阅读说明：本技术 一种环保燃料增程式电动汽车的发电系统或动力设备 (Power generation system or power equipment of environment-friendly fuel range-extending type electric automobile ) 是由 翁志远 于 2019-09-26 设计创作，主要内容包括：本发明实施例涉及一种环保燃料增程式电动汽车的发电系统或动力设备,包括依次连通的燃料储罐、发动机、发电机、控制器、电动机构成；所述燃料储罐为低温液体燃料储罐或者LNG杜瓦罐,所存储的燃料为LNG液体；经汽化器吸热后成为天然气；属于环保燃料；且LNG相对于汽油和柴油成本更低；增程式发动机为最大稳定工况,有效热效率很高；拥有本发明所提供的LNG天然气增程式发动机后,可打消里程忧虑；同时还可减少电动汽车的电池容量；在炎热夏天,本实施例所提供的环保燃料的电动汽车,不需要安装空调就能够保障电动汽车内部的制冷；可以节省空调的设备成本以及设备空间,同时还能够节约空调设备所消耗的大量电能,一举多得。(The embodiment of the invention relates to a power generation system or power equipment of an environment-friendly fuel range-extending type electric automobile, which comprises a fuel storage tank, an engine, a generator, a controller and a motor which are sequentially communicated; the fuel storage tank is a low-temperature liquid fuel storage tank or an LNG dewar tank, and the stored fuel is LNG liquid; absorbing heat by a vaporizer to form natural gas; belongs to environment-friendly fuel; and LNG costs less than gasoline and diesel; the range-extended engine is in the maximum stable working condition, and the effective thermal efficiency is very high; after the LNG natural gas extended-range engine provided by the invention is provided, mileage worries can be eliminated; meanwhile, the battery capacity of the electric automobile can be reduced; in hot summer, the electric automobile with the environment-friendly fuel provided by the embodiment can ensure refrigeration in the electric automobile without installing an air conditioner; the air conditioner can save the equipment cost and the equipment space of the air conditioner, and can save a large amount of electric energy consumed by the air conditioner at the same time, thereby achieving multiple purposes.)

1. A power generation system or power equipment of an environment-friendly fuel range-extended electric automobile is characterized by comprising a fuel storage tank, an engine, a generator, a controller and a motor which are sequentially communicated; the extended range electric automobile power generation system or power equipment is also provided with a super capacitor and/or a battery energy storage system; the energy storage system is in communication with the controller or the electric motor.

2. The power generation system or power plant of an environmentally friendly fuel extended range electric vehicle of claim 1, wherein the fuel storage tank is a cryogenic liquid fuel storage tank or an LNG dewar and the stored fuel is an LNG cryogenic liquid.

3. The power generation system or power plant of the environmentally friendly fuel range-extended electric vehicle as claimed in claim 2, wherein a control valve and a carburetor are further provided between the fuel storage tank and the engine; and enabling the vaporizer to exchange heat with an engine water tank or enabling cold air formed by the vaporizer to cool a water tank.

4. The power generation system or power plant of an environmentally friendly fuel range-extended electric vehicle as claimed in claim 2 or 3, wherein a second control valve and a second heat exchanger are further provided between the fuel storage tank and the engine.

5. The power generation system or power plant of an environmentally friendly fuel range-extended electric vehicle as claimed in claim 1, wherein the controller is further connected to a super capacitor energy storage and/or battery energy storage system.

6. The power generation system or power equipment of the environment-friendly fuel extended range electric vehicle as claimed in claim 5, wherein the super capacitor energy storage and/or battery energy storage system is further provided with an external power charging interface.

