35results about How to "Improve starting efficiency" patented technology

Provided is a vehicle seat which, when subjected to a complex input load during a rear collision, can stably deform at a specific portion thereof to efficiently absorb impact energy in the rear collision. A vehicle seat (S) is provided with: frame's side sections (15a, 17a) located at the left and right sides of a seat back frame (1) and extending in the vertical direction; and frame's extension sections (17b, 18) extending from the frame's side sections (15a, 17a) toward the inner side in the left-right direction. Deformable sections (17k) which deform when an impact load is applied are formed at connection sections (17x) connecting the frame's side sections (15a, 17a) and the frame's extension sections (17b, 18). The deformable sections (17k) are formed adjacent to other deformable sections (17m, 17e) having different degrees of susceptibility to deformation.

The invention relates to the technical field of automobiles, and discloses a starting system and a control method. The starting system comprises an engine, a generator, a control unit, a gas storage tank, a suction pipeline and an electromagnetic valve. The generator can drive the engine to rotate. The engine comprises a cylinder, a piston and a throttle valve, the cylinder is provided with a gas intake manifold, and the throttle valve is arranged on the gas intake manifold. The two ends of the suction pipeline can communicate with the gas storage tank and the gas inlet manifold correspondingly, and the throttle valve and the suction pipeline are sequentially arranged in the flowing direction of gas in the gas inlet manifold. And the electromagnetic valve is arranged on the suction pipeline. In the shutdown process, the throttle valve is closed, the electromagnetic valve is opened, the piston sucks air in the gas storage tank through the gas inlet manifold, and the pressure of the gas storage tank is reduced. In the starting process, the pressure of the gas storage tank is smaller than the maximum allowable pressure of the gas storage tank, the throttle valve is closed, the electromagnetic valve is opened, and the gas storage tank extracts air of the gas inlet manifold, so that the compression reaction force of the piston is reduced, the starting efficiency is improved, and the NVH performance of the engine is improved.

The invention discloses a range extender starting control method, which comprises the following steps of: detecting the actual rotating speed and the actual current of a generator, and obtaining the target rotating speed and the target current of the generator according to a received starting control request; calculating and obtaining the output torque of the generator according to the target rotating speed and the actual rotating speed; calculating and obtaining the correction torque of the generator according to the target current and the actual current; performing weighting processing on the output torque and the correction torque to obtain a final output torque of the generator; and controlling and adjusting the torque of the generator by taking the final output torque as a target torque. Starting control of the range extender can be optimized, the starting efficiency of the generator is improved, and the starting time of the range extender is shortened, so that the electric advantages are brought into full play, and the purpose of quickly starting the engine is achieved.

A tribosystem for a piston unit includes the piston unit having a piston and at least one rolling body mounted rotatably in a rolling-body receptacle of the piston. The rolling-body receptacle is substantially comprised of a bearing material having a PEEK / PTFE matrix. A surface of the at least one rolling body is polished.

The invention relates to the technical field of automobiles, and discloses a starting system and a control method. The starting system comprises an engine, a generator, a control unit, a gas storage tank, a suction pipeline and an electromagnetic valve. The generator can drive the engine to rotate. The engine comprises a cylinder, a piston and a throttle valve, the cylinder is provided with a gas intake manifold, and the throttle valve is arranged on the gas intake manifold. The two ends of the suction pipeline can communicate with the gas storage tank and the gas inlet manifold correspondingly, and the throttle valve and the suction pipeline are sequentially arranged in the flowing direction of gas in the gas inlet manifold. And the electromagnetic valve is arranged on the suction pipeline. In the shutdown process, the throttle valve is closed, the electromagnetic valve is opened, the piston sucks air in the gas storage tank through the gas inlet manifold, and the pressure of the gas storage tank is reduced. In the starting process, the throttle valve is closed, the electromagnetic valve is opened, and the gas storage tank extracts air of the gas inlet manifold, so that the compression reaction force of the piston is reduced, the dragging torque of the generator is reduced, the starting efficiency is improved, and the NVH performance of the engine is improved.

