Multi-fuel internal combustion engine and vehicle

Abstract

The utility model provides a multi-fuel internal combustion engine and a vehicle, and relates to the technical field of internal combustion engines. The gas storage tank is respectively connected with the hydrogen supply assembly, the natural gas supply assembly and the liquefied petroleum gas supply assembly; the methanol and gasoline and diesel oil mixed reforming furnace supplies methanol and / or gasoline and diesel oil through a methanol and gasoline and diesel oil supply assembly, and a mixed reforming furnace jacket is arranged on the periphery of the methanol and gasoline and diesel oil mixed reforming furnace; an exhaust pipe of the multi-fuel internal combustion engine body is communicated with the mixed reforming furnace jacket through a tail gas heating and cooling temperature control assembly, and the tail gas heating and cooling temperature control assembly is used for adjusting the temperature of tail gas entering the mixed reforming furnace jacket. According to the utility model, the cold start performance, the fuel economy and the safety performance are excellent.

Description

TECHNICAL FIELD

[0001] The utility model relates to internal combustion engine technical field, specifically, a kind of multi-fuel internal combustion engine and vehicle. BACKGROUND

[0002] With the requirement of energy conservation and emission reduction under environmental protection concept, green methanol, green hydrogen and methane natural gas as fuel in internal combustion engine have become more and more common.

[0003] But the current internal combustion engine, its fuel is mostly single fuel system, cannot take into account the use of multiple fuels, also some internal combustion engine can use multi-fuel, but there are still deficiencies in cold start performance and safety performance. UTILITY MODEL CONTENT

[0004] The utility model solves the problem that the existing internal combustion engine cannot take into account the use of multiple fuels, and some internal combustion engines can use multi-fuel, but there are still deficiencies in cold start performance and safety performance.

[0005] To solve the above problems, in the first aspect, the utility model provides a kind of multi-fuel internal combustion engine, comprising:

[0006] Multi-fuel internal combustion engine body;

[0007] Gas storage tank, the gas storage tank is connected with hydrogen supply assembly, natural gas supply assembly and liquefied petroleum gas supply assembly respectively;

[0008] Methanol and gasoline-diesel oil mixed reformer, the methanol and gasoline-diesel oil mixed reformer is supplied with methanol and / or gasoline-diesel oil by methanol and gasoline-diesel oil supply assembly, the periphery of the methanol and gasoline-diesel oil mixed reformer is equipped with mixed reformer jacket, the exhaust pipe of the multi-fuel internal combustion engine body is communicated with the mixed reformer jacket by tail gas heating and cooling temperature control assembly, the tail gas heating and cooling temperature control assembly is used to adjust the temperature of tail gas into the mixed reformer jacket, mixed gas supply pipe and separation backflow assembly are respectively arranged between the methanol and gasoline-diesel oil mixed reformer and the gas storage tank, the mixed gas supply pipe is used to transport combustible mixed gas generated in the methanol and gasoline-diesel oil mixed reformer to the gas storage tank, the separation backflow assembly is used to separate and backflow methanol and / or gasoline-diesel oil not completely converted from the combustible mixed gas;

[0009] Wherein, the gas storage tank and the multi-fuel internal combustion engine body are connected by pressure buffer air intake assembly, the pressure buffer air intake assembly includes main air intake pipe assembly and pressure relief sub-air intake pipe assembly, when the pressure corresponding to the main air intake pipe assembly exceeds the set pressure, the pressure relief sub-air intake pipe assembly opens.

[0010] Optionally, the main air inlet pipe assembly comprises a main air inlet pipe for connecting the gas tank and the multi-fuel internal combustion engine body, and a flow regulating valve installed on the main air inlet pipe; the pressure relief sub-air inlet pipe assembly comprises a pressure relief pipe, a buffer tank and a sub-air inlet pipe, the gas tank is connected with the buffer tank through the pressure relief pipe, a pressure relief valve is installed on the pressure relief pipe, the buffer tank is connected with the multi-fuel internal combustion engine body through the sub-air inlet pipe, and a one-way valve II is installed on the sub-air inlet pipe for input of the combustible mixed gas.

[0011] Optionally, one end of the sub-air inlet pipe away from the buffer tank is connected with the main air inlet pipe, and the connection position of the sub-air inlet pipe with the main air inlet pipe is located between the flow regulating valve and the gas tank.

[0012] Optionally, the exhaust pipe of the multi-fuel internal combustion engine body comprises an exhaust pipe I, an exhaust pipe II and an exhaust pipe III, the exhaust pipe I is used for connecting the exhaust outlet of the multi-fuel internal combustion engine body and the air inlet of the exhaust gas heating and cooling temperature control assembly, the exhaust pipe II is used for connecting the air outlet of the exhaust gas heating and cooling temperature control assembly and the mixed reformer jacket, and one end of the exhaust pipe III is connected with the mixed reformer jacket and the other end is an exhaust end.

[0013] Optionally, the mixed reformer for methanol and gasoline / diesel oil comprises a mixed reformer body and a mixed reformer liquid storage chamber arranged in the mixed reformer body, a plurality of porous plates are arranged in the mixed reformer liquid storage chamber, and the plurality of porous plates are used for containing catalysts, wherein the catalysts comprise gasoline / diesel oil reforming catalysts and methanol reforming catalysts.

[0014] Optionally, the plurality of porous plates comprise a plurality of porous plates I and a plurality of porous plates II, the plurality of porous plates I are used for containing the gasoline / diesel oil reforming catalysts, and the plurality of porous plates II are used for containing the methanol reforming catalysts.