7. The process of the power generation system or the power equipment of the environment-friendly fuel range-extended electric automobile is suitable for the power generation system or the power equipment of the environment-friendly fuel range-extended electric automobile in any one of claims 1 to 6;

the method comprises the following steps:

the fuel stored in the fuel storage tank is conveyed to the engine to be combusted and work done through a control valve and rotate at a high speed; the engine drives the generator to rotate to generate power and output electric energy, and the electric energy is regulated and controlled by the controller to drive the motor to rotate at a high speed and drive the electric automobile equipment to run;

the power generation system or the power equipment of the environment-friendly fuel range-extended electric automobile is also provided with a super capacitor and/or a battery energy storage system; the energy storage system is communicated with the controller;

further, the fuel storage tank is a cryogenic liquid fuel storage tank or an LNG dewar, and the stored cryogenic liquid fuel includes, but is not limited to, LNG liquid;

further, a carburetor is arranged between the fuel storage tank and the engine; the vaporizer absorbs heat energy of the engine water tank; or absorbing environmental heat energy outside the vehicle body;

further, a second heat exchanger is arranged between the fuel storage tank and the engine; the second heat exchanger is arranged inside the body of the electric automobile.

Technical Field

The invention relates to the field of electric automobiles or electric buses, refrigerated vehicles and the like, in particular to a power generation system or power equipment of an environment-friendly fuel range-extending type electric automobile.

Background

The electric automobile has the advantages of low noise, energy conservation, environmental protection, economy, quick acceleration, simple structure, convenient maintenance, easy maintenance and the like; but also has the problems of short endurance mileage, difficult charging, slow charging and the like. In addition, the power battery needs to be replaced in about 5 years, and the recovery of the power battery faces the difficulties of high recovery cost and difficult recovery technology.

The electric automobile comprises but is not limited to an electric automobile, an electric bus, a fishing boat and other mobile equipment; present electric automobile or electric bus are mostly to fill electric pile and charge, because reasons such as battery capacity and quality, cause electric bus continuation of the journey weak point, short scheduling problem of battery life.

The surface of the hydrogen fuel cell automobile meets the requirements of energy conservation and environmental protection; but the preparation and purification of hydrogen requires energy consumption; the hydrogen needs about 70MPa high pressure for compression and also consumes energy; the hydrogen storage and hydrogen transportation links and the use link have great loss, and the efficiency is further reduced; compared with a mature lithium battery, the hydrogen fuel cell vehicle has high storage cost and large transportation risk, and the infrastructure of a hydrogen station needs high investment; according to data published by the U.S. energy agency, the service life of the fuel cell system is short when the target life of the fuel cell system is 5000 hours in 2020; the platinum metal is used as a catalyst in the power generation process of the hydrogen fuel cell, the price is very high due to the scarcity of the platinum metal, and if the hydrogen fuel cell is continuously produced on a large scale in the future, the more the cost of the platinum metal is needed, the more scarcity and the higher cost are caused. And key parts such as a high-pressure hydrogen storage tank, an ultrahigh-pressure air compressor, a hydrogen circulating pump and the like are arranged, so that the technical difficulty is high, an industrial chain is difficult to form, a large number of hydrogen refueling stations are built all over the country, and the total investment is extremely large.

In hot summer, the electric bus is provided with and started with the air conditioning equipment for cooling for the comfort of personnel, so that the energy loss of the battery of the electric bus is more severe, and the electric bus needs to be charged frequently; even the usage rate of the electric bus which is purchased with high cost is only 50 percent, and two buses are needed to be purchased.

In addition, refrigerated transport equipment such as refrigerated trucks and fishing boats; in the transportation process, energy is consumed to realize the travelling of the refrigerator car, and a large amount of energy is also consumed at the same time, so that the refrigerator car is used for refrigeration equipment of the refrigerator car or a fishing boat and the like, or a large amount of ice blocks are required to be transported, ice is made, energy is consumed, and personnel are required to carry the refrigerator car.

Disclosure of Invention

The embodiment of the invention provides a power generation system or power equipment of an environment-friendly fuel range-extending type electric automobile, which comprises a fuel storage tank, an engine, a generator, a controller and a motor which are sequentially communicated; the fuel storage tank is a low-temperature liquid fuel storage tank or an LNG dewar tank, and the stored low-temperature liquid fuel is LNG liquid.

The LNG liquid (with the temperature of minus 162 ℃ below zero) is gasified into natural gas by the evaporator in an endothermic way; the engine is input to perform combustion work and output electric energy, and the output electric energy is used for charging an electric automobile battery or directly driving an electric motor of the electric automobile.

