86results about How to "Reduced dynamics" patented technology

The invention provides a light field imaging and printing device and a micro lens thin film with three-dimensional floating images, wherein the thin film is prepared by the light field imaging and printing device. The scanning operation on a lens surface is conducted by a scanning galvanometer system, and four-dimensional light field data can be printed in combination with the variation of space three-dimensional coordinates. The light field imaging and printing device comprises a light source, a scanning galvanometer system, a lens, a diffuser, a converging lens assembly and a micro lens recording material. Light rays sequentially pass through the scanning galvanometer system, the lens, the diffuser and the converging lens assembly, and then instantaneous and dynamic focus spots are outputted. In this way, a volumetric-pixel type radiation light field is obtained. After that, the information of the instantaneous volumetric-pixel type radiation light field is recorded by the micro lens recording material. By means of the device and the thin film, more realistic three-dimensional dynamic images can be formed. Through controlling different variable values, floating images of multiple different characteristics are formed. Therefore, the multi-view imaging effect of varying images can be realized.

The invention discloses a four-die stepless speed change series-parallel hybrid power driving system, belonging to the technical field of automobile hybrid driving. The system comprises an engine, a clutch, two motors, corresponding transmission chains of the two motors, a power transfer switching device, a planetary gear differential device, a deceleration differential device, an energy storage device and a motor control device. The system provided by the invention has the characteristics of better technical inheritance with existing vehicles, overall dynamic property, fuel economy and low emission, and has functions of four-die driving, stepless speed change and series-parallel system; the problems of insufficient driving power, lack in ramp starting ability, large system volume and high cost of the existing similar technologies and the problems that the stepless speed regulation of the engine cannot be realized and the batch industrialization is difficult as the electromechanical components are difficult to manufacture are solved, and organic combination of high performance, low development cost, low system cost and easy implementation of scale industrialization is realized.

The invention discloses a combustion mode control system of a gasoline premixing and diesel igniting engine and a control policy thereof. After an electronic control unit acquires the cooling water temperature, the air inlet temperature, the air flow, the engine crankshaft rotating speed and the accelerator pedal position information to judge the operating conditions of the engine, action commands are sent to a gasoline injector and a diesel injector to control the combustion mode of the engine; the operation steps are as follows: (a) the automobile operation state is judged; and the corresponding engine combustion mode is selected; (b) the engine load state is judged, and the corresponding engine combustion mode is selected; and (c) when the engine is positioned in the working condition of medium load, the engine combustion mode is selected. The dynamic performance and the economic performance of automobiles are guaranteed; and the nitric oxide and PM discharge indexes are reduced.

The invention relates to the technical field of railway maintenance, in particular to a method of polishing steel rails in a switch area. The method includes: acquiring in situ outline data of a first stock rail and outline data of an integrated rail formed by abutting a point rail to a second stock rail; through the outline data acquired in situ, according to a wheel-rail contact geometrical algorithm, calculating the positions of wheel-rail contact points of the first stock rail and the integrated rail; according to the position of the wheel-rail contact point of the integrated rail, based on a rail central line between the first stock rail and the integrated rail, polishing the outline of the first stock rail so that the wheel-rail contact point of the first stock rail and that of the integrated rail, in symmetry about the rail central line. The method has the advantages that the amplitude of S-swing of a locomotive is effectively reduced, the wheel-rail power action is relieved, the quality of a train passing the switch is improved, wear of the point rail is reduced, and the service life of a railway is prolonged.

The invention provides a bogie of a railway vehicle and the railway vehicle. The bogie of the railway vehicle comprises two sets of wheel pairs, load bearing saddles arranged on the rotation shafts of the wheel pairs, and side frames arranged on two load bearing saddles at the same side. Elastic pads are arranged between the load bearing saddles and the side frames. The elastic pads are distributed around the upper surface and the side surface of the load bearing saddles. The bogie with the elastic pad structure having certain angle and large deflection can significantly enhance the curve negotiation performance of the bogie, reduce the abrasion of the wheel, realize the low driving power effect of the wheel track, and reduce the damage to the route.

