404 results about "Fuel pump" patented technology

The invention belongs to the field of target drone fuel oil systems, and particularly relates to a self-adaptive supersonic speed target drone fuel oil system and a control method thereof. The system comprises a machine body oil tank, a first electromagnetic valve, an overflow valve, a pressurization oil tank, a fuel pump, an engine pump, a monitoring module and a control module. The body fuel tank comprises a main fuel tank and an auxiliary fuel tank which are arranged in a fuel tank in the middle of the target drone body and located in front of and behind the theoretical mass center of the target drone respectively. The pressurization oil tank is additionally arranged in the fuel oil cabin, fuel oil in the engine body oil tank enters the pressurization oil tank for pressure maintaining after being pressurized by the fuel oil pump, and then oil is supplied to the engine from the pressurization oil tank, so that stable oil supply to the engine is achieved by establishing a local pressure environment instead of a large pressure environment of the whole fuel oil cabin, and therefore when a fuel oil system works, the fuel oil can be stably supplied to the engine. The oil supply flow and pressure are controlled in a closed-loop mode in real time through the control system according to the engine state.

The invention relates to the technical field of generator fuel pump control, in particular to an energy-saving generator fuel pump optimization method and system. Comprises: continuously collecting operation parameters of a generator system, and determining whether the generator system is in a stable operation condition; after the stable operation working condition is judged, perturbation testing is executed, and the actual output pressure and the actual fuel flow of the fuel pump are obtained; calculating the performance deviation of the fuel pump, and carrying out trend analysis to identify continuous performance drift; when the trend analysis shows that continuous performance drifting exists, self-adaptive correction is conducted on the fuel pump control basis to obtain the corrected fuel pump control basis; and the corrected fuel pump control basis is applied to control operation of the fuel pump. The problems that hidden energy consumption is increased and equipment failure risks are caused when an existing generator fuel pump control system is in the face of tiny changes of fuel physical attributes and gradual degradation of the performance of a fuel pump are solved.

The invention belongs to the technical field of aircraft engine accessory casing structural design, and particularly relates to an aircraft engine accessory casing fuel pump gear shaft spline bearing lubricating structure which comprises an oil passing shaft and an adapter ring. The oil passing shaft is a hollow shaft and is arranged in the end, provided with the gear, of the gear shaft, the end of the gear shaft is sleeved with a bearing, the bearing is located on the outer side of the gear, and a spline is arranged in the other end of the gear shaft. The gear shaft is provided with a plurality of bearing lubricating channels distributed in the circumferential direction, all the bearing lubricating channels are communicated with the portion between the bearing and the gear, and all the bearing lubricating channels incline towards the bearing. The adapter ring sleeves the oil passing shaft and is connected to the inner side of the gear shaft; an annular oil collecting groove is formed in the end portion of the end, facing the spline, of the adapter ring, an annular oil collecting cavity is formed between the adapter ring and the gear shaft, the annular oil collecting groove and the annular oil collecting cavity are communicated through a plurality of oil through holes distributed in the axial direction, and the annular oil collecting cavity is communicated with the bearing lubricating channels.

The invention belongs to the technical field of internal combustion engine power devices, and discloses a double-piston mechanism for an internal combustion engine, which comprises a cylinder body, and more than one cylinder is arranged in the cylinder body; an air inlet seat and an air outlet seat are installed on the upper portion and the lower portion of the cylinder body respectively, an air inlet pipe and an air outlet pipe are arranged in the air inlet seat and the air outlet seat respectively, and an air inlet channel and an air outlet channel are arranged in the air inlet pipe and the air outlet pipe respectively. A control device for gas distribution is arranged at the corresponding position of each cylinder; a high-pressure oil pump is arranged outside the cylinder body, and the high-pressure oil pump is communicated with the oil sprayer through a high-pressure oil pipe; a piston assembly I and a piston assembly II are symmetrically arranged in each cylinder body, and a bevel gear set I and a bevel gear set II which are matched with the piston assembly I and the piston assembly II to transmit power are further arranged in each cylinder body. The power performance of the internal combustion engine can be improved through the two piston assemblies, the device is small in size and light in weight, and single-machine fuel consumption and operation cost are effectively reduced.

