Passenger car heating system and arrangement method

Abstract

The invention discloses a passenger car warm air system and an arrangement method, the passenger car warm air system comprises a driving assembly, the driving assembly comprises an engine, the engine is connected with a heating device, the engine is connected with a heating device, the engine is made to present at least two states by adjusting a valve assembly, in the first state, the engine does not work, and in the second state, the engine does not work; and in the second state, the engine works and continuously generates heat, and the heat generated by the engine is replaced so that the temperature of the engine can be kept within the preset temperature range. The engine is preheated through the heating device, so that the engine can rapidly meet the ignition condition in the ultralow temperature environment of-40 DEG C to-25 DEG C, normal use of the vehicle is guaranteed, and the adaptive capacity of the whole vehicle to the environment temperature is improved; the heating device is matched with the heating device, so that the engine of the passenger car can be switched between the first state and the second state, cold start of the engine is achieved in the ultralow-temperature environment, and the compartment can be rapidly heated in the ultralow-temperature environment.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile heating, and in particular to a passenger car heating system and a layout method thereof. Background Art

[0002] Buses need heating to ensure passengers stay comfortable in cold weather. A bus's heating system provides heating, temperature, and humidity control. In cooler seasons or regions, the heating system can be used to heat the bus interior, raising the temperature.

[0003] Currently, conventional fuel-powered buses can only operate normally in low-temperature environments above -25°C, which is still limited compared to the low temperatures found in Sichuan and parts of Northeast China. Because ambient temperatures in these areas can easily drop to ultra-low temperatures (-40°C to -25°C), the vehicle engine itself is too cold in these low temperatures, and the fuel viscosity is insufficient for combustion. Consequently, the engine struggles to operate, and the bus's radiator also fails to function properly. Summary of the Invention

[0004] The present invention provides a bus heating system and an arrangement method thereof, which can solve the problems raised in the background technology.

[0005] A passenger car heating system includes a drive assembly, the drive assembly includes an engine, the engine is connected to a heating device, and the heating device is used to preheat the engine;

[0006] The engine is connected to a heating device, and the heating device is used for heating the vehicle;

[0007] It also includes a valve assembly, the valve assembly is connected to the heating device and the heating device, and the engine is made to present at least two states by adjusting the valve assembly;

[0008] In the first state, the engine is not operating and is in a temperature-elevated state;

[0009] In the second state, the engine operates and continuously generates heat, and the heat generated by the engine is replaced so that its own temperature is maintained within a preset temperature range.

[0010] Preferably, the heating device includes a heater, the output end of the heater is connected to a water flow branch pipe, and the water flow branch pipe is used to transport the heating medium to the engine.

[0011] Preferably, the heating device includes a water flow pipeline, the water flow pipeline is a ring pipeline, and the water flow pipeline is connected to the engine.

[0012] Preferably, the water flow pipeline is connected to the input end of the heater for providing heating medium to the heater.

[0013] Preferably, the water flow pipeline is provided with a main radiator and a plurality of auxiliary radiators in sequence along the flow direction of the heating medium, and the heat displaced by the auxiliary radiators is used to pass into the automobile compartment.

[0014] Preferably, the water flow branch pipe is connected to the water flow pipeline, so that the heater is connected in series with the main radiator and several auxiliary radiators.

[0015] Preferably, the valve assembly includes a first valve and a second valve, the first valve is arranged in the engine cold start water flow branch pipe, the second valve is arranged in the heating water flow pipeline, and the second valve is located between the main radiator and the auxiliary radiator.

[0016] Preferably, the drive assembly further comprises an oil tank, the oil tank is connected to a heatable oil pipeline, and the oil pipeline is connected to the engine.

[0017] Preferably, the oil pipeline is provided with at least one filter, and a heating jacket is provided on the surface of the filter.

[0018] A method for arranging a bus heater, using the aforementioned bus heater system, comprises:

[0019] Based on the external ambient temperature, determine whether the engine is in an ultra-low temperature environment;

[0020] In an ultra-low temperature environment, the valve assembly is adjusted and the heating device preheats the engine to bring the engine into a first state;

[0021] When the engine temperature rises to the operating temperature, the engine is started, the valve assembly is adjusted, and the heating device and the heating device are turned off or on according to the actual temperature in the vehicle compartment, so that the engine is in the second state.

[0022] Beneficial effects of the present invention:

[0023] (1) In the present invention, the engine is preheated by a heating device so that it can quickly reach ignition conditions and operate in an ultra-low temperature environment of -40°C to -25°C, thereby ensuring the normal use of the vehicle and improving the adaptability of the entire vehicle to the ambient temperature.

