232results about How to "Improve boot performance" patented technology

A counterweight 40 attached to a crankshaft 38 has a projection 42, which is aligned with and faces an electromagnet 44 attached to a crank casing 46 when the crankshaft 38 is at a preset rotational position of ensuring good startability of an engine 22. Engine stop control starts a power supply to the electromagnet 44 to attract the projection 42 of the counterweight 40 at a timing when the projection 42 of the counterweight 40 is practically aligned with the electromagnet 44, on the condition that the revolution speed of the crankshaft 38 is lowered to or below a preset level immediately before a full stop of rotation of the crankshaft 38. This engine stop control stops the rotation of the crankshaft 38 and desirably holds the crankshaft 38 at the preset rotational position of ensuring good startability of the engine 22.

The invention relates to a control method of low-speed stage starting of static frequency conversion starting of a pumped storage power station, comprising the following steps: calculating the initial position of a rotor; estimating each force commutation moment of a low-speed stage inverting bridge according to a preset constant acceleration value; electrifying an appointed two-phase winding at the unlocking moment of a frequency converter according to an interval to which the initial position of the rotor belongs; switching a rectifier bridge to an inversion run mode at the forced commutation moment, sending a trigger pulse to a thyristor bridge arm corresponding to the appointed two-phase winding according to an interval to which a rotor position angle belongs at the moment after a loop of a frequency converter is cut out and each bridge arm of the inverting bridge is reliably shut off, and simultaneously switching the rectifier bridge to a rectifying run mode, and ending single forced commutation; ending the low-speed run stage if the rotor speed is higher than or equal to 5 percent of specific speed of a machine set, and then switching to a natural commutation stage based on machine terminal voltage, or carrying out the forced commutation again; and if starting exceeds time, regulating the preset constant acceleration value, and then restarting until successful starting. The invention can realize rapid and reliable frequency conversion starting at the low-speed stage of the machine set of the pumped storage power station as long as a set value of the constant acceleration of machine set starting is regulated.

A lithium-ion auto startup storage battery with a supercapacitor function, includes a power supply, composed of a plurality of lithium batteries connected with each other in series; a supercapacitor connected with the power supply in parallel; an over charge-discharge protection device connected with the power supply in parallel; and a double-loop charge-protection system connected with the supercapacitor in parallel, which includes an inner loop circuit and an outer loop circuit, so that a constant current charger achieves firstly a constant current and then a constant voltage when the lithium-ion battery is charged. The present invention further includes a digital control voltage feedback multilevel current device to resolve an equilibrium problem of connecting large-capacity lithium-ion batteries in series. The present invention further includes a bidirectional current automatic converter to make a standard two-wire battery charge and discharge system of automobile achieve a three-wire system function of lithium-ion battery.

An internal combustion engine having a plurality of banks; each having a cylinder provided to said banks comprising: an intake valve provided between said cylinder and an intake manifold a camshaft opening and closing said intake valve by means of mechanical power of said internal combustion engine; and a changing unit changing, according to an operating state of said internal combustion engine a phase angle of said camshaft said phase angle corresponding to a closing timing of said intake valve said banks differing from each other in most retarded phase angle changed by said changing unit.

The invention discloses a floating-type cushion cylinder, comprising a cylinder barrel, a cylinder bottom head, a piston rod and a piston; wherein, the piston rod is extended back to front; a back end surface of the piston rod is provided with a cushion plunger which is in integral structure with the piston; the cylinder bottom head is provided with stepped holes which are located on the same axes with the piston rod; the diameter of a small hole of the stepped holes is larger than the external diameter of the piston rod, while a big hole of the stepped holes is internally provided with a cushion collar and an internal circlip which is used for preventing the cushion collar from sliding out in a floating manner; the cushion collar is provided with a cushion hole; a cushion gap is formed between the excircle of the cushion plunger and the cushion hole after the cushion plunger is driven by hydraulic oil to enter into the cushion hole. In the invention, the cushion collar is designed in a floating type, so when entering into the cushion hole, the cushion plunger can be automatically centered to reduce the cushion gap, thus having better cushion effect, effectively preventing striking when the cylinder cushion retracts to the cylinder bottom; and the cylinder has fine initiation. The invention is simple in structure and strong in practicability.

