Heat supply system for vehicle and control method for heat supply system

Abstract

The invention relates to the technical field of vehicle low-temperature starting, in particular to a heat supply system of a vehicle and a control method of the heat supply system. The heat supply system comprises a plurality of electric heating elements which are respectively arranged on functional parts of the vehicle; the first generator is arranged in an engine of the vehicle and is driven by the engine; the auxiliary power supply assembly is provided with a second generator and an auxiliary oil tank containing low-temperature-resistant fuel oil and is used for operating under the low-temperature working condition; wherein the plurality of electric heating elements are respectively and electrically connected with the first generator to form a first parallel structure in a circuit, and the second generator and the first generator form a second parallel structure in the circuit for supplying power to the electric heating elements and preheating functional parts of the vehicle in a low-temperature working condition. According to the heat supply system, the vehicle can be conveniently preheated through power supply of the second power generator in the low-temperature environment, and power supply of the first power generator is switched after the engine is started, so that the vehicle has both economical efficiency and practicability.

Description

Technical Field

[0001] The present invention relates to the technical field of low-temperature starting of vehicles, and in particular to a heating system of a vehicle and a control method of the heating system. Background Art

[0002] At present, vehicles powered by internal combustion engines often fail to start in winter or in areas with very low temperatures. This is because the viscosity of the lubricating oil in the engine increases greatly in a low-temperature environment, which increases the friction resistance between the contact surfaces of various components, thereby greatly increasing the torque required to start the engine. At the same time, the fuel will solidify and wax in a low-temperature environment. In the process of delivering fuel to the combustion chamber of the engine, the atomization effect of the fuel is extremely poor, and even ice will form and block the nozzle of the engine.

[0003] In the prior art, for vehicles temporarily parked in a low-temperature environment, the engine is often kept running to maintain the temperature of the vehicle to avoid the vehicle being unable to start smoothly after cooling down; for vehicles parked in a low-temperature environment for a long time, external heating is usually used to preheat the vehicle. For example, the vehicle is baked with a flame; an electric heating element is installed on the vehicle and powered by a municipal power supply. However, the use of external heating has problems such as low safety and limited scope of use. Therefore, there is an urgent need for a device that can easily preheat and start a vehicle in a low-temperature environment. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention provides a vehicle heating system to achieve the purpose of conveniently preheating and smoothly starting the vehicle in a low temperature environment.

[0005] In a first aspect, the present invention provides a vehicle heating system, the heating system comprising: A number of electric heating elements, each mounted on a functional component of the vehicle; a first generator disposed in the engine of the vehicle and driven by the engine; Auxiliary power supply assembly, equipped with a second generator and auxiliary fuel tank containing low-temperature resistant fuel, for operation in low-temperature conditions; Among them, several of the electric heating elements are electrically connected to the first generator respectively to form a first parallel structure in the circuit, and the second generator and the first generator form a second parallel structure in the circuit, which is used to power the electric heating elements in low temperature conditions to preheat the functional components of the vehicle.

[0006] According to a vehicle heating system provided by the present invention, the auxiliary power supply component also includes a heat exchanger arranged on the second generator, and the heat exchanger is connected to the engine through a pipeline for performing heat exchange with the coolant of the engine.

[0007] According to a vehicle heating system provided by the present invention, the auxiliary power supply component also includes a water pump, which is connected in series to a pipeline connecting the engine and the heat exchanger to drive the circulation of the engine's coolant.

[0008] According to a vehicle heating system provided by the present invention, the electric heating element includes a coolant heater, which is connected in series in a pipeline connecting the auxiliary power supply component and the engine to increase the temperature of the coolant.

[0009] According to a vehicle heating system provided by the present invention, the electric heating element further comprises a fuel heater for increasing the temperature of the fuel entering the engine.

[0010] According to a vehicle heating system provided by the present invention, the fuel heater is installed in the vehicle's oil pipeline, the oil pipeline connects the engine and the vehicle's main oil tank, and is used to deliver fuel to the engine; Alternatively, the fuel heater is installed in a fuel filter of the vehicle.

[0011] According to a vehicle heating system provided by the present invention, the electric heating element further comprises an air intake heater arranged in an air intake passage of the engine, for heating the air entering the engine.

