Engine and motor vehicle

Abstract

The invention relates to the technical field of motor vehicles, and provides an engine and a motor vehicle. The engine comprises an engine body, a natural gas supply system and a methanol supply system, the engine body is provided with a gas inlet system, the gas inlet system is connected with an air supply system, and the air supply system is used for inputting air into the engine body; the natural gas supply system communicates with the gas inlet system at the first position of the gas inlet system and is used for inputting natural gas into the gas inlet system. The methanol supply system is communicated with the gas inlet system at a second position of the gas inlet system, and the methanol supply system is used for inputting methanol into the gas inlet system; wherein the flow direction of air flow in the air inlet system flows from the first position to the second position. The defects that in the prior art, a motor vehicle adopting methanol fuel cannot be started at low temperature and is poor in cruising ability are overcome, and the heat efficiency of an engine is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor vehicles, and in particular to an engine and a motor vehicle. Background Art

[0002] Traditional fossil fuels are highly polluting and non-renewable, while methanol is a renewable fuel that can be artificially prepared. At the same time, the exhaust gas produced by methanol combustion is cleaner and cheaper than diesel, so methanol is regarded as a substitute for diesel and gasoline. However, methanol fuel has problems such as being unable to start at low temperatures and having poor endurance, which makes it difficult to apply. In order to solve the above problems, it is necessary to design an engine and a motor vehicle. Summary of the invention

[0003] The present invention provides an engine and a motor vehicle, which are used to solve the defects in the prior art that motor vehicles using methanol fuel cannot be started at low temperatures and have poor endurance, and realize an engine and a motor vehicle that can solve the above problems.

[0004] The present invention provides an engine comprising an engine body, a natural gas supply system and a methanol supply system, wherein the engine body has an intake system, the intake system is connected to an air supply system, and the air supply system is used to input air into the engine body; the natural gas supply system is connected to the intake system at a first position of the intake system, and the natural gas supply system is used to input natural gas into the intake system; the methanol supply system is connected to the intake system at a second position of the intake system, and the methanol supply system is used to input methanol into the intake system; wherein the flow direction of the airflow in the intake system is from the first position to the second position.

[0005] According to an engine provided by the present invention, the engine body also includes a body, and the interior of the body has a combustion chamber; the intake system is arranged on the body, and the intake system is used to input fuel gas into the interior of the combustion chamber; the body is also provided with an exhaust system, and the exhaust system is used to discharge the exhaust gas inside the combustion chamber.

[0006] According to an engine provided by the present invention, the intake system includes an intake passage and an intake valve; one end of the intake passage is connected to the air supply system, and the other end is connected to the combustion chamber; the intake valve is arranged at the intersection of the intake passage and the combustion chamber, and the intake valve is used to switch between a first state and a second state. In the first state, the intake passage is connected to the combustion chamber, and in the second state, the intake valve is blocked between the intake passage and the combustion chamber.

[0007] According to an engine provided by the present invention, the exhaust system includes an exhaust channel and an exhaust valve; one end of the exhaust channel is connected to the exhaust pipe, and the other end is connected to the combustion chamber; the exhaust valve is arranged at the intersection of the exhaust channel and the combustion chamber, and the exhaust valve is used to switch between a third state and a fourth state; in the third state, the exhaust channel is connected to the combustion chamber, and in the fourth state, the exhaust valve is blocked between the exhaust channel and the combustion chamber.

[0008] According to an engine provided by the present invention, the engine body is provided with a methanol nozzle and a natural gas nozzle, one end of the methanol nozzle and the natural gas nozzle are both connected to the intake passage, the other end of the methanol nozzle is connected to the methanol supply system, and the other end of the natural gas nozzle is connected to the natural gas supply system.

[0009] According to an engine provided by the present invention, the engine body is further provided with an ignition system, and the ignition system is used to ignite the fuel gas inside the combustion chamber.