Firstly, LNG or natural gas belongs to environment-friendly fuel; the pollution to the environment is very small;

meanwhile, LNG or natural gas has low cost compared with gasoline and diesel oil;

more importantly, the extended range electric automobile can enable the engine to have stable working condition and rotating speed and be in the state of optimal and highest working efficiency; thereby achieving the purpose of energy saving;

in addition, the electric automobile with the extended-range engine can obviously reduce the number and capacity of batteries of the electric automobile; meanwhile, the extended range engine works and can be well matched with the super capacitor energy storage, so that the charging and power generation times of the battery energy storage can be reduced to the maximum extent, and the service life of the battery of the electric automobile can be obviously prolonged;

after the electric automobile is provided with the extended-range engine, the mileage worries of a driver can be thoroughly eliminated; meanwhile, the number of charging piles can be reduced; the popularization speed of the electric automobile can be accelerated;

in addition, in hot summer, the electric bus using the environment-friendly fuel provided by the embodiment of the invention can ensure the internal refrigeration of the bus without installing an air conditioner; the cost and the equipment space of the air conditioning equipment can be saved, and a large amount of electric energy consumed by the air conditioning equipment can be saved.

The fishing boat or the refrigerator car can provide cold for the fishing boat or the refrigerator car equipment by using cold released in the LNG liquid gasification process at minus 162 ℃, thereby achieving multiple purposes.

The embodiment of the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a power generation system or power equipment of an environment-friendly fuel range-extended electric vehicle, including a fuel storage tank, an engine, a generator, a controller, and a motor, which are sequentially connected; the extended range electric automobile power generation system or power equipment is also provided with a super capacitor and/or a battery energy storage system; the energy storage system is in communication with the controller or the electric motor.

The fuel stored in the fuel storage tank is conveyed to the engine to do work through the control valve and drive the engine to rotate at a high speed, the engine drives the generator to rotate to output electric energy, and the electric motor is driven to rotate at a high speed after the adjustment and control of the controller and drives electric automobile (including electric buses and electric buses) equipment or ship equipment to operate.

In a second aspect, in an embodiment of the present invention, the fuel storage tank is a cryogenic liquid fuel storage tank or an LNG dewar, and the stored fuel is a (liquefied natural gas) LNG cryogenic liquid;

further, a carburetor is arranged between the fuel storage tank and the engine; the vaporizer is arranged outside the electric automobile body and absorbs environmental energy to realize LNG gasification; or the formed cold air is used for cooling the engine, or the vaporizer and the engine cooling water tank are directly used for heat exchange, so that the excess heat energy generated by the engine is absorbed and the temperature of the water tank is reduced;

further, a second heat exchanger is arranged between the fuel storage tank and the engine; the second heat exchanger is arranged in a box body of the electric bus equipment or the ship equipment; utilizing the latent heat of vaporization (about 510kj/kg) absorbed by the LNG liquid vaporization process at minus 162 ℃; and sensible heat from minus 162 ℃ to ambient temperature (about 900 kj/kg); the total absorbed energy of the two is about 1400 kj/kg; in hot summer, after the second control valve is opened, the LNG liquid at minus 162 ℃ enters the second heat exchanger to absorb heat, so that the air-conditioning refrigeration function inside the box body of the electric bus can be realized; or realize the refrigeration and the refrigeration in mobile equipment such as a refrigerator car, a fishing boat and the like.

Furthermore, a third control valve and a third heat exchanger are arranged between the fuel storage tank and the engine and used for cooling engine lubricating oil or other refrigeration requirements.

In a third aspect, in an embodiment of the present invention, the generator outputs electric energy, and the electric energy is connected to the controller; the controller regulates and controls and drives the motor to rotate at a high speed; in addition, the controller is also connected with a super capacitor energy storage and/or battery energy storage system;

the starting current is large when the electric automobile is started, the super capacitor energy storage and/or battery energy storage system provides electric energy, and a power generation system or power equipment of the environment-friendly fuel extended-range electric automobile is started manually or according to the battery storage capacity; the super capacitor energy storage and/or battery energy storage system is connected with the controller; a strong power current is output to the motor of the electric vehicle.