[0015] Optionally, the plurality of porous plates I and the plurality of porous plates II are arranged side by side and are arranged in parallel with or perpendicularly to the flow direction of the combustible mixed gas.

[0016] Optionally, the mixed reformer liquid storage chamber further comprises a temperature measuring element and a pressure measuring element, the temperature measuring element is used for measuring the temperature of the catalysts, and the pressure measuring element is used for measuring the internal pressure of the mixed reformer liquid storage chamber.

[0017] Optionally, the separation and reflux assembly comprises a one-way valve VII, a gas-liquid separator and a liquid return pipe, the liquid return pipe is used for connecting the gas tank and the mixed reformer liquid storage chamber, the gas-liquid separator and the one-way valve VII are sequentially arranged on the liquid return pipe along the flow direction of the methanol and / or gasoline / diesel oil, and the one-way valve VII is used for one-way flow of the methanol and / or gasoline / diesel oil.

[0018] Optionally, the mixed gas supply pipe comprises a methanol and gasoline-diesel reforming gas connecting pipe for connecting the mixed reformer liquid storage chamber and the gas storage tank, a mixed gas electric valve and a one-way valve one, the mixed gas electric valve and the one-way valve one are sequentially arranged along the flow direction of the combustible mixed gas, and the one-way valve one is used for one-way flow of the combustible mixed gas.

[0019] The multiple-fuel internal combustion engine has the following beneficial effects: the methanol and gasoline-diesel mixed reformer is externally provided with a mixed reformer jacket, an exhaust pipe of the multiple-fuel internal combustion engine body is communicated with the mixed reformer jacket through a tail gas heating and cooling temperature control assembly, the tail gas heating and cooling temperature control assembly is used for adjusting the temperature of the tail gas entering the mixed reformer jacket, thus, the exhaust gas can enter the mixed reformer jacket at a suitable temperature and heat the methanol and gasoline-diesel mixed reformer, the methanol and gasoline-diesel mixed reformer is equivalent to a reaction kettle, and combustible mixed gas is generated under the conditions of heating and the like, which is beneficial to heating the methanol and / or gasoline to meet the temperature requirement of the reforming cracking reaction when the multiple-fuel internal combustion engine body is cold started; the gas storage tank and the multiple-fuel internal combustion engine body are connected through a pressure buffer air inlet assembly, the pressure buffer air inlet assembly comprises a main air inlet pipe assembly and a pressure relief sub-air inlet pipe assembly, the pressure relief sub-air inlet pipe assembly is opened when the corresponding pressure of the main air inlet pipe assembly exceeds the set pressure, thus, one or more of the methanol, the gasoline, the hydrogen, the natural gas and the liquefied petroleum gas can be used as the fuel of the multiple-fuel internal combustion engine body as required, the limitation of single fuel is avoided, the multiple-fuel internal combustion engine body can be flexibly supplied with fuel, the problem that the fuel cannot be filled according to the actual requirement due to excessive pressure is avoided, and the safety of fuel filling is improved; in addition, the methanol and gasoline-diesel mixed reformer and the gas storage tank are respectively provided with a mixed gas supply pipe and a separation backflow assembly, the mixed gas supply pipe is used for conveying the combustible mixed gas generated by the mixed reforming in the methanol and gasoline-diesel mixed reformer to the gas storage tank, and the separation backflow assembly is used for separating and backflowing the methanol and / or gasoline which is not completely converted from the combustible mixed gas, the conversion rate of the methanol and / or gasoline and the content of the combustible mixed gas are improved, and the fuel use economy is improved.

[0020] In another aspect, the utility model also provides a kind of vehicle, comprising the multiple-fuel internal combustion engine of any one of the above, its beneficial effects are identical with the beneficial effects of multiple-fuel internal combustion engine, and it is not described here. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The structure of the multiple-fuel internal combustion engine is shown in the utility model embodiment.

[0022] Figure 2 Fig. 1 shows the internal schematic diagram of the methanol and gasoline-diesel oil mixed reformer according to the embodiment of the present application Figure 1

[0023] Figure 3 Fig. 1 shows the internal schematic diagram of the methanol and gasoline-diesel oil mixed reformer according to the embodiment of the present application Figure 2

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 1, multi-fuel internal combustion engine body; 2, exhaust pipe one; 3, tail gas heating and cooling temperature control assembly; 4, exhaust pipe two; 5, mixed reformer jacket; 6, mixed reformer liquid storage chamber; 7, porous plate one; 8, gasoline-diesel oil reforming catalyst; 9, porous plate two; 10, methanol reforming catalyst; 11, methanol and gasoline-diesel oil mixed reformer; 12, exhaust pipe three; 13, mixed gas electric valve; 14, one-way valve one; 15, gas storage tank; 16, main air inlet pipe; 17, flow regulating valve; 18, pressure relief valve; 19, buffer tank; 20, one-way valve two; 21, methanol and gasoline-diesel oil tank; 22, tank electric valve; 23, methanol and gasoline-diesel oil automatic pressure sensing pump; 24, one-way valve three; 25, hydrogen cylinder; 26, hydrogen electric valve; 27, hydrogen automatic pressure sensing pump; 28, one-way valve four; 29, natural gas cylinder; 30, natural gas electric valve; 31, natural gas automatic pressure sensing pump; 32, one-way valve five; 33, liquefied petroleum gas cylinder; 34, liquefied petroleum gas electric valve; 35, liquefied petroleum gas automatic pressure sensing pump; 36, one-way valve six; 37, one-way valve seven; 38, gas-liquid separator; 39, liquid return pipe; 40, methanol and gasoline-diesel oil reforming gas connecting pipe; 41, hydrogen gas supply pipe; 42, natural gas supply pipe; 43, liquefied petroleum gas supply pipe; 44, methanol and gasoline-diesel oil oil supply pipe; 45, pressure relief pipe; 46, sub-air inlet pipe; 47, mixed reformer body; 48, temperature measuring element; 49, pressure measuring element. DETAILED DESCRIPTION