[0010] According to an engine provided by the present invention, the engine body includes a cylinder block and a cylinder head; the combustion chamber is arranged inside the cylinder block, and a piston is arranged inside the combustion chamber; the intake system and the exhaust system are symmetrically arranged on the cylinder head.

[0011] According to an engine provided by the present invention, the methanol supply system includes a gas cylinder, a gas filter, a shut-off valve, a pressure-stabilizing valve, a heat exchanger, a thermostat and a fuel metering valve; wherein the gas cylinder, the gas filter, the shut-off valve, the pressure-stabilizing valve, the heat exchanger, the thermostat and the fuel metering valve are connected end to end in sequence, and the fuel metering valve is connected to the methanol nozzle.

[0012] According to an engine provided by the present invention, the natural gas supply system includes a methanol tank, a methanol filter, a methanol pump, a pressure regulating valve and a methanol rail; wherein the methanol tank, the methanol filter, the methanol pump, the pressure regulating valve and the methanol rail are connected end to end in sequence, and the methanol rail is connected to the natural gas nozzle.

[0013] The present invention also provides a motor vehicle, comprising the engine described in any one of the above embodiments.

[0014] The present invention provides an engine which can have three modes: pure methanol fuel mode, pure natural gas mode, and methanol-natural gas dual-fuel mode by independently controlling the natural gas supply system and the methanol supply system. When starting in a low-temperature environment, the system can give priority to using natural gas as fuel, because natural gas can be well mixed with air even under low-temperature conditions. Preheating with natural gas helps to heat the engine to a suitable operating temperature. Once the engine reaches a preset temperature, it can switch to pure methanol fuel mode or continue to maintain dual-fuel mode as needed. The present invention can improve the thermal efficiency of the engine, reduce fuel consumption, and alleviate the problem of difficulty in starting methanol at low temperatures (the engine cannot be started if the temperature in pure methanol mode is lower than 25°C, but the dual-fuel mode can be successfully started at minus 15°C)

[0015] Furthermore, since the motor vehicle provided by the present invention includes the above-mentioned engine, it also has the advantages possessed by the above-mentioned engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a structural schematic diagram of the engine provided by the present invention.

[0018] Figure 2 It is a fuel supply flow chart of the engine provided by the present invention.

[0019] Figure numerals: 100: engine body; 200: natural gas supply system; 300: methanol supply system; 400: air supply system; 110: engine body; 120: ignition system; 130: intake system; 140: exhaust system; 150: methanol nozzle; 160: natural gas nozzle; 111: cylinder block; 112: piston; 113: combustion chamber; 114: cylinder head; 131: intake passage; 132: intake valve; 141: exhaust passage; 142: exhaust valve. DETAILED DESCRIPTION

[0020] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] 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.

[0022] 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.

[0023] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the 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, the first feature being "above", "above" and "above" the 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. The first feature being "below", "below" and "below" the 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.

[0024] 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.

[0025] Combine the following Figure 1 and Figure 2 The engine of the present invention is described.

[0026] refer to Figure 1 and Figure 2 The present invention provides an engine including an engine body 100, a natural gas supply system 200 and a methanol supply system 300. The engine body 100 has an intake system 130, and the intake system 130 is connected to an air supply system 400, and the air supply system 400 is used to input air into the engine body 100; the natural gas supply system 200 is connected to the intake system 130 at a first position of the intake system 130, and the natural gas supply system 200 is used to input natural gas into the intake system 130; the methanol supply system 300 is connected to the intake system 130 at a second position of the intake system 130, and the methanol supply system 300 is used to input methanol into the intake system 130; wherein, the flow direction of the air flow in the intake system 130 is from the first position to the second position. It should be noted that the first position is close to one end of the intake port of the intake system 130, and the second position is close to one end of the outlet of the intake system 130, that is, close to one end of the combustion chamber. In this arrangement, methanol will first form a methanol mixture with air in the intake system 130, then natural gas will form a natural gas mixture with air, and finally the natural gas mixture will push the methanol mixture into the engine cylinder. Since the natural gas mixture pushes the methanol mixture into the engine cylinder, the methanol mixture is distributed in the lower layer, while the natural gas mixture is distributed in the upper layer. The spark plug ignites the natural gas mixture in the upper layer, and the natural gas then ignites the methanol fuel in the lower layer, thereby achieving stratified combustion of the fuel.