The invention provides a multi-purpose adaptive second-gear multimode stepless speed changing electric transmission integrated power system. The multi-purpose adaptive second-gear multimode stepless speed changing electric transmission integrated power system comprises a first motor and the like; a planetary gear train comprises a gear ring, a planet carrier and a sun gear; the rotor of the first motor is connected with the gear ring of the planetary gear train; the rotor of the second motor is connected with the sun gear of the planetary gear train and the input end of a transmission chain, respectively; a gear shifting device is connected with the input end of a speed reducing differential mechanism and control on power transfer from the planet carrier of the planetary gear train and the output end of the transmission chain to the speed reducing differential mechanism is realized; the output end of the speed reducing differential mechanism is connected with two wheels by use of two half shafts; a motor control device is connected with an energy storage device to transfer electric energy; the motor control device is further connected with the first motor and the second motor, respectively, and outputs control instructions. The multi-purpose adaptive second-gear multimode stepless speed changing electric transmission integrated power system has the characteristics of better technical inheritance to the existing vehicles, whole vehicle dynamic property, fuel economy and low emission.

The invention relates to an energy-saving and environment-friendly vehicle methanol gasoline and a preparation method thereof, belonging to the technical field of alternative energy sources. The vehicle methanol gasoline is prepared by the following materials by weight percentage: 30-88.5% of white gasoline component oil, 10-55% of methanol and 1.5-15% of composite additive; the composite additive is composed of the following components: 60-77.5% of latent solvent, 17-30% of heat value enriching substance, 0.08-1.3% of power synergistic agent, 3.5-10% of homogeneous catalysis combustion improver, 0.6-3.0% of corrosion and swelling inhibitor and 1.5-3.5% of vapor pressure regulator, after being evenly mixed, the materials are added into 10-55% of methanol, after being slightly stirred, the mixture is filled in 30-85.5% of white gasoline, evenly stirred and is subject to static reaction for 4-8 hours. The methanol gasoline can effectively solve the technical difficult problems of power reduction, high gasoline consumption, corrosiveness, swelling, difficult cold start, high-temperature air resistance, and the like, when the content of methanol gasoline is 10-55%; the vehicle methanol gasoline can be directly used on automobiles, while engines do not need to be modified; the vehicle methanol gasoline can also be mixed or interchanged with white gasoline and ethanol gasoline for application. The invention has the advantages of easily available raw materials, low cost, simple preparation technique and significant energy-saving benefit, and can greatly reduce tail gas pollutant emission.

The invention discloses a working mode control method of a hybrid power vehicle. The method comprises the steps that usable driving power of a driving motor under a serial driving mode after the vehicle is started is obtained; whether or not a driver driving demanding power is met is judged according to the usable driving power of the driving motor; whether or not the engine can be allowed to enter an efficient area by the driver driving demanding power at a current driving speed when the engine is directly driven is judged; whether or not the demand in which the power of a whole vehicle is not reduced is met by the direct driving power of the engine at the current driving speed is judged; a working mode of the vehicle is switched to be a parallel driving mode. According to the method, theswitching timing of the working mode of the vehicle is decided to ensure that the power of the whole vehicle is not consumed and ensure the economical performance of the whole vehicle. The inventionfurther provides a working mode control device of the hybrid power vehicle and the hybrid power vehicle.

The invention provides a dual-source battery pack, a management method and system and an electric vehicle. The dual-source battery pack comprises a main battery pack bin which comprises a main batterypack and a control unit and is fixed in the electric vehicle and an auxiliary battery pack bin which comprises an auxiliary battery pack and is detachably installed in the electric vehicle. The firstend and the second end of the DC / DC converter are connected to the total positive end and the total negative end of the auxiliary battery pack, the third end is connected with the total positive endand the total positive output end of the main battery pack, the fourth end is connected with the total negative end and the total negative output end of the main battery pack, and a charging and discharging path of the main battery pack and the auxiliary battery pack is formed. The control unit realizes charge and discharge control of the auxiliary battery pack by controlling the DC / DC converter.The battery cell standard of the main battery pack and the battery cell standard of the auxiliary battery pack are different. The dual-source battery pack reduces performance requirements of the auxiliary battery pack while guaranteeing the power and economy of the whole vehicle, and saves the cost compared with an original battery set by 10-30%.

