61results about How to "Solve the difficulty of starting" patented technology

The invention discloses a fuel battery automobile mixing power system, which comprises the fuel-battery sub-system, the accumulator branch system, the power diode, the bidirectional DC / DC converter, the 24VDC / DC converter and the electric machine controller. The fuel battery connects to the electric machine controller through the power diode linking to the bidirectional DC / DC converter, the accumulator group paralleled connects in front of the electric machine controller, and the input terminals of the bidirectional DC / DC converter paralleling connect the assistant equipment of the fuel battery and the 24VDC / DC converter. At the beginning of the startup of the whole system, the fuel battery system will not start immediately, and the accumulator system provides the power for the system, and when the fuel battery system is started and works normally it provides the power for the whole power system. The invention reduces the power volume of DC / DC converter and the design size, improves the reliability of the operation of the whole power system and the efficiency of the system running.

The invention relates to a wind-magnetism pyrogenic water heater which comprises a vertical shaft-type S-shaped wind turbine and a pyrogenic device, wherein the upper cover and lower cover of the wind turbine are divided into two layers by a layering plate, and each layer is equipped with two semi-cylindrical blades; the openings of the two semi-cylindrical blades of each layer are opposite to form an S shaped, and a part of overlapping area is arranged on a rotating center; a water-storing tank and an accelerator are installed on a pyrogenic device support, and the input end of the accelerator is connected with the transmission shaft of the fan; and an output shaft passes through the bottom of the water-storing tank, a turntable provided with a permanent magnet is installed on the output shaft, and the bottom of the water-storing tank is connected with a heating plate. The water heater provided by the invention has the advantages that the wind energy conversion efficiency is high, the windward area is large, no requirements on the wind direction exists, and the eddy current pyrogenic efficiency of the pyrogenic device is high.

An internal combustion engine is disclosed in which at least one cylinder is adapted to run in homogeneous-charge compression-ignition (HCCI) combustion mode and at least one cylinder is adapted to run in spark-ignition (SI) combustion mode with the HCCI cylinder having a compression ratio at least 2 ratios higher than the SI cylinder. The intakes and exhausts of the HCCI and SI cylinders are separated with a throttle valve disposed in each intake and exhaust aftertreatment devices tailored to each combustion mode disposed in the exhausts.

The invention relates to a large-wind sail vertical rotation type wind power generation tower, and solves the problems of the existing wind driven generator, such as difficult effective matching between wind wheels and a generator and low wind wheel power. The large-wind sail vertical rotation type wind power generation tower comprises impellers composed of an upright shaft and a wind sail blade,and wind control shells arranged outside the impellers. The large-wind sail vertical rotation type wind power generation tower is characterized in that multiple impellers and wind control shells are arranged and are mounted in multiple frames respectively and installed together vertically; the upright shafts of all impellers are connected with each other; and the upright shaft of the downmost impeller is connected with the main shaft of a variable-power generator, thus forming the large-wind sail vertical rotation type wind power generation tower. The invention has the advantages that as the variable-power generator is connected with the upright shafts of the impellers, the problem of difficult effective matching between the generator and the impellers is solved, and the impellers can be matched with the generator under any wind force, thereby reducing dependence on wind and improving the wind wheel power and the generating efficiency.

The invention discloses a gas intake bypass channel of a gas engine, relating to a control device of gas intake flow of the gas engine and aiming at solving the technical problem of difficulty in start of the traditional gas engine. The gas intake bypass channel comprises a controller, a mixer, gas intake pipelines, a gas control valve, an air control valve and a bypass pipeline, wherein the bypass pipeline is communicated with the gas intake pipelines arranged at two ends of the gas control valve, and a bypass valve for controlling gas flow is arranged on the bypass pipeline; the diameter of the bypass valve is less than that of the gas control valve; the rear end of the mixer is connected with a turbocharger; the turbocharger is connected with an air cylinder; one air discharge end of the cylinder is provided with an oxygen sensor; the oxygen sensor is used for detecting the oxygen concentration of the discharged gas and transmitting the oxygen concentration numerical value to a controller; the bypass valve is manually operated; and the gas control valve is controlled by the controller to automatically operate; and the bypass valve is used in the starting process. The gas intake bypass channel can be favorably applicable to real-time changes of the gas concentration and the pressure in the starting process of the engine and solves starting difficulty caused by gas source change.