[0027] Methanol fuel is difficult to atomize at 25 degrees Celsius and is difficult to fully mix with air to form a mixed gas. However, impure natural gas can still be well mixed with air at minus 40 degrees Celsius. The present invention can have three modes: pure methanol fuel mode, pure natural gas mode, and methanol-natural gas dual fuel mode by independently controlling the natural gas supply system 200 and the methanol supply system 300. When starting in a low temperature environment, the system can give priority to using natural gas as fuel because natural gas can be well mixed with air even under low temperature conditions. Preheating with natural gas helps to heat the engine to a suitable operating temperature. Once the engine reaches the preset temperature, it can be switched to pure methanol fuel mode or continue to maintain dual fuel mode as needed. Of course, in order to be able to switch freely between the three modes, the present invention is also provided with an engine control system (ECU), and the engine control system can refer to the prior art, so it will not be repeated.

[0028] Secondly, methanol does not burn completely during cold start, resulting in low fuel utilization and more pollutants. The present invention preheats the engine with natural gas, which can effectively improve the methanol fuel utilization and effectively reduce the emission of pollutants caused by insufficient methanol. Since methanol fuel contains less nitrogen, sulfur, phosphorus and other elements than fossil fuels, methanol emits less nitrogen, sulfur and phosphorus pollutants after full combustion.

[0029] Furthermore, in the methanol-natural gas dual fuel mode, methanol and natural gas are respectively transported to the intake system 130 through independent pipelines to mix with air to form a methanol-air mixture and a natural gas-air mixture. The methanol-natural gas mixture first enters the engine body 100, and the natural gas-air mixture enters the engine body 100 later. Since natural gas can be better mixed with air, the natural gas-air mixture can blow the methanol droplets that have not completely entered the engine body 100 from the intake system 130 into the engine body 100. After the natural gas-air mixture enters the engine body 100, the spark plug discharges to ignite the natural gas-air mixture, and the natural gas-air mixture ignites the methanol-air mixture to complete the release of energy.

[0030] Reference Figure 1 In some embodiments of the present invention, the engine body 100 further includes a body 110, the body 110 has a combustion chamber 113 inside; an intake system 130 is provided on the body 110, and the intake system 130 is used to input fuel gas into the combustion chamber 113; the body 110 is also provided with an exhaust system 140, and the exhaust system 140 is used to discharge the exhaust gas inside the combustion chamber 113. The body 110 is also provided with an ignition system 120, and the ignition system 120 is used to ignite the fuel gas inside the combustion chamber 113.

[0031] The body 110 is made of cast iron or aluminum alloy. Cast iron has good heat resistance and strength, and is suitable for diesel engines with high compression ratios; while aluminum alloy is lighter and has good heat dissipation, and is suitable for gasoline engines and certain low compression ratio application scenarios. In order to improve efficiency and reduce wear, in some possible embodiments, the internal surface of the body 110 is usually specially treated, such as plating or using wear-resistant materials. In this embodiment, the body 110 is the basic structure of the engine and supports all components of the entire engine. The combustion chamber 113 arranged inside the body 110 is used for burning a mixture of fuel and air to generate power.