The invention discloses an integral vehicle thermal management system for a plug-in hybrid electric vehicle. The integral vehicle thermal management system comprises a high-temperature cooling system,a medium-temperature cooling system, a low-temperature cooling system, a battery cooling system and an air conditioning system. The integral vehicle thermal management system for the plug-in hybrid electric vehicle has advantages that by design according to heating quantity and cooling demands of different parts, mutual influences of parts are avoided, high requirements on utilization temperatureof each part can be met, functions and performances of each part are guaranteed, and the service life of each part is prolonged while efficiency of each part is improved; by integration of a power battery thermal management system and the air conditioning system, the maximum utilization rate of integral vehicle thermal environmental resources is achieved; when warm air is required under a pure electric operating condition, engine waste heat and transmission heat are fully used while a PTC (positive temperature coefficient) heater is applied so as to reduce engine starting frequency, and energy saving, environmental friendliness and comfort of the whole vehicle are improved; by adoption of transmission heat for engine preheating under the pure electric operating condition, the engine starting performance is improved, and economy and emission performances of the whole vehicle are effectively improved.

A current reference circuit is disclosed. A small startup current is defined as the base current into a bipolar transistor with its collector-emitter path connected in series with a resistor between the power supply voltage and ground. This startup current is conducted via a diode-connected MOS transistor in a first leg of a current mirror. Temperature compensation is maintained by a reference leg in the current mirror that includes a bipolar transistor having an emitter area N times larger than that of a bipolar transistor in a second leg of the current mirror, to establish a temperature-compensated current in the reference leg. A compensation capacitor connected between the collector and base of a bipolar transistor in the first leg suppresses oscillation, and can be modest in size due to the Miller effect.

A single-pipe cylinder-type reformer includes a plurality of circular cylinders standing upright coaxially and forming therebetween a zigzag gas flow path allowing a raw material gas to flow therein, a radiation cylinder coaxially arranged inside the plurality of circular cylinders, a burner arranged at one end of a center of the radiation cylinder for generating a combustion gas, a reforming catalyst layer obtained by packing with a reforming catalyst at least a first gas flow path section of the gas flow path closest to the burner. A metal pre-heat layer formed on an upstream side of the reforming catalyst layer is packed with a metal packing. Helical dividing means are provided in each gas flow path section of the gas flow path to extend in the axial direction of the circular cylinders. The helical dividing means helically divide a gas and make it flow through the first gas flow section.

The invention provides a range extender control method and device and a range extending type electric automobile and relates to the field of electric automobile control. The problems that an existing range extender is low in starting successful rate and poor in riding comfort, and an electricity generating situation occurs are solved. The range extender control method comprises the steps that the target drag torque value of a generator is obtained according to the current engine temperature, and fixed torque drag control over the generator is conducted; the rotating speed calibration value for allowing oil injection of the engine is obtained according to the current engine temperature and the atmospheric pressure, and when the actual rotating speed of the generator reaches the rotating speed calibration value, the engine is controlled to inject oil; the rotating speed calibration value for allowing torque attenuation of the generator is obtained according to the current engine temperature and the atmospheric pressure, and when the actual rotating speed of the generator reaches the rotating speed calibration value, torque attenuation control is conducted on the generator; and if the actual rotating speed of the generator is larger than the target idle speed of the engine, the target drag torque of the generator is assigned to be zero, and idle speed control is conducted on the engine. According to the range extender control method and device and the range extending type electric automobile, the starting successful rate and the riding comfort of the range extender are improved, and the electricity generating situation is avoided.