When traffic lights of electric vehicles (electric buses) and the like or the electric vehicles enter a bus station, a motor of the electric buses does not work, and at the moment, a power generation system or power equipment of the environment-friendly fuel range-extended electric vehicle still continues to operate and output power generation, so that the shortage of batteries is compensated; when the electric bus is restarted, the state is close to full power.

The service life of the battery can be shortened due to frequent starting and stopping of the electric bus and frequent charging and discharging of the battery; therefore, the super capacitor energy storage is preferably used for energy storage;

or a super capacitor is arranged between the battery energy storage and the controller for storing energy; when the electric bus is frequently started and stopped, firstly, the super-capacitor energy storage system frequently releases electric energy and charges the electric bus frequently; the energy storage of the battery is only put into use when the battery is deeply discharged, so that the charging and discharging times of the battery can be obviously reduced, and the service life of the battery is favorably prolonged (if the conditions allow, a super capacitor energy storage system is adopted as far as possible).

In a fourth aspect, in the embodiment of the present invention, the super capacitor energy storage and/or battery energy storage system is further provided with an external power charging interface, which is used for charging an electric vehicle (bus) by using a charging pile or a bus station.

In a fifth aspect, the embodiment of the invention is a power generation system or power equipment capable of better explaining the environment-friendly fuel range-extended electric vehicle, and has practicability, novelty and creativity; the embodiment of the invention also provides a process for a power generation system or power equipment of the environment-friendly fuel range-extended electric automobile; the details are as described in claim 7.

The embodiment of the invention has the beneficial effects that:

the embodiment of the invention provides a power generation system or power equipment of an environment-friendly fuel range-extending type electric automobile, which comprises a fuel storage tank, an engine, a generator, a controller and a motor which are sequentially communicated;

further, the fuel storage tank is a cryogenic liquid fuel storage tank or an LNG dewar, and the stored fuel is an LNG cryogenic liquid.

Furthermore, the power generation system or the power equipment of the extended range electric automobile is also provided with a super capacitor and/or a battery energy storage system; the energy storage system is in communication with the controller or the electric motor.

Transportation equipment such as electric automobiles, electric buses and the like are often in variable working condition states such as starting, accelerating, ascending, descending, decelerating, stopping and the like; conventional engines operate in this state and the effective thermal efficiency of the fuel is very low. The electric automobile can just overcome the problem, but the endurance mileage of the electric automobile and the short service life of the battery are also problems; the super capacitor is adopted for energy storage, so that the problem of frequent charging and discharging of the electric automobile can be solved, and meanwhile, the output starting current is also very large, so that the super capacitor is very suitable for power equipment of the electric automobile and the electric bus, which is frequently started and frequently stopped; however, the super capacitor energy storage has the problems of high cost, huge volume and short endurance mileage. Therefore, the power generation equipment is installed on the electric automobile and the electric bus, and the super capacitor energy storage and/or the battery energy storage are/is continuously charged; the problems of short endurance mileage and the above problems of the electric automobile or the electric bus can be well solved.

Meanwhile, gasoline and diesel oil have urban pollution and are replaced by electric automobiles in the future; however, electric vehicles (electric buses and electric buses) have the problems of short endurance mileage, short battery life, high battery replacement cost, difficulty in recycling waste batteries and the like.

LNG is low-temperature liquid of natural gas, has high energy density, low cost and large resource reserve, is a very safe environment-friendly fuel, can replace gasoline and diesel fuel which pollute the environment and have limited resources in the future, and can become a novel environment-friendly fuel for automobiles and steamship equipment in the future. After the LNG is subjected to heat absorption and gasification by the vaporizer, the LNG becomes combustible natural gas which is input into a natural gas engine to perform combustion work and drive a generator to rotate at a high speed to output electric energy.

Meanwhile, the boiling point temperature of the liquid LNG is below minus 162 ℃, latent heat is absorbed by gasification, and sensible heat energy is required when the temperature reaches normal temperature; the equipment such as the electric bus can absorb the energy of the engine and the ambient air, and can also absorb the heat energy in the electric bus in hot summer, thereby realizing the refrigeration of the carriage in the electric bus; by doing so, not only the cost and space for installing the air conditioner are saved, but also a large amount of electric energy consumed by the air conditioning equipment can be saved.

