Compressed natural gas and liquefied natural gas hybrid gas supply system and vehicle

Abstract

The application relates to the technical field of vehicle parts, in particular to a compressed natural gas and liquefied natural gas mixed gas supply system and a vehicle, wherein the compressed natural gas and liquefied natural gas mixed gas supply system comprises a compressed natural gas gas supply system, a liquefied natural gas gas supply system, a heating system and a control system; the compressed natural gas gas supply system comprises a compressed natural gas high-pressure connection inlet, a compressed natural gas electromagnetic valve, a pressure reducer and a low-pressure gas supply connection inlet; the liquefied natural gas gas supply system comprises a liquefied natural gas liquid inlet, a liquefied natural gas liquid inlet electromagnetic valve, a vaporizer, a buffer tank, a liquefied natural gas gas supply electromagnetic valve and a pressure stabilizing tank; and the heating system is connected with the pressure reducer and the vaporizer respectively. The compressed natural gas gas supply system and the liquefied natural gas gas supply system are integrated together, so that the workload of vehicle arrangement is simplified.

Description

Technical Field

[0001] This application relates to the field of vehicle component technology, and in particular to a compressed natural gas and liquefied natural gas mixed gas supply system and vehicle. Background Technology

[0002] my country has a vast territory, a well-developed logistics and transportation industry, and a diverse energy system. Compressed natural gas (CNG) and liquefied natural gas (LNG) each have their own price advantages in different regions. As a result, CNG and LNG hybrid fuel trucks have emerged.

[0003] Existing hybrid trucks have two independent gas supply systems, making the installation of these systems a significant undertaking. Summary of the Invention

[0004] This application provides a mixed gas supply system and vehicle for compressed natural gas and liquefied natural gas, which solves the problem that existing mixed fuel trucks have two independent gas supply systems, resulting in a large workload for setting up the gas supply system.

[0005] This application provides a mixed gas supply system for compressed natural gas and liquefied natural gas, including a compressed natural gas supply system, a liquefied natural gas supply system, a heating system, and a control system;

[0006] The compressed natural gas supply system includes a compressed natural gas high-pressure inlet, a compressed natural gas solenoid valve, a pressure reducer, and a low-pressure supply inlet connected in sequence.

[0007] The liquefied natural gas (LNG) supply system includes, in sequence, an LNG inlet inlet, an LNG inlet solenoid valve, a vaporizer, a buffer tank, an LNG supply solenoid valve, and a pressure stabilizing tank, with the pressure stabilizing tank connected to the low-pressure supply inlet.

[0008] The heating system is connected to the pressure regulator and the vaporizer respectively, and the heating system is configured to heat the pressure regulator and the vaporizer.

[0009] The control system is communicatively connected to the compressed natural gas solenoid valve, the liquefied natural gas inlet solenoid valve, and the liquefied natural gas supply solenoid valve, respectively.

[0010] The control system is configured to control the opening of the compressed natural gas solenoid valve and the closing of the liquefied natural gas inlet solenoid valve and the liquefied natural gas supply solenoid valve, so as to enable the compressed natural gas supply system to operate.

[0011] The system controls the opening of the liquefied natural gas (LNG) inlet solenoid valve and the LNG supply solenoid valve, as well as the closing of the compressed natural gas (CNG) solenoid valve, to enable the LNG supply system to operate.

[0012] In one possible implementation, the compressed natural gas and liquefied natural gas mixed gas supply system provided in this application includes a controller, which is communicatively connected to a compressed natural gas solenoid valve, a liquefied natural gas inlet solenoid valve, and a liquefied natural gas supply solenoid valve, respectively.

[0013] The controller is configured to control the opening of the compressed natural gas solenoid valve and to control the closing of the liquefied natural gas inlet solenoid valve and the liquefied natural gas supply solenoid valve.

[0014] Controls the opening of the liquefied natural gas inlet solenoid valve and the liquefied natural gas supply solenoid valve, and controls the closing of the compressed natural gas solenoid valve.

