42results about How to "Fast start" patented technology

The invention relates to a current predictive control method of a permanent magnet synchronous motor, which belongs to the electric control field. The dynamic response speed and the control accuracy for the stator current control of the permanent magnet synchronous motor are improved through stator current prediction and deadbeat control, and the system delaying is compensated, so that the noise and the torque ripple of the motor in operation are reduced. The method comprises the steps as follows: obtaining a three phase stator current signal, and the electrical angle and the electrical angular speed of the motor rotor through the technologies of sensor sampling and a photoelectric coded disc or position sensorless detection; carrying out Clarke transformation and Park transformation on the stator current signal to obtain the stator current in a synchronous revolution dq coordinate system; substituting the obtained stator current signal in the dq coordinate system into a control equation of a current predictive controller of the permanent magnet synchronous motor, carrying out deadbeat control according to the given value of the obtained stator current in the dq coordinate system in an outer ring controller to obtain a stator voltage vector in the dq coordinate system; carrying out Park inverse transformation on the obtained stator voltage vector in the dq coordinate system, to obtain a pulse-width modulation (PWM) control signal of an inverter by a space vector pulse width modulation (SVPWM) method, controlling the stator current through the inverter, and then implementing the current predictive control over the permanent magnet synchronous motor.

The invention relates to an automotive energy-saving emission-reducing hydraulic retarder comprising an oil pump and a hydraulic system which are mounted on an output shaft of a large or intermediate automotive transmission and connected therewith in parallel, and the automotive energy-saving emission-reducing hydraulic retarder not only has the function of the automotive hydraulic retarder, but also has the capability of recovering kinetic energy when braking an automobile and re-utilizing the kinetic energy during startup (or force application), and can further reduce the exhaust emission during the startup and realize the energy conservation and the emission reduction. The automotive energy-saving emission-reducing hydraulic retarder is characterized by being connected with the output shaft of the automotive transmission in parallel, so that the combination or the disengagement is convenient, a system can be disengaged when a fault exists, and a vehicle can still travel normally; the energy transfer during energy storage and energy release does not pass through a mechanical system of the original transmission, and the output shaft of the transmission is directly connected with a rear axle of the automobile with the help of a clutch, thereby reducing the load of the transmission; furthermore, the automotive energy-saving emission-reducing hydraulic retarder has obvious energy-saving effect, and can release the energy and apply the force during the startup of the vehicle, improve the working condition of an engine, reduce the emission of harmful gases; accelerate the starting velocity, improve the operation efficiency, change the mechanical rigid brake to the flexible hydraulic retardance, improve the riding comfort and simultaneously prolong the service life of a vehicle transmission and brake system.

The disclosed drive unit is composed of two parts: electric drive and speed change. Rotor shaft of electromotor is a hollow shaft, which is concentric to central axis of pedal plate. When power off, the pedal plate drives electric motor bicycle running. Magnetic resistance force does not interfere bicycle running. When power on, rotor is rotated at high speed under action of magnetic field. Being sheathed on the shaft of pedal plate, the hollow rotor shaft drives rotation of sun gear of speed change gear. Through three pieces of planet wheel, one-way internal gear, and wedge shaped clutch, the sun gear drives rotation of outer shell of speed change gear. Chain wheel installed on the outer shell through chain drives rear wheel forward. Features are: compact structure, reasonable center of gravity, and convenient installation and maintenance.

The invention discloses a braking kinetic energy regenerating hydraulic retarder for an automobile. The hydraulic retarder is an oil pump and hydraulic system arranged on power takeoff windows for gearboxes of large and medium automobiles. The hydraulic retarder not only has functions of the hydraulic retarder for the automobile, but also can recycle kinetic energy to be abandoned when the automobile brakes. The hydraulic retarder is characterized in that: the hydraulic retarder is connected in parallel with main transmission of the automobile, so the hydraulic retarder is convenient to joint and separate; remarkable energy-saving effect is achieved; energy is released and more force is applied when a vehicle is started, so the working condition of an engine is improved and the emission of harmful gas is reduced; starting speed can be increased and running efficiency is improved; mechanical rigid braking is replaced by flexible hydraulic retarding, so riding comfort is improved, the service lives of vehicle braking and a braking system are prolonged, and the safety performance of the vehicle is enhanced; and conventional mature hydraulic technology and hydraulic components produced in a large scale are adopted, so the system is simple and reliable, has low manufacturing cost, and is easy to popularize and apply.