[0024] (2) In the present invention, the heating device and the heating device cooperate to enable the engine of the bus to switch between the first state and the second state, realize the cold start of the engine in an ultra-low temperature environment, and realize the heating of the compartment.

[0025] (3) In the present invention, the heatable oil pipeline can heat the fuel, reduce the viscosity of the fuel, and facilitate engine starting. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a passenger car heating system according to the present invention;

[0027] Figure 2 for Figure 1 Schematic diagram of the connection between the central heating device, heating device, valve assembly and engine;

[0028] Figure 3 for Figure 1 Schematic diagram of the structure of the middle drive component;

[0029] Figure 4 A schematic diagram of the connection between the heating device, the heating device, the valve assembly and the engine in one embodiment;

[0030] Figure 5 The present invention is a flowchart of a method for arranging heaters in a passenger car.

[0031] Description of reference numerals:

[0032] 1. Engine; 2. Fuel tank; 3. Fuel pipe; 4. First filter; 5. Second filter; 6. Heating device; 61. Water pipe; 62. Main radiator; 63. Auxiliary radiator; 7. Heating device; 71. Heater; 72. Water branch pipe; 8. Valve assembly; 81. First valve; 82. Second valve. DETAILED DESCRIPTION

[0033] The specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0034] The inventors discovered that conventional fuel-powered buses can only operate normally in low-temperature environments above -25°C, which is still limited compared to the low-temperature environments in Sichuan and parts of Northeast China. Because the ambient temperature in these areas easily drops to ultra-low temperatures (-40°C to -25°C), the engine's temperature is too low at ultra-low temperatures, and the viscosity of the fuel cannot meet combustion conditions. As a result, the engine struggles to operate, causing the bus's radiator to also malfunction.

[0035] There are currently three common solutions. One is to program the car to start intermittently in low-temperature environments to maintain engine temperature. While this method can be effective in ultra-low-temperature environments, it can accelerate engine component wear, increase battery consumption, waste fuel, and increase emissions.

[0036] The second approach involves adding a heater wire to the engine's air intake to heat the incoming air. While this approach can improve cold-start performance and combustion efficiency, it can also lead to increased fuel consumption, increased battery strain, increased engine load, and the risk of system failure. Therefore, when adopting this measure, its benefits must be weighed against potential drawbacks. Implementation also requires integration with other auxiliary systems (such as battery management) to balance the adverse effects, and it can also increase the complexity of vehicle and system design.

[0037] The third method is to heat the engine's intake air and install an air reservoir to store the hot air, while simultaneously using a heating wire to heat the heating medium to achieve a cold start. However, this method is often used in temperatures above -25°C because the car battery will be depleted in ultra-low temperatures and insufficient to support the simultaneous use of high-power electrical appliances.

[0038] like Figure 1 、 Figure 3 As shown, the present invention provides a bus heating system comprising a drive assembly, comprising an engine 1 and a fuel tank 2, connected to a heatable fuel pipe 3. Fuel pipe 3 utilizes an electrically heated fuel pipe, which heats the fuel, reducing its viscosity and facilitating starting of engine 1. In some embodiments, where the vehicle is exposed to ultra-low temperatures (-25°C to -40°C), conventional electrically heated fuel pipes are less likely to rapidly heat the fuel. Therefore, an electric heating cable can be wrapped around the outer surface of fuel pipe 3 for auxiliary heating.

[0039] Fuel pipe 3 is connected to engine 1 and is used to transport fuel from fuel tank 2 to engine 1 for operation. Fuel pipe 3 is equipped with at least one filter, which is an oil filter. The filter removes particulate matter, impurities, dust, and dirt from the fuel through an internal filter element (or filter medium). As the fuel passes through the filter, impurities are captured by the filter element, and the cleaned fuel continues to flow into engine 1. A heating jacket is installed on the surface of the filter, which contains an electric heating element (such as a resistance wire, carbon fiber, or metal mesh). The heating element converts electrical energy into heat energy and evenly transfers it to the filter through its surface. This prevents the filter from clogging due to the high viscosity of the fuel flowing through the filter in ultra-low temperature environments.

[0040] In this embodiment, two filters are provided, namely a first filter 4 and a second filter 5. The first filter 4 performs coarse filtering on the fuel, and the second filter 5 performs fine filtering on the fuel after coarse filtering.

