57results about "Fuel injecting pumps" patented technology

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 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 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).

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

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 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.

A high-pressure plunger pump (1) comprises a pump head (2), a plunger housing (3) attached to the pump head (2), a valve body (5) arranged in respective receptacles of the pump head (2) and the plunger housing (3), at least one plunger assembly (4) arranged in the plunger housing (3) with a working chamber (41) and an axially movable plunger (42) delimiting the working chamber (41), at least one inlet valve (6) attached to or in the valve body (5) with an inlet (61) that can be closed by a closing element, at least one outlet valve (7) attached to or in the valve body (5) with an outlet (71) that can be closed by a closing element, wherein the inlet (61) is connected to a supply line (11), wherein the plunger housing (3) with the plunger assembly (4) arranged therein is surrounded by a chamber wall (8), and the pump head (2) has a cap (9) is installed, through which the supply line (11) is passed,wherein the cap (9) together with the chamber wall (8) fluid-tightly enclose the pump head (2) and the plunger housing (3).

The present application relates to a kind of common rail pump driving device for diesel engine, it includes: coupling disc, coupling disc is the axial hollow cylindrical structure as a whole, wherein, axial hollow is conical frustum, coupling disc and camshaft are fixed to circumferential direction, when coupling disc rotates, drive camshaft to rotate, realize the drive of common rail pump;Fuel injection pump gear, fuel injection pump gear is the hollow disc of concave outer drum, outer circumferential edge is set with the gear of fuel injection pump driving gear matching, coupling disc is set and fixed fuel injection pump gear;Bushing, bushing is cylindrical tube structure, one end is set on the outer circumference of coupling disc, the other end is set and connected common rail pump, for sealing the oil of transmission case, and play the role of support and sliding bearing;Wherein, timing gear, fuel injection pump driving gear and fuel injection pump gear are matched and engaged transmission power, further through coupling disc drive common rail pump camshaft rotation, drive common rail pump oil supply, realize the fuel supply of common rail pump.

This invention provides a dual-valve nested mechanical delivery valve, a fuel injection pump, and an engine, solving the problems of poor residual pressure control and unreasonable unloading process in existing engine fuel valve structures. The dual-valve nested mechanical delivery valve includes: a valve housing with a delivery pipe and a fixed cavity communicating with it; a delivery valve cover installed in the fixed cavity; an inlet pipe aligned with the delivery pipe; the inlet pipe includes an outer valve mounting section and an inner valve mounting section extending to the bottom of the outer valve mounting section; the outer valve mounting section has a larger diameter than the inner valve mounting section, and the stepped edge formed between the outer and inner valve mounting sections has an outer valve mating surface; and a valve core assembly including an outer valve core, an inner valve core, a valve seat spring member disposed within the delivery pipe, and a pressure-reducing spring member disposed within the inner valve mounting section; the outer valve core has a valve core mounting hole and a valve core through hole.

This application relates to an oil collecting plate for a high-pressure fuel pump. The oil collecting plate has a protrusion extending from both sides, located on the side edges. This protrusion increases the thread depth of the high-pressure fuel outlet connector, thereby increasing the effective number of thread turns and also increasing the thickness of the high-pressure sealing area, effectively blocking the impact of high-pressure fuel. To avoid stress concentration at the contact point between the high-pressure fuel outlet connector and the oil collecting plate, the original planar seal is replaced with a conical seal, improving the sealing performance of the oil collecting plate and reducing stress concentration within it. This application is applicable to the high-pressure sealing of diesel engine oil collecting plates.

