355results about "Fuel injecting pumps" patented technology

A fuel injection system for an engine of a vehicle includes a throttle body and an elastomeric injection manifold coupled to the downstream end of the throttle body. The injection manifold defines a fuel injector socket. The fuel injection system also includes a fuel injector receivable by the fuel injector socket of the injection manifold and a fuel rail fluidly coupled to the fuel injector. The fuel rail supplies fuel to the fuel injector.

The present invention addresses the problem of providing a fuel supply system capable of appropriately controlling the amount of fuel supplied from a high-pressure pump to an in-cylinder injection valve of an engine in accordance with a change in the operating state of the engine. A fuel supply system is provided with: a high-pressure pump for supplying fuel stored in a fuel tank from a low-pressure fuel passage to an in-cylinder injection valve of an engine; and a control device that controls the high-pressure pump, the high-pressure pump including: a pressurizing chamber that pressurizes fuel in accordance with reciprocating motion of a plunger in conjunction with rotation of the engine; a suction passage communicating the low-pressure fuel passage and the pressurizing chamber; a discharge passage that communicates with the pressurizing chamber and the in-cylinder injection valve; an electromagnetic suction valve that adjusts the amount of fuel sucked into the pressurizing chamber from the low-pressure fuel passage; and a discharge valve which is provided in the discharge passage and which permits the flow of fuel from the pressurizing chamber side to the in-cylinder injection valve side but restricts the flow in the opposite direction.

A dual fuel system includes a fuel injector having a fuel pressurization plunger, and a fueling control unit structured to determine a fuel bulk modulus term based upon a volume change value (dV) and a pressure change value (dP) for a fuel pressurized in the fuel injector. The fueling control unit is further structured to determine fuel injector control commands by way of map lookups on fueling maps selected on the basis of the fuel bulk modulus term. Related apparatus and methodology are also disclosed.

A common rail system for a fuel injection system of an internal combustion engine, the common rail system comprising: a high pressure pump for receiving fuel from a fuel tank; at least one fuel injector for delivering fuel to the internal combustion engine; a common rail for receiving fuel from the high pressure pump through a flow path of the common rail system that connects the high pressure pump to the common rail, the common rail comprising a fuel reservoir in fluid communication with a common rail inlet and in fluid communication with the one or more fuel injectors; and a filter provided in the flow path. The filter is configured to filter fuel so as to prevent particulate matter from entering the common rail. The common rail system comprises only one filter.

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 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.

To provide a fuel injection pump for efficiently recovering fuel oil which leaks into a gap between a plunger and a barrel, to the outside of the barrel.SOLUTION: The fuel injection pump for a diesel engine including the plunger and the barrel includes a plurality of plunger grooves formed in the outer peripheral side face of the plunger, a recovery passage formed in the barrel to recover the fuel oil which leaks into a gap between the plunger and the barrel, from the barrel, and a recovery groove formed in the inner peripheral side face of the barrel in communication with the recovery passage, the recovery groove being formed in a lower position than the plurality of plunger grooves at the time the plunger reciprocating up and down is at a bottom dead center.SELECTED DRAWING: Figure 2

The present disclosure relates to filter media containing antimicrobial compounds, methods for making the filter media, filter elements, filter systems, and methods for filtering water in the combustion chamber of an internal combustion engine using the filter media.

A high-power fuel injection pump plunger and barrel assembly lubricating structure comprises a fuel injection pump body, a plunger seat is connected to the fuel injection pump body, an oil inlet hole and an oil outlet hole are formed in the two sides of the upper portion of the plunger seat respectively, a plunger hole is formed in the middle of the plunger seat, a plunger and barrel assembly is arranged in the plunger hole, an annular groove is formed in the side face of the plunger hole, and an oil storage ring is arranged in the annular groove. An oil injection needle hole is machined in the plunger seat and communicated with the oil storage ring, and an oil injection hole is machined in the oil injection pump body and communicated with the oil injection needle hole. Compared with the prior art, according to the high-power fuel injection pump plunger and barrel assembly lubricating structure, the oil storage ring is arranged in the plunger hole, long-time oil storage is achieved through the oil storage ring, meanwhile, the oil injection opening is formed in the side face of the pump body, and lubricating oil can be injected conveniently.