The invention relates to an additive of fuel, in particular to an additive of high-proportion methanol gasoline, such as M50 methanol gasoline. The additive is characterized in that the additive in the total volume ranging from 2% to 5% is added into the methanol gasoline and consists of 60% to 70% of mutual solvent formed by compounding alcohols, alcohol ethers, esters and acetones according to optional proportion, 24.4% to 30% of ignition agent formed by compounding fatty hydrocarbons, aromatic hydrocarbons and methyl tertiary butyl ether according to optional proportion, 4% to 6% of combustion improver formed by compounding nitryls and nitrate esters according to optional proportion, 1% to 3% of corrosion inhibitor formed by compounding phenols and grease according to optional proportion, and catalyst and anti-oxidant stabilizer in proper quantity. By the aid of the additive, the service life of a gasoline tank can be prolonged evidently, methyl alcohol system of the gasoline can be effectively guaranteed against being deteriorated and layered easily, and the problems of poor startability and power performance and the like can be solved effectively. The additive is rich in raw material sources, simple in production process and procedures and convenient in use and popularization.

A luminaire includes a discharge lamp, a lighting device supplying a power for lighting the discharge lamp, and a lamp body for housing the discharge lamp and an igniter for starting the discharge lamp, the lighting device and igniter being provided separately, while the lighting device being disposed in the lamp body, whereby such parts employed in the lighting device as harness or the like to which a high voltage is applied can be shortened in the length to be able to improve the safety.

The invention discloses a symmetrical permanent-magnet linear synchronous motor. The motor comprises a rotor and a plurality of stator guide rails symmetrically arranged on both sides of the rotor, wherein the plurality of stator guide rails forms a movement track where the rotor moves; both sides of the bottom of the rotor are symmetrically provided with three groups of array permanent magnets respectively, each stator guide rail includes an U-shaped structure, and open ends of the U-shaped structures of the stator guide rails on both sides are oppositely arranged; the upper and lower positions of the open ends of the U-shaped structures are respectively fixed with a traction force coil, and a suspension force coil is fixedly installed inside the bottom of the U-shaped structure; the suspension force coil inside the bottom of the U-shaped structure interacts with the array permanent magnet at the corresponding position of the bottom of the rotor, and the traction force for upwardly suspending the rotor and the normal force are simultaneously generated; the suspension force coils on the stator guide rails symmetrically arranged on two sides of the rotor interact with the normal force generated by the array permanent magnet, so that the rotor of the linear motor always moves at the center of the guide rail.

The invention discloses a novel environmentally-friendly high-efficiency methanol gasoline composite additive formula. Components of the formula contain no substances, such as sulphur, phosphor, benzene, heavy metal and the like, that are harmful to the environment and human body, and multiple problems such as low calorific value, layering, cold-start, thermal resistance, corrosion and the like, that appear during the using process of methanol gasoline are solved. The formula contains, by volume, 10-30% of alkane, 5-15% of an ether compound, 5-30% of an alcohol component, 5-15% of an ester compound, 5% of a high energy agent, 5-15% of a plasticizer, 5-15% of a cleaning agent, 0.001% of a nano-catalyst and 1-15% of an anti-oxidant and anti-corrosive additive. The methanol gasoline blended according to the formula has high calorific value, is safe to use and is economic and environmentally friendly.

The present invention relates to a fuel nozzle capable of implementing multiple injection. It belongs to an injection device of fuel combustion system of internal combustion engine. Said fuel nozzle is characterized by that the lower end portion of needle valve of said fuel nozzle is equipped with a circumferential ring groove and on the internal cylindrical surface of said needle valve body a fuel guide groove is set. Said invention also provides the working principle of saod fuel nozzle, it can make the combustion of engine fuel and complete, and can improve noise and starting performance of internal combustion engine. Said fuel nozzle also can be used in direct injection ignited engine.