The invention provides a rubber tube rolling shock insulation support for shock insulation of a building structure foundation. The rubber tube rolling shock insulation support comprises a limiting seat, a ball limiting rack, multiple balls, multiple rubber tubes, a concrete column-column foot lining plate and a limiting stay rope. An upper-portion structure can produce a certain amplitude of horizontal displacement with respect to the shock insulation support fixed to the foundation through matching of the limiting seat, the rubber tubes, the balls and the ball limiting rack when horizontal shock occurs, the power effect of shock on the upper-portion structure is reduced, deformation of a shock insulation layer during earthquake can be limited, the support has a certain reset capability, the limiting stay rope can ensure that the upper-portion structure and the foundation do not produce overlarge displacement, the shock resistance capability of the structure is improved, and the shock resistance demand is met.

The invention particularly discloses a radial welding bogie with a low dynamic effect. The radial welding bogie comprises a welding framework, a braking device, a wheel set and a wheel set connecting device, wherein the wheel set is connected with the wheel set connecting device; the weld framework is arranged above the wheel set connecting device; and the braking device is connected with the welding framework together. The welding framework comprises two side beams, a cross beam, a braking boom and two vibration damping devices, wherein the cross beam is arranged between the two side beams; a vibration damping tray is arranged below the cross beam; and the braking boom is arranged at the two sides of the cross beam. Due to the adoption of the framework of a welding structure, the overall weight of the bogie is lightened; due to the fact that the effective connection is realized through the braking boom between the two side beams of the bogie, the overall anti-warp stiffness of the bogie is greatly improved, and the critical speed of the bogie is improved; and the low dynamic effect of the bogie is realized by elastic bearing saddles adopted by the bogie, so that the acting force between wheel-rails is reduced.

The invention relates to a carbinol group clean fuel concoction accessory ingredient, a preparation method of the carbinol group clean fuel concoction accessory ingredient and a purpose of the carbinol group clean fuel concoction accessory ingredient. The carbinol group clean fuel concoction accessory ingredient is composed of hydrotropy adjuvant, denaturation improving agent, antioxidant anti-glue agent, synergism complexing agent and combustion improver. The increase of octane value of methanol gasoline which is tempered by the carbinol group clean fuel concoction accessory ingredient is stable. A direct ratio relation exists between additive amount and octane value. Combustion stability of fuel is strengthened, and efficiency of transferring chemical energy into kinetic energy is improved. The carbinol group clean fuel concoction accessory ingredient is good in storage stability and is not prone to causing oxidative deterioration when stored for a long time. Compared with existing gasoline 93 motor gasoline, motor plateau type clean methanol gasoline which is tempered by the carbinol group clean fuel concoction accessory ingredient has the advantages of improving power, reducing emission and reducing environment pollution in high altitude anoxia areas.

The invention discloses a low-power-action high-speed magnetic levitation vehicle suspension frame device. The device comprises a middle cross beam frame unit with a secondary suspension system, and the two sides of the two ends of the cross beam frame unit are both provided with a longitudinal beam; suspension frame units are mounted at the ends of the longitudinal beams. The suspension frame device omits a half-suspension-frame design mode of an existing magnetic levitation vehicle suspension frame, that is, the structure in which a middle longitudinal beam is used for connecting a front half suspension frame with a rear half suspension frame is not used, instead, only one middle cross beam frame unit is used; the suspension frame units are fixed on the two sides of the beam frame unit by means of the four longitudinal beams. By means of the unique suspension frame structure design, certain movement decoupling can be achieved, and the adaptability of a suspension frame to a line is enhanced; in addition, the power effect between the suspension frame device and the line can be effectively reduced by means of the middle secondary suspension, vehicle rail coupling vibration is inhibited, and the suspension stability is improved.

