536results 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 first magnetic yoke (641) is capable of forming a magnetic circuit (Mc1) on the pressurized chamber side relative to the coil (60) in the axial direction of the coil (60) by energizing the coil (60). The second magnetic yoke (645) is capable of forming a magnetic circuit (Mc1) on the opposite side of the pressurized chamber relative to the coil (60) in the axial direction of the coil (60) by energizing the coil (60). The first connecting portion (661) connects the coil assembly (502) to the fixed core (57) on the opposite side of the coil assembly (502) from the pressurized chamber. The second connecting portion (671) connects the coil assembly (502) to the cylindrical component (51) on the pressurized chamber side of the coil assembly (502).

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 valve member (25, 125) for a fuel injector control valve comprising a unitary metal body with a threaded bore therethrough concentric with a cylindrical outer surface (42); wherein the cylindrical outer surface (42) has a composite ring (26); wherein a portion of the composite ring (26) is defined by an annular valve surface (43); wherein the composite ring (26) is located in a small diameter segment (46) of the cylindrical outer surface (42); wherein an additional ring is defined by a large diameter segment (47) of the cylindrical outer surface (42); wherein the composite ring (26) has a small ring (45) which opens into a large ring (44); wherein a center of the small ring (45) is offset with respect to a center of the large ring (44); and wherein the small ring (45) has a U-shaped cross-section.

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.

The utility model discloses a tappet-free body type oil feed pump and an oil injection system, and relates to the technical field of oil injection systems, the tappet-free body type oil feed pump comprises a body with an oil cavity, the oil cavity at least comprises a first cavity body used for installing an eccentric cam assembly and a second cavity body used for installing an oil pumping assembly, the first cavity body is communicated with the second cavity body, and the first cavity body is communicated with the second cavity body. The oil pumping assembly comprises a plug sleeve installed in the body and a plunger movably connected in the plug sleeve, the plunger and the plug sleeve are elastically connected through an elastic piece, and the eccentric cam assembly makes contact with the plunger so as to jack up the plunger. Two large-mass parts, namely a tappet body and a spring lower seat, are omitted, so that the motion inertia caused by the unsprung mass of the plunger spring is effectively reduced, and the high-rotating-speed operation of the oil supply pump is favorably realized.

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.

Roller tappet (40) for a pump (1), in particular a high-pressure pump (1) for a high-pressure injection system for a motor vehicle for supporting a reciprocating pump piston (12) on a drive shaft (14), comprising a tappet body (8) for supporting a roller (46), a hollow-cylindrical roller (46), a bearing pin (52) arranged within the hollow-cylindrical roller (46) for supporting the roller (46), such that a radial bearing gap (38) is formed between the roller (46) and the bearing pin (52), a first lubricant channel (11a) formed in the tappet body (8) for supplying a lubricant to a first axial end region (29) of the roller (46) and / or the bearing pin (52), a second lubricant channel (11b) formed in the tappet body (8) for supplying a lubricant to a second axial end region (31) of the roller (46) and / or the bearing pin (52),wherein the roller tappet (40) comprises a movable actuator (2) for changing the flow cross-sectional area of the first and / or second lubricant channel (11a, 11b) in order to achieve a reliable supply of the volume flow (Q1) of lubricant conducted through the first lubricant channel (11a) and the volume flow (Q2) of lubricant conducted through the second lubricant channel (11b).

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.

The invention relates to the technical field of automobile accessories, in particular to a high-pressure pump for an automobile and a pressure self-adaptive adjusting method of the high-pressure pump. 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 a discharge port connector, 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 are arranged in the pump body. An extension rod is coaxially arranged at the lower end of the piston and is kept at the lowermost position through an outer spring frame, an outer spring seat and an outer spring; the pressure relief oil duct is communicated with the oil return duct and an inner cavity of the pump cover; the connecting oil duct is communicated with the inner cavity of the pump cover and the sliding sleeve cavity; the pressure self-adaptive adjusting method comprises the steps of oil inlet, compression oil discharge, overpressure oil drainage and pressure self-adaptive adjustment. According to the high-pressure pump for the automobile and the pressure self-adaptive adjusting method of the high-pressure pump, self-adaptive adjustment of the fuel pressure is conducted in real time; and the device is 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

High pressure pump (100) of a direct liquid fuel injection system of a dual-fuel internal combustion engine of a motor vehicle configured to burn a liquid fuel and a gaseous fuel, said high pressure pump (100) comprising a low pressure liquid fuel inlet (102), a high pressure liquid fuel outlet (104), a compression chamber (105), a low pressure chamber (106) and a plunger (108) movable in translation in the pump, the pump (100) further comprising an inlet and outlet valve (111, 112) of the compression chamber (105). The high pressure pump (100) includes a low pressure liquid fuel outlet (120) connected to the low pressure chamber (106) and configured to create a continuous flow of liquid fuel through the inlet valve (111) and the low pressure chamber (106) during operation of the engine with the gaseous fuel.Figure for abstract: Fig 3.

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.

A desmodromic mechanism (12) exhibits reciprocating motion of a pair of cam followers (22, 24) driven by a single cam (18). The mechanism (12) is useful in a fuel pump (10) that pressurizes a liquid for delivery to a fuel rail of a combustion engine. A desmodromic lever (20) is symmetric about its rotational axis (B) and maintains continuous contact between cam lobes (30) and cam followers (22, 24) for the entirety of each rotational cycle. The mechanism (12) is particularly useful in multi-piston pumps required to deliver higher than normal volumes of liquid fuel, as is the case with low energy density alternatives to diesel fuel.

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.

A fuel system for an internal combustion engine includes a low-pressure fuel pump and a pressure control valve. The pressure control valve is located at the inlet of the low-pressure fuel pump to regulate the fuel pressure and flow in the system.

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.

Provided is a fuel pump capable of improving volumetric efficiency. The fuel pump of the present invention includes: a pump body 1 in which a pressurizing chamber 11 is formed; a plunger 2 that reciprocates in the pressurizing chamber 11; a discharge valve mechanism 8 that discharges fuel in the pressurizing chamber 11 to a discharge chamber 87; and a relief valve mechanism 4. The relief valve mechanism 4 opens when a difference between a pressure of the fuel in the discharge chamber 87 and a pressure of the fuel in the pressurizing chamber 11 exceeds a set value, and returns the fuel in the discharge chamber 87 to the pressurizing chamber 11. As viewed from a first direction along which the plunger 2 reciprocates, the discharge valve mechanism 8 and the relief valve mechanism 4 are disposed in a direction where the moving directions of the respective valve elements 82, 43 intersect with each other. The relief valve mechanism 4 is disposed at a position that overlaps with the pressurizing chamber 11 in the first direction and in a second direction that is a moving direction of the valve element 43 of the relief valve mechanism 4.

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.