1114results 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.

To provide a fuel pump and fuel injection system that can pressurize a plurality of kinds of fuels in a simple structure.SOLUTION: A fuel pump 10 comprises a first piston 16, a first pressure rising chamber 11, a second piston 21, and a second pressure rising chamber 12a. The first piston 16 is reciprocated by being pushed by a cam 13. The first pressure rising chamber 11 houses a first fuel to be pressurized by the first piston 16, and comprises a first discharge hole 18 for discharging the first fuel. The second piston 21 is reciprocated by being pushed by the first fuel pressurized by the first piston 16. The second pressure rising chamber 12a houses a second fuel to be pressurized by the second piston, and comprises a second discharge hole 23 for discharging the second fuel.SELECTED DRAWING: Figure 1

To provide a two-cycle internal combustion engine which can prevent the blow-through of an air-fuel mixture at scavenging, and can supply the air-fuel mixture which is adapted to an operation state of the engine into a combustion chamber.SOLUTION: A two-cycle internal combustion engine comprises: a fuel injection valve 25 for supplying fuel into a crank chamber 8; an intake passage 17 for sucking only air by negative pressure at an operation of a piston 4; and a scavenging passage 18 for making the crank chamber 8 and a combustion chamber 6 communicate with each other. An intake port 42 and the scavenging passage 18 communicate with each other via a piston groove 44, and air is sucked into the crank chamber 8 through the intake passage 17, the intake port 42, the piston groove 44, a scavenging port 14 and the scavenging passage 18. Then, air which passes through the intake passage 17 is introduced into the scavenging passage 18, and air which is stagnated in the scavenging passage 18 at a finish of air intake is involved in the scavenging.SELECTED DRAWING: Figure 4

A valve body of the electronic unit pump is provided with a first drainage channel and a second drainage channel which are communicated with a main oil channel, and a first electromagnetic valve used for controlling the first drainage channel to be connected and disconnected and a second electromagnetic valve used for controlling the second drainage channel to be connected and disconnected are installed on the valve body. The second electromagnetic valve is closed in a power-off state, and the second drainage channel is disconnected; and when the fuel pressure is higher than the set value, the second electromagnetic valve is opened in the power-off state, the second drainage channel is communicated for drainage, the second electromagnetic valve is closed in the power-on state, and the second drainage channel is disconnected. By controlling the opening and closing moments of the first electromagnetic valve and the second electromagnetic valve, the three-section fuel injection requirement of the engine in the diesel engine state of'pilot injection, main injection and post injection 'can be met, the fuel supply requirement of the micro-injection gas engine can also be met, and the engine can be restored to the full-power diesel engine state to operate after gas fuel is used up.

The utility model provides a unilateral support horizontal fuel pump assembly, which is characterized by comprising a pump body mounting seat, a pump body, a fuel pump body, a fuel pump body, a fuel pump body and a fuel pump body, the fuel pump is mounted on the pump body mounting seat; the supporting frame is movably connected to the side face of the pump body mounting base; the flange is located above the supporting frame and is fixedly connected with the supporting frame through a supporting rod; the fuel pump is connected with an oil suction pipeline and an oil outlet pipeline, the oil outlet pipeline is connected with the flange, the oil suction pipeline is arranged on the pump body supporting seat and matched with the sliding guide groove through a supporting frame, and the supporting frame slides along the sliding guide groove during installation so that the supporting frame and the pump body installation seat can be approximately horizontal. At the moment, the fuel pump is integrally installed in the ship body, and the fuel pump assembly of the structure can be smoothly installed in the fuel tank.

An electric GDI pump is configured to allow fuel being pumped to cool the electric motor and associated motor control / drive circuit, and cool and lubricate a drive region of a high-pressure pump before passing through an inlet check valve of the high-pressure pump. The rotational speed of an electric GDI pump is de-coupled from the rotational speed of the internal combustion engine. In such a fuel supply system, the quantity of fuel pressurized can be regulated by changing the rotational speed of the electric GDI pump. According to aspects of the disclosure an electric GDI pump is driven by a variable speed direct current motor having a motor housing with a fuel inlet and a motor drive shaft connected to a rotor. The electric GDI pump may incorporate a low-pressure pump driven by one end of the drive shaft and an eccentric drive driven by an opposite end of the drive shaft.

A high-pressure fuel injection pump plunger and barrel assembly comprises a plunger sleeve, the plunger and barrel assembly is arranged in the plunger sleeve, the plunger and barrel assembly comprises a plunger head and a connector, a mounting hole is machined in the bottom of the plunger head, one end of the connector is connected into the mounting hole, a storage space is reserved between the connector and the mounting hole, and lubricating oil is stored in the storage space. A vertical oil hole is formed in the connector and communicated with the storage space, a transverse oil hole is formed in the bottom of the vertical oil hole, an annular groove is formed below the mounting hole and communicated with the annular groove, and a plurality of oil outlet holes are evenly distributed in the periphery of the annular groove and lead to the outer side of the plunger head. Compared with the prior art, the plunger and barrel assembly of the high-pressure fuel injection pump adopts a split structure, the connector part can adopt a casting with lower cost, and meanwhile, lubricating oil is stored in the plunger head and flows out through the oil hole to lubricate the plunger head.