[0026] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0027] In the description of the present application, the description of the terms "embodiment", "one embodiment" and "one implementation" means that the specific features, structures, materials or characteristics described in connection with the embodiment or implementation are included in at least one embodiment or implementation of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner. ​​

[0028] Referring to Figure 1 The utility model discloses a multi-fuel internal combustion engine, comprising:

[0029] Multi-fuel internal combustion engine body 1;

[0030] Gas storage tank 15, hydrogen supply assembly, natural gas supply assembly and liquefied petroleum gas supply assembly are connected respectively with gas storage tank 15;

[0031] Methanol and gasoline-diesel oil mixed reformer 11, methanol and gasoline-diesel oil supply assembly is supplied with methanol and / or gasoline-diesel oil by methanol and gasoline-diesel oil mixed reformer 11, and the periphery of methanol and gasoline-diesel oil mixed reformer 11 is equipped with mixed reformer jacket 5, and the exhaust pipe of multi-fuel internal combustion engine body 1 is communicated with mixed reformer jacket 5 through tail gas heating and cooling temperature control assembly 3, and tail gas heating and cooling temperature control assembly 3 is used to adjust the temperature of tail gas into mixed reformer jacket 5, and mixed gas supply pipe fitting and separation backflow assembly are respectively equipped between methanol and gasoline-diesel oil mixed reformer 11 and gas storage tank 15, mixed gas supply pipe fitting is used to deliver the combustible mixed gas generated in methanol and gasoline-diesel oil mixed reformer 11 after mixed reforming to gas storage tank 15, and separation backflow assembly is used to separate and backflow the methanol and / or gasoline-diesel oil not completely converted from the combustible mixed gas;

[0032] Specifically, the methanol and gasoline-diesel mixed reformer 11 is supplied with methanol and / or gasoline-diesel by the methanol and gasoline-diesel supply assembly, and the mixed reformer jacket 5 at the periphery thereof is connected to the exhaust pipe of the multi-fuel internal combustion engine body 1, so that the exhaust gas with heat discharged from the multi-fuel internal combustion engine body 1 can enter the mixed reformer jacket 5 to provide reaction conditions for the mixed reforming of the methanol and / or gasoline-diesel entering the methanol and gasoline-diesel mixed reformer 11, and the methanol and gasoline-diesel mixed reformer 11 can be provided with a catalyst required for the reaction, the exhaust gas generated after the start of the multi-fuel internal combustion engine body 1 heats the methanol and gasoline-diesel mixed reformer 11, and cooperates with the exhaust gas heating and cooling temperature control assembly 3 to make the exhaust gas enter the mixed reformer jacket 5 at a suitable temperature, the methanol and gasoline-diesel mixed reformer 11 is equivalent to a reaction kettle to produce combustible mixed gas under heating and other conditions, and the combustible mixed gas flows into the gas storage tank 15 through the mixed gas supply pipe after being generated, since the reaction is incomplete, the combustible mixed gas is mixed with methanol and / or gasoline-diesel, the methanol and / or gasoline-diesel is in a liquid state, and the methanol and / or gasoline-diesel in the combustible mixed gas flowing into the gas storage tank 15 can be separated from the combustible mixed gas and returned to the methanol and gasoline-diesel mixed reformer 11 through the setting of the separation return assembly to promote the conversion of the methanol and / or gasoline-diesel again; since the hydrogen supply assembly, the natural gas supply assembly and the liquefied petroleum gas supply assembly are provided, the gas can be used as normal fuel, and is also beneficial to be used for cold start of the multi-fuel internal combustion engine body 1, so that the exhaust gas of the multi-fuel internal combustion engine body 1 heats the methanol and gasoline-diesel mixed reformer 11, and then the methanol or / and gasoline-diesel fuel mode is switched according to the requirement, so that the gas storage tank 15 generally has the pressure brought by the combustible gas after the first use, so that the natural gas or the liquefied petroleum gas or the hydrogen gas can not be required for the start of the internal combustion engine next time, which is beneficial to the cold start of the multi-fuel internal combustion engine to heat the methanol or / and gasoline-diesel to meet the temperature requirement of the reforming and cracking reaction, the cooperation of the gas storage tank 15 and the exhaust gas heating and cooling temperature control assembly 3 solves the common problem of difficult cold start of the methanol internal combustion engine, and the multi-fuel internal combustion engine is first used as a gas combustion internal combustion engine in use.

[0033] The combustible mixed gas includes one or more of hydrogen, carbon monoxide, methanol gas, gasoline-diesel gas and gasoline-diesel catalytic cracking product alkenes.

[0034] The gas storage tank 15 is connected to the multi-fuel internal combustion engine body 1 through a pressure buffer air inlet assembly, the pressure buffer air inlet assembly includes a main air inlet pipe assembly and a pressure relief sub-air inlet pipe assembly, and the pressure relief sub-air inlet pipe assembly is opened when the pressure corresponding to the main air inlet pipe assembly exceeds the set pressure.