The invention discloses a method and a device for verifying validity of device parameters. The method comprises the steps: when the device is started up, verifying by utilizing a first type verification rule which affects device operation and network stability; and verifying the configured parameters by adopting a second type verification rule when configuring the parameters. While the verification completeness is guaranteed, the startup failure caused by verification by utilizing an unnecessary verification rule in an upgrade starting process of the device is avoided; successful startup of the device is not only guaranteed efficiently, but the accuracy of online parameter configuration process of the device is also guaranteed; and the startup efficiency of the device is increased.

The invention relates to a pressurized light water type neutron source assembly, concretely a pressurized light water type neutron source assembly of a plurality of primary sources and secondary sources mutually arranged, which is required by starting the nuclear reactor core of an APR1400 pressurized light water reactor of a South Korea standard nuclear power plant model. The pressurized light water type neutron source assembly is characterized by comprising an upper pipe fitting inserting to the upper portion of the nuclear fuel assembly guide pipe of a pressurized light water reactor; a lower pipe fitting inserting to the lower portion of the nuclear fuel assembly guide pipe of a pressurized light water reactor, and composed of a pipe in connection with the lower end portion of the upper pipe fitting, and an end cover sealing the lower end portion of a pipe; and a neutron source unit comprising a plurality of primary sources and secondary sources mutually in series connection in the pipe, wherein neutron source units are mutually arranged under the condition of configuring the secondary sources among the primary sources.

The invention relates to the technical field of engines, in particular to an engine recoil starter. The engine recoil starter comprises a return spiral coil spring, a starting rope sheave and a ratchet which are disposed in a starter housing, wherein an elastic connecting device is disposed between the starting rope sheave and the ratchet; the elastic connecting structure is characterized in that an auxiliary starting plate is disposed between the starting rope sheave and the ratchet, the ratchet is disposed on the auxiliary starting plate, an energy accumulation spring is disposed between the auxiliary starting plate and the starting sheave, the two tips of the energy accumulation spring are respectively fixed on the corresponding lateral sides of the starting sheave and the auxiliary starting plate, and the ratchet is disposed on the other lateral side of the auxiliary starting plate. The engine recoil starter has the advantages that the starter is in reliable transmission and clutch with an engine, small in size, capable of correspondingly reducing the shape of the whole starter, easy in starting, labor saving, small in vibration, and high in use comfortableness.

The embodiment of the invention provides an electric automobile starting method and an electric automobile. The electric automobile starting method comprises the steps that the current load of the electric automobile is detected, and the current load quantity of the electric automobile is obtained; the starting torque of the electric automobile is obtained according to the current load quantity ofthe electric automobile, and a corresponding starting gear of the electric automobile at the time of starting is obtained on the basis of the starting torque; and a gearbox of the electric automobileis controlled to be in the starting gear, so that the electric automobile is started with the engaged starting gear. The electric automobile starting method is high in starting efficiency, the starting acceleration time of the automobile can be shortened, and the driving experience of a driver can be improved.

The invention relates to the technical field of auxiliary power units, in particular to a ground start device for a turbojet engine. The ground start device comprises an electrical system and a fuel system, wherein the electrical system comprises a driver, adjustable power supplies, a voltage-stabilized supply and relays; the fuel system comprises an ignition oil pump, a priority oil pump and fuelfilters; after the ignition oil pump and the priority oil pump work, fuel is divided into two paths to flow through an ignition oil input and a priority oil input interface on a ground start device panel from an external oil tank, enters two paths of the internal fuel filters and then enters the ignition oil pump and the priority oil pump, and is output to two paths of oil inlet interfaces from apanel ignition oil output interface and a priority oil output interface. The ground start device for the turbojet engine is high in starting efficiency; the device is not affected by the landform andthe starting on a special site can be realized; and furthermore, the device is simple in structure, and the small-size turbojet engine can adopt a plurality of ground start devices on a test flight site after matched flight, so that the multi-machine simultaneous starting and multi-machine simultaneous aircraft task are achieved.