[0041] like Figure 1-Figure 2 As shown, the engine 1 is connected to a heating device 7 , and the heating device 7 is used to preheat the engine 1 .

[0042] Specifically, the heating device 7 includes a heater 71, the output end of the heater 71 is connected to a water branch pipe 72, and the water branch pipe 72 is used to transport a heating medium to the engine 1. The heating medium includes but is not limited to water, ethylene glycol, and propylene glycol. The heating medium can be selected according to the specific external environment.

[0043] The heating methods of heater 71 include, but are not limited to, electrical heating and fuel heating. In this embodiment, heater 71 utilizes fuel heating, i.e., a pipeline is provided between heater 71 and fuel tank 2. By activating the pump in heater 71, the fuel in fuel tank 2 serves as the fuel source for heater 71. Heater 71 burns the fuel, heating the heating medium flowing through heater 71. The heated heating medium then flows into engine 1, preheating the engine 1, which is idle in an ultra-low temperature environment.

[0044] Furthermore, the engine 1 is connected to a heating device 6 , which is used for heating the interior of the vehicle and collects heat by cooling the engine 1 .

[0045] Specifically, the heating device 6 includes a water flow pipe 61, which is a ring-shaped pipe connected to the engine 1. A main radiator 62 and several auxiliary radiators 63 are arranged in sequence along the flow direction of the heating medium. The heat displaced by the auxiliary radiators 63 is then transferred to the vehicle's interior to provide heating. The number of auxiliary radiators 63 can be adjusted based on the vehicle's specifications and type. In this embodiment, in passenger cars, which typically have a larger interior space and multiple heating ports, three or more auxiliary radiators 63 are provided to facilitate connection to multiple heating ports within the vehicle, enhancing passenger comfort. In some small sedans and off-road vehicles, the number of auxiliary radiators 63 can be reduced, or the auxiliary radiator 63 to which the heating port is connected can be adjusted. The closer the auxiliary radiator 63 is to the engine 1, the lower the heating temperature, allowing the heating temperature entering the vehicle interior to be adjusted to be closer to the body's perceived temperature.

[0046] Although the car is equipped with an external ventilation duct to transport air from the outside environment to the heating outlet, so that the outside air and the warm air delivered by the auxiliary radiator 63 are mixed to the perceived temperature, the higher the temperature of the warm air delivered by the auxiliary radiator 63, the more outside air is required, and the higher the flow rate of the warm air in the vehicle cabin. The high flow rate will gradually dry out the air in the vehicle cabin, which will reduce passenger comfort. Therefore, selecting an appropriate auxiliary radiator 63 at the source to connect to the vehicle's heating outlet not only regulates the heating temperature in the vehicle cabin, but also takes into account the humidity of the air in the vehicle cabin, further enhancing passenger comfort.

[0047] In some freight trucks, the cargo carried in the cargo compartment is not completely resistant to low temperatures, so additional temperature adjustment of the cargo compartment is required. However, the temperature requirements of the cargo compartment and the cab are different, so multiple auxiliary radiators 63 can be connected to the heating delivery ports in the cargo compartment and the cab respectively.

[0048] The water flow branch pipe 72 is connected to the water flow pipeline 61 , so that the heater 71 is connected in parallel with the main radiator 62 and the plurality of auxiliary radiators 63 .

[0049] In this embodiment, the water flow pipeline 61 is connected to the input end of the heater 71 for providing heating medium to the heater 71 .

[0050] In some embodiments, as Figure 4 As shown, the water flow pipeline 61 is not connected to the heater 71, but the input and output ends of the heater 71 are both connected to a water flow branch pipe 72, so that the heating medium flowing into the main radiator 62 can flow through the heater 71 without passing through the heater 71, thereby avoiding the heater 71 being unable to be shut down due to a malfunction, resulting in the heating medium flowing out of the engine 1 being heated again, thereby avoiding the radiator from increasing the cooling load due to the malfunction of the heater 71.

[0051] like Figure 1-Figure 2 As shown, the bus heating system also includes a valve assembly 8, which is connected to the heating device 6 and the heating device 7. The valve assembly 8 includes a first valve 81 and a second valve 82. The first valve 81 is provided in the water branch pipe 72, and the second valve 82 is provided in the water pipe 61. The second valve 82 is located between the main radiator 62 and the auxiliary radiator 63.

[0052] By adjusting the opening and closing of the first valve 81 and the opening and closing of the second valve 82 in the valve assembly 8, the flow direction of the heating medium is changed, so that the engine 1 presents at least two states.

