231results 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.

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.

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.

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 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.

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.