[0032] In this embodiment, air enters the intake system 130 through an air filter. At the first position of the intake system 130 (near the air inlet), natural gas is injected and mixed with air. The selection of this position helps to utilize the easy ignition characteristics of natural gas to assist cold start. As the air flow continues to flow toward the combustion chamber 113, methanol is injected and further mixed with air and natural gas at the second position of the intake system 130 (closer to the combustion chamber 113). This ensures that methanol is fully atomized and evenly distributed in the combustion chamber 113. The entire fuel supply process is precisely controlled by the ECU. The ECU adjusts the ratio of natural gas and methanol based on the data provided by the sensor (such as temperature, pressure, speed, etc.) to achieve the best combustion efficiency and emission performance. When the combustible mixed gas enters the combustion chamber 113, the ignition system 120 ignites the gas to initiate combustion. Finally, the burned exhaust gas is discharged through the exhaust system 140.

[0033] Reference Figure 1 In some embodiments of the present invention, the intake system 130 includes an intake passage 131 and an intake valve 132; one end of the intake passage 131 is connected to the air supply system 400, and the other end is connected to the combustion chamber 113; the intake valve 132 is arranged at the intersection of the intake passage 131 and the combustion chamber 113, and the intake valve 132 is used to switch between a first state and a second state. In the first state, the intake passage 131 is connected to the combustion chamber 113, and in the second state, the intake valve 132 is blocked between the intake passage 131 and the combustion chamber 113. The exhaust system 140 includes an exhaust channel 141 and an exhaust valve 142; one end of the exhaust channel 141 is connected to the exhaust pipe, and the other end is connected to the combustion chamber 113; the exhaust valve 142 is arranged at the intersection of the exhaust channel 141 and the combustion chamber 113, and the exhaust valve 142 is used to switch between a third state and a fourth state; in the third state, the exhaust channel 141 is connected to the combustion chamber 113, and in the fourth state, the exhaust valve 142 is blocked between the exhaust channel 141 and the combustion chamber 113.

[0034] The following four phases of cycles are performed during the working process of the embodiment: ① Intake stage: the intake valve 132 is in the first state (open), allowing the mixed gas of air, natural gas and methanol to enter the combustion chamber 113. After the intake is completed, the intake valve 132 switches to the second state (closed), sealing the combustion chamber 113.

[0035] ② Compression stage: The intake valve 132 and the exhaust valve 142 are both in a closed state. The piston moves upward to compress the mixed gas in the combustion chamber 113.

[0036] ③ Combustion (power) stage: When the piston approaches the top dead center, the spark plug ignites the mixed gas (for gasoline / methanol engines) or the mixed gas spontaneously ignites (for diesel engines). The high-temperature and high-pressure gas generated by the combustion pushes the piston downward to generate power output.

[0037] ④ Exhaust stage: The exhaust valve 142 is in the third state (open), allowing the exhaust gas after combustion to be discharged from the combustion chamber 113. After the exhaust gas is discharged, the exhaust valve 142 switches to the fourth state (closed), sealing the combustion chamber 113 and preparing for the intake process of the next cycle.

[0038] Through this design, the timely opening and closing of the intake valve 132 and the exhaust valve 142 ensures the smooth progress of each working cycle. The coordinated work of the intake system 130 and the exhaust system 140 enables the engine to efficiently inhale the fuel mixture and exhaust the exhaust gas, thereby achieving continuous power output.

[0039] Reference Figure 1 In some embodiments of the present invention, the body 110 is provided with a methanol nozzle 150 and a natural gas nozzle 160, one end of the methanol nozzle 150 and the natural gas nozzle 160 are both connected to the intake passage 131, the other end of the methanol nozzle 150 is connected to the methanol supply system 300, and the other end of the natural gas nozzle 160 is connected to the natural gas supply system 200.

[0040] In the above structure, the main function of the methanol nozzle 150 is to spray methanol into the intake passage 131 in an atomized form evenly to ensure that the methanol is fully mixed with the air. Through the control of the ECU, the methanol nozzle 150 can adjust the injection amount to meet the needs of different working conditions. The methanol nozzle 150 can be made of corrosion-resistant materials (such as stainless steel or special alloys) to extend the service life. A wear-resistant coating can also be applied inside the methanol nozzle 150 to reduce wear and improve reliability.