A compressor drive system startup control method, device, apparatus, and a refrigerator are disclosed. The control method includes that a random carry frequency and an initial positioning current areobtained. According to the random carrier frequency and the initial positioning current, the positioning operation of the compressor driving system is controlled, the positioning current is controlledto increase, and the updated positioning current is detected. The bus voltage value is obtained when the positioning current updated within the preset positioning time length is detected to reach thepreset threshold value; According to the bus voltage value and the preset DC bus voltage waveform, the compressor drive system is controlled to switch to the open loop operation and the oil supply closed loop fixed frequency operation successively. The random carrier frequency reduces the amplitude of harmonic energy in the vicinity of the carrier frequency and integer multiples thereof, The starting control method enables the controller to output enough voltage when switching to the closed loop fixed frequency operation of the oil speed, and the driving system obtains the maximum starting torque of the motor, the starting speed is fast, the starting ability is strong, and the starting vibration noise is small.

The invention discloses a method of asynchronously starting an electrically-excited synchronous motor by a frequency converter. The method comprises steps: (1) a starting signal is sent; (2) rotation speed information is tracked and the frequency converter drives the motor to operate; (3) the actual motor operation rotation speed and the operation frequency are acquired, and whether the operation frequency at the time is larger than an exciting frequency point setting value is judged; (4) asynchronous operation to the exciting frequency point setting value is carried out; (5) stable operation is carried out to wait for exciting; (6) excitation is put in; (7) whether exciting succeeds or not is judged, in the case of success, a step (9) is executed, or otherwise, a step (8) is executed; (8) preparation is made for following re-operation of the frequency converter and the exciting of the motor; and (9) the motor enters a synchronous state, and at the time, the frequency converter drives the motor to synchronously operate to the frequency set by the frequency converter and stabilized to a set frequency, and other speed regulation instructions is waited. The method of the invention has the advantages that the principle is simple; synchronous starting can be quickly realized; and the controllability and the reliability are good.

The oscillating or reciprocating man-powered driver includes pedal, foot crank, ratchet and ratchet wheel or flywheel, and upper and lower safeguard mechanism. The upper and lower safeguard mechanism consists of middle transition wheel and chain or pulling rope, or consists of lever and connecting rod. The driver has gear rack or flywheel driving and has foot crank drives the flywheel directly or indirectly to rotate the back wheel shaft or the back hub. The upper and lower safeguard mechanism installed between two foot cranks to ensure the two cranks up and down alternately, and the ratchet and ratchet wheel mechanism or the flywheel mechanism ensures the applied force in the same direction as the required force. The present invention has saving in labor, fast starting, powerful dashing capacity, high efficiency and adjustable stroke.

High-luminance LED bar shaped light is as illuminated light sources. LED light sources are composed of regular arranged LED grains in same color or in different colors. Illumination mode in parallel light with small angle is adopted in the invention, that is to say included angle between light beam from light source and irradiated surface of cigarette package is less than 15 degrees. The invention eliminates reflected light from transparent plastic film on surface of cigarette package, and reduces influence on image caused by color change of cigarette package so as to raise image quality taken by camera, and raise detecting accuracy.

A motor driving method is provided. A rotor position is determined based on whether or not a neutral point voltage difference, or a voltage difference between neutral point voltage and pseudo neutral point voltage exceeds a predetermined threshold when an energization phase is sequentially selected and energized. The energization phase for starting a motor is determined based on the result of this determination, and the motor is energized and started according to the determined energization phase. The operation mode is not changed directly from a step for searching the initial position of the rotor to a counter electromotive voltage mode. Instead, a search start mode for supplying appropriate rotational speed to the initial startup of the motor is once established, and then the mode is changed to the counter electromotive voltage mode. Following problems are solved: a problem of the correctness of a peak value of a position detection signal taken in; a problem of proneness to be influenced by a variation in motor characteristics caused by the slightness of differences in detection currents between phases; and a problem that methods of comparing voltage differences determined with respect to each group of measured voltages that occurs at a neutral point of motor windings each time a detection signal is applied to determine a large voltage difference require a reference table and high computing power.

