configured to execute the control method of the exhaust waste heat recovery system in any other appropriate manner (e.g., by means of firmware).

[0091] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0092] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0093] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, 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 disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0094] To provide interaction with a user, the systems and techniques described herein may 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 trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0095] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may 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), a blockchain network, and the Internet.

[0096] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may 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 difficult management and weak business scalability in traditional physical hosts and VPS services.

[0097] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0098] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An exhaust waste heat recovery system, characterized in that: include: A coolant filling tank, used for providing coolant; An exhaust tail pipe water jacket, which is encircled at the end of the exhaust tail pipe of the vehicle and is connected to the coolant filling tank, and is used to obtain exhaust energy from the exhaust tail pipe to heat the coolant; A circulation pump, wherein the input end of the circulation 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 a first circulation pipeline, and the second output end is communicated with the heater core of the cab through a second circulation pipeline, for providing circulation power for the coolant; A controller is electrically connected to the circulation pump and is used to obtain a vehicle current status signal and control the start and stop of the circulation pump and the connection and disconnection of the first circulation pipeline and / or the second circulation pipeline according to the vehicle current status signal to determine whether to provide heat to the fuel tank and / or the cab.

2. The exhaust waste heat recovery system according to claim 1, characterized in that: The first circulation pipeline includes a first switch; The controller is also electrically connected to the first switch, and is used to control the on and off of the first switch according to the current state signal of the vehicle, so as to determine whether to provide heat to the fuel tank.

3. The exhaust waste heat recovery system according to claim 1, characterized in that: The second circulation pipeline includes a second switch; The controller is also electrically connected to the second switch and is used to control the on and off of the second switch according to the current state signal of the vehicle to determine whether to provide heat to the cab.

4. A control method for an exhaust waste heat recovery system, characterized in that: Applied to the exhaust waste heat recovery system according to any one of claims 1 to 3, the method is executed by the controller; The method comprises: Get the vehicle's current status signal; According to the vehicle current state signal, the start and stop of the circulation pump and the opening and closing of the first circulation pipeline and / or the second circulation pipeline are controlled to determine whether to provide heat to the fuel tank and / or the cab.

5. The control method according to claim 4, characterized in that: The vehicle current state signal includes a current exhaust tail pipe end temperature signal, a current nitrogen oxide concentration signal, a current fuel tank temperature signal and a current cab temperature signal.

6. The control method according to claim 5, characterized in that: According to the vehicle current state signal, the start and stop of the circulation pump and the opening and closing of the first circulation pipeline and / or the second circulation pipeline are controlled to determine whether to provide heat to the fuel tank and / or the cab, including: When the current exhaust tail pipe 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 circulation pump to start, and the first circulation pipeline and the second circulation pipeline to be connected, so as to provide heat to the fuel tank and the cab; When at least one of the current exhaust tail pipe 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 turned off, and the first circulation pipeline and / or the second circulation pipeline are shut down to stop providing heat to the fuel tank and / or the cab.

7. The control method according to claim 6, characterized in that: When the current exhaust tail pipe 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 circulation pump to start, and the first circulation pipeline and the second circulation pipeline to be connected, including: When the current nitrogen oxide concentration signal is less than a first preset threshold, the current exhaust tail pipe 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, controlling the circulation pump to start and the first circulation pipeline to be connected; When the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tail pipe 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 circulation pump is controlled to turn on and the second circulation pipeline is connected.

8. The control method according to claim 7, characterized in that: When at least one of the current exhaust tail pipe end temperature signal, the current nitrogen oxide concentration signal, the current fuel tank temperature signal, and the current cab temperature signal does not satisfy a corresponding preset corresponding relationship, controlling the circulation pump to be turned off, and the first circulation pipeline and / or the second circulation pipeline to be shut off, includes: When the current nitrogen oxide concentration signal is greater than or equal to the first preset threshold, controlling the circulation pump to be turned off; When the current nitrogen oxide concentration signal is less than a first preset threshold value, and the current exhaust tail pipe terminal temperature signal is less than a second preset threshold value, controlling the circulation pump to be turned off; When the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tail pipe 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, controlling the first circulation pipeline to be closed; When the current nitrogen oxide concentration signal is less than the first preset threshold, the current exhaust tail pipe 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, the second circulation pipeline is controlled to be closed.

9. The control method according to claim 7, characterized in that: The first circulation pipeline includes a first switch; Controlling the circulation pump to start and the first circulation pipeline to be connected includes: The circulation pump is controlled to be turned on, and the first switch is controlled to be turned on.

10. The control method according to claim 7, characterized in that: The second circulation pipeline includes a second switch; Controlling the circulation pump to start and the second circulation pipeline to be connected includes: The circulation pump is controlled to be turned on, and the second switch is controlled to be turned on.

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