[0035] Specifically, in one aspect, the hydrogen supply assembly, the natural gas supply assembly and the liquefied petroleum gas supply assembly can supply one or more of hydrogen, natural gas and liquefied petroleum gas into the gas tank 15, and the supplied fuel enters the multi-fuel internal combustion engine body 1 through the pressure buffer intake assembly to supply one or more of hydrogen, natural gas and liquefied petroleum gas to the multi-fuel internal combustion engine body 1. In another aspect, the methanol and gasoline-diesel mixed reformer 11 can supply combustible mixed gas into the gas tank 15 through the mixed gas supply pipe, so that one or more of hydrogen, natural gas, liquefied petroleum gas and combustible mixed gas can be added into the multi-fuel internal combustion engine body 1 through the gas tank 15 according to actual needs. When the pressure of the fuel to be added is relatively small, the gas tank 15 adds the fuel into the multi-fuel internal combustion engine body 1 through the main intake pipe assembly. When the pressure of the fuel to be added is relatively large, the pressure relief sub-intake pipe assembly is opened, and the gas tank 15 adds the fuel into the multi-fuel internal combustion engine body 1 through the main intake pipe assembly and the pressure relief sub-intake pipe assembly at the same time. The pressure relief sub-intake pipe assembly realizes on-demand auxiliary addition while reducing the intake pressure, thereby avoiding the problem that the addition according to actual needs cannot be realized due to excessive pressure.

[0036] In the embodiment, the methanol and gasoline-diesel oil mixed reformer 11 is provided with a mixed reformer jacket 5, and the exhaust pipe of the multi-fuel internal combustion engine body 1 is communicated with the mixed reformer jacket 5 through an exhaust gas heating and cooling temperature control assembly 3, which is used to adjust the temperature of the exhaust gas entering the mixed reformer jacket 5, so that the exhaust gas can enter the mixed reformer jacket 5 at a suitable temperature and heat the methanol and gasoline-diesel oil mixed reformer 11. The methanol and gasoline-diesel oil mixed reformer 11 is equivalent to a reaction kettle, and combustible mixed gas is generated under the conditions of heating and the like, which is beneficial to heating the methanol or / and gasoline-diesel oil to meet the temperature requirement of the reforming and cracking reaction when the multi-fuel internal combustion engine body 1 is cold started. The gas storage tank 15 is connected with the multi-fuel internal combustion engine body 1 through a pressure buffer air inlet assembly, which includes a main air inlet pipe assembly and a pressure relief sub-air inlet pipe assembly. When the pressure corresponding to the main air inlet pipe assembly exceeds the set pressure, the pressure relief sub-air inlet pipe assembly is opened, so that one or more of the methanol, gasoline-diesel oil, hydrogen, natural gas and liquefied petroleum gas can be used as the fuel of the multi-fuel internal combustion engine body 1 as needed, which avoids the limitation of single fuel and makes the multi-fuel internal combustion engine body 1 be able to be configured to supply fuel flexibly, and avoids the problem that the fuel cannot be filled according to the actual demand due to excessive pressure, and improves the safety of fuel filling. In addition, the methanol and gasoline-diesel oil mixed reformer 11 and the gas storage tank 15 are respectively provided with a mixed gas supply pipe and a separation backflow assembly. The mixed gas supply pipe is used to transport the combustible mixed gas generated by the mixed reforming in the methanol and gasoline-diesel oil mixed reformer 11 to the gas storage tank 15, and the separation backflow assembly is used to separate and backflow the methanol and / or gasoline-diesel oil which is not completely converted from the combustible mixed gas, which improves the conversion rate of the methanol and / or gasoline-diesel oil and the content of the combustible mixed gas, and improves the fuel use economy.

[0037] The utility model discloses, can be in different application scene respectively according to actual demand fills hydrogen, (methane) natural gas, liquid petroleum gas, methanol and gasoline and diesel oil (indirectly in the form of combustible mixed gas into multi-fuel internal combustion engine body 1) one or several, avoid the limitation of single fuel, make multi-fuel internal combustion engine body 1 can be configured to flexibly supply fuel, solve the problem of operation economy, filling convenience, improve economic benefit and reach the effect of energy saving and emission reduction, and hydrogen, methanol is green fuel, (methane) natural gas can also be obtained from biogas purification of anaerobic fermentation, therefore also can be green fuel, methanol, hydrogen and natural gas these three fuels can be green fuel, liquid petroleum gas is also a kind of relatively clean and environmental protection fuel, meet the requirement of energy saving and emission reduction, especially in the green carbon emission reduction popularization and application on ship, train, heavy truck and passenger car, will play a huge role, in actual use, can adopt methanol and / or gasoline and diesel oil reforming combustible mixed gas fuel 1 mode, hydrogen gas single fuel 2 mode supplied by hydrogen gas supply assembly, natural gas single fuel 3 mode of natural gas supply assembly, liquid petroleum gas single fuel 4 mode of liquid petroleum gas supply assembly, methanol and / or gasoline and diesel oil reforming combustible mixed gas+hydrogen gas double fuel combination 5 mode supplied by hydrogen gas supply assembly, methanol and / or gasoline and diesel oil reforming combustible mixed gas fuel+natural gas double fuel combination 6 mode of natural gas supply assembly, methanol and / or gasoline and diesel oil reforming combustible mixed gas fuel+liquid petroleum gas double fuel combination 7 mode of liquid petroleum gas supply assembly, hydrogen+natural gas double fuel combination 8 mode of natural gas supply assembly supplied by hydrogen gas supply assembly, hydrogen+liquid petroleum gas double fuel combination 9 mode of liquid petroleum gas supply assembly supplied by hydrogen gas supply assembly, natural gas fuel+liquid petroleum gas double fuel combination methanol reforming catalyst 10 mode of liquid petroleum gas supply assembly of natural gas supply assembly, all can be used as the fuel of multi-fuel internal combustion engine.