There is provided a DC motor drive device of the open loop control method. It is judged whether speed instruction data supplied corresponds to the DC motor drive instruction according to the speed instruction data. When it is decided that the speed instruction data is a drive instruction, switch means is controlled by a PWM pulse of a predetermined duty ratio during a predetermined acceleration period, thereby accelerating the DC motor. When the acceleration period has terminated, the switch means is controlled by a PWM pulse of the duty ratio in accordance with the speed instruction data, there by driving the DC motor. This limits the start current when performing start so as to reduce withstand current of a switching transistor or the like and surely performs start so as to increase the motor speed control range.

The invention discloses an engine torque control method capable of improving the start performance of a whole vehicle, and belongs to the field of control technology. The technical proposal is that the method can detect high position clutch switching signal, the low position clutch switching signal, the neutral position signal and the vehicle speed signal of a vehicle in real time; only when the clutch is detected to be between a totally disengaged state and a half clutch state, the gear of a gear box is not in a neutral position, and the vehicle speed is less than a preset threshold value, the vehicle is judged to be in a starting working condition; at the moment, the output torque value of an idle speed controller is enlarged by raising the idle speed of an engine through idle speed compensation, then the output torque of the engine is enlarged, and the smooth start of the vehicle is realized. The method can accurately determine the starting working condition of the vehicle according to the high position clutch switching signal and the low position clutch switching signal, effectively avoids misjudgment of the starting intention of a driver, improves the start performance of the vehicle, eliminates accident potentials caused by sudden movements of the vehicle, and improves the driving safety of the vehicle.

The invention discloses a cage type rotor shaft radial mixed magnetic flux multi-disc type permanent magnet motor. The permanent magnet motor comprises a motor shell, a motor rotor and a motor stator, wherein the motor shell consists of a rotary shaft, bearings, end covers, pressing covers and a machine shell jointly; the motor rotor consists of two coaxially-fixed outer rotors and a salient pole rotor in the middle jointly; the motor stator consists of a plurality of modular T-shaped stator iron cores in circumferential distribution, a winding and an aluminum ring; the two outer rotors comprise outer rotor yoke parts, permanent magnets, cage grooves and cage rings separately; the permanent magnets are arranged in a combined type bidirectional inclined pole structure; the stator iron cores and the aluminum ring are both concentric with the salient pole rotor; and the rotary shaft, the salient pole rotor, the stator iron cores, the aluminum ring and the machine shell are arranged in sequence from the rotary shaft to the machine shell. By virtue of the cage type rotor shaft radial mixed magnetic flux multi-disc type permanent magnet motor, the slot space-factor, the winding end part utilization rate, the torque quality, the torque and power density, the low-speed and high-speed operating performance of the motor, and the overall operating efficiency of the motor can be improved.

On the occasion of a cutoff of fuel supply to an engine in an accelerator-off state, the invention expands a throttle opening over a specific throttle opening set in the state of idling of the engine at the reference rotation speed. On resumption of fuel injection to the engine, the invention reduces the throttle opening to the specific throttle opening set in the state of idling of the engine at the reference rotation speed. Under no control of lowering the rotation speed of the engine by a motor or under the condition of low vehicle speed with control of lowering the rotation speed of the engine by the motor, the invention resumes fuel injection to the engine resumed with setting of a smaller correction amount to a fuel increase correction amount.

The invention relates to a control system and a control method for a dynamic reactive power compensator. The control system comprises a motor starting switcher which is connected to the input end of a large asynchronous motor, wherein a first path of switching signals and a fourth path of control signals output by the motor starting switcher are input to a reactive power regulator; the output endof the reactive power regulator is connected with a voltage regulator by a switcher; the on / off of the switcher is controlled by a second path of switching signals output by the motor starting switcher; a third path of switching signals output by the motor starting switcher are input into a motor starting reactive power compensator to control the on / off of the motor starting reactive power compensator and the voltage regulator; and reactive power signals output by the motor starting reactive power compensator are input into the voltage regulator, and the voltage regulator performs rapid dynamic reactive power regulation on the dynamic reactive power compensator under the control of a fifth path of control signals output by the motor starting switcher according to received reactive power output by the reactive power regulator and the reactive power signals. The control system and the control method can be widely applied in the field of motor and power system control.