[0015] In one possible implementation, the compressed natural gas and liquefied natural gas mixed gas supply system provided in this application includes a control system comprising a switching switch, which is communicatively connected to a controller, and the switching switch having a compressed natural gas setting and a liquefied natural gas setting.

[0016] The controller is configured to open the compressed natural gas solenoid valve and close the liquefied natural gas inlet solenoid valve and the liquefied natural gas supply solenoid valve when the switch is in the compressed natural gas position.

[0017] When the switch is in the liquefied natural gas (LNG) position, it controls the opening of the LNG inlet solenoid valve and the LNG supply solenoid valve, and controls the closing of the compressed natural gas (CNG) solenoid valve.

[0018] In one possible implementation, the compressed natural gas and liquefied natural gas mixed gas supply system provided in this application includes a heating system comprising a coolant inlet, a coolant diversion inlet, a coolant diversion outlet, and a coolant return outlet.

[0019] The coolant inlet and coolant return outlet are respectively connected to the cooling system in the vehicle;

[0020] The coolant branch inlets are connected to the coolant inlet, pressure regulator, and vaporizer, respectively.

[0021] The coolant branch outlets are connected to the coolant return port, pressure reducer, and vaporizer, respectively.

[0022] In one possible implementation, the compressed natural gas and liquefied natural gas mixed gas supply system provided in this application has a compressed natural gas solenoid valve having a heating unit configured to heat the natural gas passing through the compressed natural gas solenoid valve.

[0023] In one possible implementation, the compressed natural gas and liquefied natural gas mixed gas supply system provided in this application further includes a first temperature sensor in the heating system. The first temperature sensor and the heating unit are respectively connected in communication with the controller. The first temperature sensor is configured to acquire the temperature of the coolant.

[0024] The controller is configured to start the heating unit when the temperature obtained by the first temperature sensor is lower than the first preset temperature; and to shut down the heating unit when the temperature obtained by the first temperature sensor is greater than or equal to the first preset temperature.

[0025] In one possible implementation, the compressed natural gas and liquefied natural gas mixed gas supply system provided in this application further includes a second temperature sensor, which is communicatively connected to the controller and configured to acquire the temperature of the external environment.

[0026] The controller is configured to start one of the compressed natural gas supply system and the liquefied natural gas supply system to start the vehicle when the temperature obtained by the second temperature sensor is greater than or equal to a second preset temperature.

[0027] When the temperature obtained by the second temperature sensor is lower than the second preset temperature, the compressed natural gas supply system is started to start the vehicle.

[0028] In one possible implementation, the compressed natural gas and liquefied natural gas mixed gas supply system provided in this application has a controller configured to start the compressed natural gas supply system and heating unit to warm up the vehicle when the temperature obtained by the second temperature sensor is less than the second preset temperature and the temperature obtained by the first temperature sensor is less than the first preset temperature.

[0029] When the temperature obtained by the first temperature sensor is greater than or equal to the first preset temperature, the compressed natural gas supply system is shut down and the liquefied natural gas supply system is started, so that the vehicle can run normally using liquefied natural gas as fuel.

[0030] In one possible implementation, the compressed natural gas and liquefied natural gas mixed gas supply system provided in this application has a limiting element on the switching switch, the limiting element being communicatively connected to the controller, and the limiting element being configured to restrict the switching switch from the compressed natural gas setting to the liquefied natural gas setting;

[0031] The controller is configured to activate a control limiter when the temperature obtained by the second temperature sensor is lower than a second preset temperature, so as to limit the switching switch from compressed natural gas to liquefied natural gas.

[0032] When the temperature obtained by the first temperature sensor is greater than or equal to the first preset temperature, the control limiter closes, so that the switch can freely switch between compressed natural gas and liquefied natural gas.

[0033] This application also provides a vehicle, including a vehicle body and a mixed gas supply system for compressed natural gas and liquefied natural gas installed on the vehicle body, which is any of the above-mentioned technical solutions.