The invention relates to a method for predicting the fatigue life of an oil supply element of a high-pressure common-rail pump. The method comprises the following steps: acquiring the structural composition, load condition, failure form and stress analysis result of the oil supply element of the high-pressure common-rail pump of a diesel engine; key design parameters are obtained; carrying out single-factor test design and response surface test design; establishing a finite element model of the oil supply element, and obtaining stress distribution conditions of the oil supply element under different stress analysis results; solving the stress field finite element model, and recording a calculation result; obtaining single-factor regression analysis and response surface analysis of the key design parameters on the maximum equivalent stress of the key parts; under the same working condition, the stress level of the oil supply element is greatly reduced; predicting the fatigue life of the oil supply element of the high-pressure pump under different key parameter design values; predicting the maximum equivalent stress of the oil supply element under different key parameter design value combinations; and the research and development cost is greatly reduced.

Operating an engine system includes cold starting an engine, closing spill valves to pressurize fuel in a plurality of plunger cavities, opening injection valves in some of a plurality of fuel injectors to inject fuel into firing cylinders in an engine cycle, and opening spill valves in some of the plurality of fuel injectors while injection valves therein remain closed to bleed fuel to a lower pressure space in the engine cycle. The pressurization of fuel in the fuel injectors remaining closed parasitically loads the engine to increase a fuel burned amount hastening warm up and limiting misfire. Related apparatus and control logic is also disclosed.

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.

To provide control systems and control methods suitable for combination with power production systems and power production methods.SOLUTION: The control systems and control methods may be used with, for example, closed power cycles as well as semi-closed power cycles. The combined control systems and combined control methods and power production systems and power production methods can provide dynamic control of the power production systems and methods that can be implemented automatically based upon inputs received by controllers and outputs from the controllers to one or more components of the power production systems.SELECTED DRAWING: Figure 1

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 invention provides a control device for an internal combustion engine, which can simultaneously improve the stability and responsiveness of the transient response of the discharge pressure of a high-pressure fuel pump to a pressure target value. A control device (ECU 100) for an internal combustion engine is provided with a feedback control unit (110), a flow rate restriction unit (120), and an energization start angle calculation unit (130). A feedback control unit (110) outputs, as inputs, a pressure detection value (Pd) of a pressure sensor for fuel discharged from a high-pressure fuel pump to a fuel injection device and a pressure target value (Pt) of the discharge pressure of the high-pressure fuel pump, a pressure deviation ([delta] P) between the pressure detection value (Pd) and the pressure target value (Pt), and a flow rate target value (QT) of the discharge flow rate of the high-pressure fuel pump. A flow rate limiting unit (120) outputs a limited flow rate value (QL) in which the flow rate target value (QT) is limited, on the basis of the value of the pressure deviation ([delta] P) and the amount of change, using the pressure deviation ([delta] P) and the flow rate target value (QT) as inputs. An energization start angle calculation unit (130) calculates an energization start phase ([theta] on) during the reciprocating motion of the plunger on the basis of the limited flow rate value (QL), and starts energization of the solenoid valve of the high-pressure fuel pump at the energization start phase ([theta] on).

The invention discloses an electronic unit pump and an oil supply control method thereof.The electronic unit pump comprises a pump body, a valve body, a push rod and the like, a roller is installed on the push rod and controlled by an oil pumping cam, and the valve body is at least provided with a first drainage channel and a second drainage channel which are communicated with a main oil channel; the valve body is at least provided with a first electromagnetic valve used for controlling the first drainage channel to be connected and disconnected and a second electromagnetic valve used for controlling the second drainage channel to be connected and disconnected. By controlling the opening and closing moments of the first electromagnetic valve and the second electromagnetic valve, the three-section fuel injection requirement of the engine in the diesel engine state of'pilot injection, main injection and post injection 'can be met, the fuel supply requirement of the micro-injection gas engine can also be met, and the engine can be restored to the full-power diesel engine state to operate after gas fuel is used up.

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 fuel rail assembly (118) comprising: a fuel rail (120); an adaptor (126); a fuel supply line (160); and a releasable coupling arrangement (162) for releasably coupling the fuel supply line (160) to the adaptor (126). The fuel rail (120) comprises a fuel supply passage (122) by which fuel is supplied to said at least one fuel injector (124). The adaptor (126) comprises a body (128) including an inlet (130). The adaptor (126) is mounted to the fuel rail (120) such that the inlet (130) is in fluid communication with the fuel supply passage (122). The fuel supply line (160) comprises a fuel orifice (164). The fuel supply line (160) is releasably coupled to the adaptor (126) via the releasable coupling arrangement (162) such that the fuel orifice (164) is in fluid communication with the inlet (130) for supplying fuel from the fuel orifice (164) to the fuel supply passage (122) via the inlet (130).

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).