[0012] According to a vehicle heating system provided by the present invention, the electric heating element further includes a urea heater for heating urea entering a post-processor of the vehicle.

[0013] In a second aspect, the present invention provides a method for controlling a heating system, which is applied to a heating system of any vehicle described above; When the ambient temperature is below zero degrees, the vehicle is started, and the auxiliary power supply component is controlled to run for a certain period of time to supply power to the electric heating element to preheat the functional components of the vehicle; then the engine is controlled to start, and the first generator is switched to supply power to the electric heating element.

[0014] According to a control method of a heating system provided by the present invention, the coolant temperature of the engine is obtained, and the real-time power of the auxiliary power supply component is controlled to be negatively correlated with the coolant temperature; The lower the coolant temperature is, the greater the real-time power is; and the higher the coolant temperature is, the smaller the real-time power is.

[0015] The above one or more technical solutions in the present invention have at least one of the following technical effects: By setting up an auxiliary power supply component, the heating system can use the second generator to supply power to the electric heating element in a low-temperature environment, conveniently preheating the vehicle, and switch the first generator to supply power to the electric heating element after starting the engine. This not only eliminates the problem of difficulty in starting the vehicle in a low-temperature environment, but also avoids excessive use of low-temperature resistant fuel, thereby improving the economy and practicality of the vehicle.

[0016] In addition to the technical problems solved by the present invention, the technical features of the technical solutions constituted, and the advantages brought about by the technical features of these technical solutions described above, other technical features of the present invention and the advantages brought about by these technical features will be further explained in conjunction with the accompanying drawings or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. 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 paying creative work.

[0018] Figure 1 A schematic structural diagram of a vehicle heating system provided in an embodiment of the present invention.

[0019] Figure 2 A schematic flow chart of a method for controlling a heating system provided in an embodiment of the present invention.

[0020] Reference numerals: 1. Engine; 2. Urea heater; 3. After-processor; 4. Auxiliary fuel tank; 5. Coolant heater; 6. Second generator; 7. Main fuel tank; 8. Fuel heater; 9. Intake air heater; 10. First generator; 11. Cabin heater; 12. Reserved power supply terminal. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0023] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0024] In the embodiments of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0026] In the present invention, low temperature resistant fuel refers to diesel fuel with a freezing point below zero and capable of maintaining a high combustion efficiency in a low temperature environment. For example, minus 35# diesel fuel can maintain normal combustion performance at an ambient temperature not lower than minus 35°C.

[0027] At present, vehicles powered by internal combustion engines often fail to start in winter or in areas with very low temperatures. For vehicles temporarily parked in a low-temperature environment, the engine 1 is often kept running to maintain the temperature of the vehicle to prevent the vehicle from failing to start smoothly after cooling down; for vehicles parked in a low-temperature environment for a long time, external heating is usually used to preheat the vehicle. For example, the vehicle is baked with a flame; an electric heating element is set on the vehicle and powered by a municipal power supply. However, the use of external heating has problems such as low safety and limited scope of use.

[0028] In order to solve the above problems, an embodiment of the present invention introduces a vehicle heating system.

[0029] like Figure 1 As shown, the heating system of the vehicle includes at least a plurality of electric heating elements, a first generator 10 and an auxiliary power supply component.

[0030] Specifically, the electric heating elements are installed on the functional components of the vehicle in a one-to-one correspondence. The first generator 10 is arranged in the engine 1 of the vehicle. In addition, the first generator 10 is connected to the engine 1 by transmission and driven by the engine 1. The auxiliary power supply assembly is provided with a second generator 6 and an auxiliary fuel tank 4. The auxiliary fuel tank 4 contains low-temperature resistant fuel, which is used to ensure the normal operation and power supply of the second generator 6 under low-temperature conditions.