[0034] This application provides a compressed natural gas (CNG) and liquefied natural gas (LNG) mixed gas supply system and vehicle. The CNG and LNG mixed gas supply system integrates a CNG supply system, an LNG supply system, a heating system, and a control system. The CNG supply system provides CNG through a high-pressure CNG inlet, a CNG solenoid valve, a pressure reducer, and a low-pressure gas inlet. The LNG supply system provides LNG through a LNG liquid inlet, an LNG liquid inlet solenoid valve, a vaporizer, a buffer tank, an LNG gas supply solenoid valve, and a pressure stabilizing tank. The heating system heats the pressure reducer and vaporizer. The control system is configured to control the opening and closing of the CNG solenoid valves to operate the CNG supply system, and to control the opening and closing of the LNG liquid inlet and LNG gas supply solenoid valves to operate the LNG supply system. This integration of the CNG and LNG supply systems simplifies the overall vehicle layout. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0036] Figure 1 A schematic diagram of a mixed gas supply system for compressed natural gas and liquefied natural gas provided in an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100- Compressed natural gas supply system;

[0039] 110 - High-pressure inlet for compressed natural gas;

[0040] 120 - Compressed natural gas solenoid valve;

[0041] 130-Pressure reducer;

[0042] 140 - Low-pressure gas supply inlet;

[0043] 200-Liquefied Natural Gas Supply System;

[0044] 210 - Liquefied natural gas inlet;

[0045] 220 - Liquefied natural gas inlet solenoid valve;

[0046] 230 - Carburetor;

[0047] 240-Buffer tank;

[0048] 250-Liquefied Natural Gas Supply Solenoid Valve;

[0049] 260-Pressure stabilizing tank;

[0050] 300 - Heating system;

[0051] 310 - Coolant inlet;

[0052] 320 - Coolant diversion inlet;

[0053] 330 - Coolant diversion outlet;

[0054] 340 - Coolant return port;

[0055] 400-Control System;

[0056] 410 - Controller;

[0057] 420 - Toggle switch.

[0058] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0060] The terms "first," "second," "third," "fourth," etc. (if applicable) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the application described herein can be implemented, for example, in orders other than those illustrated or described herein. In embodiments of this application, the words "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0061] As mentioned in the background technology: my country has a vast territory, a well-developed logistics and transportation industry, and a rich and diverse energy system. Compressed natural gas and liquefied natural gas each have certain price advantages in different regions. Therefore, trucks using mixed fuels of compressed natural gas and liquefied natural gas have emerged.

[0062] Existing hybrid trucks have two independent gas supply systems, making the installation of these systems a significant undertaking.

[0063] To address the aforementioned technical problems, this application provides a compressed natural gas (CNG) and liquefied natural gas (LNG) mixed gas supply system and vehicle. The CNG and LNG mixed gas supply system comprises a CNG supply system, a LNG supply system, a heating system, and a control system. The CNG supply system provides CNG through a high-pressure CNG inlet, a CNG solenoid valve, a pressure reducer, and a low-pressure inlet. The LNG supply system provides LNG liquid inlet, a LNG liquid inlet solenoid valve, a vaporizer, a buffer tank, and a liquid... The system includes a compressed natural gas (CNG) supply solenoid valve and a pressure stabilizing tank to supply liquefied natural gas (LNG). A heating system is used to heat the pressure reducer and vaporizer. The control system is configured to control the opening of the CNG solenoid valve and the closing of the LNG inlet solenoid valve and the LNG supply solenoid valve to operate the CNG supply system. This integration of the CNG and LNG supply systems simplifies the overall vehicle layout.

[0064] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0065] refer to Figure 1 This application discloses a compressed natural gas and liquefied natural gas mixed gas supply system, including a compressed natural gas supply system 100, a liquefied natural gas supply system 200, a heating system 300 and a control system 400.

[0066] The compressed natural gas supply system 100 includes a compressed natural gas high-pressure inlet 110, a compressed natural gas solenoid valve 120, a pressure reducer 130, and a low-pressure supply inlet 140 connected in sequence.