The invention relates to a speed filter for an internal combustion engine. Said filter contains a calculation rule (BV(i)), which is used to completely or partially eliminate a speed oscillation of the i-th order, thus improving the dynamics and the robustness of the speed control loop.

The invention discloses a middle-speed magnetic levitation vehicle walking mechanism with six suspension modules. On the basis of an existing middle-speed magnetic levitation vehicle walking mechanismwith five suspension modules, another suspension module is added, and therefore the running speed of a maglev train can be increased to a high and middle speed range. The maximum applicable speed ofthe walking mechanism is not lower than 180 km / h, and the application market of current middle-low speed maglev trains is expanded. Each suspended rack adopts a pair of bag-type large air springs distributed on the left and right sides of the middle part of the suspended rack, the dynamic effect between the suspended racks and a circuit is small, the coupling vibration of train tracks can be remarkably reduced, and the suspension stability of the maglev trains is improved. Optimal design is conducted on power units, suspension units and the suspended racks of the suspension modules, the walking mechanism is simplified, and more convenience is provided for daily use and maintenance.

The invention discloses a special diesel engine smoke intensity control system, which comprises a parameter acquisition module, a fuel injection quantity calculation module and a fuel injector. The fuel injection quantity calculation module is used for obtaining a basic fuel injection quantity of a current calculation period according to engine operation parameters; when the smoke intensity control mode is not entered, the basic fuel injection quantity of the current calculation period is directly used as the smoke intensity control fuel quantity of the current calculation period; when the smoke intensity control mode is started, the smoke intensity control oil quantity of the current calculation period is the maximum value of the basic oil injection quantity and the smoke intensity control quit oil quantity of the current calculation period, andthe minimum value of the smoke intensity control oil quantity of the current calculation period and the oil quantity of other control modes are taken to obtain the final oil injection quantity of the current calculation period. The invention further discloses a control method of the special diesel engine smoke intensity control system, and the smoke intensity is controlled by controlling the fuel injection quantity. The smoke intensity is effectively reduced, and meanwhile the situation that the smoke intensity is in a smoke intensity control mode for a long time and influences power performance is avoided.

The invention discloses a multi-dimensional damping control device for a pile foundation. The multi-dimensional damping control device comprises an anti-settling wedge-shaped pile head for increasing the shearing force of the pile foundation, and basic damping control devices arranged in a cylindrical cavity of the wedge-shaped pile head. The wedge-shaped pile head provides work space for the basic damping control devices. Each basic damping control device comprises a cavity defined by a top plate, side plates and a bottom plate, wherein an opening is formed in the top plate, the bottom plate is fixedly connected to the wedge-shaped pile head, a damping box capable of sliding horizontally is arranged in the cavity, a rubber support is arranged on the top of the damping box, the upper end of the rubber support is connected with a bearing plate, and the side plates are provided with spring damping elements connected with the damping box.

The invention relates to a cargo ship and specifically relates to an electric propelled inland river cargo ship. The invention solves the problems of poor power property, inferior energy-saving and environment-friendly property, high noise and vibration, poor running economical efficiency and poor operation flexibility of the present inland river cargo ship. The electric propelled inland river cargo ship comprises a generating system, a power distribution system, a main propelling system and an auxiliary system, wherein the generating system comprises a plurality of constant-speed generator sets; the power distribution system comprises a main power distribution plate, an auxiliary power distribution plate, a main transformer, an auxiliary transformer, a plurality of refrigerated container transformers, an AC690V bus bar mounted on the main power distribution plate, an AC400V bus bar mounted on the auxiliary power distribution plate and an AC220V bus bar mounted on the auxiliary power distribution plate; and the main propelling system comprises two propelling frequency converters, two propelling motors, two gear boxes and two full-rotation propellers. The electric propelled inland river cargo ship is suitable for inland river transportation.