[0031] Furthermore, in the circuit in which the first generator 10, the second generator 6 and all the electric heating elements are respectively connected, a number of the electric heating elements are respectively electrically connected to the first generator 10 to form a first parallel structure in the circuit. The second generator 6 and the first generator 10 form a second parallel structure in the circuit, which is used to supply power to the electric heating elements in low-temperature conditions and preheat the functional components of the vehicle, so that the heating system has two generators that can be switched to each other. Among them, the second generator 6 can operate in a low-temperature environment and supply power to the electric heating elements, conveniently preheating various functional components in the vehicle, eliminating factors such as fuel waxing and lubricating oil viscosity that hinder the start of the engine 1; the first generator 10 is driven by the engine 1, and after the engine 1 is started, the second generator 6 can be switched to the first generator 10 to supply power to the electric heating elements.

[0032] Therefore, low temperature resistant fuel can be added to the auxiliary fuel tank 4, and ordinary fuel can be added to the main fuel tank 7 for running the engine 1. The second generator 6 uses low temperature resistant fuel, and the engine 1 uses ordinary fuel, which takes into account both economy and practicality, and greatly saves the operation cost of the vehicle.

[0033] Furthermore, the power of each electric heating element can be adjusted according to the demand. Each electric heating element can be individually controlled to be turned on or off, so as to accurately adjust the temperature of any component in the vehicle. The power of the first generator 10 and / or the second generator 6 is controlled to be reduced or increased synchronously with the decrease or increase of the power demand of the electric heating element.

[0034] After the auxiliary power supply component is controlled to supply power to the electric heating element for a certain period of time, the engine 1 is started. After the engine 1 is started, the auxiliary power supply component is controlled to be turned off, and the first generator 10 is switched to supply power to the electric heating element.

[0035] In addition, when the coolant temperature in the engine 1 is too low, or the vehicle needs to be quickly heated, the power of the second generator 6 for heating the coolant is detected. If the power is less than a preset value, the coolant heater 5 is controlled to be turned on to heat the coolant.

[0036] In this embodiment, the vehicle's heating system is equipped with an auxiliary power supply component, which can use the second generator 6 to supply power to the electric heating element in a low-temperature environment, thereby conveniently preheating the vehicle, and after starting the engine 1, switching the first generator 10 to supply power to the electric heating element, which not only eliminates the problem of difficulty in starting the vehicle in a low-temperature environment, but also avoids excessive use of low-temperature resistant fuel, thereby improving the economy and practicality of the vehicle.

[0037] Based on the above embodiment, in another embodiment of the present invention, a vehicle heating system is introduced.

[0038] The auxiliary power supply assembly further includes a heat exchanger disposed on the second generator 6. The heat exchanger is connected to the engine 1 through a pipeline and is used for heat exchange with the coolant of the engine 1.

[0039] Furthermore, the auxiliary power supply assembly further includes a water pump. The water pump is connected in series to a pipeline connecting the engine 1 and the heat exchanger, and is used to drive the coolant of the engine 1 to circulate.

[0040] When the vehicle is preheated in a low temperature environment, the water pump draws the coolant in the engine 1 into the heat exchanger to exchange heat with the second generator 6. The second generator 6 heats the coolant while also cooling the second generator 6.

[0041] Specifically, the outlet for outputting the coolant in the engine 1 is located above the front end of the engine 1, and the inlet for inputting the coolant into the engine 1 is located below the rear end of the engine 1, so that the coolant can flow and circulate from bottom to top in the engine 1, ensuring that the coolant fully exchanges heat with the engine 1.

[0042] In a low temperature environment, the viscosity of the lubricating oil in the engine 1 increases, resulting in greater resistance to the transmission components stirring the lubricating oil. The heat exchanger heats the coolant of the engine 1 to increase the temperature in the engine 1, thereby heating the lubricating oil and reducing the viscosity of the lubricating oil, and finally starting the engine 1 smoothly.

[0043] Based on the above embodiment, in another embodiment of the present invention, a vehicle heating system is introduced.

[0044] The electric heating element comprises a coolant heater 5. The coolant heater 5 can be provided separately or integrated with the second generator 6.

[0045] When separately provided, the coolant heater 5 is connected in series in the pipeline connecting the auxiliary power supply assembly and the engine 1 to increase the temperature of the coolant. In this way, both the second generator 6 and the coolant heater 5 can heat the coolant.

[0046] When the coolant temperature is too low or the vehicle needs to be quickly heated, the power of the second generator 6 to heat the coolant is insufficient, and the coolant heater 5 can be controlled to be turned on to heat the coolant at the same time.