An armature for use in an armature assembly associated with actuation of valves, such as for fuel injectors, fuel cells and / or fuel pumps, is disclosed. The armature includes a body having: a first end having a flange; and a shaft extending from the flange to the second end of the body. The second end portion includes a recessed surface configured to reduce stress on the armature upon an impact. The armature may be made of a low strength material of high permeability, thereby reducing remanence in the armature, assisting in demagnetization release, and reducing delay at the end of ejection.

A brushless fuel pump comprises a machine shell, a pump assembly and an upper end cover are arranged at the two ends of the machine shell, riveting rings are integrally arranged at the two ends of the machine shell, the machine shell is fixedly connected with the pump assembly and the upper end cover through the riveting rings in a pressing riveting mode, the connecting mode is simple and reliable, the structural strength is high, and the sealing performance and integrity of a pump body in the high-pressure working environment can be effectively guaranteed; a brushless motor is arranged in an inner cavity of the machine shell and comprises a support, a rotor is arranged in the support in a rotating mode, a plurality of inner stator punching sheets with winding wires are arranged on the side wall of the inner side of the support, the outer side of the support is sleeved with outer stator punching sheets, and the outer stator punching sheets are arranged on the outer side of the outer stator punching sheets. A structure that an inner stator punching sheet and an outer stator punching sheet are combined is adopted, optimization of a magnetic field and improvement of motor torque and efficiency are facilitated, the pump assembly comprises a wheel shell, an impeller connected with a rotor is arranged in the wheel shell, an oil inlet is further formed in the wheel shell, and an oil outlet communicated with an inner cavity of the support is formed in the upper end cover.

A dual fuel system (24) includes: a first pressurized fuel reservoir (26); a first fuel pump (28) fluidly connected to the first pressurized fuel reservoir; a second pressurized fuel reservoir (30); and a second fuel pump (32) including a pump outlet (34) fluidly connected to the second pressurized fuel reservoir, a pumping chamber (36), an actuating fluid inlet (38) fluidly connected to at least one of the first fuel pump or the first pressurized fuel reservoir, and at least one pumping element (40). The first fuel pump may at least sometimes have a surplus capacity to provide pressurized first fuel for actuating the second fuel pump. The at least one pumping element may include a supercharger or step-down plunger such that a flow rate of the second pressurized fuel from the second fuel pump differs from a flow rate of the first pressurized fuel from the first fuel pump as an actuating fluid for the second fuel pump. Related apparatus and methods are also disclosed.

The invention relates to a method for controlling an electric drive chain (1) of an aircraft fuel pump, the method comprising: receiving (202) a pair of speed and mechanical torque setpoints for an electric motor (2), receiving (204) a maximum voltage setpoint by a direct current high voltage power supply (3), calculating (206) a minimum voltage required at an input of an electric inverter (5) for the pair of setpoints, and controlling the electric drive chain (1) of the aircraft fuel pump. Calculating (208) the loss in the electric drive chain (1) in a voltage range between the minimum voltage and a maximum voltage, the maximum voltage corresponding to said maximum voltage setpoint, selecting (210) an optimal voltage to be applied to the input of the electric inverter (5), the optimal voltage corresponding to the voltage with the lowest loss in the electric drive chain (1), and applying the optimal voltage to the input of the electric inverter (5). And calculating (212) a duty cycle to be applied to the buck converter (6) as a function of the selected optimal voltage.

The fuel pump guide rod press-fitting device comprises a bottom plate, an upper cover seat is arranged on the bottom plate in a sliding mode, an upper cover groove used for containing an upper cover is formed in the upper cover seat, a guide rod seat and a lining seat are arranged on the side, in the sliding direction of the upper cover seat, of the bottom plate, and a first driving cylinder is arranged on the side, away from the guide rod seat, of the lining seat of the bottom plate. A push plate is arranged at the end of a piston rod of the first driving cylinder, a plurality of ejector rods matched with the guide rods are arranged on the push plate, a filter screen groove used for bearing the filter screen frame is formed in the push plate, and a second driving cylinder is arranged on the side, away from the guide rod base, of the upper cover base of the bottom plate. The ejector rod and the filter screen frame are simultaneously driven through the first driving cylinder, synchronous operation of pressing the guide rod into the upper cover and pressing the filter screen frame into the lining is achieved, press fitting of the breather valve is synchronously completed through the second driving cylinder, three independent procedures are integrated on the same equipment to be synchronously completed, the assembling efficiency and the assembling precision are greatly improved, the structure is compact, operation is convenient and fast, and cost is low. The positioning is reliable.