The invention relates to a novel super-energy-saving gas turbine; the novel super-energy-saving gas turbine can be used for eliminating heat resistance dependence and limitation of a traditional gas turbine and a traditional ultra supercritical turbine to a boiler material and a pipeline material, and can be freely used under ultra high-temperature power steam at about 2000 DEG C; the novel super-energy-saving gas turbine is mainly characterized in that a steam cylinder is derived by utilizing that a fuel combustion chamber and a nozzle part of a spray channel of the combustion chamber are required to be cooled greatly, utilizing a large amount of heat energy generated after fuel combustion, and utilizing the characteristic that ultra supercritical steam has the huge dynamic property and water-saving property on the basis of the traditional gas turbine, and therefore, power generated by two kinds of cylinders can work simultaneously; in particular, the derived steam cylinder unexpectedly can generate particularly huge steam power, which is 60-100 times of that generated by the traditional gas turbine theoretically and is 10 times higher than existing ultra supercritical steam, and thus, compared with all the traditional gas turbines, the novel super-energy-saving gas turbine disclosed by the invention thoroughly realizes large-amplitude large-scale energy-saving power-saving lift.

The invention discloses an axle box cross connection type express freight car bogie. The bogie comprises an axle assembly, a framework, axle box suspension devices, a swing bolster, a foundation brakedevice, side bearings, an empty and load adjusting device and a central suspension device, the axle box suspension devices are installed at the two ends of the axle assembly respectively, the framework is located above the four axle box suspension devices, and the four axle box suspension devices are connected in a crossed mode through a crossed connection device; the cross connection device comprises two pull rods which are located below the swing bolster and arranged in a cross mode, and the two tail ends of each pull rod are hinged to an axle box suspension device of the bogie through elastic spherical hinges respectively. Constraint of the front wheel set and the rear wheel set is enhanced; the shearing rigidity between the wheel sets is increased, the snaking instability critical speed of the bogie is greatly increased, the axle box cross connection device can be suspended by adopting an axle box with soft rigidity, the operation stability is ensured, the head shaking constraintof the wheel sets can be released, the wheel rail acting force, wheel rail abrasion and operation noise are reduced, and the overall dynamic performance of the vehicle is improved.

The invention discloses a mechanical synchronous transmission, which mainly comprises a box body, an input shaft, an output shaft, a middle shaft, a gear pair, a synchronizer and a release bearing operating mechanism. The gear pair comprises a first-shift gear pair, a second-shift gear pair, a third-shift gear pair, a fourth-shift gear pair, a fifth-shift gear pair, a reverse gear pair and a box body; and the middle shaft and the output shaft are additionally provided with sixth-shift gear pairs. The mechanical synchronous transmission increases the sixth-shift gears with less transmission ratio; the transmission is matched with an engine to reduce the oil consumption of an integral vehicle so that the integral vehicle achieves the requirements of national discharge and oil consumption; and the mechanical synchronous transmission has reasonable transmission ratio, enough strength and reliability, and higher transmission efficiency and gear shifting comfort, and becomes the development tendency of future manual transmissions.

The invention discloses a motorcycle fuel evaporation system and a motorcycle thereof. The system comprises a fuel evaporation pipe, a carbon tank and a fuel tank lock body, wherein the fuel tank lock body is provided with a gas path; one end of the gas path is communicated with the fuel tank, and the other end is communicated with the fuel evaporation pipe and is sealed with the outside; the fuel evaporation pipe is connected between the carbon tank and the gas path; and the port of the fuel evaporation pipe is positioned on the position out of the engine fuel tank and is communicated with the gas path in the fuel tank lock body. Fuel steam can smoothly enter and exit via the gas path, and liquid is blocked because the port of the fuel evaporation pipe is positioned out of the fuel tank.When the motorcycle fuel evaporation system is applied to the motorcycle, fuel can be prevented from splashing or infiltrating into the fuel evaporation pipe so as to prevent the fuel evaporation pipe from being blocked, thereby guaranteeing balanced pressure in the fuel tank, bringing convenience for lowering emission and fuel consumption, prolonging the service life of the carbon tank and guaranteeing the dynamic performance and the use performance of the whole motorcycle. A gas and fuel separator, a dumping valve and other components are omitted, which lowers cost and makes the structural arrangement of the whole motorcycle simpler.