[0067] The liquefied natural gas (LNG) supply system 200 includes an LNG inlet 210, an LNG inlet solenoid valve 220, a vaporizer 230, a buffer tank 240, an LNG supply solenoid valve 250, and a pressure stabilizing tank 260 connected in sequence. The pressure stabilizing tank is connected to the low-pressure supply inlet 140.

[0068] The heating system 300 is connected to the pressure reducer 130 and the vaporizer 230 respectively, and the heating system 300 is configured to heat the pressure reducer 130 and the vaporizer 230.

[0069] The control system 400 is communicatively connected to the compressed natural gas solenoid valve 120, the liquefied natural gas inlet solenoid valve 220, and the liquefied natural gas supply solenoid valve 250.

[0070] The control system 400 is configured to control the opening of the compressed natural gas solenoid valve 120 and the closing of the liquefied natural gas inlet solenoid valve 220 and the liquefied natural gas supply solenoid valve 250, so as to enable the compressed natural gas supply system 100 to operate.

[0071] The liquefied natural gas (LNG) inlet solenoid valve 220 and LNG supply solenoid valve 250 are opened, and the compressed natural gas (CNG) solenoid valve 120 is closed, so that the LNG supply system 200 can operate.

[0072] The compressed natural gas supply system 100 also includes a compressed natural gas high-pressure storage tank, which is used to store high-pressure natural gas and is connected to the compressed natural gas high-pressure inlet 110.

[0073] The liquefied natural gas supply system 200 also includes a liquefied natural gas tank, which stores liquefied natural gas and is used to connect to the liquefied natural gas inlet 210.

[0074] The low-pressure gas inlet 140 is connected to the vehicle's fuel inlet.

[0075] The heating system 300 is a branch of the engine cooling device in the vehicle. The heating system 300 is connected to the cooling device to reduce the production cost of the vehicle. Moreover, the temperature of the coolant in the engine cooling device is relatively high (the temperature of the coolant is generally above 80°C when the vehicle is running), so that the temperature of the coolant in the heating system 300 is maintained at a high temperature, thereby realizing the heating of the pressure reducer 130 and the carburetor 230.

[0076] By adopting the above technical solution, and by setting up a compressed natural gas (CNG) supply system 100, a liquefied natural gas (LNG) supply system 200, a heating system 300, and a control system 400, the CNG supply system 100 provides CNG through a high-pressure CNG inlet 110, a CNG solenoid valve 120, a pressure reducer 130, and a low-pressure supply inlet 140. The LNG supply system 200 provides LNG through a LNG inlet inlet 210, a LNG inlet solenoid valve 220, a vaporizer 230, a buffer tank 240, a LNG supply solenoid valve 250, and a pressure stabilizing tank 260. The gas heating system 300 is used to heat the pressure reducer 130 and the vaporizer 230. The control system 400 is configured to control the opening of the compressed natural gas solenoid valve 120 and the closing of the liquefied natural gas inlet solenoid valve 220 and the liquefied natural gas supply solenoid valve 250 to operate the compressed natural gas supply system 100, and to control the opening of the liquefied natural gas inlet solenoid valve 220 and the liquefied natural gas supply solenoid valve 250 and the closing of the compressed natural gas solenoid valve 120 to operate the liquefied natural gas supply system 200. This integrates the compressed natural gas supply system 100 and the liquefied natural gas supply system 200, simplifying the overall vehicle layout.

[0077] In some embodiments, the control system 400 includes a controller 410, which is communicatively connected to the compressed natural gas solenoid valve 120, the liquefied natural gas inlet solenoid valve 220, and the liquefied natural gas supply solenoid valve 250, respectively.

[0078] The controller 410 is configured to control the opening of the compressed natural gas solenoid valve 120 and to control the closing of the liquefied natural gas inlet solenoid valve 220 and the liquefied natural gas supply solenoid valve 250.

[0079] The solenoid valve 220 for liquefied natural gas inlet and the solenoid valve 250 for liquefied natural gas supply are controlled to open, and the solenoid valve 120 for compressed natural gas is controlled to close.