[0053] Before the bus starts in an ultra-low temperature environment, engine 1 is inoperative, second valve 82 is closed, and first valve 81 is opened. At this point, both main radiator 62 and auxiliary radiator 63 are inoperative. Heater 71 is activated, heating the heating medium. The heated heating medium flows through water branch pipe 72 into engine 1, preheating it. The heated medium then flows back through water pipe 61 to heater 71 for recirculation and heating. The temperature of engine 1 gradually rises until it reaches operating temperature. This represents engine 1's first state.

[0054] The engine 1 is preheated by the heating device 7 so that it can quickly reach the ignition condition and operate in an ultra-low temperature environment of -40°C to -25°C, ensuring the normal use of the vehicle and improving the adaptability of the vehicle to the ambient temperature.

[0055] After the engine 1 is preheated to the operating temperature, the switch of the oil pipeline 3 is turned on, and the fuel tank 2 supplies heated fuel to the engine 1, and the engine 1 is started. After the engine 1 starts, the heating device 7 and the heating device 6 are turned off or on according to the actual temperature in the vehicle compartment, and the second valve 82 is opened. The engine 1 continuously generates heat during operation, and the heat generated by the engine 1 and the heat generated by the heater 71 are carried to the main radiator 62 and the auxiliary radiator 63 through the heating medium in the water flow pipe 61. The main radiator 62 and the auxiliary radiator 63 dissipate the heat from the heating medium and transport the displaced heat to the vehicle compartment, so that the bus can still quickly heat the vehicle compartment in an ultra-low temperature environment. The heating medium after heat dissipation continuously cools the engine 1, so that the engine 1 always remains within the preset temperature range during operation. This is the second state of the engine 1.

[0056] In some embodiments, when the bus is parked or running some additional equipment, the engine 1 is in an idling state. Since the temperature of the engine 1 in the idling state is not high, relying solely on the heat of the engine 1 is not enough to provide a suitable heating temperature for the compartment. At this time, the engine 1 and the heater 71 in the bus heating arrangement system need to be turned on, and the first valve 81 and the second valve 82 are also turned on. The heater 71 is used to assist in heating the engine 1 to increase the heat replaced by the heating medium.

[0057] In one embodiment, if Figure 5 As shown, the present invention provides a bus heater arrangement method using a bus heater system. The bus heater arrangement method includes:

[0058] Based on the ambient temperature, it is determined whether the engine 1 is in an ultra-low temperature environment. When the bus is traveling in autumn and winter or in some areas of Sichuan and Northeast China, the ambient temperature often drops to an ultra-low temperature of -40°C to -25°C.

[0059] In an ultra-low temperature environment, the valve assembly 8 is adjusted and the heating device 7 preheats the engine 1 so that the engine 1 is in the first state.

[0060] When the temperature of the engine 1 rises to the operating temperature, the engine 1 is started, the valve assembly 8 is adjusted, the heating device 7 is turned off, and the heating device 6 dissipates heat from the engine 1, so that the engine 1 is in the second state to achieve heating in the vehicle compartment.

[0061] The specific steps are as follows:

[0062] S1. Observe the outdoor temperature detector in the bus to determine whether the engine 1 is in an ultra-low temperature environment. If so, execute S2. If not, start the engine 1 directly.

[0063] S2. Turn on the heater 71 and the internal water pump, open the first valve 81, and close the second valve 82. At this point, the engine 1 is not operating, and the main radiator 62 and auxiliary radiator 63 are also not operating. After the heater 71 is turned on, it can heat the heating medium. The heated heating medium flows into the engine 1 through the water flow branch pipe 72, preheating the engine 1. It then flows back to the heater 71 through the water flow pipe 61 for circulating heating. During this process, the temperature of the engine 1 gradually increases until it reaches the operating temperature. This is the first state of the engine 1.

[0064] S3. Turn on the switch of fuel pipe 3, and fuel tank 2 delivers fuel to engine 1. During the fuel delivery process, fuel pipe 3 heats the fuel to prevent the high viscosity of the fuel at ultra-low temperatures from affecting the delivery speed and starting of engine 1. First filter 4 and second filter 5 filter the fuel, and the filtered fuel flows into engine 1.

[0065] It can be understood that the heating sleeves on the outer surfaces of the first filter 4 and the second filter 5 can heat the filters at ultra-low temperatures. On the one hand, this can prevent the filter temperature from being too low and affecting the delivery speed of the heated fuel. On the other hand, it can also improve the heating efficiency and heating effect of the fuel, making it easier to reduce the viscosity of the fuel more quickly and avoid clogging the core inside the filter due to excessive viscosity of the fuel.