A gaze tracking system, leaving a low power mode in response to an activation signal, captures an initial burst of eye pictures in short time by restricting the image area of a sensor, with the purpose of enabling an increased frame rate. Subsequent eye pictures are captured at normal frame rate. The first gaze point value is computed memorylessly based on the initial burst of eye pictures and no additional imagery, while subsequent values may be computed recursively by taking into account previous gaze point values or information from previous eye pictures. The restriction of the image area may be guided by a preliminary overview picture captured using the same or a different sensor. From the gaze point values, the system may derive a control signal to be supplied to a computer device with a visual display.

The invention provides a method for controlling a vehicle accelerator slope. The method comprises the steps that it is determined that a common working range of the vehicle accelerator opening degreeis larger than or equal to lambda 1 and smaller than or equal to lambda 2; when the accelerator opening degree is in the common working range, an initial value of the accelerator slope k2 is set, whenthe accelerator opening degree is equal to lambda 1, the pedal travel is delta 3, and when the accelerator opening degree is equal to lambda 2, the pedal travel is delta 4; when the accelerator opening degree is smaller than lambda 1, the accelerator slope is set to be k1, and when the accelerator opening degree is larger than lambda 2, the accelerator slope is set to be k3; a critical value of the accelerator slope is set to be kx; the numerical value of k2 is reduced, and when k2 is smaller than or equal to the critical value kx, the numerical value of k2 is no longer changed, and k2 is equal to kx; under the condition that k2 is larger than the critical value kx, engine torque average fluctuation amount delta T in a certain period is collected in real time when the accelerator openingdegree is in the common working range, and a critical value of the engine torque average fluctuation amount is set to be Tx; and when delta T is smaller than or equal to Tx, the numerical value of k2is not adjusted any more.

The invention relates automotive plateau-type modified fuel methanol and a production method and purposes of the automotive plateau-type modified fuel methanol. The automotive plateau-type modified fuel methanol is composed of methanol-based clean fuel blending additives and automotive fuel methanol. When methanol gasoline blended with the plateau-type modified fuel methanol is used, the increase of octane value is stable, a direct ratio relationship exists between additive amount and the octane value, the combustion stability of the fuel is strengthened, the efficiency of converting chemical energy into kinetic energy is improved, the storage stability is good, and the methanol gasoline is not oxidized and deteriorates after long-time storage. Compared with existing 93# automotive gasoline, the methanol gasoline blended with the plateau-type modified fuel methanol has the advantages of improving power, lowering emission, and reducing environmental pollution when used in plateaus and anoxic areas.

The invention relates to an efficient composite energy storage system for vehicles, which comprises a super capacitor, a super capacitor management system, a power battery, a power battery management system, a one-way DC / DC converter, a power diode, a power dissipation device, a power switch and an energy storage system controller, wherein the super capacitor management system is used for controlling operation of the super capacitor, and the power battery management system is used for controlling operation of the power battery. The one-way DC / DC converter is in parallel connection with the power diode, an anode of the power diode is connected with an output end of the one-way DC / DC converter, a cathode of the power diode is connected with an input end of the one-way DC / DC converter, the anode of the power diode is further connected with an anode of the power battery, and the cathode of the power diode is further connected with an anode of the super capacitor. A cathode of the power battery, a cathode of the super capacitor and the one-way DC / DC converter are in common ground, and the power switch and the power dissipation device which are in serial connection are further connected between the anode and the cathode of the super capacitor. The power battery management system, the super capacitor management system, the power switch and the one-way DC / DC converter are coordinately controlled by the energy storage system controller. The efficient composite energy storage system is widely applicable to energy storage systems of new energy vehicles.