[0080] For example, the control system 400 also includes communication cables, through which the controller 410 is communicatively connected to the compressed natural gas solenoid valve 120, the liquefied natural gas inlet solenoid valve 220 and the liquefied natural gas supply solenoid valve 250 respectively.

[0081] For example, the controller 410 can control the switching between the compressed natural gas supply system 100 and the liquefied natural gas supply system 200 via touch screen or voice control.

[0082] By adopting the above technical solution and setting up the controller 410, it is convenient to communicate and control the compressed natural gas solenoid valve 120, the liquefied natural gas inlet solenoid valve 220 and the liquefied natural gas supply solenoid valve 250, thereby controlling the switching between the compressed natural gas supply system 100 and the liquefied natural gas supply system 200.

[0083] In some embodiments, the control system 400 includes a switch 420, which is communicatively connected to the controller 410. The switch 420 has a compressed natural gas setting and a liquefied natural gas setting.

[0084] The controller 410 is configured to control the opening of the compressed natural gas solenoid valve 120 and the closing of the liquefied natural gas inlet solenoid valve 220 and the liquefied natural gas supply solenoid valve 250 when the switch 420 is in the compressed natural gas position.

[0085] When the switch 420 is in the liquefied natural gas (LNG) position, it controls the LNG inlet solenoid valve 220 and the LNG supply solenoid valve 250 to open and the compressed natural gas (CNG) solenoid valve 120 to close.

[0086] For example, controller 410 is connected to switch 420 via a communication cable.

[0087] By adopting the above technical solution and setting the switching switch 420, it is convenient for the driver to determine the specific gas supply system used by the vehicle at this time, and to switch between the compressed natural gas supply system 100 and the liquefied natural gas supply system 200 as needed.

[0088] In some embodiments, the heating system 300 includes a coolant inlet 310, a coolant branch inlet 320, a coolant branch outlet 330, and a coolant return outlet 340.

[0089] The coolant inlet 310 and the coolant return outlet 340 are respectively connected to the cooling system in the vehicle.

[0090] The coolant diversion inlet 320 is connected to the coolant inlet 310, the pressure reducer 130 and the vaporizer 230 respectively.

[0091] The coolant branch outlet 330 is connected to the coolant return port 340, the pressure reducer 130 and the vaporizer 230 respectively.

[0092] For example, the coolant diversion inlet 320 includes three coolant diversion inlets and a first three-way valve. The three valve ports of the first three-way valve are respectively connected to the three coolant diversion inlets, and the other ends of the three coolant diversion inlets are respectively connected to the coolant inlet 310, the pressure reducer 130 and the vaporizer 230.

[0093] The coolant distribution outlet 330 includes three coolant distribution pipes and a second three-way valve. The three valve ports of the second three-way valve are respectively connected to the three coolant distribution pipes, and the other ends of the three coolant distribution pipes are respectively connected to the coolant return port 340, the pressure reducer 130 and the vaporizer 230.

[0094] By adopting the above technical solution, and by setting up a coolant inlet 310, a coolant branch inlet 320, a coolant branch outlet 330, and a coolant return outlet 340, the coolant inlet 310 and the coolant return outlet 340 are respectively connected to the cooling device in the vehicle, so that the coolant in the cooling device can act as the medium in the heating system 300. The coolant branch inlet 320 is connected to the coolant inlet 310, the pressure reducer 130, and the carburetor 230, respectively. The coolant branch outlet 330 is connected to the coolant return outlet 340, the pressure reducer 130, and the carburetor 230, respectively, so that the coolant can enter the pressure reducer 130 and the carburetor 230, thereby heating the pressure reducer 130 and the carburetor 230.

[0095] In some embodiments, the compressed natural gas solenoid valve 120 has a heating unit configured to heat the natural gas passing through the compressed natural gas solenoid valve 120.