The invention discloses a boost type direct current converter starting control method and device and a switching power supply. The method comprises a bootstrap capacitor pre-charging stage, an output voltage supplementing stage and an output voltage boosting stage which are executed in sequence. In the pre-charging stage of the bootstrap capacitor, the lower power tube is controlled to be switched on and switched off periodically, and the upper power tube is controlled to be switched off until the voltage at the two ends of the bootstrap capacitor reaches a pre-charging voltage threshold value; in the output voltage supplementing stage, the lower power tube is controlled to be kept switched off, and the grid voltage of the upper power tube is controlled to be gradually increased; and in the output voltage rising stage, the upper power tube and the lower power tube are controlled to be switched on alternately based on the preset soft start driving signal, and the duty ratio of the preset soft start driving signal is controlled to be gradually increased until the output voltage of the converter reaches the preset output voltage. The inductive current is reduced through a segmented control strategy, meanwhile, it is guaranteed that the charging voltage of the bootstrap circuit meets the starting requirement, current overshoot is avoided, and the safety and reliability of the circuit are improved.

The invention relates to high-voltage synchronous variable-frequency soft starting equipment and a starting method thereof. The high-voltage synchronous variable-frequency soft starting equipment comprises a harmonic filter, a step-down transformer, a step-up transformer, a rectifier bridge, an inverter bridge, a control panel, a synchronous motor and a gas turbine, one end of the harmonic filter is connected with a high-voltage power grid in parallel, the other end of the harmonic filter is connected with the high-voltage side of the step-down transformer, the low-voltage side of the step-down transformer is electrically connected with the input end of the rectifier bridge, the output end of the rectifier bridge is electrically connected with the input end of the inverter bridge, and the output end of the inverter bridge is electrically connected with the low-voltage side of the step-up transformer. The high-voltage side of the boosting transformer is connected in parallel with a high-voltage grid The control panel is electrically connected with the step-down transformer, the rectifier bridge and the inverter bridge respectively; the synchronous motor and the gas turbine are coaxially installed, and the synchronous motor drives the gas turbine to start. A position sensing-free detection method is adopted, the actual position of the rotor is indirectly detected by the back electromotive force of the armature winding of the synchronous motor, and the aim of tracking the rotating speed of the rotor through the synchronous rotating speed of the motor is achieved.

The invention relates to the technical field of engines, provides an engine control method and device, electronic equipment and a storage medium, and aims at enabling an engine to obtain proper pre-lubrication before starting and prolonging the service life of the engine. The method comprises the steps that the corresponding engine oil temperature value of an engine at the current moment and the initial engine oil pressure value are obtained; determining a target engine oil pressure value corresponding to the engine oil temperature value according to a pre-configured corresponding relation between the engine oil temperature value and the engine oil pressure value; controlling an engine oil pre-supply pump to pre-supply engine oil to the engine so as to adjust the initial engine oil pressure value; and when it is determined that the relation between the adjusted initial engine oil pressure value and the target engine oil pressure value meets a preset condition, the engine is controlled to be started. Due to the fact that the required engine oil pressure value is set according to the different engine oil temperature values, and the engine is controlled to be started after the set engine oil pressure value is reached, the engine can be properly pre-lubricated before being started, and the service life of the engine is prolonged.

The invention is applied to the field of passenger vehicles and new energy vehicles in the automobile industry. Two fuel engines with half power compared with a conventional fuel vehicle engine are arranged in the vehicle to generate power, and a motor is directly driven through variable speed control. The generated electric energy does not need to be stored and then discharged. A low speed driving state in urban comprehensive working condition is satisfied, only one engine works, and the optimal efficiency of the low-power engine under low-speed driving is achieved. In a high-speed driving mode or a motion mode, the two engines work at the same time, and the demand for publishing output multiplication is met. The invention further provides a kinetic energy recovery and storage system. The brake kinetic energy is collected and stored in the energy storage battery after being stabilized and rectified, the energy storage battery is switched to a battery working mode after being fully charged, the energy storage battery does not need to be specially and externally charged, 100% deep charging is met in the using process, and attenuation is avoided in the service life. The problems of battery weight, charging and discharging of a pure electric vehicle, oil consumption of a fuel vehicle and cost and efficiency of a hybrid power vehicle are solved. The problem that various new energy vehicles are high in cost and price is solved too.