The invention relates to a motor driving system, in particular to a sine-wave current driving system of a single-winding brushless direct current motor and a control method thereof. The driving system and the control method calculate an input current phase angle instantaneous value and an input current instruction value according to the motor rotation frequency acquired by a position sensor, further sequentially obtain a circuit control voltage item, an instantaneous sensing voltage value and an output voltage instruction value, finally obtain the output duty ratio alpha so as to generate a PWM wave signal, transmits the signal to a full-bridge power inverter circuit so as to control a high-power switch device and accordingly achieves driving control of the single-winding brushless direct current motor. The driving control of the single-winding brushless direct current motor is performed by adopting the driving system and the control method, the motor is easy to start, the manufacture cost is low, vibration and noise are small during motor running, and an application range is wide.

The invention specifically relates to a method for realizing low temperature starting of equipment in a circuit board. The method for realizing low temperature starting of equipment in a circuit board comprises adding a heating circuit near a chip having high requirement for temperature on the circuit board, wherein when the temperature of the circuit board is lower than a specific value and cannot satisfy the starting condition, the heating circuit starts working so that the temperature of the corresponding position of the circuit board starts to rise; when the temperature is greater than the specific value, the heating circuit stops working; when the temperature is lower than the rated value again, the heating circuit starts working again; and then the above process repeats. The method for realizing low temperature starting of equipment in a circuit board is simple in design and is convenient to use, and solves the problem that electronic equipment is difficult to start and is unable to start under lower temperature so that the equipment can start normally under the lower temperature environment and the reliability of electronic products can be improved under the lower temperature environment.

The invention relates to an ignition energy control method for an engine ignition system of a vehicle, which belongs to the field of the control of an internal combustion engine. Because a natural gas engine needs high energy to ignite a combustion mixture inside a combustion chamber, the ignition energy control method adopts a time-sequential repeated ignition tactic under the condition of low rotating speed to control ignition energy by controlling ignition times, time slots among the repeated ignitions and the closing time of a primary ignition coil, thereby effectively solving the problem of the difficult startup of an engine and preventing the engine body remodeling caused by multiple spark plugs. In addition, the invention can alleviate the overmuch ablation of the electrodes of the spark plugs because of the repeated ignitions and can also reduce the waste of energy.

The invention discloses a method for cold starting of a diesel engine. The method includes the steps that starting equipment is used for driving the diesel engine to operate; the oil-control step is conducted, the oil supply quantity of an oil supply system into a cylinder is controlled to be zero, and the diesel engine is made to be in an idling cylinder warming state; the actual operating parameter of the diesel engine is detected; the comparative judgment step is carried out, the actual operating parameter is compared with a preset operating parameter in which the diesel engine can be started normally, and whether the starting condition is achieved or not is judged; if the judging result is negative, the oil-control step will be returned; if the judging result is positive, the oil supply system is controlled to supply oil into the cylinder so that normal starting can be achieved. According to the method for cold starting of the diesel engine, the diesel engine does not need to be adjusted, simpleness and practicability are achieved, cost is low, the phenomena of the imbalance air-fuel mixture ratio and cylinder flooding can not occur in the starting process, and therefore the problem that the diesel engine is hard to start under a low-temperature condition is effectively solved.

The invention relates to a blade of a wind generating set. The blade comprises a blade body and an auxiliary device, wherein the windward face of the blade body is provided with a concave cambered step; the auxiliary device comprises a fixing device, a resetting device and a front edge plate; the fixing device is arranged at a position matched with the concave cambered step of the windward face in the blade body; one end of the resetting device is connected with the fixing device, and the other end of the resetting device is connected with the front edge plate together; and the appearance of the front edge plate is matched with the appearance of the concave cambered step of the windward face. Since the auxiliary device is additionally arranged on the windward face of the blade, the front edge plate extends out when at an interval of low air velocity; and at the time, the sectional lift force of the blade is increased, the torque of an impeller is improved, the starting characteristic of the impeller is improved, and the generating capacity of the wind generating set at the interval of low air velocity is increased. The blade has the advantages of simple principle, convenience in production and manufacturing, obvious use effect, durability, convenience in mounting and suitability for use on the wind generating set. The invention also relates to the wind generating set comprising the blade.