[0041] The main function of the natural gas nozzle 160 is to spray the natural gas into the intake passage 131 in a uniform manner to ensure that the natural gas and the air are fully mixed. Through the control of the ECU, the natural gas nozzle 160 can adjust the injection amount to meet the needs under different working conditions.

[0042] In some possible embodiments, multiple methanol nozzles 150 may be provided at different positions of the intake passage 131 to achieve a more uniform distribution of methanol. Each methanol nozzle 150 may be independently controlled, and the injection amount of each methanol nozzle 150 may be adjusted according to actual needs to improve combustion efficiency. The methanol nozzle 150 may use high-pressure direct injection technology to directly inject methanol into the combustion chamber 113, further improving combustion efficiency and power output. A heating device may also be provided on the methanol nozzle 150, and when starting at low temperature, the methanol nozzle 150 may be preheated by the heating device to prevent methanol from solidifying or clogging. For the natural gas nozzle 160, reference may be made to the above-mentioned setting of the methanol nozzle 150, which will not be repeated here.

[0043] Reference Figure 1 In some embodiments of the present invention, the engine body 110 includes a cylinder body 111 and a cylinder head 114; a combustion chamber 113 is disposed inside the cylinder body 111, and a piston 112 is disposed inside the combustion chamber 113; an intake system 130 and an exhaust system 140 are symmetrically disposed in the cylinder head 114. An ignition system 120 is disposed in the middle of the cylinder head 114. The cylinder body 111 is connected to the top of the cylinder body 111 by bolts, thereby covering the combustion chamber 113.

[0044] Reference Figure 2 In some embodiments of the present invention, the methanol supply system 300 includes a gas cylinder, a gas filter, a shut-off valve, a pressure-stabilizing valve, a heat exchanger, a thermostat and a fuel metering valve; wherein the gas cylinder, the gas filter, the shut-off valve, the pressure-stabilizing valve, the heat exchanger, the thermostat and the fuel metering valve are connected end to end in sequence, and the fuel metering valve is connected to the methanol nozzle 150.

[0045] In this embodiment, methanol is first stored in a gas cylinder, which is the starting point of the entire system. When the engine is started, methanol flows out of the gas cylinder and enters the gas filter. The function of the gas filter is to filter out impurities and particulate matter in the methanol to ensure that the methanol entering the subsequent system is pure and free of impurities, thereby protecting other components from contamination. The filtered methanol flows through the shut-off valve. The shut-off valve remains open during normal operation to allow methanol to pass through; in an emergency or when no fuel supply is required, the shut-off valve will close quickly to prevent methanol leakage and ensure the safety of the system. Next, the methanol passes through the pressure regulating valve. The main function of the pressure regulating valve is to maintain the pressure of the methanol within a stable range to ensure the consistency and reliability of the injection process. This can avoid the problem of uneven injection volume caused by pressure fluctuations and improve combustion efficiency.

[0046] To adapt to different ambient temperatures and operating conditions, the methanol then enters the heat exchanger. The heat exchanger adjusts the temperature of the methanol as needed. At low temperatures, the heat exchanger can preheat the methanol to prevent it from freezing or flowing smoothly, ensuring that the methanol can pass through the pipeline smoothly. In addition, the heat exchanger can cool the methanol at high temperatures to prevent overheating. The methanol regulated by the heat exchanger continues to flow to the thermostat. The thermostat further fine-tunes the temperature of the methanol to ensure that it is within the optimal operating temperature range.

[0047] Finally, the methanol reaches the fuel metering valve. The fuel metering valve precisely controls the amount of methanol entering the nozzle according to the instructions of the electronic control unit (ECU). The ECU calculates the optimal methanol injection amount based on the data provided by the sensor (such as engine speed, load, temperature, etc.) and sends a corresponding signal to the fuel metering valve. The fuel metering valve responds to these signals and adjusts the valve opening to control the methanol flow. The methanol regulated by the fuel metering valve finally enters the methanol nozzle 150. The methanol nozzle 150 atomizes the methanol and sprays it into the intake passage 131, where it mixes with air to form a combustible mixed gas. The position and number of the nozzles can be optimized according to the design requirements to ensure a uniform distribution of the mixed gas, thereby achieving an efficient combustion process.