[0038] As Figure 1 Shown, as an alternative embodiment, for hydrogen gas supply assembly, hydrogen gas from hydrogen cylinder 25, through hydrogen gas supply pipe 41, in turn through hydrogen gas electric valve 26, hydrogen gas automatic pressure response pump 27, single check valve four 28 flow to gas holder 15, again through pressure buffer admission assembly enters multi-fuel internal combustion engine body 1, the check valve four 28 is used for the one-way flow of hydrogen gas, and the hydrogen source of hydrogen cylinder 25 can be hydrogen filling station outside hydrogen filling, can also be the solid hydrogen storage hydrogen of multi-fuel internal combustion engine matching.

[0039] For the natural gas supply assembly, natural gas flows from the natural gas cylinder 29, through the natural gas supply pipe 42, sequentially through the natural gas electric valve 30, the natural gas automatic pressure sensing pump 31, the one-way valve five 32 for the one-way flow of natural gas, to the gas storage tank 15, and then through the pressure buffer intake assembly into the multi-fuel internal combustion engine body 1. Natural gas can also be replaced by methane purified from biogenic anaerobic fermentation, so it can also be green fuel.

[0040] Similarly, for the liquefied petroleum gas (mainly composed of propane and butane) supply assembly, liquefied petroleum gas flows from the liquefied petroleum gas cylinder 33, through the liquefied petroleum gas supply pipe 43, sequentially through the liquefied petroleum gas electric valve 34, the liquefied petroleum gas automatic pressure sensing pump 35, and the one-way valve six 36 for the one-way flow of liquefied petroleum gas, to the gas storage tank 15, and then through the pressure buffer intake assembly into the multi-fuel internal combustion engine body 1.

[0041] One or more of the above can be selected for fuel supply.

[0042] Because natural gas can be replaced by methane purified from biogenic anaerobic fermentation, the above-mentioned methanol, hydrogen, and (methane) natural gas and liquefied petroleum gas can all be green fuels, meeting green environmental protection requirements.

[0043] As shown in Figure 1 As an optional embodiment of the present application, the main intake pipe assembly includes a main intake pipe 16 for connecting the gas storage tank 15 and the multi-fuel internal combustion engine body 1, and a flow regulating valve 17 installed on the main intake pipe 16. The pressure relief sub-intake pipe assembly includes a pressure relief pipe 45, a buffer tank 19, and a sub-intake pipe 46. The gas storage tank 15 and the buffer tank 19 are connected through the pressure relief pipe 45, and a pressure relief valve 18 is installed on the pressure relief pipe 45. The buffer tank 19 is connected to the multi-fuel internal combustion engine body 1 through the sub-intake pipe 46, and a one-way valve two 20 is installed on the sub-intake pipe 46 for the input of combustible mixed gas.

[0044] Specifically, after the combustible mixed gas flows into the gas storage tank 15, if the pressure is within the set threshold, the combustible mixed gas enters the multi-fuel internal combustion engine body 1 through the main intake pipe 16 and the flow regulating valve 17. After the combustible mixed gas flows into the gas storage tank 15, if the pressure is above the set threshold, part of the combustible mixed gas enters the pressure relief pipe 45, passes through the pressure relief valve 18, enters the buffer tank 19, and then flows out through the sub-intake pipe 46, and enters the multi-fuel internal combustion engine body 1 through the one-way valve two 20. When the sub-intake pipe 46 is connected to the multi-fuel internal combustion engine body 1 alone, a flow regulating valve can also be provided on the sub-intake pipe 46.

[0045] As Figure 1 shown, as an optional embodiment of the present application, the branch air inlet pipe 46 is in communication with the main air inlet pipe 16 at a position between the flow regulating valve 17 and the gas storage tank 15.

[0046] Specifically, the common pipe body is shared by the main air inlet pipe assembly and the pressure relief branch air inlet pipe assembly when entering the multi-fuel internal combustion engine body 1, so that the pipe fittings can be saved, and the communication position of the branch air inlet pipe 46 and the main air inlet pipe 16 is between the flow regulating valve 17 and the gas storage tank 15, so that the flow can be regulated by the flow regulating valve 17.

[0047] It should be noted that a one-way valve can also be provided on the main air inlet pipe 16.

[0048] As Figure 1 shown, as an optional embodiment of the present application, the exhaust pipe of the multi-fuel internal combustion engine body 1 includes an exhaust pipe one 2, an exhaust pipe two 4, and an exhaust pipe three 12, the exhaust pipe one 2 is used to communicate the exhaust gas outlet of the multi-fuel internal combustion engine body 1 and the air inlet of the exhaust gas heating and cooling temperature control assembly 3, the exhaust pipe two 4 is used to communicate the air outlet of the exhaust gas heating and cooling temperature control assembly 3 and the mixed reformer jacket 5, and one end of the exhaust pipe three 12 is in communication with the mixed reformer jacket 5, and the other end is an exhaust end.

[0049] For the exhaust gas heating and cooling temperature control assembly 3, an electric heater can be used for heating: using electric current to convert energy into heat; a hot air blower can also be used: heating air and blowing it out, which is used to warm indoor air, or a cast heating element can also be used: for example, a ceramic heating element, which can reach high temperature in a short time. For the cooling part, a cooler (such as a water cooler or an air cooler) can be used: through a heat exchanger device to transfer heat to a fluid, or a fan can be used to take away heat. The exhaust gas heating and cooling temperature control assembly 3 uses a combination of heating and cooling components, which work independently or simultaneously to achieve the required exhaust gas temperature of the methanol and gasoline-diesel mixed reformer 11.