The invention relates to a tissue culture rapid propagation system of European hornbeam, which is characterized by comprising the following process steps of: selecting a stem tip which fully grows and inoculating onto an induction medium after surface sterilization; culturing for 4 weeks and systemically calculating the induction rate; shearing a 1.5-2.0-cm stem segment, inoculating onto a proliferation medium and systemically calculating the proliferation times after 60 days; shearing a 3-4-cm long single seedling which grows strongly, inoculating onto a rooting medium and inducing rooting; culturing for 50 days and systemically calculating the rooting rate, the average root number and the average root length; and when the root length is 3-5 cm, hardening a seedling and transplanting, and investigating the transplanting survival rate of the seedling after 30 days. The tissue culture rapid propagation system has the advantages that a European hornbeam test tube seedling can be induced to quickly proliferate and generate a large amount of adventitious buds, the survival rate is up to 85 percent, and an effective way is provided for industrial seedling culture of the European hornbeam.

The invention relates to a large-wind sail vertical rotation type wind power generation tower, and solves the problems of the existing wind driven generator, such as difficult effective matching between wind wheels and a generator and low wind wheel power. The large-wind sail vertical rotation type wind power generation tower comprises impellers composed of an upright shaft and a wind sail blade,and wind control shells arranged outside the impellers. The large-wind sail vertical rotation type wind power generation tower is characterized in that multiple impellers and wind control shells are arranged and are mounted in multiple frames respectively and installed together vertically; the upright shafts of all impellers are connected with each other; and the upright shaft of the downmost impeller is connected with the main shaft of a variable-power generator, thus forming the large-wind sail vertical rotation type wind power generation tower. The invention has the advantages that as the variable-power generator is connected with the upright shafts of the impellers, the problem of difficult effective matching between the generator and the impellers is solved, and the impellers can be matched with the generator under any wind force, thereby reducing dependence on wind and improving the wind wheel power and the generating efficiency.

The invention discloses a combined combustion chamber used for a piston engine. The combined combustion chamber comprises an air cylinder head, an auxiliary combustion chamber formed in the air cylinder head, and a main combustion chamber formed among the air cylinder head, the auxiliary combustion chamber and a piston. The auxiliary combustion chamber communicates with the main combustion chamberthrough multiple first channels arranged at the bottom of the auxiliary combustion chamber, and the center lines of the first channels are arranged in a bias manner in the radial direction relative to the center line of the auxiliary combustion chamber. High-strength vortexes are forcefully formed and maintained in the auxiliary combustion chamber so that the combustion speed of the engine can beobviously increased, the highest explosion pressure is controlled, the fuel economy is improved, and the requirement for high safety of the aircraft engine is met.

The invention discloses a small intelligent starter of a gasoline engine. The small intelligent starter of the gasoline engine comprises a shaping and amplifying circuit, a delay circuit, a rotating speed detection circuit, a control circuit, an anti-lock circuit and a relay drive circuit; the input end of the shaping and amplifying circuit is connected with outside ignition signals, and the output end is connected with the rotating speed detection circuit; the output end of the rotating speed detection circuit is connected with the delay circuit and control circuit; the control circuit is further connected with the anti-lock circuit and relay drive circuit. The small intelligent starter of the gasoline engine is simple in principle, the problems of difficulty in starting in winter of manual starting and easiness in over-starting of electric starting are solved, the control point can be regulated according to the needs of a client, an engine gear is greatly protected from damage, and the service life of the engine is effectively prolonged. The small intelligent starter of the gasoline engine is small in volume, light in weight, simple in structure, low in cost, high in reliability and broad in application range.

The invention discloses a preparation method of a storable pig manure and straw biogas mixture fermentation raw material. The preparation method comprises the following operation steps: 1) performing deodorization and refreshment treatment on pig manure; 2) stirring and mixing the treated pig manure with dry rice straw and rice bran and then airing, bagging and sealing to obtain the storable pig manure and straw biogas mixture fermentation raw material, wherein weight part proportion of the pig manure to the dry rice straw to the rice bran is (50 to 60):(30 to 40):10. According to the preparation method disclosed by the invention, the pig manure, the rice straw and the rice bran are biogas utilized, so that not only energy is obtained, but also the problem that environmental pollution caused by pig farm manure and rice straw is solved; furthermore, the preparation method disclosed by the invention has the advantages that the biogas fermentation raw material can be longer stored, are convenient to transport, has high gas yield and can generate biogas in a balanced mode; the phenomena of dross and crusting are effectively avoided.