The invention relates to the technical field of auxiliary power devices, in particular to a turbojet engine ground starting device, comprising: an electrical system, the electrical system includes: a driver, an adjustable power supply, a voltage stabilized power supply, a relay, a fuel system, and the fuel system includes an ignition After the fuel pump, priority fuel pump and fuel filter, the ignition fuel pump and the priority fuel pump work, the fuel flows from the external fuel tank in two ways through the ignition oil input and priority fuel input interfaces on the ground starter panel, enters the internal two-way fuel filter, and then to the ignition oil pump and the priority oil pump, and then output from the panel ignition oil output interface and the priority oil output interface to the two-way oil inlet interface of the engine. The ground starting device of the turbojet engine has high starting efficiency and can be started in a special place without being affected by the terrain. , the device structure is simple, after the small-sized turbojet engine is put into flight, multiple sets of the ground starting device can be used on the test flight site so as to realize the tasks of simultaneous starting of multiple machines and simultaneous flight of multiple machines.

The invention belongs to the technical field of self-priming pumps, and provides a self-priming pump with a return valve, the self-priming pump comprises a pump body, a guide vane and the return valve, the guide vane is arranged in the pump body, the inside of the guide vane is communicated with a water inlet channel of the pump body to form a first cavity, a second cavity is formed between the outside of the guide vane and the pump body, and the second cavity is communicated with a water outlet of the pump body; the return valve is arranged at the bottom of the guide vane and located in the second cavity. When the self-priming pump is started, the return valve is opened, and liquid in the second cavity flows back to the first cavity through the return valve; when the self-priming pump works normally, the return valve is closed. According to the self-priming pump with the return valve, the starting time of the self-priming pump can be shortened, the self-priming pump can be quickly started, and the working efficiency is improved.

The internal oil passing structure comprises a filter screen assembly, a one-way valve assembly, an oil inlet assembly and an oil pump motor which are sequentially arranged in a machine shell from bottom to top, a machine cover is fixed to the top of the machine shell, an oil cavity is formed in the bottom of the machine cover, an oil outlet assembly is arranged at the top of the machine cover, and a pressure relief valve assembly is arranged in the oil cavity. The one-way valve assembly is fixed above the filter screen assembly through a mounting seat, an oil inlet channel is arranged on the mounting seat and communicated with an oil inlet of the oil inlet assembly, the one-way valve assembly is communicated with an oil outlet of the oil inlet assembly, when the diesel pump is powered on, the one-way valve assembly is closed, and fluid enters the oil inlet assembly from the oil inlet channel, and when the diesel pump is powered off, the one-way valve assembly is closed. The one-way valve assembly opens and fluid enters the diesel pump from the one-way valve assembly. The problem that an engine is difficult to start is solved, the method is particularly suitable for oil supply systems such as diesel oil with weak fluidity, and good oil pumping performance and ignition speed can be kept even at low temperature.

The present invention relates to a piston unit for a radial piston machine, the piston unit having a piston and a roller or roller body, in addition to chamfering or similar structure, the roller or roller body having a cylindrical cover. In the equipment area between the piston and the roller, there is a hydrostatic pressure unloading device or force unloading device, which forms a pressure field here. Here, the roller has one or both end sides of the recess. By the concave parts (recesses), the rollers are slightly cut on the end segment of the mating, thereby reducing the Hertz stress here.

The invention relates to a soft start control system for a high-voltage and high-power electric hydraulic excavator. The soft starter is connected to the slip ring box and then to the main control unit, the main control unit is connected to the motor, the output shaft of the motor is connected to the hydraulic pump, the main control unit is connected to the soft starter through the slip ring box through an integrated cable, and the main control unit is also It is connected and communicated with the man-machine interface and the GPS device, and the GPS device communicates with the remote control center wirelessly. The soft start control system of the high-voltage and high-power electric hydraulic excavator provided by the present invention is applied to the 6kV / 10kV level, has the characteristics of strong power grid adaptability, small starting current, and diversified starting methods, and realizes the smooth start of the high-voltage motor without impact, Significantly save the boarding space, and can realize the transmission of high-voltage electric energy and CAN signal and remote data transmission.

The invention discloses a piston unit and a radial piston machine designed with at least one such piston unit. According to the invention, the piston of the piston unit is polished.