[0096] When the vehicle is in an extremely cold environment, the temperature of the coolant in the cooling device is low before the vehicle is started, which in turn results in a low temperature of the coolant in the heating system 300. This makes it impossible to effectively heat the pressure reducer 130 and the carburetor 230, thereby affecting the start-up of the compressed natural gas supply system 100 and the liquefied natural gas supply system 200.

[0097] By adopting the above technical solution, a heating unit is installed inside the compressed natural gas solenoid valve 120 to heat the natural gas passing through the compressed natural gas solenoid valve 120, thereby ensuring the normal use of the compressed natural gas supply system 100, ensuring that the vehicle can start and warm up smoothly in extremely cold environments, and improving the vehicle's environmental adaptability.

[0098] In some embodiments, the heating system 300 further includes a first temperature sensor, which and the heating unit are respectively communicatively connected to the controller 410, and the first temperature sensor is configured to acquire the temperature of the coolant.

[0099] The controller 410 is configured to start the heating unit when the temperature obtained by the first temperature sensor is less than the first preset temperature; and to shut down the heating unit when the temperature obtained by the first temperature sensor is greater than or equal to the first preset temperature.

[0100] For example, the first preset temperature is 5°C-15°C, preferably 10°C. The first preset temperature is the minimum temperature standard for the heating system 300 to heat the pressure reducer 130 and the vaporizer 230.

[0101] By adopting the above technical solution, when the vehicle is in an extremely cold environment, the temperature of the coolant will be lower than the first preset temperature due to the ambient temperature. At this time, the controller 410 will control the heating unit to start, thereby heating the natural gas passing through the compressed natural gas solenoid valve 120, thus ensuring the normal use of the compressed natural gas supply system 100 and ensuring that the vehicle can start and warm up smoothly in an extremely cold environment. After the vehicle is warmed up, the temperature of the coolant in the cooling device in the vehicle will rise. When the temperature of the coolant obtained by the first temperature sensor is greater than or equal to the first preset temperature, the heating unit will be controlled to turn off, thus completing the vehicle start-up in an extremely cold environment.

[0102] In some embodiments, the compressed natural gas and liquefied natural gas mixed gas supply system further includes a second temperature sensor, which is communicatively connected to the controller 410 and configured to acquire the temperature of the external environment.

[0103] The controller 410 is configured to start one of the compressed natural gas supply system 100 and the liquefied natural gas supply system 200 to start the vehicle when the temperature obtained by the second temperature sensor is greater than or equal to a second preset temperature.

[0104] When the temperature obtained by the second temperature sensor is lower than the second preset temperature, the compressed natural gas supply system 100 is started to start the vehicle.

[0105] For example, the second preset temperature is -15°C to -25°C, preferably -20°C. The second preset temperature is the temperature standard for the vehicle in extremely cold environments.

[0106] For example, when the temperature obtained by the second temperature sensor is greater than or equal to the second preset temperature, the temperature obtained by the first temperature sensor is greater than or equal to the first preset temperature; when the temperature obtained by the second temperature sensor is less than the second preset temperature, the temperature obtained by the first temperature sensor is less than the first preset temperature.

[0107] By adopting the above technical solution, the second temperature sensor is used to detect the temperature of the external environment, thereby determining the ambient temperature of the vehicle. When the ambient temperature of the vehicle is lower than the second preset temperature, that is, when the vehicle is in an extremely cold environment, the vehicle can only be started using the compressed natural gas supply system 100. When the ambient temperature of the vehicle is greater than or equal to the second preset temperature, that is, when the ambient temperature of the vehicle is not yet in an extremely cold environment, either the compressed natural gas supply system 100 or the liquefied natural gas supply system 200 can be used to start the vehicle. By setting up the second temperature sensor, the driver can easily select the appropriate vehicle starting method according to the external environment of the vehicle.

[0108] In some embodiments, the controller 410 is configured to start the compressed natural gas supply system 100 and the heating unit to warm up the vehicle when the temperature obtained by the second temperature sensor is less than the second preset temperature and the temperature obtained by the first temperature sensor is less than the first preset temperature.