The invention discloses a cooling device and method for a cylindrical power battery pack. The cooling device comprises a battery pack and a cooling structure thereof. The cooling structure includes a cooling channel which is distributed at two side faces of the battery pack and the inside of which is provided with a cyclically flowing cooling working medium, and heat pipes for transferring the heat generated by the battery pack to the channel body of the cooling channel; the heat generated by the battery pack is indirectly transferred to the channel body of the cooling channel through the heat pipes, and the heat generated by the battery pack is taken away by the cyclically flowing cooling working medium in the cooling channel. For the device, the heat pipes are adopted for heat-dissipation of the battery pack, the entire device is compact, small in floor space, flexible in layout, and easy for the connection between single cells. The cooling device has the advantages of simple structure, environment protecting and energy saving, easiness in installation and convenience in maintenance, so the problem of dissipation of the cylindrical power battery pack under different working conditions is solved to reduce the maximum temperature and the overall temperature difference of the battery pack, which has a good application prospect.

The invention relates to a power generation device, in particular to a vertical-axis clutch type wind power generation device so as to solve the problems that an existing large-power vertical-axis wind power generator is difficult in self-starting and braking and low in power generation efficiency. The vertical-axis clutch type wind power generation device comprises a wind wheel, a first transmission shaft, a wind wheel locking device, a first coupler, a second transmission shaft, a third coupler, a clutch, a speed increasing gear, a support, a second coupler, a power generator, a tower and two brake devices. The vertically-arranged first transmission shaft is rotationally arranged on the top of the tower, one brake device is arranged on the top of the tower, and the wind wheel locking device is arranged on the top of the part, below a flange plate, of the tower. The upper end of the first transmission shaft is connected with the wind wheel, the lower end of the first transmission shaft is connected with the first coupler, and the speed increasing gear is fixed to the support. The clutch is connected between the second transmission shaft and an input shaft of the speed increasing gear, an output shaft of the speed increasing gear is connected with an input shaft of the power generator through the second coupler, and the other brake device is arranged on a power generator shell. The vertical-axis clutch type wind power generation device is used for wind power generation.

A device for controlling a choke valve of a carburetor for an engine includes: a choke closed state hold device for holding, in a closing position, a choke lever urged by a spring in a direction for opening the choke valve, when the choke lever is turned to the closing position, the choke closed state hold device releasing the choke lever from the held state by a throttle operation thereafter performed; a control lever which turns between a low-temperature position and a high-temperature position, and which at its low-temperature position limits the position of the choke lever released from the choke closed state hold device to an intermediate position and at its high-temperature position limits the position of the choke lever to an opening position; a first control spring which urges the control lever toward the low-temperature position; and a second control spring which is made of a shape memory alloy, and which turns the control lever to the high-temperature position when the engine temperature reaches a predetermined high temperature. With this arrangement, the opening of the choke valve is controlled in a rational way according to changes in engine temperature, to thereby stabilize warm-up operation and improve the fuel consumption rate.

When a fuel tank is inclined at a negative slope and tilted to the right side, it may be tilted such that a position of a mesh member is relatively higher than a position of a vapor outlet of a vapor outlet passage. In this case, air may enter into a leak passage from an outlet port such that interfacial tension is generated in the mesh member. The interface between fuel and air is present at the mesh member, and the interfacial tension generated at the interface serves to prevent air from entering into a discharge pipe.

The invention discloses a variable pitch method for a tidal current energy generating set. The variable pitch angle of the tidal current energy generating set ranges from 0 degree to 270 degrees. The method comprises the steps that the full feathering angle of forward incoming currents is set to be 0 degree, the angle for capturing the maximum energy of the forward incoming currents is set to be 90 degrees, the full feathering angle of reverse incoming currents is set to be 180 degrees, and the angle for capturing the maximum energy of the reverse incoming currents is set to be 270 degrees; in the condition of the forward incoming currents, oar blades are set at 0-90 degrees to conduct power adjustment; in the condition of the reverse incoming currents, the oar blades are set at 180-270 degrees to conduct power adjustment. According to the variable pitch method for the tidal current energy generating set, the bidirectional variable pitch is adopted, it is ensured that the generating set can work in the bidirectional tidal currents by rotating the blades by 0-270 degrees, the tidal current energy is fully captured, application is conducted flexibly, the energy capture efficiency can be improved, and the power generation capacity can be increased.