[0047] Based on the above embodiment, in another embodiment of the present invention, a vehicle heating system is introduced.

[0048] The electric heating element further includes a fuel heater 8, which is used to increase the temperature of the fuel entering the engine 1. Further, the fuel heater 8 is installed in the vehicle's oil pipeline, and the oil pipeline connects the engine 1 and the vehicle's main oil tank 7, which is used to deliver fuel to the engine 1. Alternatively, the fuel heater 8 is installed in the vehicle's fuel filter.

[0049] Preferably, the fuel heater 8 is disposed in the main fuel tank 7. For example, the fuel heater 8 is disposed on the oil float in the main fuel tank 7, and the fuel can be directly heated.

[0050] In a low-temperature environment, the vehicle cannot start smoothly sometimes because of fuel condensation. Although the vehicle can use low-temperature resistant fuel instead, the price of low-temperature resistant fuel is usually higher. In the present invention, by filling the auxiliary fuel tank 4 with low-temperature resistant fuel, the second generator 6 supplies power to the fuel heater 8, and then heats the ordinary fuel in the main fuel tank 7, the method of eliminating the condensation problem of ordinary fuel takes into account both economy and practicality.

[0051] Based on the above embodiment, in another embodiment of the present invention, a vehicle heating system is introduced.

[0052] The electric heating element further includes an air intake heater 9 disposed in the air intake passage of the engine 1 for heating the air entering the engine 1 .

[0053] For example, the air intake heater 9 is configured as an electric heating wire installed on the air intake passage of the engine 1. When the engine 1 is started, the second generator 6 energizes the electric heating wire, so that the electric heating wire generates heat and heats the air entering the engine 1.

[0054] Thus, the air and fuel supplied to the engine 1 can be heated simultaneously through the air intake heater 9 and the fuel heater 8, ensuring that the fuel can be fully atomized and fully mixed with the heated air, effectively improving the atomization effect of ordinary fuel in the engine 1, promoting the full combustion of ordinary fuel, improving energy utilization, and reducing pollutant emissions.

[0055] Based on the above embodiment, in another embodiment of the present invention, a vehicle heating system is introduced.

[0056] The air enters the engine 1 through the intake heater 9, and the fuel enters the engine 1 from the main fuel tank 7 through the fuel heater 8. The exhaust gas formed after the fuel and air are burned in the engine 1 enters the post-processor 3. The post-processor 3 needs to consume urea to process the exhaust gas.

[0057] The electric heating element further includes a urea heater 2 for heating urea entering a post-processor 3 of the vehicle. The post-processor 3 decomposes the exhaust gas using the heated urea and discharges the treated exhaust gas to the outside.

[0058] In addition, the electric heating element also includes a cabin heater 11 for increasing the temperature in the cabin.

[0059] like Figure 1 As shown, the heating system further includes a reserved power supply terminal 12 for supplying power to functional components added to the vehicle. The reserved power supply terminal 12 is arranged in parallel with the first generator 10 and / or the second generator 6.

[0060] In a second aspect, in another embodiment of the present invention, a control method for a heating system is introduced, which is applied to a heating system of a vehicle in any one of the above embodiments.

[0061] The heating system includes a first generator 10 for power supply and an auxiliary power supply assembly. The auxiliary power supply assembly is provided with a second generator 6 and an auxiliary fuel tank 4. The auxiliary fuel tank 4 contains low temperature resistant fuel oil, which is used to ensure the normal operation and power supply of the second generator 6 under low temperature conditions.

[0062] The heating system further includes electric heating elements electrically connected to the first generator 10 and the second generator 6, respectively, for preheating various functional components in the vehicle. The electric heating elements mainly include: urea heater 2, coolant heater 5, fuel heater 8, intake air heater 9 and cabin heater 11.

[0063] The heating system has two power supply modes: when the engine 1 is not started, the second generator 6 supplies power to the electric heating element; after the engine 1 is started, the first generator 1 supplies power to the electric heating element. Thus, the second generator 6 can operate in a low-temperature environment and supply power to the electric heating element, conveniently preheating various functional components in the vehicle, eliminating factors such as fuel waxing and lubricating oil viscosity that hinder the start of the engine 1; the first generator 10 is driven by the engine 1, and after the engine 1 is started, the second generator 6 can be switched to the first generator 10 to supply power to the electric heating element.