An engine electric heating aid starting method is to design an electric heater for its water tank and fuel tank according to the model of the engine, install and fix the water tank electric heater under the cylinder in the water tank, and install and fix the fuel tank electric heater on the inner bottom shell of the oil tank , the two terminals of the electric heater are respectively connected to the socket with a wire, and the socket has a switch; there is another connection line with a thermostat, and there is a plug at each end, which is used to connect with the socket of the electric heater and the socket. The power socket is connected; the socket of the electric heater is installed and fixed on the vehicle frame. The method of the invention is simple and easy to operate, and the electric heating device can be connected before the vehicle is started, which can quickly increase the body temperature and the temperature of the oil tank, increase the fluidity of the engine oil, and start the motor vehicle in a relatively short period of time, saving time , save trouble, save fuel, and can prolong the life of the engine. After some drivers tried it, the effect is very good, and it can completely solve the problem of difficult starting of the low-temperature engine; this method is especially suitable for agricultural motor vehicles and ordinary trucks.

The invention provides a transmission system. T he transmission system comprises a main shaft and an auxiliary shaft; the main shaft and the auxiliary shaft are sleeved with a first gear and a secondgear in a non-contact manner; wherein the main shaft is connected with a first joint mechanism, the first joint mechanism is used for enabling the first gear and the main shaft to be synchronous or disconnected, the auxiliary shaft is connected with a second joint mechanism, the second joint mechanism is used for enabling the second gear and the auxiliary shaft to be synchronous or disconnected, and the first gear is connected with the second gear. According to the invention, the first gear is connected with the second gear. Therefore, the first joint mechanism and the second joint mechanism can jointly act to control the transmission system. Compared with a traditional transmission system with one joint mechanism controlling one gear, the transmission of the transmission system provided by the invention can be controlled through simultaneous action of the two mechanisms, and the simple arrangement mode provides possibility for expanding the speed ratio and the gear number of the transmission system. The invention further provides a gear shifting method.

The invention discloses an engine starting control method for a hybrid all-terrain vehicle. The problems that an existing range extender is difficult to start at low temperature and unsmooth to startat normal temperature are solved. The engine starting control method is characterized in that an engine torque output rule is formulated according to the starting resistance characteristics of an engine at different temperatures; the starting process comprises a torque increasing process and a torque reduction process; in the torque increasing process, the initial starting torque is equal to the minimum torque, the starting torque is controlled to be equal to the sum of the starting torque at the previous moment and the torque increasing step length, and the starting torque is controlled to beequal to the maximum torque until the starting torque is increased to be larger than or equal to the maximum torque; in the torque reduction process, if the rotating speed of the engine is greater than the starting rotating speed, the torque reduction process is entered, and the starting torque is equal to the difference of the starting torque at the previous moment minus the torque reduction step length; if the output torque is smaller than the minimum torque, the starting torque is controlled to be equal to the idling torque; and if the rotating speed of the engine is smaller than the maintaining rotating speed and a starting switch of the all-terrain vehicle is in an effective on state, the engine is controlled to return to the torque increasing process, and the torque is continuouslyincreased to guarantee that the rotating speed is larger than the maintaining rotating speed.

The double-piston DC scavenging engine is characterized by that in same cylinder interior it contains two opposed pistons which can be reciprocated, a crankshaft connected with two opposed pistons, agroup of two piston rods, a group of two pitman rockerarms, a group of two connecting rods mounted on a crankshaft, two groups of eccentric shaft main shafts and eccentric shaft rockerarms which are completely and symmetrically arranged and two groups of wormwheels and worms which are symmetrically arranged and connected with a controllable motor. Said engine can be made up by using ceramic material, and can use various alcohol fuels and vegetable oil fuels, also can use regenerated clean fuel.