A fuel pump (20) for a fuel injector of an internal combustion engine, the pump (20) comprising a housing (30) provided with an axial bore (32) and a piston (80) slidably arranged in the bore (32). The bore (32) defines a lower end (34) through which the piston is received, an upper end (36) opposite the lower end (34), a side wall (35) that extends between the lower (34) and upper ends (36), and a compression chamber (40) located that incorporates the upper end (36) of the bore (32). The housing (30) is provided with an inlet (42) that opens into the compression chamber at the upper end (36) of the bore (32), and an outlet (44) that opens into the compression chamber (40) at a side wall (35) of the bore (32). The piston (80) is configured to slide reciprocally between a lower position where fuel at low pressure enters the compression chamber (40) via the inlet (42) and an upper position where fuel in the compression chamber (40) is pressurized before being expelled via the outlet (44). The piston (80) comprises a dilation region (88) arranged at an upper end (84) of the piston (80), and a pressure relief region (90) arranged below the dilation region (88). The pressure relief region (90) comprises a pressure relief means (94), and the dilation region (88) comprises a dilation means (92) configured to dilate in response to a pressure differential between the compression chamber (40) and the pressure relief region (90).

The application provides a methanol engine with an internal direct injection structure applied to the field of methanol engines, wherein the valve is directly installed in the interior of the cylinder, the methanol fuel can be directly atomized and injected in the interior of the cylinder, loss caused by injection of the methanol fuel in the intake pipe can be avoided, the first fuel injection is performed when the piston moves from the top dead center to 1 / 2 of the total stroke, the second fuel injection is performed when the piston moves to the bottom dead center position, the two fuel injections are performed in stages, the mixing effect of the two fuel injections can be enhanced by the disturbance of the air flow in the cylinder, the methanol fuel combustion efficiency is improved to a certain extent, fuel loss in the starting process of the methanol engine is reduced, the methanol fuel is fully combusted, the working efficiency is effectively improved, and the methanol engine is more economical and environmentally friendly.

A gear sleeve pull rod structure of an oil injection pump comprises a connecting sleeve, a connecting hole is machined in the connecting sleeve, a connector is machined at the upper end of the connecting sleeve, an outer gear sleeve is arranged on the outer side of the connector in a sleeving mode, a fixing hole matched with the connector is machined in the middle of the outer gear sleeve, teeth are machined on the outer side of the outer gear sleeve, and a pressing plate is arranged at the upper end of the outer gear sleeve. A through hole communicated with the connecting hole is machined in the middle of the pressing plate, the periphery of the through hole is fixed to the connector through screws, a pull rod is arranged on the side face of the outer gear sleeve, teeth are machined on the left side and the right side of the pull rod, and the teeth on the pull rod are meshed with the teeth on the outer gear sleeve. Compared with the prior art, according to the gear sleeve and pull rod structure of the fuel injection pump, after the gear sleeve and the pull rod are abraded, the outer gear sleeve is replaced, the pull rod can be reused after the position is changed, the whole gear sleeve and the whole pull rod do not need to be replaced, and cost is saved.

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 application relates to the technical field of automobile parts, in particular to a high-pressure pump for automobiles and a pressure self-adaptive adjusting method thereof. The high-pressure pump comprises a pump body and a pump cover. The pump body is internally provided with a piston cavity, a piston, an oil inlet channel containing an inlet controller, an oil discharge channel containing an oil discharge valve, a distribution cavity containing an oil discharge joint, an oil distributor and a thrust bearing, an oil return channel containing a pressure relief valve, a pressure relief oil channel, a connecting oil channel and a sliding sleeve cavity. The lower end of the piston is coaxially provided with an extension rod, and the extension rod keeps the lowest position through an outer spring frame, an outer spring seat and an outer spring. The pressure relief oil channel and the oil return channel are communicated with the inner cavity of the pump cover. The connecting oil channel is communicated with the inner cavity of the pump cover and the sliding sleeve cavity. The pressure self-adaptive adjusting method comprises oil inlet, compression oil discharge, overpressure oil discharge and pressure self-adaptive adjustment. The high-pressure pump for automobiles and the pressure self-adaptive adjusting method thereof can realize real-time adaptive adjustment of fuel pressure, and are suitable for engines under various fuel pressure working conditions.

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

The present invention is provided to make stress generated between fixing portions of two members smaller than or equal to a fatigue limit without increasing sizes of parts or increasing the processing difficulty. In a two-member fixing structure of the present invention, a second member 6 includes a curved surface portion 6d with one end 6a1 of an outer circumferential surface 6a in a direction along a center line 1A as a start point 6d1. The first member 1 includes a pressed surface 1g formed by pressing a peripheral edge portion 1c2 of an inner circumferential surface 1c1, and a plastically deformed portion 1x1 plastically deformed radially inward of the outer circumferential surface 6a of the second member 6. A circle C1 intersects with the curved surface portion 6d, when the circle C1 is drawn with a radius being a length R1 of a line segment LS1 connecting the start point 6d1 and a radially outer end point 1g1 of the pressed surface 1g, while the radially outer end point 1g1 of the pressed surface 1g is the center of the circle C1. An angle θ1 formed between a tangent line LS2 that is in contact with the curved surface portion 6d at an intersection point CP between the circle C1 and the curved surface portion 6d and a line LS3 perpendicular to the center line 1A is larger than 0°.