Meanwhile, the technology can also be applied to mobile equipment such as electric refrigerated vehicles, fishing boats and the like; the requirements of mobile equipment such as a refrigerator car, a fishing boat and the like on refrigeration and freezing are met; the electric refrigerator car can guarantee the sufficient endurance mileage, can save the refrigerating capacity requirements of the refrigerator car and other equipment, and meets the environmental protection requirements of future automobiles and other mobile equipment, thereby achieving multiple purposes.

In addition, in terms of fuel cost, the cost of burning natural gas of the automobile is only about half of the cost of burning gasoline and diesel oil under normal conditions; therefore, the natural gas is selected as the automobile fuel, so that the automobile fuel not only meets the requirement on environmental protection in the future, but also is more economical than gasoline and diesel.

Secondly, buses and buses in cities are in working states of frequent starting and frequent deceleration and stopping for a long time, and under the working condition of the traditional engine, the effective thermal efficiency of automobile fuel is less than 20%, and the energy loss of the automobile fuel is as high as about 80% or more.

The electric automobile can just make up for the defect and is very suitable for the working condition state of frequent starting and frequent deceleration stopping, so that the electric automobile technology is adopted and is an energy-saving and environment-friendly choice as a power system of the urban bus. In order to overcome the problem of short endurance mileage of the electric bus, the environment-friendly fuel power generation system is very necessary to be added to the electric bus. After the environment-friendly fuel power generation system and the environment-friendly fuel power generation equipment are added, the capacity of super capacitor energy storage and/or battery energy storage of the electric bus can be reduced, the investment cost of the super capacitor energy storage and/or battery energy storage and the cost of replacing batteries in the future can be obviously reduced; these alone have already covered the added cost of extended range generators (low cost for natural gas).

In terms of energy efficiency, the engine is in a stable full-load working state for a long time and is also in a state of highest fuel combustion efficiency, and the engine can reach more than 35% of effective thermal efficiency; therefore, the energy utilization rate is greatly improved. In addition, for urban buses, the service life of the engine is easy to shorten when the engine is operated under variable working conditions for a long time, the engine is operated at a stable speed for a long time, the efficiency of the engine is highest, and meanwhile, the service life of the engine can be prolonged, so that the effect of achieving multiple purposes is achieved.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive efforts; this is easily done;

FIG. 1 is a schematic diagram of a power generation system or power equipment connection of a gasoline-and compressed natural gas-combustible general-purpose environmental-friendly fuel range-extended electric vehicle according to an embodiment of the present invention;

fig. 2 is a schematic connection diagram of a cryogenic LNG liquid and an eco-fuel electric vehicle drive system or power plant with a vaporizer according to an embodiment of the present invention;

fig. 3 is a schematic connection diagram of a driving system or power plant of an environmentally-friendly fuel electric vehicle with a vaporizer and a refrigeration heat exchanger for cryogenic LNG liquid according to an embodiment of the present invention;

FIG. 4 is a schematic connection diagram of an electric vehicle driving system or power plant with a vaporizer and a refrigeration heat exchanger and other refrigeration environment-friendly fuels provided by an embodiment of the invention;

power generation system part icon:

1-a fuel storage tank; 2-an engine; 3, a generator; 4-a controller; 5-an electric motor; 6-super capacitor and/or battery energy storage system; 7-external power supply charging interface; 101-a control valve; 102-a vaporizer; 103-a second control valve; 104-a second heat exchanger; 105-a third control valve; 106 — a third heat exchanger;

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

In the description of the present invention, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and can be, for example, directly connected, indirectly connected through intervening media, or interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