The invention discloses a method for quickly achieving nitrite accumulation in a municipal domestic sewage heterotrophic nitrification process. According to the method, municipal domestic sewage is directly utilized to domesticate ordinary active sludge, an SBR reactor is utilized, sludge age and hydraulic retention time are respectively set as 3 to 4 d and 6 to 12 h, and operation is performed four periods everyday; furthermore, in each operation period, anaerobic stage time to aerobic stage time to sedimentation stage time is equal to 3 to 8 to 1; sewage feeding and sewage drainage are respectively finished at the initial anaerobic period and the last sedimentation period; the dissolved oxygen concentration in the aerobic stage is controlled as 2mg.L<-1> or more. In addition, the sewagedischarge ratio of the SBR reactor is set as 0.25 to 0.75, an operation temperature is controlled as 18 + / -2 DEG C, and a pH of reaction mixed liquid is controlled as 7 to 9. After domestication for 15 to 30 d, the maximum nitrite accumulation rate can reach 93.5%.

The invention belongs to a helicopter design technology, and particularly relates to a helicopter engine starting device and method in a plateau environment. According to the helicopter engine starting method in the plateau environment, an auxiliary power device is selected to generate power to provide starting energy for a helicopter engine, when the engine is started, an electronic controller ofthe auxiliary power device is triggered at the same time, the electronic controller of the auxiliary power device instantly outputs larger current to a fuel servo control device, the fuel servo control device is controlled to compensate fuel flow to the auxiliary power device, and rotation speed fluctuation is reduced. According to the helicopter engine starting device and method in the plateau environment, a helicopter engine starting technology is optimized, an improved scheme of a helicopter engine starting energy source is provided, the operation is simple and convenient, the implementation is convenient, the electric power input capability and the regulation performance of the engine starting are improved through the use verification of plateau and low-temperature environments, the function and the performance are reliable, and the technical problem of difficult helicopter engine starting in plateau, high and low-temperature environments in the prior art is solved.

The invention discloses an automatic heating and heat preservation device of electric car range extender diesel engine oil conveying pipes. The device comprises a tee joint, an electric heating pipe,a first oil conveying pipe, a second oil conveying pipe, an oil collection box, a gas conveying pipe, a three-position three-way electromagnetic reversing valve, a temperature sensor, an exhaust fan and a control panel; the control panel is an ECU intelligent circuit control system, the oil tank is connected with the first oil conveying pipe and the second oil conveying pipe through two oil outlets of the tee joint via the oil pump, the oil conveying pipes are connected with two oil inlets of the three-position three-way electromagnetic reversing valve, the control panel is connected with theelectric heating pipe, the electromagnetic valve, the three-position three-way electromagnetic reversing valve and the exhaust fan through a wire and a data signal line, the control panel controls a diesel engine to generate electricity according to the SOC of a power battery, the electric heating pipe is controlled to heat the first oil conveying pipe, the exhaust fan is controlled to carry out hot air exhaust work according to the reverse hysteresis output characteristic schmitt trigger control principle, fuel in the oil collection box and the second oil conveying pipe is heated, flowing andcombustion of diesel oil are improved, the fuel oil conversion efficiency is improved, energy is saved, and the fuel oil cost is reduced.

The invention discloses a fuel heating system and an engine system, relates to the field of starting of engines, and mainly aims to enable an engine of the engine system to be quickly started at a low temperature through the fuel heating system. The fuel heating system is characterized by comprising a heating device and a fuel injecting nozzle. The heating device includes a shell and a heating element; a fluid inlet and a fluid outlet are formed in the shell; a flowing hole for communicating the fluid inlet with the fluid outlet is formed in the shell; at least one part of the heating element is positioned in the flowing hole for heating a fluid flowing through the flowing hole; the fluid inlet includes an air inlet and a fuel inlet; and a fuel outlet end of the fuel injecting nozzle is connected with a fuel inlet end of the heating device, so that a fuel outlet of the fuel injecting nozzle is communicated with a fuel inlet of the heating device. The engine system is suitable for power devices provided with engines, such as various vehicles, generator units or ships and the like.

The invention discloses a starting device for an enriching-valve type carburetor, comprising an enriching valve which is arranged on the enriching-valve type carburetor. A control valve is arranged on the enriching valve; a starting plunger and an oil needle are arranged on the control valve and are respectively inserted in a plunger cavity of the enriching valve and an enriching oil supplying channel; the starting plunger and the oil needle can move along the axis of the plunger cavity of the enriching valve and the enriching oil supplying channel; and a gas inlet and an mixed gas outlet are arranged on the plunger cavity of the enriching valve, wherein the gas inlet is directly communicated with the air through a channel except an engine gas inlet system, With the design, the starting device can start the motorcycle in the high-temperature environment, thereby effectively solving the problem that the motorcycle is difficult to start in the high-temperature environment. The starting device can be matched with the system without being affected in the starting performance in the high-temperature environment, and the starting device can be widely applied to the enriching-valve type carburetor.