[0048] Through this series of settings, the methanol supply system 300 ensures that the entire process from storage to injection of methanol is stable, clean and accurate, providing a reliable power source for the engine. This design not only improves the combustion efficiency of the engine, but also reduces emissions, enhancing the overall economy and reliability.

[0049] Reference Figure 2 In some embodiments of the present invention, the natural gas supply system 200 includes a methanol tank, a methanol filter, a methanol pump, a pressure regulating valve and a methanol rail; wherein the methanol tank, the methanol filter, the methanol pump, the pressure regulating valve and the methanol rail are connected end to end in sequence, and the methanol rail is connected to the natural gas nozzle 160.

[0050] In this embodiment, natural gas is first stored in a methanol tank, which is the starting point of the entire system. When the engine is started, natural gas flows out of the methanol tank and enters the methanol filter. The function of the methanol filter is to filter out impurities and particulate matter in the natural gas, ensuring that the natural gas entering the subsequent system is pure and free of impurities, thereby protecting other components from contamination. The filtered natural gas flows through the methanol pump. The main function of the methanol pump is to extract the natural gas from the methanol tank and provide sufficient pressure to ensure that the natural gas can pass smoothly through the entire system. The working state of the methanol pump is adjusted by the electronic control unit (ECU) according to the needs of the engine to ensure that the gas supply matches the actual needs of the engine.

[0051] Next, the natural gas passes through the pressure regulating valve. The main function of the pressure regulating valve is to maintain the pressure of the natural gas within a stable range to ensure the consistency and reliability of the injection process. This can avoid the problem of uneven injection volume caused by pressure fluctuations and improve combustion efficiency. The pressure regulating valve will automatically adjust according to the working status of the engine and the instructions of the ECU to ensure the optimal supply pressure. The natural gas regulated by the pressure regulating valve finally enters the methanol rail. The methanol rail is a high-pressure pipeline responsible for evenly distributing natural gas to each natural gas nozzle 160. The design of the methanol rail ensures that the pressure of natural gas is balanced between each nozzle, so that each cylinder can get a consistent supply of natural gas. The methanol rail also has a certain volume, which can buffer the changes in the supply pressure in a short time, further improving the stability of the system.

[0052] Finally, the natural gas reaches the natural gas nozzle 160 through the methanol rail. The natural gas nozzle 160 atomizes the natural gas and sprays it into the intake passage 131 to mix with the air to form a combustible mixed gas. The position and number of the nozzles can be optimized according to the design requirements to ensure uniform distribution of the mixed gas, thereby achieving an efficient combustion process. Each natural gas nozzle 160 is precisely controlled by the ECU to adjust the injection amount and injection timing according to the real-time working conditions of the engine to ensure optimal combustion efficiency and power output.

[0053] Through this series of settings, the natural gas supply system 200 ensures that the entire process from storage to injection of natural gas is stable, clean and accurate, providing a reliable power source for the engine. This design not only improves the combustion efficiency of the engine, but also reduces emissions, enhancing the overall economy and reliability.

[0054] The air supply system 400 includes a filter element, a supercharger and an intercooler, which are connected end to end in sequence and finally communicated with the intake passage 131 through the intercooler. The air first enters the intake passage 131, then mixes with natural gas, and finally mixes with methanol.

[0055] The present invention also provides a motor vehicle, comprising an engine according to any one of the above embodiments. The motor vehicle may be a passenger car, a commercial vehicle or the like. In fact, any motor vehicle capable of using the engine may be used.

[0056] 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.