The invention relates to a method for quickly starting and stopping an engine of a hybrid electric vehicle and a control circuit thereof. Two crankshaft position sensors are assembled on a flywheel disk of the engine; and a position sensor is also assembled on a motor transmission gear disk. The engine can be stopped on a cylinder top dead center through the control of an electric control unit; and oil spraying and ignition treatment are directly performed on the cylinder top dead center when the engine is restarted. The method saves a crankshaft synchronization judgment process required when the engine is started and pre-spraying treatment in the synchronization judgment process. Thus, the method has the advantages that the engine is quickly started, starting and discharging is optimized, fuel consumption is reduced and the like.

A turbotype gas starting device of a diesel engine takes compressed air as air source power. The turbotype gas starting device mainly comprises a casing, an air inlet duct, a turbine driving mechanism, a planetary speed reducer, an isolator and a silencer which are formed into an overall structure, wherein turbotype gas starting adopts a structure consisting of the casing, a turboshaft, a turbine rotor, an inner impeller and an outer impeller; air changes an impact gas flow direction through the inner impeller, the turbine rotor and the outer impeller so as to exert a force moment in the same direction on the turbine rotor, thereby driving the turbine rotor to rotate; meanwhile, the planetary speed reducer is driven to rotate; the isolator undergoes automatic clutching and transmission so as to drive the diesel engine to start; and the silencer can effectively eliminate gas starting noise. The turbotype gas starting device has big starting force moment, quick, efficient, safe, stable and reliable starting, low noise and no lubrication; compared with the prior art, the starting speed of the device can be increased by 100 percent; moreover, the device can be started within 5 to 6 seconds, and is an ideal gas starting device of the diesel engine of a rubber-tired cart suitable for underground operation in severe environment at a coal mine.

The invention discloses a three-phase squirrel-cage AC (alternating current) asynchronous brake motor with a high start moment, which relates to a three-phase squirrel-cage AC asynchronous motor. The motor comprises a base, a front cover, a rear cover, a stator, a rotor, a spindle, a brake, a junction box and a fan, and is characterized in that: the rotor material is made from an aluminum-manganese alloy HRA20-3 by casting and machining. The invention has the advantages that: as the motor product adopts excellent magnetic circuit design, and the cast aluminum rotor adopts high-quality aluminum-manganese alloy aluminum, the rotor resistance of the motor is effectively increased, and the motor obtains a relatively high start moment to drive the lift equipment to work. The start moment of a common three-phase squirrel-cage AC asynchronous brake motor is 2.0-2.3 times of the rated moment, and the start moment of the motor product can reach 3.3-3.5 times of the rated moment. When the start moment is increased, the start speed is increased and the working efficiency is improved, thereby facilitating the start of materials of critical weight.

The invention discloses a power device of a fracturing truck. The power device comprises a base. The base is provided with a speed reducer and a fracturing pump support. The output end of the speed reducer is connected with a coupler. A fracturing pump is arranged on the fracturing pump support. The output end of the coupler is connected with the fracturing pump. The base is further provided with a supporting frame. The supporting frame is provided with a gas turbine and a starter motor starting the gas turbine. The gas turbine is connected with the output end of the starter motor. Power output by the gas turbine is transmitted through the speed reducer so as to drive the fracturing pump to work. Due to the fact that compared with a diesel engine, the gas turbine has the beneficial effects of being high in starting speed, low in weight, small in occupied space, large in power and adjustable in rotating speed, compared with an existing fracturing truck power device with the diesel engine as power, the power device of the fracturing truck is high in starting speed, low in weight, convenient to convey and small in occupied space during installation, meanwhile, power is large during work, the requirement of actual production can be met, and the rotating speed can be adjusted so as to meet the requirement for output of different values of power.

The invention relates to an aerated shoe technique which can improve walk amplitude and walk speed without external mechanical power. The invention uses a special sole, a shoe body and an aerate power ball, to transform the foot gravity into forward power, to reduce the foot vibration most, reduce the energy consumption, improve jump height, accelerate moving speed, reduce vibration, protect body, heighten body, and improve health or the like. The invention has simple operation, easy production, same appearance with general shoes, beautiful appearance, long service life, and high reliability, with wide application not limited by conditions.