[0109] When the temperature obtained by the first temperature sensor is greater than or equal to the first preset temperature, the compressed natural gas supply system 100 is shut down and the liquefied natural gas supply system 200 is started, so that the vehicle can run normally using liquefied natural gas as fuel.

[0110] By adopting the above technical solution, when the temperature obtained by the second temperature sensor is lower than the second preset temperature, that is, when the vehicle is in an extremely cold environment, the temperature of the coolant in the cooling device will also be lower than the first preset temperature. At this time, the vehicle can only be started using the compressed natural gas supply system 100 as an energy source, and the controller 410 controls the heating unit to start. After the vehicle is started, the temperature of the coolant in the cooling device will rise. When the temperature obtained by the first temperature sensor is greater than or equal to the first preset temperature, that is, when the heating system 300 can heat the pressure reducer 130 and the carburetor 230, the controller 410 can control the compressed natural gas supply system 100 to shut down and the liquefied natural gas supply system 200 to start, so that the vehicle can run normally using liquefied natural gas as fuel, which facilitates the vehicle to run normally using liquefied natural gas as fuel in extremely cold environments.

[0111] In some embodiments, the switch 420 has a limiting element that is communicatively connected to the controller 410, and the limiting element is configured to restrict the switch 420 from the compressed natural gas setting to the liquefied natural gas setting.

[0112] The controller 410 is configured to activate a control limiter when the temperature obtained by the second temperature sensor is lower than a second preset temperature, so as to limit the switch 420 from the compressed natural gas setting to the liquefied natural gas setting.

[0113] When the temperature obtained by the first temperature sensor is greater than or equal to the first preset temperature, the control limiter closes, so that the switch 420 can freely switch between compressed natural gas and liquefied natural gas.

[0114] By adopting the above technical solution and setting a limiting component, the limiting component can restrict the switching switch 420 from compressed natural gas to liquefied natural gas, so that when the vehicle is in an extremely cold environment, it can only be started by the compressed natural gas supply system 100, thus avoiding driver error and affecting the normal operation of the vehicle.

[0115] This application also discloses a vehicle, including a vehicle body and a mixed gas supply system of compressed natural gas and liquefied natural gas, as described in any of the above embodiments, installed on the vehicle body.

[0116] The structure and principle of the mixed gas supply system for compressed natural gas and liquefied natural gas have been clearly explained in the above embodiments, and will not be elaborated here.

[0117] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A compressed natural gas and liquefied natural gas hybrid fueling system, comprising: Includes a compressed natural gas supply system, a liquefied natural gas supply system, a heating system, a control system, and a second temperature sensor; The compressed natural gas supply system includes a compressed natural gas high-pressure inlet, a compressed natural gas solenoid valve, a pressure reducer, and a low-pressure supply inlet connected in sequence. The liquefied natural gas (LNG) supply system includes an LNG inlet, an LNG inlet solenoid valve, a vaporizer, a buffer tank, an LNG supply solenoid valve, and a pressure stabilizing tank connected in sequence. The pressure stabilizing tank is connected to the low-pressure supply inlet. The heating system is connected to the pressure reducer and the vaporizer respectively, and the heating system is configured to heat the pressure reducer and the vaporizer; The control system is communicatively connected to the compressed natural gas solenoid valve, the liquefied natural gas inlet solenoid valve, and the liquefied natural gas supply solenoid valve, respectively. The control system is configured to control the opening of the compressed natural gas solenoid valve and control the closing of the liquefied natural gas inlet solenoid valve and the liquefied natural gas supply solenoid valve, so as to enable the compressed natural gas supply system to operate. The liquefied natural gas (LNG) inlet solenoid valve and the LNG supply solenoid valve are opened, and the compressed natural gas (CNG) solenoid valve is closed, so that the LNG supply system can operate. The control system includes a controller, and the compressed natural gas solenoid valve has a heating unit configured to heat the natural gas passing through the compressed natural gas solenoid valve. The heating system includes a first temperature sensor, and the first temperature sensor and the heating unit are respectively communicatively connected to the controller. The first temperature sensor is configured to acquire the temperature of the coolant. The second temperature sensor is communicatively connected to the controller of the control system, and the second temperature sensor is configured to acquire the temperature of the external environment; The controller is configured to start one of the compressed natural gas supply system and the liquefied natural gas supply system to start the vehicle when the temperature obtained by the second temperature sensor is greater than or equal to a second preset temperature. When the temperature obtained by the second temperature sensor is lower than the second preset temperature, the compressed natural gas supply system is controlled to start to start the vehicle; The controller is configured to start the heating unit of the compressed natural gas supply system and the compressed natural gas solenoid valve to warm up the vehicle when the temperature obtained by the second temperature sensor is lower than the second preset temperature and the temperature obtained by the first temperature sensor of the heating system is lower than the first preset temperature. When the temperature obtained by the first temperature sensor is greater than or equal to the first preset temperature, the compressed natural gas supply system is shut down and the liquefied natural gas supply system is started, so that the vehicle can run normally using liquefied natural gas as fuel.