The present invention provides compounds useful as surfactants having formula (1), including isomers thereof: wherein a and b are integers independently selected from about 3 to about 6; x is an integer from about 1 to about 12; (m+n) is from about 1 to about 4; the R1 groups are independently selected from the group consisting of linear, cyclic, and branched alkyl, alkenyl, aryl, and alkylaryl groups having from about C3 to about C30 atoms; and when (m+n) is equal to or greater than 2, each R1 may be independently R2 or R3, wherein R2 and R3 are independently selected from the group consisting of linear, cyclic, and branched alkyl, alkenyl, aryl, and alkylaryl groups having from about C3 to about C30 atoms. The invention also provides a method for reducing surface tension in a waterborne composition or an industrial process by the incorporation of a surfactant having formula (1) and an aqueous composition comprising a surfactant having formula (1). The invention further provides a product prepared by the reaction of a N,N′-bis(polyhydroxyalkyl)alkylenediamine with a glycidyl ether.

The embodiment of the invention relates to the field of vehicle suspensions, and discloses a rear independent suspension system and a vehicle, and the rear independent suspension system comprises an upper control arm assembly, a lower control arm assembly, a sliding column assembly, a steering knuckle and a toe-in connecting rod assembly. According to the rear independent suspension system, a rear transverse stabilizer bar and auxiliary parts of the rear transverse stabilizer bar can be omitted, and the vehicle weight, the fuel economy and the vehicle dynamic property are reduced.

The invention provides a dual-source battery pack and an electric vehicle. The dual-source battery pack comprises a battery pack bin and a main battery pack, an auxiliary battery pack, a DC / DC converter and a control unit, wherein the main battery pack, the auxiliary battery pack, the DC / DC converter and the control unit are located in the battery pack bin. The first end and the second end of theDC / DC converter are connected with the total positive end and the total negative end of the auxiliary battery pack. The third end of the DC / DC converter is connected with the total positive end and the total positive output end of the main battery pack. The four end of the DC / DC converter is connected with the total negative end and the total negative output end of the main battery pack. A chargeand discharge path of the main battery pack and the auxiliary battery pack is formed. The control unit is connected with the DC / DC converter, the main battery pack and the auxiliary battery pack. Charging and discharging control of the auxiliary battery pack is realized by controlling the working states of the DC / DC converter. The core standards of the main battery pack and the auxiliary battery pack are different. By means of the dual-source battery pack, the power and economy of the electric vehicle are ensured, meanwhile, the performance requirement for the auxiliary battery pack is reduced, and the cost of the dual-source battery pack is saved by 10-30% compared with the cost of an original battery set.

The invention discloses a motorcycle fuel evaporation system and a motorcycle thereof. The system comprises a fuel evaporation pipe, a carbon tank and a fuel tank lock body, wherein the fuel tank lock body is provided with a gas path; one end of the gas path is communicated with the fuel tank, and the other end is communicated with the fuel evaporation pipe and is sealed with the outside; the fuel evaporation pipe is connected between the carbon tank and the gas path; and the port of the fuel evaporation pipe is positioned on the position out of the engine fuel tank and is communicated with the gas path in the fuel tank lock body. Fuel steam can smoothly enter and exit via the gas path, and liquid is blocked because the port of the fuel evaporation pipe is positioned out of the fuel tank.When the motorcycle fuel evaporation system is applied to the motorcycle, fuel can be prevented from splashing or infiltrating into the fuel evaporation pipe so as to prevent the fuel evaporation pipe from being blocked, thereby guaranteeing balanced pressure in the fuel tank, bringing convenience for lowering emission and fuel consumption, prolonging the service life of the carbon tank and guaranteeing the dynamic performance and the use performance of the whole motorcycle. A gas and fuel separator, a dumping valve and other components are omitted, which lowers cost and makes the structural arrangement of the whole motorcycle simpler.