This can suppress the occurrence of water hammer within the cylinder. [Solution] The control device 90 of the internal combustion engine 1 controls the internal combustion engine 1, which includes a fuel pump 16 that pressurizes fuel and an injector 15 that supplies fuel into the cylinder 4 by injecting the fuel pressurized from the fuel pump 16. The control device 90 is configured to stop the operation of the fuel pump 16 when the degree of discrepancy between the output timing of a signal output from a knocking sensor 48, which is a sensor that detects the vibration state of the internal combustion engine 1, and the output timing of an injection command signal that drives the injector 15, is greater than a predetermined degree.

The utility model provides a kind of high-efficiency heating electromagnetic automobile fuel pump, including pump shell, piston core and electromagnetic coil winding component being arranged in pump shell, electromagnetic coil winding component includes coil holder and enameled wire around the outside of coil holder, enameled wire is directly around the outside of winding tube piece of coil holder or indirectly around the outside of winding tube piece of coil holder by insulating spacer, it further includes several winding assembly, winding assembly is arranged on winding tube piece and can increase the winding outer diameter of winding tube piece, the outer periphery of winding tube piece is provided with several positioning components distributed in the length direction of winding tube piece, and positioning component is used to quickly limit the assembly position of winding assembly on winding tube piece.The utility model has the beneficial effect that the position of the winding space of enameled wire can be increased more, so that the overall winding number of turns is more, the enameled wire length is longer, a stronger electromagnetic force can be obtained, so that the heating effect is faster.

The invention provides a two-stroke air entrapment direct injection methanol engine. The two-stroke air entrapment direct injection methanol engine comprises an air cylinder body crankcase assembly, a crankshaft assembly, an engine oil lubricating assembly, an air inlet assembly, an oil supply assembly, a starting assembly, an air pump assembly and a control assembly. According to the application, the methanol use environment is met by adopting the design of internal preheating and combustion chamber preheating of the special fuel pump for methanol and heat energy generated by air compression in the fuel rail, and fuel atomization is promoted by gas pressure and high-speed flow generated by air compression of the direct-connected air pump assembly through a gas-entrained injection technology; meanwhile, uniform mixing of gas and fuel oil is enhanced, homogeneous combustible mixed gas is more easily formed in the combustion chamber, the first-stage fuel oil pump and the second-stage fuel oil pump are connected in series, and the stability of the using pressure of methanol fuel oil is effectively guaranteed; according to the preheating function, the engine can rapidly enter the optimal working temperature in the low-temperature environment during low-temperature starting and low-temperature operation, and therefore the emission performance and the working performance of the engine are improved.

The utility model relates to the technical field of automobile part positioning, and discloses an angle positioning tool for an oil inlet pipe joint of a high-pressure fuel pump, which comprises a tool bottom plate, the bottom edge of a positioning side plate is fixedly connected with the tool bottom plate, and the surface of the positioning side plate is provided with an avoiding through hole along the thickness direction. A plurality of positioning pins matched with positioning holes in the end face of the fuel pump are arranged on the surface of the positioning side plate around the avoiding through hole. The push-pull type pressing device is installed on the surface of the tool bottom plate, the push-pull type pressing device and the positioning side plate are oppositely arranged to form a limiting area of the fuel pump, and the push-pull type pressing device is used for selectively applying clamping thrust to the fuel pump to the limiting area; the limiting rod is installed on the surface, close to the limiting area, of the tool bottom plate and used for positioning before the fuel pump pipe joint is tightened according to the preset angle, accurate positioning and fixing of a fuel pump are achieved through the tool, displacement or loosening of the fuel inlet pipe joint when the fuel inlet pipe joint is greatly impacted by the torque of a tightening gun is avoided, and the percent of pass of installation of the fuel inlet pipe joint is guaranteed.