2. The compressed natural gas and liquefied natural gas hybrid gas supply system according to claim 1, wherein The controller is communicatively connected to the compressed natural gas solenoid valve, the liquefied natural gas inlet solenoid valve, and the liquefied natural gas supply solenoid valve, respectively. The controller is configured to control the opening of the compressed natural gas solenoid valve and to control the closing of the liquefied natural gas inlet solenoid valve and the liquefied natural gas supply solenoid valve. The system controls the opening of the liquefied natural gas inlet solenoid valve and the liquefied natural gas supply solenoid valve, and controls the closing of the compressed natural gas solenoid valve.

3. The compressed natural gas and liquefied natural gas hybrid gas supply system according to claim 2, wherein The control system includes a switching switch, which is communicatively connected to the controller, and the switching switch has a compressed natural gas setting and a liquefied natural gas setting. The controller is configured to, when the switching switch is in the compressed natural gas position, control the compressed natural gas solenoid valve to open and control the liquefied natural gas inlet solenoid valve and the liquefied natural gas supply solenoid valve to close. When the switching switch is in the liquefied natural gas (LNG) position, the LNG inlet solenoid valve and the LNG supply solenoid valve are opened, and the compressed natural gas (CNG) solenoid valve is closed.

4. The compressed natural gas and liquefied natural gas hybrid gas supply system according to claim 3, wherein The heating system includes a coolant inlet, a coolant branch inlet, a coolant branch outlet, and a coolant return outlet; The coolant inlet and the coolant return outlet are respectively connected to the cooling device in the vehicle; The coolant diversion inlet is connected to the coolant inlet, the pressure reducer, and the vaporizer, respectively. The coolant diversion outlet is connected to the coolant return port, the pressure reducer, and the vaporizer, respectively.

5. The compressed natural gas and liquefied natural gas mixed gas supply system according to claim 4, characterized in that, The controller is configured to start the heating unit when the temperature obtained by the first temperature sensor is less than a first preset temperature; and to shut down the heating unit when the temperature obtained by the first temperature sensor is greater than or equal to the first preset temperature.

6. The compressed natural gas and liquefied natural gas hybrid gas supply system according to claim 5, wherein The switch has a limiting element that is communicatively connected to the controller. The limiting element is configured to restrict the switch from compressed natural gas to liquefied natural gas. The controller is configured to activate a limiting element when the temperature obtained by the second temperature sensor is lower than a second preset temperature, so as to restrict the switching switch from compressed natural gas to liquefied natural gas. When the temperature obtained by the first temperature sensor is greater than or equal to the first preset temperature, the limiting component is controlled to close, so that the switching switch can freely switch between compressed natural gas and liquefied natural gas modes.

7. A vehicle characterized by comprising: The system includes a vehicle body and a mixed gas supply system for compressed natural gas and liquefied natural gas as described in any one of claims 1-6, which is installed on the vehicle body.

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