The invention discloses an ethanol fuel cold start aiding method, comprising the steps of I, judging, by an engine control unit, whether an engine start signal is received; II, if yes, acquiring, by the engine control unit, water temperature, intake temperature and ethanol concentration in ethanol fuel, and calculating a target fuel temperature required for engine start according to the water temperature, the intake temperature and the ethanol concentration; III, acquiring real-time temperature of the ethanol fuel, and judging, by the engine control unit, whether heating is required accordingto a target fuel temperature and the current real-time temperature of the ethanol fuel; if yes, sending, by the engine control unit, to a control signal to a heating device; heating the ethanol fuel to the target fuel temperature through the heating device. The ethanol fuel cold start aiding method has the advantages that better atomization of the ethanol fuel is achieved through an electric heating system to provide improved burning effect, the cold start difficulty is finally solved, and environmental pollution by cold engine emission is reduced.

The invention discloses an engine starting control method used by a flexible fuel vehicle. After an engine starting command is received, if the ethanol content in fuel is higher than a set content, an air inlet bypass valve is firstly controlled by a stepping motor to be closed to the minimum position opening degree; and after a starter drives an engine to start to work, drives an oil sprayer to start to spray oil and drives an ignition plug to start to ignite, the air inlet bypass valve is controlled by the stepping motor to be opened to the starting target opening degree. By means of the engine starting control method used by the flexible fuel vehicle, sufficient combustible mixed gas can be formed, and reliable starting of the engine is achieved.

The invention relates to a multifunctional engine starter which is used for solving the problem that the existing multicylinder engine is difficult to start in winter, and reducing the cost of a battery starter and relieving and decreasing faults in everyday use. The engine starter comprises a convex pneumatic cylinder, a pneumatic cylinder gland, an admission-exhaust pipe joint, an umbrella-shaped gas mandril spring seat, a pneumatic cylinder piston and an air plug fixed-connection mechanism of an umbrella-shaped gas mandril, which are assembled from outside to inside. The engine starter is compact in structure, small in volume, low in cost, reliable in performance, time-saving and labor-saving.

The invention discloses an auxiliary starting control method and system. The method comprises steps as follows: the position of a clutch switch is adjusted in advance, so that the clutch switch sends a clutch switch signal to an electronic control unit when a clutch pedal is in a calibrated position, namely, the calibrated position 5%-30% of the largest displacement of the clutch pedal. By comparison with a traditional calibrated position, namely, the position 90% of the largest displacement of the clutch pedal, a driver steps on the clutch pedal until the clutch pedal is moved by 5%-30%, a clutch switch circuit is connected with the signal, so that an ECU (electric control unit) starts a control state in advance and can respond to the starting process correctly in advance; when a vehicle is stopped and the electronic control unit receives the clutch switch signal, the vehicle is regarded as in a starting stage, a first increment is increased for a target idle speed, an engine is under idle speed control at an adjusted target idle speed, and the problem that a small-displacement engine is difficult to start is effectively solved.

The invention discloses a motorcycle fuel supply system with a low fuel tank. The motorcycle fuel supply system with the low fuel tank comprises a fuel tank, an engine, an air filter, a carburetor and a negative pressure valve. The fuel tank is connected with the negative pressure valve through a fuel outlet pipe of the fuel tank and is lower than the carburetor. The negative pressure valve is connected with the carburetor through a fuel intake pipe of the carburetor. The negative pressure valve is connected with an air intake pipe of the engine through a negative pressure pipe. An auxiliary fuel tank is disposed on the fuel intake pipe of the carburetor and is connected with the fuel tank through a fuel return pipe of the auxiliary fuel tank. The auxiliary fuel tank is higher than the carburetor. When negative pressure in the negative pressure valve is insufficient during startup of the engine, the auxiliary fuel tank can supply sufficient fuel to the carburetor to guarantee fast and normal startup of the engine. Therefore, the problem that the engine of the motorcycle with the low fuel tank is difficult to start or fails to start is solved effectively. Additionally, a filling hole for primary use fuel is arranged at the top of the auxiliary fuel tank, so that fast startup of the engine in first use can be guaranteed.