The present invention provides an injector that allows for rapid stopping of injection and suppresses fluid pressure loss during injection. [Solution] The injector comprises a nozzle body and a nozzle needle 30. The nozzle body has an injection hole formed at one end in the axial direction, and the nozzle needle 30 is provided inside the nozzle body so as to be reciprocally movable along the axial direction. The nozzle body has a first cylindrical portion 31 and a second cylindrical portion 32. The first cylindrical portion 31 is located on the side of one end in the axial direction, and the second cylindrical portion 32 is located on the side of the other end in the axial direction and has an inner diameter larger than the inner diameter of the first cylindrical portion 31. The nozzle needle 30 has a flow path adjustment portion 38 that extends radially from a part of the outer circumferential surface in the axial direction. In the axial direction, the flow path adjustment portion 38 is located within the range where the second cylindrical portion 32 is located during injection, and within the range where the first cylindrical portion 31 is located when injection is stopped.

This invention provides a fuel pump capable of suppressing plunger fixation. The fuel pump of this invention includes: a plunger 2 that reciprocates; a cylinder 6, wherein a guide hole 6a guiding the reciprocating motion of the plunger 2 extends axially; and a pump body 1 that holds the cylinder 6. The pump body 1 has: a cylinder insertion hole 1g into which the cylinder 6 is inserted; and a pressurization chamber 11 communicating with the cylinder insertion hole 1g, the volume of which increases or decreases due to the reciprocating motion of the plunger 2. The cylinder 6 has: a pressing portion 6b pressed into the inner circumferential surface of the cylinder insertion hole 1g; and a groove 6d formed on the inner circumferential surface of the guide hole 6a at a position corresponding to the pressing portion 6b.

High-pressure pump (1) comprising a housing (2) with a pump cylinder (13) in which a pump piston (16) is arranged to move translationally up and down for conveying a pumped medium, wherein the pump piston (16) interacts directly or indirectly with a drive shaft (5) and at least one bearing of the drive shaft (5) is lubricated by means of a lubricant supplied through a line (21) and which is different from the pumped medium, wherein a control device (3) for maintaining a constant quantity of lubricant supplied to the high-pressure pump (1) is integrated into the line (21), wherein the lubricant is oil, wherein the control device (3) comprises a control throttle (40) actuated by a diaphragm (34), wherein the diaphragm (34) has a first lubricant-exposed pressure side with pressure surface A1 adjacent to a pressure chamber V1 and a second lubricant-exposed pressure side with pressure surface A2 adjacent to a pressure chamber V2,characterized in that the second printing side has a button (37) functioning as a control throttle (40) with the printing surface A3 interacting with a seat (38), wherein the button (37) interacts with the seat (38) comprising a discharge line (39) interacting with the line (21).

The application provides a high-pressure oil pump PCV pressure control valve, which adjusts pressure by a stroke gasket to control fuel flow, and has higher control precision and faster dynamic response. The valve comprises a valve core, a valve sleeve, a valve body, an armature, a return spring and an electromagnetic coil. The valve core comprises a guide cylinder, and a valve core stopper protrusion and a flow-avoiding ring groove are arranged on the bottom of the guide cylinder from bottom to top. The valve sleeve comprises a guide through hole in the radial center, and a sealing valve port is arranged on the bottom of the guide through hole. The sealing valve port cooperates with the valve core stopper protrusion to perform closing operation. A plurality of oil inlet holes are arranged on the outer surface of the lower part of the valve sleeve and are connected to the guide through hole and the flow-avoiding ring groove. The valve body comprises a valve core guide movable cavity and a plurality of coil installation cavities. The valve core guide movable cavity is arranged on the lower part of the radial center of the valve body, and the plurality of coil installation cavities are arranged on the valve body.

Internal combustion engine of a motor vehicle equipped with a fuel injection system, comprising a camshaft (6) disposed in a closed volume of a cylinder head (2) having a channel (20) supplied with pressurized oil for the lubrication of this camshaft (6), and comprising a high-pressure fuel pump including a cylindrical roller (12) fixed to the end of a sliding pump tappet (14), which bears against a pump cam (10) of the camshaft (6), the cylinder head (2) having an oil jet (30) connected to the lubrication channel (20), which has a calibrated flow control bore (38) directed towards the pump cam (12). Figure 1