The invention discloses a step-up DC converter startup control method, device and switching power supply. The method includes: a bootstrap capacitor precharging stage, an output voltage complementing stage and an output voltage boosting stage which are executed in sequence; In the charging stage, the lower power tube is controlled to be turned on and off periodically, and the upper power tube is controlled to keep turned off until the voltage across the bootstrap capacitor reaches the precharge voltage threshold; in the output voltage compensation stage, the lower power tube is kept turned off, and the control The grid voltage of the upper power tube gradually increases; in the output voltage rising stage, the upper power tube and the lower power tube are controlled to be turned on alternately based on the preset soft-start drive signal, and the duty cycle of the preset soft-start drive signal is controlled to gradually increase , until the output voltage of the converter reaches the preset output voltage. The invention reduces the inductor current through a segmented control strategy, and at the same time ensures that the charging voltage of the bootstrap circuit meets the starting requirements, avoids current overshoot, and improves circuit safety and reliability.

The invention discloses a diesel engine starting control method and device, a storage medium and a vehicle-mounted terminal.The method comprises the steps that when lubricating oil is pre-supplied to a diesel engine, first lubricating oil pressure at different moments is recorded in real time; when the pre-supply duration of the lubricating oil reaches the preset duration and the first lubricating oil pressure at different moments does not reach the preset lubricating oil pressure within the preset duration, recording the second lubricating oil pressure when the pre-supply duration of the lubricating oil reaches the preset duration; calculating an oil pressure rise rate according to the second lubricating oil pressure; whether to start the diesel engine is determined based on the oil pressure rise rate. Due to the fact that judgment is carried out through the oil pressure rising speed, the pre-lubrication meeting condition is widened, meanwhile, the lubricating oil pre-supply duration is shortened, the risk of pump overload is reduced, and the starting efficiency of the diesel engine is improved.

The invention relates to a protection circuit assembly for starting a direct-current compressor. A base and an upper shell of the protection circuit assembly are fixedly connected to form a first accommodating space; a main circuit, a pre-charging circuit and a discharging circuit are arranged in the first accommodating space; the main circuit is used for providing a working power supply for the direct-current compressor; the pre-charging circuit is used for providing reactive compensation when the direct-current compressor is started so as to reduce the starting current; the discharging circuit is used for discharging after the direct-current compressor is shut down; a four-position wire connector is installed on the base, the four-position wire connector penetrates through the upper shell, the main circuit, the pre-charging circuit and the discharging circuit, and the direct-current compressor is electrically connected with a power supply through the four-position wire connector. Theupper shell is provided with a four-core wire holder, and the main circuit and the pre-charging circuit are in signal connection with an external control circuit through the four-core wire holder. The starting efficiency of the direct-current compressor can be improved, the service life of the direct-current compressor can be prolonged, and the direct-current compressor is small in size, simple in structure, convenient to assemble and disassemble and high in applicability.

The invention discloses an engine oil pre-supply control method before operation of a diesel engine, which comprises the following steps that an engine oil pressure signal is introduced into a PLC (Programmable Logic Controller) module, the real-time engine oil pressure of the diesel engine is monitored, different pressure interval sections are set to acquire comparison values according to the oil pressure required by the normal set of the diesel engine as a reference point, a pre-supply time comparison value is set according to the conventional pre-supply time of the diesel engine, the working state of engine oil pre-supply, the working state of a belt engine oil pump and the working state of a starting motor are determined by comparing the current pre-supply time with a pre-supply time comparison value and comparing the current oil pressure with a comparison value collected by a pressure interval end, the engine oil pre-supply working state, the machine belt engine oil pump state and the starting motor working state are determined, unnecessary resource waste is reduced, and the starting efficiency of the diesel engine is greatly improved.

Provided is a vehicle seat capable of efficiently absorbing impact energy generated upon a rear end collision in a manner such that the vehicle seat is stably deformed at a specific position with respect to a complex input load generated upon a rear end collision. A vehicle seat includes: frame side portions that are located at the right and left sides of a seat back frame and extend in the up to down direction; and frame extension portions that extend from the frame side portions toward the inside in the right and left direction. A connection portion that connects the frame side portions to the frame extension portions is provided with a deformation portion that is deformed when an impact load is applied thereto. The deformation portion is formed adjacent to other deformation portions having deformation characteristics different from that of the deformation portion.