An engine ECU stores a map in which a region at high temperature and high pressure, a region at low temperature and low pressure, and a region provided therebetween are defined by the relationship between the temperature and pressure of fuel and the saturation fuel vapor pressure of the fuel. The engine ECU executes a program including the following steps: when start-up of the engine is requested, detecting the engine cooling water temperature and the fuel pressure; if the detection results fall into the region, setting a pre-feed time; pre-feeding until the fuel pressure reaches a desired fuel pressure threshold; and when the fuel pressure reaches the fuel pressure threshold, starting cranking. In this way, start-up failure due to fuel vapor can be avoided without unnecessarily actuating a fuel pump.

When an alcohol mixed fuel is supplied to an internal combustion engine, the magnitude of the alcohol concentration (more specifically, ethanol concentration Cetha) is determined (step 1005), and the magnitude of an operation state temperature (more specifically, cooling water temperature THW) is determined on the basis of said determination (step 1015). When the alcohol concentration is high and the operation state temperature is low, the generation of intermediate products (more specifically, aldehydes), which are alcohol oxides contained in unburned alcohol mixed fuel, is promoted, and the intermediate products generated are trapped in an intake passage by opening an intake valve in the expansion stroke of the internal combustion engine (step 1055).

This invention in the broadest sense comprises a ski boot, freely pivoting at the ankle, in combination with an adjustable suspension shock absorber to control and optimize compression and rebound damping characteristics. In the preferred embodiment, the ski boot would comprise a rigid, pivoting exoskeleton (providing the lateral stiffness and torsional control), a sub-boot (providing padding, thermal insulation, and water-proofing), and a fully adjustable pneumatic / hydraulic / spring suspension system (providing adjustable fore-aft stiffness, shock absorption, and rebound damping). The object of the invention is to optimize ski boot performance by separating the necessary boot components, allowing them to be designed to optimize different performance characteristics.

The invention relates to an exterior rotor permanent magnet brushless direct current (DC) fan motor for an air-conditioning system for a ship. The fan motor comprises a case and a shaft fixed in the case, wherein non-homocentric circular arc-shaped magnetic steels are fixed on the inner walls of the case by magnetic steel fixing rings; stator supports are installed on the shaft by bearings; stator cores are fixed on the stator supports and are formed through superimposition of a plurality of stator plates; the stator cores are provided with stator teeth and stator slots which are uniformly alternate and have different widths; insulating stator frames are installed on the stator cores; stator windings are embedded in the insulating stator frames; one stator winding is connected with a lead; and epoxy materials are packaged on the stator windings. The fan motor has a simple structure, good startup performance, small torque ripple, low noise, high efficiency, high power density and long life, is convenient to install and reliable to operate, can be remotely controlled by a computer and is especially suitable for the air-conditioning system for the ship.

The invention discloses a weeping oriental cherry tissue culture method including the steps: preparation of an explant, initiation culture, multiplication culture and rooting culture; a culture medium of the multiplication culture contains 0.2-0.5 mg / L of 6-BA, 0.03-0.07 mg / L of NAA and 5-15 mg / L of GA. The weeping oriental cherry tissue culture method has the advantages of lower contamination rate and good starting effect; the induced differentiation rate of the initiation culture can reach 84%; in the multiplication culture stage, weeping oriental cherry can perform normal jointing, tissue-cultured seedlings grow healthy and strong, the problems of shortened internode and easy aging generally appearing in a traditional oriental cherry tissue culture process are solved, and the multiplication coefficient can reach 7.0.