The system determines whether or not to initialize the high-pressure pump correction learning values, and enables automatic initialization if necessary. [Solution] A method for initializing a high-pressure pump correction learning value, comprising: periodically acquiring a rail pressure deviation, which is the difference between the indicated rail pressure and the actual rail pressure; calculating an integral rail pressure deviation value, which is the sum of the periodically acquired rail pressure deviations; temporarily invalidating the high-pressure pump correction learning value stored in an EEPROM provided in the electronic control unit if this integral rail pressure deviation value is outside a predetermined detection range; acquiring a new high-pressure pump correction learning value through learning; and initializing the high-pressure pump correction learning value in the EEPROM if the acquired high-pressure pump correction learning value does not meet predetermined tolerance conditions.

An overmolded coil assembly (60) is provided, comprising a body (62) having a hollow cylindrical shape and including an inner surface (62b) defining a central opening (62d) and a recess (62c). A spool (64) is received in the recess of the body. The spool comprises an annular barrel (64e) and has opposing first and second ends (64a, 64b). The first end (64a) is adjacent to the central opening of the body. A coil (66) of electrically conductive wire is arranged within the annular barrel of the spool and surrounds it. A washer (68) having inner and outer surfaces (68c, 68d) is adjacent to the second end of the spool. An overmolded element (72) made of an electrically insulating material covers the spool, coil, washer and body, and seals the periphery of the spool, coil, washer and body. A fuel pump (20) including the overmolded coil assembly and a method for sealing the coil assembly are also provided.

This utility model discloses a marine plunger sleeve assembly with a buffer function, relating to the field of plunger sleeve technology. The plunger sleeve body has a connecting groove inside, and the plunger sleeve body is fixedly connected to the plunger body through the connecting groove. A buffer structure is provided at the bottom of the plunger sleeve body, and the buffer structure includes a first sealing ring, with a sealing gasket at the bottom of the first sealing ring. A second sealing ring is connected to the bottom of the sealing gasket, and the second sealing ring is fixedly connected to the plunger body. A connecting damper is provided at the top of the second sealing ring. Through the buffer mechanism, when the plunger sleeve body is connected to the plunger body, the first and second sealing rings seal the interface. When the plunger sleeve body or the plunger body shakes, the sealing gasket absorbs the pressure, and then the connecting damper contracts and resets, thereby offsetting the pressure caused by the shaking. This prevents the plunger body from shifting or leaking oil when connected to the plunger sleeve body.

This invention relates to a compact high-pressure oil pump drive component and a high-pressure oil pump. The pump body assembly provides support for the camshaft assembly via an interference-fitted bushing. The camshaft assembly includes a double thrust bushing and a slider assembly. An eccentric circle drives the slider to reciprocate, achieving the plunger's oil supply function. A sleeve is nested within the guide rod guide section, and its reciprocating motion is achieved through the elastic action of a limiting spring. The guide rod guide surface is coated and has lubrication spiral grooves to reduce friction loss and extend service life. The flange assembly has an internal bushing, and the lubrication oil circulation system is optimized through an oil cavity, eccentric groove, and connecting hole to ensure continuous lubrication of moving parts. The inner bore of the thrust bushing is interference-fitted with the camshaft support journal, and the shoulder surface is evenly distributed with oil grooves to form a dynamic lubrication film, limiting the camshaft axial movement to ≤0.5mm. The slider assembly has an internal bushing, which, together with the axial force of the plunger and sleeve, restricts slider rotation, improving motion stability.

A high-pressure plunger pump (1) has a pump head (2); a plunger housing (3) secured to the pump head (2); a valve body (5) which is provided in respective receiving areas of the pump head (2) and the plunger housing (3); at least one plunger assembly (4), the plunger assembly being provided in the plunger housing (3) and having a working chamber (41) and a plunger (42) which delimits the working chamber (41) and is axially movably mounted; at least one inlet valve (6), the inlet valve being secured to or in the valve body (5) and having an inlet (61) which can be blocked by a closing body; and at least one outlet valve (7), the outlet valve being secured to or in the valve body (5) and having an outlet (71) which can be blocked by a closing body. The inlet (61) is connected to a feed line (11), the plunger housing (3) with the plunger assembly (4) provided therein is surrounded by a chamber wall (8), and a cap (9) through which the feed line (11) is led is provided on the pump head (2), the cap (9) together with the chamber wall (8) fluid-tightly enclosing the pump head (2) and the plunger housing (3).