FIG. 1 is a schematic diagram of a power generation system or power equipment connection of a gasoline-and compressed natural gas-combustible general-purpose environmental-friendly fuel range-extended electric vehicle according to an embodiment of the present invention;

in fig. 1, fuel (such as gasoline, diesel oil, gas, compressed natural gas, etc., which can achieve "one machine for multiple purposes" and is highly applicable and practical) stored in a fuel storage tank 1 is delivered to an engine 2 through a control valve 101 to be combusted and do work; the generator 3 is driven to rotate at a high speed to generate power and output, and the electric motor 5 is driven to rotate and drive the electric bus to run through the regulation and control of the controller 4; in addition, the controller 4 is also provided with a super capacitor energy storage and/or battery energy storage system 6, and the controller 4 drives the motor 5 to rotate;

when the electric bus enters a bus station and stops running, the generator 3 still rotates at a high speed to generate electricity and output (the efficiency can reach more than 35%), and the output electric energy charges the super-capacitor energy storage and/or battery energy storage system 6 through the controller 4.

In addition, when external electric energy exists, the charging pile can be connected to an external power charging interface 7 through the charging pile and the interface, and the external power charging interface is adjusted and controlled through the controller 4; the charging of the supercapacitor energy storage and/or battery energy storage system 6 is carried out so that the electric bus gets an external charge.

Fig. 2 is a schematic connection diagram of a cryogenic LNG liquid and an eco-fuel electric vehicle drive system or power plant with a vaporizer according to an embodiment of the present invention;

in fig. 2, the fuel stored in the fuel storage tank 1 is a low-temperature LNG liquid (the fuel is an LNG liquid, the temperature is minus 162 ℃ below zero, the fuel storage tank 1 is an LNG dewar tank), the low-temperature LNG passes through a control valve 101, and flows through a vaporizer 102 to absorb ambient heat energy to form natural gas, which is delivered to an engine 2 to perform combustion work; the generator 3 is driven to rotate at a high speed to generate power and output, and the electric motor 5 is driven to rotate and drive the electric bus to run through regulation and control of the controller 4; in addition, the controller 4 is also provided with a super capacitor energy storage and/or battery energy storage system 6, and the controller 4 drives the motor 5 to rotate;

when the electric bus enters the bus station and stops running, the generator 3 continues to rotate at a high speed to generate electricity and output (the efficiency can reach more than 35%), and the output electric energy charges the super-capacitor energy storage and/or battery energy storage system 6 through the controller 4.

Fig. 3 is a schematic connection diagram of a driving system or power equipment of an environmentally-friendly fuel electric vehicle with a vaporizer and a refrigeration heat exchanger for cryogenic LNG liquid according to an embodiment of the present invention;

fig. 3 is based on fig. 2, a second control valve 103 and a second heat exchanger 104 are added, the second heat exchanger 104 is arranged inside a compartment and at the top of the compartment of the electric bus, and the fuel stored in the fuel storage tank 1 is LNG liquid (with the temperature below minus 162 ℃). In hot summer, the low-temperature liquid LNG can enter a second heat exchanger 104 arranged on the top of the bus compartment through the control and adjustment of a second control valve 103, so that the heat energy in the electric bus compartment is absorbed, the temperature in the bus compartment is reduced, and the effect of a refrigeration air conditioner is realized. By gasifying the LNG liquid at minus 162 ℃, a large amount of gasification heat and a large amount of temperature rise sensible heat energy from minus 162 ℃ to the environment of 30 ℃ are absorbed, and a large amount of cold energy is released, so that the temperature inside the carriage is reduced.

The heat exchanger 104 is arranged at the top of the electric bus compartment, and the second control valve 103 is closed when refrigeration is not needed. When refrigeration is needed, only the second control valve 103 needs to be opened and the flow is controlled, so as to achieve the purpose of controlling the refrigeration capacity. The second control valve 103 can be set in two series, the first is a stop valve and the second is an electronically regulated throttle valve, so that the temperature inside the vehicle compartment can be regulated in real time through electronic temperature measurement. The technology can be used for products such as refrigerator cars, fishing boats and the like, and has multiple purposes.

FIG. 4 is a schematic connection diagram of an electric vehicle driving system or power plant with a vaporizer and a refrigeration heat exchanger and other refrigeration environment-friendly fuels provided by an embodiment of the invention;

fig. 4 is a view based on fig. 3, with the addition of a third control valve 105 and a second heat exchanger 106, which function to provide cooling for the lubricating oil or the engine or other places where cooling is needed.