[0050] Specifically, as Figure 1As shown, the exhaust pipe includes exhaust pipe one 2, exhaust pipe two 4 and exhaust pipe three 12, exhaust pipe one 2 is used to communicate the exhaust pipe one 2 and the exhaust gas heating and cooling temperature control assembly 3, one end of the exhaust pipe two 4 is communicated with the gas outlet of the exhaust gas heating and cooling temperature control assembly 3, the other end is communicated into the mixed reformer jacket 5, so as to save energy by controlled heating of the methanol and gasoline-diesel mixed reformer 11, the exhaust pipe three 12 can be emptied, or can continue to connect other devices for waste heat utilization.

[0051] Because the high temperature of the exhaust gas is conducive to promoting the reforming and cracking conversion of methanol and gasoline-diesel in the methanol and gasoline-diesel mixed reformer 11, when the temperature of the exhaust gas is not high enough, it is not conducive to promoting the complete reforming and cracking conversion of methanol and gasoline-diesel in the methanol and gasoline-diesel mixed reformer 11 into gas, but it can be compensated by the exhaust gas heating and cooling temperature control assembly 3, therefore the temperature of the exhaust gas heating and cooling temperature control assembly 3 can be set according to actual needs to determine whether to compensate for the high temperature required for reforming and cracking conversion when the temperature of the exhaust gas is not high enough.

[0052] As shown in Figure 1 , Figure 2 and Figure 3 As an optional embodiment of the present application, the methanol and gasoline-diesel mixed reformer 11 includes a mixed reformer body 47 and a mixed reformer liquid storage chamber 6 arranged in the mixed reformer body 47, the mixed reformer liquid storage chamber 6 is provided with a perforated plate, the perforated plate is used to hold a catalyst, the catalyst includes a gasoline-diesel reforming catalyst 8 and a methanol reforming catalyst 10.

[0053] Specifically, the methanol and gasoline-diesel supply assembly supplies methanol and / or gasoline-diesel, the methanol and gasoline-diesel supply assembly includes a methanol and gasoline-diesel tank 21, a tank electric valve 22, a methanol and gasoline-diesel automatic pressure sensing pump 23, and a methanol and gasoline-diesel oil supply pipe 44, the methanol and gasoline-diesel oil supply pipe 44 is used to communicate the inside of the methanol and gasoline-diesel tank 21 and the inside of the methanol and gasoline-diesel mixed reformer 11, along the flow direction of the methanol and / or gasoline-diesel from the methanol and gasoline-diesel tank 21 to the methanol and gasoline-diesel mixed reformer 11, the methanol and gasoline-diesel oil supply pipe 44 is sequentially provided with the tank electric valve 22, the methanol and gasoline-diesel automatic pressure sensing pump 23, and a one-way valve three 24, the one-way valve three 24 is used to prevent the reverse flow of methanol and / or gasoline-diesel, in addition, because the methanol and gasoline-diesel automatic pressure sensing pump 23 is arranged at the outlet end of the methanol and gasoline-diesel tank 21, the infusion amount and pressure can be controlled in advance, so that the gas storage tank 15 has a larger pressure redundancy.

[0054] In this embodiment, the methanol and / or gasoline and diesel oil in the methanol and gasoline and diesel oil tank 21 passes through the tank electric valve 22 on the methanol and gasoline and diesel oil supply pipe 44, the automatic pressure sensing pump 23 of the methanol and gasoline and diesel oil and the check valve 24, enters the methanol and gasoline and diesel oil mixing reformer 11 (the mixing reformer liquid storage chamber 6), and the separated backflow component also enters the methanol and gasoline and diesel oil mixing reformer 11 (the mixing reformer liquid storage chamber 6), and contacts the catalyst in the methanol and gasoline and diesel oil mixing reformer 11, and is heated by the waste heat of the flue gas in the exhaust pipe, and reacts to generate a combustible mixed gas.

[0055] When the porous plate is provided with one, the catalyst is mixed and placed on the porous plate.

[0056] As shown in Figure 1 , Figure 2 and Figure 3 , as an optional embodiment of the utility model, the porous plate includes a porous plate one 7 and a porous plate two 9, the porous plate one 7 is used to place the gasoline and diesel oil reforming catalyst 8, and the porous plate two 9 is used to place the methanol reforming catalyst 10.

[0057] Specifically, when the porous plate is divided into multiple, each catalyst is placed separately, the positions of the porous plate one 7 and the porous plate two 9 can be interchanged, and the catalyst is placed separately, so that the amount of each single consumption is more clear, and timely supplement is facilitated.

[0058] As an optional embodiment of the utility model, the porous plate one 7 and the porous plate two 9 are arranged side by side and are parallelly arranged or perpendicularly arranged with the flow direction of the combustible mixed gas.

[0059] Specifically, Figure 2 the porous plate one 7 and the porous plate two 9 are parallelly arranged with the flow direction of the combustible mixed gas, Figure 2 the positions of the upper and lower layer catalysts shown in the figure are interchangeable, and the two kinds of catalysts can also be mixed together; Figure 3 the porous plate one 7 and the porous plate two 9 are perpendicularly arranged with the flow direction of the combustible mixed gas, Figure 3 in the methanol and gasoline and diesel oil mixing reformer 11, the mixing reformer liquid storage chamber 6 can be a tube type heat exchange device as shown in Figure 2 , the mixing reformer jacket 5 is heated by the tail gas, and the catalyst is placed in the formed cavity, so that the device has the advantage that the catalyst is heated more uniformly.