Disclosed is a fuel pump assembly, or an upgrade kit for a fuel pump that includes a fuel pump adapter configured to fluidly couple at least one hose to the fuel pump. Also included is at least one fuel pickup device having a first locating magnet disposed on an exterior surface, where the at least one fuel pickup device is fluidly coupled with the fuel pump adapter via the at least one hose. In certain examples, a second locating magnet is also included, and disposed on an external surface of a fuel tank configured to maintain a location of the fuel pickup device with respect to the fuel tank.

The Company provides fuel supply systems that supply high-pressure gas to large two-stroke compression-ignition internal combustion engines. The fuel supply system includes a feed pipe (9) connecting the outlet of a liquefied gas storage tank (8) to the inlet (40) of a high-pressure pump, a transfer pipe (50) connecting the outlet of the high-pressure pump to the inlet of a high-pressure vaporizer (14), and a supply pipe (18) connecting the outlet of the high-pressure vaporizer to the inlet of an engine's fuel injection system. The high-pressure pump includes two or more independently operating cryogenic pump units (41, 42, 43). Each pump unit includes a pump piston (62) slidably disposed in a pump cylinder (61) and a drive cylinder (45) having a hydraulic drive piston (46) that drives the pump piston.

The purpose of the present invention is to increase the pressure of fuel while reducing an increase in the maximum lift amount of a cam and deterioration of a fuel injection ability. This cam for use in a fuel injection pump that increases the pressure of fuel supplied into a fuel supply chamber by an axial movement of a plunger. The cam includes a first cam surface that causes an increase rate of an axial speed of the plunger when the cam rotates at a constant speed, in a pre-stroke period until the plunger increases the pressure of the fuel in the fuel supply chamber, to be a first increase rate, and a second cam surface that causes the increase rate of the axial speed of the plunger when the cam rotates at the constant speed, in a pressure increasing period that is a period from a start of increasing the pressure of the fuel in the fuel supply chamber by the plunger, to be a second increase rate, wherein the first increase rate is set higher than the second increase rate.

The utility model relates to the technical field of electronic control fuel injection systems, in particular to a monoblock pump type electronic control fuel injection system which comprises an electronic control monoblock pump and a cam, a protective cover is arranged on the surface of the electronic control monoblock pump, the protective cover is connected with a connecting block in a sliding mode, and an oil containing groove is annularly formed in the lower inner wall of the protective cover. An oil discharge channel is arranged on the lower inner wall of the oil containing groove and communicated with a pipeline, one end of the pipeline is communicated with an oil storage device, a flange is arranged on the surface of the protective cover, and a plurality of adjusting devices are arranged on the flange. By means of the adjusting device, the installation gap between the electronic unit pump and the cam can be conveniently and rapidly adjusted; if fuel oil leaks from the electronic unit pump, one part of fuel oil can drop onto the connecting block through the plunger, and excessive fuel oil can flow into the oil containing groove; the other part slides into the oil containing groove through the inner wall of the protective cover; and the fuel oil does not drop on the cam to pollute the cam.

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.

An inlet metering valve (IMV) assembly for an engine fuel pump (10) of a gasoline direct-injection (GDI) system, comprising an IMV cartridge assembly and a solenoid assembly (28), the IMV cartridge assembly comprising an IMV valve body (42) and a pole piece (44), the pole piece (44) comprising a peripheral wall (47) and a longitudinal cavity, the longitudinal cavity containing a guide (62), an armature (60) and a metering pin (68), the metering pin (68) being fixed to the armature (60), wherein the peripheral wall (47) of the pole piece (44) comprises a groove comprising a first slope-shaped portion (70), a second slope-shaped portion (71) and a narrowed portion (72), the narrowed portion (72) forming an intersection connecting the first slope-shaped portion (70) to the second slope-shaped portion (71).

The present disclosure provides a control device for an internal combustion engine which is capable of reducing an overshoot of a fuel pressure in a common rail with respect to a target pressure. A control device 100 for the internal combustion engine includes an amount-of-injection control unit 110, and a pressure control unit 120. The pressure control unit 120 includes a feedback control unit 121, a discharge flow rate calculation unit 122, a discharge flow rate restricting unit 123, and an energization start angle calculation unit 124. The feedback control unit 121 calculates a target discharge flow rate FRt of a fuel discharged from a high-pressure fuel pump to a common rail, based on the pressure deviation ΔP between a fuel pressure Pf and a target pressure Pt. The discharge flow rate calculation unit 122 calculates a balanced discharge flow rate FRb by increasing or decreasing the target discharge flow rate FRt such that the target discharge flow rate FRt is balanced with the flow rate of the fuel flowed out from the common rail by being injected through injectors. The discharge flow rate restricting unit 123 outputs the restricted discharge flow rate FRr having its upper limit corresponding to the balanced discharge flow rate FRb, based on the pressure deviation ΔP. The energization start angle calculation unit 124 calculates an energization start angle θes, which is a phase angle of the reciprocating motion of a plunger at the start of energization of the electromagnetic valve in the high-pressure fuel pump, based on the restricted discharge flow rate FRr.