The invention discloses a self-circulation anaerobic reactor. The self-circulation anaerobic reactor comprises a container, a water inlet pipe and a water distribution system, wherein the water inlet pipe is communicated with the lower part of the container; the water distribution system is positioned on the lower part of the container and communicated with the water inlet pipe; a baffle plate, a backflow funnel and a return pipe which is communicated with the backflow funnel are arranged in the container; the upper part of the container is provided with a gas collecting hood, an overflow weir and a water outlet pipe; the gas collecting hood is communicated with the gas outlet pipe; the wall of the container is provided with a splitter plate; the upper part of the container is at least provided with one gas collecting hood which is communicated with the gas outlet pipe; the backflow funnel is positioned on the lower edge of the gas collecting hood; the lower edge of each gas collecting hood is at least provided with one layer of baffle plate; each layer of baffle plate on the lower edge of each gas collecting hood at least consists of two plates which are slantwise arranged in the container but are not crossed; the outlet of the return pipe which is connected with the backflow funnel is positioned on the lower part in the container; thus, the reactor contributes to mixing of inlet water and gas, has high starting speed and produces backflow and middle turbulence at the preliminary stage of starting.

The invention discloses an aeroengine generating system. An aeroengine generating set comprises an electric motor / exciter which is coaxially connected with a generator and an aircraft in the aeroengine power generating set; an aeroengine generating control system comprises a main controller, a starting excitation controller and a fuel adjusting controller which form a distributed bus control network in a mode of a bus; each controller is an independent node on the bus; and the main controller is a main node, and the fuel adjusting controller and the starting excitation controller are slave nodes. Each control part is designed in a modularizing mode and controlled in a distributed mode, so that the individual and general safe, economic, stable and reliable operation is realized in the aeroengine generating system, and the aeroengine generating set has the advantages of fast starting, smooth transition, high control precision, simple operation, strong adaptability and high reliability. Compared with a centralized control system in the prior art, each controller has the control function, and a universal standard device can be adopted, so that the aeroengine generating system is easy to expand and the maintenance cost is greatly reduced.

The invention discloses a method of asynchronously starting an electrically-excited synchronous motor by a frequency converter. The method comprises steps: (1) a starting signal is sent; (2) rotation speed information is tracked and the frequency converter drives the motor to operate; (3) the actual motor operation rotation speed and the operation frequency are acquired, and whether the operation frequency at the time is larger than an exciting frequency point setting value is judged; (4) asynchronous operation to the exciting frequency point setting value is carried out; (5) stable operation is carried out to wait for exciting; (6) excitation is put in; (7) whether exciting succeeds or not is judged, in the case of success, a step (9) is executed, or otherwise, a step (8) is executed; (8) preparation is made for following re-operation of the frequency converter and the exciting of the motor; and (9) the motor enters a synchronous state, and at the time, the frequency converter drives the motor to synchronously operate to the frequency set by the frequency converter and stabilized to a set frequency, and other speed regulation instructions is waited. The method of the invention has the advantages that the principle is simple; synchronous starting can be quickly realized; and the controllability and the reliability are good.

The invention discloses an engine waste heat utilization system based on a bionic uniform heating plate and pulsating heat pipe phase change heat storage technology. A pulsating heat pipe phase changeheat accumulator based on the bionic uniform heating plate and pulsating heat pipe phase change heat storage technology is additionally installed in a cooling system. The device adopts the bionic uniform heating plate and pulsating heat pipe phase change heat storage technology, and the internal space of the device is partitioned. Cooling water and the waste heat in exhaust gas can be absorbed and stored in a water cooling region, a gas cooling region and a phase change heat storage region, the cold air is preheated in a gas preheating region, and therefore starting of an engine in a cold environment is facilitated. A bionic uniform heating plate, pulsating heat pipe and carbon nano tube paraffin phase change heat storage material in the device has an enhanced heat transfer effect, greatly improves the heat dissipation efficiency, enables heat transfer to be uniform, and avoids the phenomenon of local overheating. By the adoption of the engine waste heat utilization system, comprehensive utilization of the engine waste heat is achieved, the energy utilization rate is improved, and the purposes of saving resources and protecting the environment are achieved.

Provided are a charge controlling agent comprising, as the active ingredient, a metal compound of a cyclic phenol sulfide represented by the general formula (1) (wherein at least one of a plural number of Y's is a metal atom), and a toner comprising at least one kind of the above-described compound together with a coloring agent and a binder resin. This charge controlling agent overcomes the problems of less clearness in the early printed images and fluctuation in printed image qualities during continuous printing, shows a good charge rise which makes it applicable to high-speed printers employed in recent years, has an excellent environmental stability with little change in charge amount depending on a change in temperature or humidity, and has a large frictional charge amount. By using this charge controlling agent, a negatively charged toner having a high charge performance can be provided.