[0060] As shown in Figure 2 , as an optional embodiment of the utility model, the mixing reformer liquid storage chamber 6 is further provided with a temperature measuring element 48 and a pressure measuring element 49, the temperature measuring element 48 is used to measure the temperature of the catalyst, and the pressure measuring element 49 is used to measure the internal pressure of the mixing reformer liquid storage chamber 6.

[0061] Specifically, the temperature measuring member 48 comprises a temperature gauge for measuring the temperature inside the mixed reformer liquid chamber 6, and the probe of the temperature gauge is inserted into the catalyst; the pressure measuring member 49 comprises a pressure gauge for measuring the pressure inside the mixed reformer liquid chamber 6, and the pressure measuring member 49 is installed on the top of the gas outlet of the mixed reformer liquid chamber 6, so as to select the appropriate temperature of the tail gas for heating and cooling the temperature control assembly 3, and to ensure safety.

[0062] As shown in Figure 1 As an optional embodiment of the present application, the separation and reflux assembly comprises a one-way valve 37, a gas-liquid separator 38 and a liquid return pipe 39, the liquid return pipe 39 is used for connecting the gas tank 15 and the mixed reformer liquid chamber 6, the gas-liquid separator 38 and the one-way valve 37 are sequentially installed on the liquid return pipe 39 along the flow direction of the methanol and / or gasoline diesel oil, and the one-way valve 37 is used for the one-way flow of the methanol and / or gasoline diesel oil.

[0063] Specifically, after the combustible mixed gas flows into the gas tank 15, since the reaction is incomplete, the combustible mixed gas is mixed with the methanol and / or gasoline diesel oil, and the methanol and / or gasoline diesel oil is in liquid state, therefore, the methanol and / or gasoline diesel oil in the combustible mixed gas flowing into the gas tank 15 can be separated from the combustible mixed gas by the separation and reflux assembly, and flows back to the mixed reformer 11 for conversion reaction again, thereby improving the conversion rate of the methanol and / or gasoline diesel oil and the content of the combustible mixed gas.

[0064] As shown in Figure 1 As an optional embodiment of the present application, the mixed gas supply pipe assembly comprises a methanol and gasoline diesel oil reforming gas connecting pipe 40, a mixed gas electric valve 13 and a one-way valve 14, the methanol and gasoline diesel oil reforming gas connecting pipe 40 is used for connecting the mixed reformer liquid chamber 6 and the gas tank 15, the mixed gas electric valve 13 and the one-way valve 14 are sequentially arranged along the flow direction of the combustible mixed gas, and the one-way valve 14 is used for the one-way flow of the combustible mixed gas.

[0065] Specifically, the combustible mixed gas generated by the catalytic reaction in the mixed reformer 11 enters the gas tank 15 through the mixed gas electric valve 13 and the one-way valve 14, and then enters the multi-fuel internal combustion engine body 1 through the main gas inlet pipe assembly or the pressure relief sub-gas inlet pipe assembly, and the gas in the gas tank 15 enters the multi-fuel internal combustion engine body 1 through the mixed gas supply pipe assembly, the combustible mixed gas in the mixed gas electric valve 13 can only flow into the gas tank 15 in one direction, and the methanol and / or gasoline diesel oil which is not completely converted is also mixed in the combustible mixed gas and enters the gas tank 15.

[0066] It should be noted that the methanol and gasoline-diesel mixed reformer 11, the gas tank 15 and the buffer tank 19 all need high-pressure containers, and the corresponding connecting pipelines are all high-pressure pipelines, and the first choice is a stainless steel high-pressure container and a high-pressure pipeline, and the corresponding gas-liquid separator 38, the flow regulating valve, the electric valve, the pressure sensing pump, the check valve, the pressure gauge, the temperature gauge and the like are all high-pressure resistant components.

[0067] A vehicle comprising a multi-fuel internal combustion engine as claimed in any one of the preceding embodiments.

[0068] The multi-fuel internal combustion engine provided by the utility model, whether the methanol reforming produces carbon monoxide and hydrogen or the gasoline-diesel reforming produces alkene and hydrogen, the combustion heat value of the theoretical calculation is increased, and the gas combustion of the internal combustion engine is more sufficient than the liquid combustion, thus better economic efficiency and environmental protection are achieved, and the theoretical heat value of diesel is greater than that of gasoline, and the use of diesel is more economical.

[0069] The utility model also can be applied to steamers, etc., when the multi-fuel internal combustion engine provided by the utility model is applied to vehicles or steamers, power can be directly output, or a battery can be coupled as a range extender special for charging, and the charging is economic and environmental protection under the condition of charging convenience, and one of methanol, gasoline, diesel, hydrogen, natural gas and liquefied petroleum gas can be selected for refueling under the condition of charging inconvenience, and the economic efficiency, convenience, energy saving and emission reduction are realized.

[0070] The above merely describes specific embodiments of the utility model, enabling those skilled in the art to understand or implement the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features of the utility model.

[0071] Although the utility model discloses as above, the protection scope of the utility model is not only limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will all fall into the protection scope of the utility model.