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 invention belongs to the technical field of high-pressure oil pumps, and particularly relates to a composite plunger type high-pressure oil pump which comprises a plunger sleeve, an oil inlet valve seat is arranged in an inner cavity of the plunger sleeve, a sealing ring is arranged between the plunger sleeve and the oil inlet valve seat, the input end of the plunger sleeve is connected with an electromagnetic valve assembly, and the output end of the plunger sleeve is connected with an oil outlet valve seat. The extrusion assembly is used for enabling the sealing ring to be in close contact with the plunger sleeve, and the extrusion assembly is arranged on the oil inlet valve seat; the extrusion assembly comprises a first annular groove, and the first annular groove is formed in the oil inlet valve seat and arranged in an inclined mode. Through the arrangement of the extrusion assembly, when the sealing ring is abraded, the sealing ring can make close contact with the plunger sleeve, and then the use performance of the sealing ring can be prevented from being affected.

A pump-flange assembly process comprising the steps of: providing a pump (10) with a pump nose (10.1) defining a pump axis; providing a flange (12) comprising a first surface (12.1) and an opposite second surface (12.2) connected via a through-hole (14) defining a hole axis (X), the hole axis (X) defining a first direction (X1) and a second direction (X2) such that the first surface (12.1) faces towards the first direction (X1) and the second surface (12.2) faces towards the second direction (X2), wherein the flange (12) is pre-deformed along the hole axis (X), such that the first and second surfaces (12.1, 12.2) of the flange (12) diverge towards the first direction (X1) as their distance from the hole axis (X) increases; inserting the pump nose (10.1) through the flange hole (14) from the first direction (X1) towards the second direction (X2); welding the flange (12) onto the pump (10) from the second direction (X2), whereby the surfaces (12.1, 12.2) of the flange (12) diverge towards the second direction (X2) as their distance from the hole axis (X) increases.

A dual valve fuel metering system comprising a flow path defined between a fuel inlet (114) and a fuel outlet (116). The flow path includes a primary flow path (120) and a secondary flow path (122), wherein the fuel outlet is configured and adapted to be in fluid communication with at least one engine fuel manifold. A primary flow metering valve (102) configured and adapted to meter flow on the primary flow path. A secondary flow metering valve (104) configured and adapted to meter flow on the secondary flow path.

A pump comprising a check valve, which check valve comprises:an axially extending valve bore defined within a pump body of the pump and having an inner surface,a seat member defining an axially extending valve channel and having a mounting portion being press-fitted into the valve bore so that it engages the inner surface and a seat portion disposed proximal with respect to the mounting portion, the seat portion defining a seat surface around a proximal opening of the valve channel, wherein a pilot radius, which is a maximum radius of the seat portion, is at least 95% but less than 100% of valve-bore radius of the valve bore so that the seat portion is out of contact with the inner surface, anda valve member movable with respect to the seat member and engaging the seat surface in a closed position.

This utility model provides an oil pump body for a diesel internal combustion engine, relating to the technical field of oil pump bodies. It includes a pump body and an armature. The armature is centrally located within the pump body, and a magnet is fitted around the outer side of the armature's middle portion. A front fixed plate is located at the front end of the pump body, and a one-way valve is located in the middle of the front part of the front fixed plate. A front connecting sleeve is fixed to the front part of the inner sidewall of the pump body, and a first sliding groove is provided on the front part of the inner side of the front connecting sleeve, while a second sliding groove is provided on the rear part of the inner sidewall of the front connecting sleeve. A middle slider and a front slider are provided on the front part of the outer ring of the armature. The middle slider is rotatably connected to the first sliding groove, and the front slider is rotatably connected to the second sliding groove. This utility model ensures that both the front and rear parts of the internal armature are rotatably connected to the front and rear connecting sleeves, respectively, achieving front-to-back balance during high-speed rotation. This results in smoother and more stable operation of the internal structure, strengthens the pump body casing, and provides safety, explosion-proof protection, and robust reliability.

The invention relates to a high-pressure fuel pump (10) with an outlet valve (32) comprising a valve body (58) and a valve ball (38), wherein the valve body (58) has a sealing section (65) on which a sealing seat (68) is formed, which interacts sealingly with the valve ball (38). According to the invention, the valve ball (38) is designed as a hollow sphere.