[0064] like Figure 1 As shown, when the ambient temperature is below zero, the vehicle is started, the auxiliary power supply component is controlled to run for a certain period of time, supply power to the electric heating element, and preheat the functional components of the vehicle. Then the engine 1 is controlled to start, and the first generator 10 is switched to supply power to the electric heating element.

[0065] Specifically, after the engine 1 is started, when the electric energy generated by the first generator 10 is sufficient to drive all the electric heating elements, the second generator 6 is controlled to be turned off.

[0066] In addition, the power of each electric heating element can be increased or decreased according to demand. When the demand for electricity decreases or increases, the power generation of the first generator 10 or the second generator 6 is synchronously reduced or increased. In addition, each electric heating element can be turned on or off separately.

[0067] For example, when the heat generated by the operation of the engine 1 is sufficient to heat the coolant, the coolant heater 5 is controlled to be turned off.

[0068] Based on the above embodiment, in another embodiment of the present invention, a control method for a heating system is introduced.

[0069] The coolant temperature of the engine 1 is obtained, and the real-time power of the auxiliary power supply component is controlled to be negatively correlated with the coolant temperature. Specifically, the lower the coolant temperature, the greater the real-time power; and the higher the coolant temperature, the smaller the real-time power.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle heating system, characterized in that: include: A number of electric heating elements, each mounted on a functional component of the vehicle; a first generator disposed in the engine of the vehicle and driven by the engine; Auxiliary power supply assembly, equipped with a second generator and auxiliary fuel tank containing low-temperature resistant fuel, for operation in low-temperature conditions; Among them, several of the electric heating elements are electrically connected to the first generator respectively to form a first parallel structure in the circuit, and the second generator and the first generator form a second parallel structure in the circuit, which is used to power the electric heating elements in low temperature conditions to preheat the functional components of the vehicle.

2. The vehicle heating system according to claim 1, characterized in that: The auxiliary power supply assembly also includes a heat exchanger disposed on the second generator, wherein the heat exchanger is connected to the engine through a pipeline and is used for exchanging heat with the coolant of the engine.

3. The vehicle heating system according to claim 2, characterized in that: The auxiliary power supply assembly also includes a water pump, which is connected in series to a pipeline connecting the engine and the heat exchanger to drive the circulation of the engine's coolant.

4. The vehicle heating system according to any one of claims 1 to 3, characterized in that: The electric heating element comprises a coolant heater which is connected in series in a pipeline connecting the auxiliary power supply assembly and the engine to increase the temperature of the coolant.

5. The vehicle heating system according to claim 4, characterized in that: The electric heating element also includes a fuel heater for increasing the temperature of the fuel entering the engine.

6. The vehicle heating system according to claim 5, characterized in that: The fuel heater is installed in the fuel pipeline of the vehicle, and the fuel pipeline connects the engine and the main fuel tank of the vehicle, and is used to deliver fuel to the engine; Alternatively, the fuel heater is installed in a fuel filter of the vehicle.

7. The vehicle heating system according to claim 5, characterized in that: The electric heating element also includes an air intake heater arranged in the air intake passage of the engine, which is used for heating the air entering the engine.

8. The vehicle heating system according to claim 7, characterized in that: The electric heating element also includes a urea heater for heating urea entering an aftertreatment device of the vehicle.

9. A method for controlling a heating system, characterized in that: A heating system for a vehicle according to any one of claims 1 to 8; When the ambient temperature is below zero degrees, the vehicle is started, and the auxiliary power supply component is controlled to run for a certain period of time to supply power to the electric heating element to preheat the functional components of the vehicle; then the engine is controlled to start, and the first generator is switched to supply power to the electric heating element.

10. The control method of the heating system according to claim 9, characterized in that: Acquiring the coolant temperature of the engine, and controlling the real-time power of the auxiliary power supply component to be negatively correlated with the coolant temperature; The lower the coolant temperature is, the greater the real-time power is; and the higher the coolant temperature is, the smaller the real-time power is.

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