Claims

1. A multi-fuel internal combustion engine characterized by comprising: The application relates to a multi-fuel internal combustion engine body (1), which comprises: a gas storage tank (15) connected with a hydrogen supply assembly, a natural gas supply assembly and a liquefied petroleum gas supply assembly respectively; a methanol and gasoline-diesel mixed reformer (11) supplied with methanol and / or gasoline-diesel by a methanol and gasoline-diesel supply assembly, the periphery of the methanol and gasoline-diesel mixed reformer (11) being provided with a mixed reformer jacket (5), an exhaust gas heating and cooling temperature control assembly (3) being arranged between an exhaust pipe of the multi-fuel internal combustion engine body (1) and the mixed reformer jacket (5), the exhaust gas heating and cooling temperature control assembly (3) being used for adjusting the temperature of the exhaust gas entering the mixed reformer jacket (5), and a mixed gas supply pipe and a separation backflow assembly being respectively arranged between the methanol and gasoline-diesel mixed reformer (11) and the gas storage tank (15), the mixed gas supply pipe being used for conveying combustible mixed gas generated by mixed reforming in the methanol and gasoline-diesel mixed reformer (11) into the gas storage tank (15), and the separation backflow assembly being used for separating and backflowing uncompletely converted methanol and / or gasoline-diesel from the combustible mixed gas. The gas storage tank (15) is connected with the multi-fuel internal combustion engine body (1) through a pressure buffer air intake assembly, the pressure buffer air intake assembly comprises a main air intake pipe assembly and a pressure relief sub-air intake pipe assembly, and the pressure relief sub-air intake pipe assembly is opened when the corresponding pressure of the main air intake pipe assembly exceeds the set pressure. The main air intake pipe assembly comprises a main air intake pipe (16) and a flow regulating valve (17), the main air intake pipe (16) is used for connecting the gas storage tank (15) and the multi-fuel internal combustion engine body (1), the flow regulating valve (17) is arranged on the main air intake pipe (16), the pressure relief sub-air intake pipe assembly comprises a pressure relief pipe (45), a buffer tank (19) and a sub-air intake pipe (46), the gas storage tank (15) is connected with the buffer tank (19) through the pressure relief pipe (45), a pressure relief valve (18) is arranged on the pressure relief pipe (45), the buffer tank (19) is connected with the multi-fuel internal combustion engine body (1) through the sub-air intake pipe (46), a one-way valve (20) is arranged on the sub-air intake pipe (46), and the one-way valve (20) is used for inputting the combustible mixed gas.

2. A multi-fuel internal combustion engine according to claim 1, characterized in that The end of the sub-air intake pipe (46) far from the buffer tank (19) is connected with the main air intake pipe (16), and the connection position of the sub-air intake pipe (46) and the main air intake pipe (16) is located between the flow regulating valve (17) and the gas storage tank (15).

3. A multi-fuel internal combustion engine according to claim 2, characterized in that ​ 4. A multi-fuel internal combustion engine according to claim 1, characterized in that The exhaust pipe of the multi-fuel internal combustion engine body (1) comprises an exhaust pipe one (2), an exhaust pipe two (4) and an exhaust pipe three (12), the exhaust pipe one (2) is used to connect the exhaust outlet of the multi-fuel internal combustion engine body (1) and the gas inlet of the exhaust heating and cooling temperature control component (3), the exhaust pipe two (4) is used to connect the gas outlet of the exhaust heating and cooling temperature control component (3) and the mixed reformer jacket (5), one end of the exhaust pipe three (12) is connected with the mixed reformer jacket (5) and the other end is the exhaust end.

5. A multi-fuel internal combustion engine according to any one of claims 1-4, characterized in that, The methanol and gasoline-diesel mixed reformer (11) comprises a mixed reformer body (47) and a mixed reformer liquid storage chamber (6) arranged in the mixed reformer body (47), the mixed reformer liquid storage chamber (6) is provided with a porous plate, the porous plate is used to hold the catalyst, the catalyst comprises a gasoline-diesel reforming catalyst (8) and a methanol reforming catalyst (10).

6. A multi-fuel internal combustion engine according to claim 5, characterized in that The porous plate comprises a porous plate one (7) and a porous plate two (9), the porous plate one (7) is used to hold the gasoline-diesel reforming catalyst (8), the porous plate two (9) is used to hold the methanol reforming catalyst (10), the porous plate one (7) and the porous plate two (9) are arranged side by side and are parallel or perpendicular to the flow direction of the combustible mixed gas.

7. A multi-fuel internal combustion engine according to claim 6, characterized in that The mixed reformer liquid storage chamber (6) is further provided with a temperature measuring element (48) and a pressure measuring element (49), the temperature measuring element (48) is used to measure the temperature of the catalyst, the pressure measuring element (49) is used to measure the internal pressure of the mixed reformer liquid storage chamber (6).

8. A multi-fuel internal combustion engine according to claim 5, characterized in that The separation and reflux component comprises a one-way valve seven (37), a gas-liquid separator (38) and a liquid return pipe (39), the liquid return pipe (39) is used to connect the gas storage tank (15) and the mixed reformer liquid storage chamber (6), the gas-liquid separator (38) and the one-way valve seven (37) are sequentially installed in the liquid return pipe (39) along the flow direction of the methanol and / or gasoline-diesel, the one-way valve seven (37) is used for one-way flow of the methanol and / or gasoline-diesel.

9. A multi-fuel internal combustion engine according to claim 5, characterized in that The mixed gas supply pipe element comprises a methanol and gasoline-diesel reforming gas connecting pipe (40), a mixed gas electric valve (13) and a one-way valve one (14), the methanol and gasoline-diesel reforming gas connecting pipe (40) is used to connect the mixed reformer liquid storage chamber (6) and the gas storage tank (15), the mixed gas electric valve (13) and the one-way valve one (14) are sequentially arranged along the flow direction of the combustible mixed gas, the one-way valve one (14) is used for one-way flow of the combustible mixed gas.

10. A vehicle characterized by comprising: A multi-fuel internal combustion engine comprising a multi-fuel internal combustion engine according to any one of claims 1-9.

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