The purpose of this invention is to provide a piston-type booster pump and a fuel injection system based on a dual-solenoid valve booster pump with a flexible and variable injection pattern, belonging to the field of engine technology. Fuel is pressurized by an electronically controlled unit pump and enters the high-pressure common rail. The piston-type booster pump can further pressurize the pressurized fuel, thereby changing the injection pressure of the injector and achieving a variable fuel injection pattern. When only one booster pump solenoid valve is open, the piston-type booster pump has a long booster response time and a slow increase in injection rate. When both booster pump solenoid valves are open simultaneously, the piston-type booster pump has a short booster response time and a fast increase in injection rate. The electronic control unit achieves flexible control of the injection pattern by coordinating the opening and closing sequence of the two booster pump solenoid valves, the electronically controlled unit pump solenoid valve, and the injector solenoid valve.

This relates to a fuel valve for injecting liquid fuel into the cylinder of a large turbocharged two-stroke uniflow scavenging internal combustion engine. [Solution] In a fuel injection valve for injecting fuel into a large two-stroke turbocharged uniflow scavenging internal combustion engine, the cylindrical distal portion 39 of the axially displaceable valve needle 35 is positioned inside the nozzle 40 and cooperates with the valve seat in the valve body to close the injection valve. A seal ring 52 is provided on the cylindrical distal portion 39 of the valve needle 35.

The utility model discloses an improved high -pressure oil oil supply rotation assembly structure belongs to high -pressure oil oil supply rotation assembly technical field, including valve block, install rotation solenoid valve, open -and -close solenoid valve, shunt and rotation speed regulating valve on the valve block, through with the rotation solenoid valve and open -and -close solenoid valve integration to a valve block, and cooperate shunt and rotation speed regulating valve use, excavator high -pressure oil enters valve block IN mouth from the broken hammer pipeline, then divides into two -way supply rotation oil circuit and shunt oil circuit. Rotation oil circuit supplies rotation solenoid valve after through rotation speed regulating valve and rotates the flow to the flow required by rotation motor, through the coil of rotation solenoid valve two ends respectively energized can realize the commutation to rotation action. Another way supplies open -and -close solenoid valve, and open -and -close solenoid valve oil circuit can realize oil circuit 360 degrees arbitrary rotation and oil circuit's one divides into two through shunt, and supplies oil for open -and -close two oil cylinders.

Pump, in particular high-pressure fuel pump, with at least one pump element (10) having a pump piston (12) driven in a stroke motion, which defines a pump working chamber (24) which can be connected to an inlet (28) via an inlet valve (26), wherein the inlet valve (26) has a valve member (38) which is movable between an open position and a closed position, wherein the valve member (38) is acted upon in the closing direction by a valve spring (52) which is supported on the valve member (38) via a support element (50), wherein the support element (50) comes into contact with a stop (58) to limit the movement of the valve member (38) in its opening direction, wherein the support element (50) and / or the stop (58) has at least one, preferably several, recesses (94) distributed over its contact surface (56; 60).96) having a reduced contact area between the support element (50) and the stop (58), wherein the at least one recess (94; 96) is hydraulically connected to a space (62) surrounding the support element (50), wherein the at least one recess is designed as a groove (94) extending at least approximately radially to the longitudinal axis (79) of the valve member (38), characterized in that the at least one recess is designed as a groove (96) extending in the circumferential direction of the support element (50) or the stop (58), wherein several grooves (94) extending at least approximately radially are provided, which are connected to each other by at least one groove (96) extending in the circumferential direction.