The invention discloses a self-starting three-phase synchronous reluctance motor, and relates to the field of reluctance motors. The motor comprises a rotor structure, which comprises a rotating shaft, wherein a rotor iron core is wound on the periphery of the middle of the rotating shaft, a stator coil is wound on the periphery of the rotor iron core, a base is arranged on the periphery of the stator coil, a front end cover is fittingly mounted at the front end of the base, a rear end cover is fittingly mounted at the rear end of the base, the front end cover and the rear end cover are assembled on the rotating shaft through bearings, the front end cover and the rear end cover are connected with the base through bolts, the rotor structure further comprises a rotor fan and cast aluminum guide bars, the rotor fan is installed on the rotating shaft and located on the rear side of the rotor iron core, pressing plates are fixed to the front end and the rear end of the rotor iron core, rectangular magnetic barriers and tooth grooves are formed in magnetic shoe part of the rotor iron core, the cast aluminum guide bars are arranged in the rectangular magnetic barriers and the tooth grooves, and balance blocks are further fixedly arranged at the two ends of the rotor iron core. According to the invention, the motor has self-starting capability and can reach a stable state under the condition of power supply of a three-phase alternating-current sinusoidal power supply.

The invention discloses a hydrogen fuel battery electric vehicle system, and belongs to the technical field of electric vehicles. The hydrogen fuel battery is connected with a permanent magnet double-drive liquid-cooled motor system, a lithium battery powers startup of a hydrogen fuel battery and an instrument; a hydrogen storage device is connected to the hydrogen fuel battery, an energy recoverysystem chassis is connected to the permanent magnet dual-drive liquid-cooled motor system, the permanent magnet double-drive liquid-cooled motor system is connected to a transmission, the transmission is connected to a driving wheel, a fuel tank is connected to a generator, and the generator supplies power to the magnetic double-drive liquid-cooled motor system, the lithium battery and the instrument. The system has the advantages of fast starting speed, long endurance mileage and fast charging speed, and simultaneously the system can ensure normal endurance mileage like a fuel truck in a remote area or when hydrogen cannot be replenished in time.

The invention discloses a numerical control boring machine for machining a thrust surface of an engine cylinder body, and relates to the field of mechanical machining equipment. An electrical system is connected with a servo motor and a motor, and a sliding seat and a hydraulic clamp are mounted on a machine tool base; the servo motor is connected with a ball screw assembly through a coupler, and the ball screw assembly is connected with a sliding plate in a threaded manner; and the sliding plate is matched with a guide rail on the sliding seat in a sliding manner. A boring head is fixed to the sliding plate, and a belt wheel is connected with the motor through the belt and is connected with a spindle through a spline sleeve; the boring rod is connected with the spindle; a pushing rod oil cylinder is fixed to a transmission device, and a piston rod of the pushing rod oil cylinder is connected with a spindle pushing rod through a rotating joint; the spindle pushing rod is connected with a pushing rod, and the pushing rod is provided with an inclined face boss; and the inclined face boss is matched with an inclined face groove of a tool apron sliding block, and a tool is arranged on the tool apron sliding block. The numerical control boring machine is simple, compact and reasonable in structure, high in starting speed, easy to operate, high in reliability and capable of achieving machining size compensation; and auxiliary time in the machining process is greatly shortened, and the product quality and the working efficiency are high.

The invention relates to the technical field of earthquake early warning, in particular to an emergency earthquake early warning and fast reporting mobile internet of things system; the system is characterized by comprising a monitoring and mobile communication unit and an alarm signal receiving unit, wherein the monitoring and mobile communication unit consists of an inertial transmitter, a remote site mobile communication module and a near field wireless alarm module, wherein a mechanical quantity receiving circuit in the inertial transmitter is electrically connected with a machine magneticconversion circuit and a switching value output circuit in sequence; and a decoding APP is implanted into the alarm signal receiving unit and logs in the mobile internet. Compared with the prior art,the system has the advantages that 1) a passive magnetic control switch is used for outputting switching value pulses instantly, and earthquake monitoring is carried out, and the early warning and fast reporting speed is high; 2) the earthquake triggering level can be adjusted roughly, and misoperation is avoided; and 3) a plurality of wireless communication means are adopted to achieve emergencyearthquake early warning fast reporting in a specified range.