[0066] S4, starting the engine 1. After the engine 1 starts, the first valve 81 and the heater 71 are closed, and the second valve 82 is opened.

[0067] The engine 1 continuously generates heat during operation, and the heat generated by the engine and the heat generated by the heater 71 are carried to the main radiator 62 and the auxiliary radiator 63 through the heating medium in the water flow pipe 61. The main radiator 62 and the auxiliary radiator 63 dissipate the heat from the heating medium and transport the displaced heat to the passenger compartment in the form of warm air, thereby increasing the temperature inside the compartment.

[0068] The heating medium after heat dissipation continuously cools the engine 1 so that the engine 1 is always in a preset temperature range during operation. This is the second state of the engine 1 .

[0069] The preset temperature range can be comprehensively calculated based on the working status of the engine 1 (including but not limited to the service life, frequency of use, and vehicle specifications of the engine 1) and the temperature of the external environment. The specific calculation method is a routine skill of those skilled in the art, so it will not be elaborated here.

[0070] The above disclosures are only a few specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A passenger car heating system, comprising a drive assembly, wherein the drive assembly comprises an engine (1), characterized in that: The engine (1) is connected to a heating device (7), and the heating device (7) is used to preheat the engine (1); The engine (1) is connected to a heating device (7) and a heating device (6), and the engine (1) and the heating device (7) are used for heating the interior of the vehicle through the heating device (6); It also includes a valve assembly (8), the valve assembly (8) is connected to the heating device (6) and the heating device (7), and the engine (1) is made to present at least two states by adjusting the valve assembly (8); In the first state, the engine (1) is not operating and is in a temperature-increasing state; In the second state, the engine (1) operates and continuously generates heat, and the heat generated by the engine (1) is replaced so that its own temperature is maintained within a preset temperature range.

2. A passenger car heating system according to claim 1, characterized in that: The heating device (7) comprises a heater (71), the output end of the heater (71) is connected to a water flow branch pipe (72), and the water flow branch pipe (72) is used to transport a heating medium for increasing temperature to the engine (1).

3. A passenger car heating system according to claim 2, characterized in that: The heating device (6) comprises a water flow pipeline (61), the water flow pipeline (61) is an annular pipeline, and the water flow pipeline (61) is connected to the engine (1).

4. A passenger car heating system according to claim 3, characterized in that: The water flow pipeline (61) is connected to the input end of the heater (71) and is used to provide heating medium to the heater (71).

5. A passenger car heating system according to claim 3, characterized in that: The water flow pipeline (61) is provided with a main radiator (62) and a plurality of auxiliary radiators (63) in sequence along the flow direction of the heating medium. The heat displaced by the auxiliary radiators (63) is used to pass into the automobile compartment.

6. A passenger car heating system according to claim 5, characterized in that: The water flow branch pipe (72) is connected to the water flow pipeline (61), so that the heater (71) is connected in parallel with the main radiator (62) and a plurality of auxiliary radiators (63).

7. A passenger car heating system according to claim 5, characterized in that: The valve assembly (8) comprises a first valve (81) and a second valve (82), wherein the first valve (81) is arranged on the water flow branch pipe (72), and the second valve (82) is arranged on the water flow pipeline (61), and the second valve (82) is located between the main radiator (62) and the auxiliary radiator (63).

8. A passenger car heating system according to claim 1, characterized in that: The drive assembly further comprises an oil tank (2), the oil tank (2) being connected to a heatable oil delivery pipe (3), and the oil delivery pipe (3) being connected to the engine (1).

9. A passenger car heating system according to claim 8, characterized in that: The oil delivery pipe (3) is provided with at least one filter, and a heating jacket is provided on the surface of the filter.

10. A method for arranging a bus heater, using a bus heater system according to any one of claims 1 to 9, characterized in that: include: Based on the external ambient temperature, determining whether the engine (1) is in an ultra-low temperature environment; In an ultra-low temperature environment, the valve assembly (8) is adjusted, and the heating device (7) preheats the engine (1), so that the engine (1) is in a first state; When the temperature of the engine (1) rises to the operating temperature, the engine (1) is started, the valve assembly (8) is adjusted, and the heating device (7) and the heating device (6) are turned off or on according to the actual temperature in the vehicle compartment, so that the engine (1) presents a second state.

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