Claims

1. An engine, characterized in that: include: An engine body (100) has an air intake system (130), wherein the air intake system (130) is connected to an air supply system (400), and the air supply system (400) is used to input air into the interior of the engine body (100); a natural gas supply system (200), connected to the air intake system (130) at a first position of the air intake system (130), the natural gas supply system (200) being used to input natural gas into the air intake system (130); a methanol supply system (300) connected to the air intake system (130) at a second position of the air intake system (130), the methanol supply system (300) being used to input methanol into the air intake system (130); Wherein, the flow direction of the air flow inside the air intake system (130) is from the first position to the second position.

2. The engine according to claim 1, characterized in that The engine body (100) further comprises a body (110), wherein the body (110) has a combustion chamber (113) inside. The air intake system (130) is disposed on the engine body (110), and the air intake system (130) is used to input fuel gas into the combustion chamber (113); The engine body (110) is further provided with an exhaust system (140), and the exhaust system (140) is used to exhaust exhaust gas inside the combustion chamber (113).

3. The engine according to claim 2, characterized in that The air intake system (130) comprises an air intake passage (131) and an air intake valve (132); One end of the air intake passage (131) is in communication with the air supply system (400), and the other end is in communication with the combustion chamber (113); The intake valve (132) is arranged at the intersection of the intake passage (131) and the combustion chamber (113), and the intake valve (132) is used to switch between a first state and a second state. In the first state, the intake passage (131) is connected to the combustion chamber (113), and in the second state, the intake valve (132) is blocked between the intake passage (131) and the combustion chamber (113).

4. The engine according to claim 2, characterized in that The exhaust system (140) comprises an exhaust passage (141) and an exhaust valve (142); One end of the exhaust channel (141) is in communication with the exhaust pipe, and the other end is in communication with the combustion chamber (113); The exhaust valve (142) is arranged at the intersection of the exhaust passage (141) and the combustion chamber (113), and the exhaust valve (142) is used to switch between a third state and a fourth state; in the third state, the exhaust passage (141) is connected to the combustion chamber (113), and in the fourth state, the exhaust valve (142) is blocked between the exhaust passage (141) and the combustion chamber (113).

5. The engine according to claim 3, characterized in that The engine body (110) is provided with a methanol nozzle (150) and a natural gas nozzle (160); one end of each of the methanol nozzle (150) and the natural gas nozzle (160) is in communication with the air intake passage (131); the other end of the methanol nozzle (150) is in communication with the methanol supply system (300); and the other end of the natural gas nozzle (160) is in communication with the natural gas supply system (200).

6. The engine according to claim 2, characterized in that The machine body (110) is also provided with an ignition system (120), and the ignition system (120) is used to ignite the fuel gas inside the combustion chamber (113).

7. The engine according to claim 6, characterized in that The engine body (110) comprises a cylinder body (111) and a cylinder head (114); The combustion chamber (113) is arranged inside the cylinder body (111), and a piston (112) is arranged inside the combustion chamber (113); The intake system (130) and the exhaust system (140) are symmetrically arranged on the cylinder head (114).

8. The engine according to claim 5, characterized in that The methanol supply system (300) comprises a gas cylinder, a fuel gas filter, a cut-off valve, a pressure-stabilizing valve, a heat exchanger, a thermostat and a fuel metering valve; wherein: The gas cylinder, the fuel gas filter, the cut-off valve, the pressure-stabilizing valve, the heat exchanger, the thermostat and the fuel metering valve are connected end to end in sequence, and the fuel metering valve is connected to the methanol nozzle (150).

9. The engine according to claim 5 or 8, characterized in that: The natural gas supply system (200) comprises a methanol tank, a methanol filter, a methanol pump, a pressure regulating valve and a methanol rail; wherein: The methanol tank, the methanol filter, the methanol pump, the pressure regulating valve and the methanol rail are connected end to end in sequence, and the methanol rail is connected to the natural gas nozzle (160).

10. A motor vehicle, characterized in that: Comprising an engine as described in any one of claims 1-9.

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