The invention relates to a fuel pump comprising: a pump body (1); a bushing (4) accommodated in a recess (10) in the pump body (1), the recess (10) opening at one end toward the outside of the pump body (1) and at the other end into a compression chamber (2); and a piston (3) translationally movable in the bushing (4) for compressing fuel in the compression chamber (2), the bushing (4) being tightly mounted in the recess (10) by means of two bulges (41, 42) protruding from a cylindrical outer surface of the bushing (4), the pump being characterized in that a first of the bulges (41) at a first end (43) of the bushing (4) on the compression chamber (2) side is located at a distance from the end of the bushing (4) of between 20% and 40% of the length of the bushing (4).

The invention discloses a hybrid power turboshaft engine and a working method, the engine comprises a core machine system and a fuel cell power supply system, and the core machine system comprises an air inlet channel, an air compressor, a main combustion chamber, a gas turbine and a power turbine; the fuel cell power supply system comprises a liquid ammonia storage tank, a fuel pump, a liquid ammonia decomposer, a pressure reducing valve, a heat exchanger and a proton exchange membrane fuel cell. According to the invention, a hybrid power form of combining a turbine power system and a fuel cell power system is adopted, so that the output power of the turboshaft engine is ensured, and meanwhile, the proton exchange membrane fuel cell provides electric energy for airborne electric equipment of the engine; the problems that the electric power requirement of an existing turboshaft engine is gradually improved, power of storage batteries such as lithium batteries is insufficient, and electric power is difficult to extract from a power turbine are solved. Meanwhile, the ammonia working medium serves as power generation fuel, the energy conversion efficiency of the aviation turboshaft engine is improved, and energy consumption is reduced.

The utility model discloses a diesel engine timing system transmission structure with an oil-resistant belt and a diesel engine. The diesel engine timing system transmission structure comprises a driving wheel. The driving wheel comprises a driving wheel and a driving gear coaxial with the driving wheel; the air compressor gear and the crankshaft gear are meshed with the driving gear, the idle gear is meshed with the crankshaft gear, and the fuel pump gear and the oil pump gear are meshed with the idle gear. The timing oil-resistant belt is used for realizing transmission of the driving wheel and the driven wheel; and the tensioner is used for tensioning the timing oil-resistant belt. The wet type timing oil-resistant belt is adopted to achieve transmission, and noise, friction loss, weight, transmission efficiency, oil consumption, emission and the like are obviously improved.

A liquefied petroleum (LP) gas fuel system includes a fuel source to store a liquid LP gas and a fuel supply system to draw the liquid LP gas from the fuel source and selectively deliver a vapor LP gas and the liquid LP gas into a plurality of cylinders of an internal combustion engine. The fuel supply system includes liquid LP gas injectors, vapor LP gas injectors, a fuel pump to displace the liquid LP gas fuel from the fuel source to the liquid injectors, and a fuel pressure regulator to deliver the vapor LP gas to the vapor injectors. The fuel system includes a controller to actuate the fuel pressure regulator to deliver the vapor LP gas to the vapor injectors and actuate the fuel pump to deliver the liquid LP gas to the liquid injectors.

A fuel pump (20, Fig. 3) for a fuel injector of an internal combustion engine, the pump comprising a housing 30 provided with an axial bore (32, Fig. 3) and a piston 80 slidably arranged in the bore w

To prevent vapor lock in a high-pressure fuel pump delivering LPG in a liquid-phase to fuel injectors that inject liquid-phase LPG into the combustion chamber of an internal combustion engine, a fuel system is configured to generate a continuous flow of LPG through the low-pressure side of the high-pressure fuel pump, with a return connection positioned to preferentially direct gaseous-phase LPG back to the fuel tank. A regulating valve in the return line maintains a predetermined fuel pressure at the inlet side of the high-pressure pump, which reduces fuel vaporization issues within the high-pressure pump.