A compressor drive system startup control method, device, apparatus, and a refrigerator are disclosed. The control method includes that a random carry frequency and an initial positioning current areobtained. According to the random carrier frequency and the initial positioning current, the positioning operation of the compressor driving system is controlled, the positioning current is controlledto increase, and the updated positioning current is detected. The bus voltage value is obtained when the positioning current updated within the preset positioning time length is detected to reach thepreset threshold value; According to the bus voltage value and the preset DC bus voltage waveform, the compressor drive system is controlled to switch to the open loop operation and the oil supply closed loop fixed frequency operation successively. The random carrier frequency reduces the amplitude of harmonic energy in the vicinity of the carrier frequency and integer multiples thereof, The starting control method enables the controller to output enough voltage when switching to the closed loop fixed frequency operation of the oil speed, and the driving system obtains the maximum starting torque of the motor, the starting speed is fast, the starting ability is strong, and the starting vibration noise is small.

The invention discloses a heat energy device for preparing superheated steam with waste heat steam, which effectively solves the problem that conventional heat sources for drying brown coal are uneconomic and have the hidden troubles of ignition and explosion. The device comprises a partition wall, a base, a heat exchange part, an upper independent smoke box, a lower independent smoke box and upper and lower integrated smoke boxes. Key points are that: the heat exchange part is provided with a low temperature heat exchange region, a medium temperature heat exchange region and a high temperature heat exchange region which are formed by a tube bundle heat medium exchanger respectively; tube cavities of the tube bundle heat medium exchangers at each heat exchange region are communicated withthe cavities of the upper independent smoke box, the lower independent smoke box and the upper and lower integrated smoke boxes respectively; staggered tube gaps between an upper tube plate and a lower tube plate of each tube bundle heat medium exchanger at the heat exchange part form a communicated cavity; the communicated cavity of the low temperature heat exchange region is connected with a waste heat steam conveying tube; and the communicated cavity of the high temperature heat exchange region is connected with a superheated steam supply tube. The device has the characteristics of rational structural design, stable performance, easy maintenance, low operating cost, energy conservation, consumption reduction, emission reduction and wide application range and can reduce the one-time investment when used for drying the brown coal.

The invention relates to a combustor started regenerative catalytic oxidation device with a plurality of reaction chambers for coal mine ventilation air methane. A VAM delivery pipe is connected with a VAM intake manifold through a blower, each reaction chamber is defined by a reaction chamber casing provided with a thermal insulation layer, and a catalyst ceramic layer is arranged in each reaction chamber. The device is characterized in that a combustor is arranged on the VAM intake manifold, an inlet of each reaction chamber is connected with the VAM intake manifold through an expansion pipe and a VAM intake branch pipe sequentially, an outlet of each reaction chamber is connected with a VAM exhaust manifold through a constricted pipe and a VAM exhaust branch pipe sequentially, and the other end of the VAM exhaust manifold is communicated with the air. A regenerative system comprises a regenerative inlet pipe, a regenerative fan and a regenerative connecting pipe provided with a regenerative valve, wherein the regenerative inlet pipe is communicated with the VAM exhaust manifold, and the other end of the regenerative inlet pipe is communicated with the VAM intake manifold through the regenerative fan and the regenerative connecting pipe sequentially. The regenerative catalytic oxidation device has the advantages of being compact in structure, high in heat recovery efficiency, simple in operation, rapid in starting speed, small in occupied area and the like.

The invention discloses a braking kinetic energy regenerating hydraulic retarder for an automobile. The hydraulic retarder is an oil pump and hydraulic system arranged on power takeoff windows for gearboxes of large and medium automobiles. The hydraulic retarder not only has functions of the hydraulic retarder for the automobile, but also can recycle kinetic energy to be abandoned when the automobile brakes. The hydraulic retarder is characterized in that: the hydraulic retarder is connected in parallel with main transmission of the automobile, so the hydraulic retarder is convenient to jointand separate; remarkable energy-saving effect is achieved; energy is released and more force is applied when a vehicle is started, so the working condition of an engine is improved and the emission of harmful gas is reduced; starting speed can be increased and running efficiency is improved; mechanical rigid braking is replaced by flexible hydraulic retarding, so riding comfort is improved, the service lives of vehicle braking and a braking system are prolonged, and the safety performance of the vehicle is enhanced; and conventional mature hydraulic technology and hydraulic components produced in a large scale are adopted, so the system is simple and reliable, has low manufacturing cost, and is easy to popularize and apply.