The application discloses a kind of integrated fuel pump power supply voltage dynamic compensation method and system, it is related to voltage regulating field, comprising: obtaining the real-time operating parameter of fuel pump, at least including load current, speed feedback value and power supply line impedance;Based on the real-time operating parameter, through the voltage drop prediction model of pre-training, generate predicted voltage drop value;According to the predicted voltage drop value and power supply end reference output voltage, calculate dynamic compensation coefficient;Through the dynamic compensation coefficient, feedforward compensation is carried out to power supply voltage, generate compensated drive voltage, and with the compensated drive voltage control fuel pump operation.The application solves the problem that the power supply voltage fluctuation of fuel pump in the prior art is too large, which leads to unstable operation of fuel pump and reduced performance.

This utility model discloses a quick-install automotive fuel pump bracket, including a positioning cylinder. A fixing plate is fixedly connected to one side of the outer surface of the positioning cylinder, and an opening is provided on the other side of the positioning cylinder. A plug-in cylinder is fixedly connected to the upper end of the positioning cylinder. A connecting pipe is slidably installed at the lower end of the inner part of the positioning cylinder. A positioning seat is fixedly connected to the upper end of the connecting pipe. A positioning groove is provided on the upper surface of the positioning seat. A sealing ring is fixedly connected inside the positioning groove. A pump body is threaded inside the positioning groove. A fixing pipe is fixedly connected to the upper end of the pump body. The fixing pipe is inserted into the inside of the plug-in cylinder. A hinge seat is provided on one side of the outer surface of the positioning cylinder. A clamping semi-cylinder is hinged to one side of the hinge seat. The clamping semi-cylinder is clamped to the side of the opening. A fixing block is fixedly connected to one side of the clamping semi-cylinder, which facilitates clamping and fixing after closing. It is convenient, efficient, stable, and easy to use in combination.

The utility model relates to the technical field of high-pressure fuel pump seat machining, and particularly discloses a machining device for a high-pressure fuel pump seat, which comprises a fixed plate and a base plate which are mounted on a workbench, the fixed plate is connected with the base plate through an electric push rod, the base plate is connected with a servo motor and a sliding block, and the servo motor is connected with the sliding block through a threaded rod. The surface of the sliding block is connected with a soft plate through a connecting column. The high-pressure fuel pump fixing device has the advantages that the base plate and the sliding block are moved through the servo motor and the electric push rod, the soft plate firstly makes contact with a high-pressure fuel pump, the size of the high-pressure fuel pump is determined, and finally the high-pressure fuel pump is fixed through the sliding block and the soft plate together, so that the high-pressure fuel pumps of different sizes are fixed through the device. And subsequent processing is facilitated.

An armature is disclosed for use in an armature assembly associated with actuation of a valve, such as for fuel injectors, fuel cells, and / or fuel pumps. The armature includes a body having a first end with a flange and a shaft extending from the flange to a second end of the body. The second end includes a recessed surface configured to reduce stress on the armature upon impact. The armature can be fabricated from a lower strength material that is highly permeable, reducing residual magnetism in the armature to help de-latching and reduce end of injection delays.

A constant-flowrate fuel pump, comprising a pump body, a driving assembly and, arranged on the pump body, a fuel inlet pipe and fuel outlet pipes. The pump body is provided with a chamber, the driving assembly being arranged in the chamber and used for sucking fuel into the chamber or discharging the fuel from the chamber. A first end of the fuel inlet pipe is provided with a fuel inlet for the fuel to flow in; the wall of the fuel inlet pipe is provided with a fuel inlet hole leading to the chamber, the fuel entering the fuel inlet pipe via the fuel inlet and being sucked into the chamber via the fuel inlet hole. The fuel outlet pipes are arranged on a side of the fuel inlet pipe and are spaced apart from each other; a first end of each fuel outlet pipe is provided with an fuel outlet for the fuel to flow out; the wall of each fuel outlet pipe is provided with an fuel outlet hole leading to the chamber; the fuel in the chamber is discharged into the fuel outlet pipes via the fuel outlet holes, and is discharged by means of the fuel outlets of the fuel outlet pipes. On the basis of a target flowrate of the fuel pump, the diameter of the fuel inlet hole is less than a preset diameter, the target flowrate and the preset diameter satisfying a relationship between flowrates and diameters of the fuel inlet hole.

The invention relates to the technical field of fuel system oil pressure adjustment. The invention discloses a constant-pressure fuel oil plunger pump high-pressure valve element oil filter mechanism which comprises a valve sleeve, an axial hole channel is formed in the valve sleeve, an oil distribution valve ejector rod is arranged in the axial hole channel, and a control gap is formed between the oil distribution valve ejector rod and the inner wall of the axial hole channel; an oil way hole A and an oil way hole B which are through in the radial direction are formed in the outer wall of the valve sleeve, corresponding stepped holes are formed in the inner wall of the valve sleeve, and the stepped holes communicate with the oil way hole A and the oil way hole B correspondingly. A plug is arranged at one end of the valve sleeve, and a control cavity is arranged between the valve sleeve and the plug. According to the invention, the cleanliness of the working medium entering the high-pressure valve gap in the fuel pump is improved, the effect of preventing solid particle pollutants from entering the valve gap to cause the inflexible clamping motion of the valve can be achieved, and the stable, efficient and accurate control of the high-pressure valve is effectively ensured.

The invention provides a high-pressure fuel cooperative control system based on multi-gear rail pressure sensing, which is characterized in that a variable frequency motor is in transmission connection with a rotor type high-pressure oil pump through a coupler, an oil outlet of the rotor type high-pressure oil pump is communicated with a pressure-stabilizing common-rail pipe through a common-rail oil inlet pipe, and the rotor type high-pressure oil pump is further communicated with a fuel tank through a first oil return pipe; the pressure-stabilizing common-rail pipe is connected with the oil sprayer through a high-pressure oil pipe A mechanical control valve is arranged at one end of the pressure stabilizing common rail pipe and communicated with the fuel tank through a second oil return pipe. An electromagnetic valve is arranged at the other end of the pressure stabilizing common rail pipe and is communicated with the fuel tank through a third oil return pipe; a pressure storage cavity is formed in the pressure stabilizing common rail pipe, a plurality of independent channels are formed in the pressure storage cavity, each channel is correspondingly provided with a rail pressure sensor, a circulation valve is arranged at an input port of each channel, and the circulation valves and the rail pressure sensors are electrically connected with a controller. Accurate measurement within a large pressure range can be achieved, and the stability of the fuel flow of the fuel injector is guaranteed.

The utility model discloses a kind of sliding bearing press-fit aids for fuel pump, including hollow base;Sliding mandrel, it is axially slidably installed in the base, upper end protrudes the upper end surface of base and is equipped with guide mandrel;Edge cutting pin, vertically set in the upper end surface of base;Press head, sleeve set on the guide mandrel, with sliding bearing mounting portion and press-fit portion, the sliding bearing mounting portion is equipped with the plunger spring of radial installation, the end of this plunger spring is equipped with the locating steel ball that can elastically expand and contract, for forming locating cooperation with the oil inlet hole of sliding bearing;Spring seat, fixedly connected in the lower end of the base;Compression spring, lower end abuts on spring seat, upper end abuts the sliding mandrel;Among them, the coaxial cooperation of guide mandrel and press head press-fit portion, the plug-in cooperation of locating steel ball and oil inlet hole jointly constitute double locating structure in press-fit process.The reliability, scrap rate and efficiency problem of traditional manual assembly are solved.

A fuel system for a hydrogen fuelled gas turbine engine includes a main hydrogen fuel storage unit, a hydrogen fuel pump configured to be supplied with hydrogen from the hydrogen storage unit, a hydrogen fuel preheater configured to be supplied with high pressure hydrogen from the hydrogen fuel pump, and configured to supply heated gaseous hydrogen to a combustor of the gas turbine engine, and a hydrogen priming tank configured to store compressed gaseous hydrogen and to deliver gaseous hydrogen to at least the hydrogen fuel pump and preheater. The fuel system comprises a high-pressure gaseous hydrogen fuel offtake downstream in hydrogen fuel flow of the fuel pump in fluid communication with the hydrogen priming tank, and configured to fill the hydrogen priming tank with high pressure gaseous hydrogen.