Showing papers by "Friedrich Boecking published in 2009"

Piston pump, particularly high-pressure pump for fuel injection device of internal combustion engine, comprises pump piston, which is adjustably guided to shaft in radial manner

Abstract: The piston pump comprises a pump piston (7), which is adjustably guided to a shaft in a radial manner. A bearing gap section is provided, which is fastened at a lubricating oil pressure increasing unit (23), which increases the pressure controlling the bearing gaps section. A dragging groove (22) is provided, which is formed ring-shaped.

High-pressure pump for fuel injection device of internal-combustion engine of common-rail-system of passenger car, has pump element including pump piston that is partially arranged in cylinder head, which is formed as multipart

Abstract: The pump (1) has a housing (2) and a pump element (6) including a pump piston (7) that is partially arranged in a cylinder head (5), where the cylinder head is formed as a multipart. The cylinder head is formed from two housing parts (26, 27), where one of the parts is made of a high pressure-resistant material, and the other housing part is formed as a flange, which is screwed with the housing. The pump piston is partially arranged in the former housing part. An outlet valve (15) is screwed in the latter housing part. An inlet valve (12) e.g. suction valve, is arranged in the cylinder head.

Device for supplying an internal combustion engine with fuel

Abstract: The invention relates to a device for supplying an internal combustion engine with fuel, comprising a fuel reservoir (1) and a high-pressure pump (2), which are connected through a suction line (3), a metering valve (4) which effects a change of the passage cross-section of the suction line (3), a rail (5) for receiving high-pressure fuel, and a pressure control valve (6) for controlling the pressure in the rail (4). The metering valve (4) and the pressure control valve (6) are combined in a common housing (7) and have opposite opening directions. The metering valve (4) and the pressure control valve (6) have closing members (4.1, 6.1) which are rigidly connected to each other and are movable on a coincident movement axis (14).

High-pressure radial piston pump

Abstract: The invention relates to a high-pressure radial piston pump for the fuel supply of an internal combustion engine, comprising a housing (1) having a drive shaft (2) that is accommodated therein, rotates about an axis and has a cam or eccentric disk (3) projecting in the radial direction by means of which multiple pistons (5) accommodated in cylinders (4) are engaged, which can be successively displaced in the radial direction by the cam or eccentric disk (3), wherein the housing (1) is equipped with a mounting flange for mounting the same to the internal combustion engine, wherein the cylinders (4) are connected via fuel lines, which are proportionately accommodated in the housing (1). The mounting flange (6) and the housing (1) are formed by separate parts. A low-pressure unit (7) is attached to the side of the housing (1) facing away from the mounting flange (6), wherein the mounting flange (6) and the low-pressure unit (7) are connected to the housing such that they can rotate relative to each other and to the housing (1) and together with the housing (1) limit annular channels (8) which concentrically surround the drive shaft (2), and wherein the fuel lines comprise lines that are proportionately formed by means of the annular channels (8).

High-pressure pump arrangement having a single-plunger high-pressure pump

Abstract: The invention relates to a high-pressure pump arrangement for injecting fuel, comprising a single-plunger high-pressure pump (1) comprising a high-pressure cylinder (2), in which a piston tappet (3) is disposed in an axially movable manner for pressurizing fuel and is driven by a pump cam (6) comprising at least one raised area (7a, 7b, 7c), wherein the pump cam (6) has exactly three raised areas (7a, 7b, 7c) disposed at equally spaced distances along the outer circumference in order to create synchronized injection without an intermediate transmission for a row of 3x cylinder engines (x= 1, 2, 3... n).

Hochdruckpumpenanordnung mit einstempliger Hochdruckpumpe

Abstract: Hochdruckpumpenanordnung zum Einspritzen von Kraftstoff, umfassend eine einstemplige Hochdruckpumpe (1) mit einem Hochdruckzylinder (2), in welchem ein Kolbenstosel (3) zur Druckbeaufschlagung von Kraftstoff axial bewegbar angeordnet und uber einen Pumpennocken (6) mit mindestens einer Erhebung (7a, 7b, 7c) angetrieben ist, wobei der Pumpennocken (6) genau drei in aquidistanten Abstanden entlang des Ausenumfangs angeordnete Erhebungen (7a, 7b, 7c) aufweist, um fur eine Reihe von 3x-Zylindermotoren (x = 1, 2, 3...n) zwischengetriebelos eine Einspritzsynchronitat herzustellen.

Radial piston pump for use in internal combustion engine, has recess for receiving roller provided at end of plunger turned towards drive shaft, and guide body comprising borehole or elongated hole along center axis of roller

Abstract: The pump has a drive shaft (2) mounted in a pump housing (1). A piston (8) is moved back and forth by turning the drive shaft in an element hole (11) in a radial direction. A plunger (23) is guided into the pump housing and arranged between the piston and the drive shaft. A recess (27) for receiving a roller (28) is provided at an end of the plunger turned towards the drive shaft. The roller is guided into a guide body (26) through bulges at lateral front sides of the roller. The guide body has a borehole or an elongated hole along a center axis of the roller.

High-pressure pump for fuel injection device of internal combustion engine, has high-pressure bore limited by internal wall surface of housing part, where counterbore of high-pressure bore causes counter-pressure to adjacent fuel pressure

Abstract: The pump has a high-pressure bore (1) limited by an internal wall surface of a housing part (3). The high-pressure bore includes two grooves or a counterbore extending over a circumferential region of the internal wall surface, where the counterbore is provided in the form of a borehole. Another high-pressure bore (2) is limited by another internal wall surface of the housing part, and has a counterbore for forming an annular shoulder. The counterbore of the latter high-pressure bore causes counter-pressure to adjacent fuel pressure, and causes release of the housing part.

Radial piston pump comprising a prismatic base body for a fuel injection system

Abstract: The invention relates to a radial piston pump, the pump housing thereof essentially consisting of a prismatic base body (1), a fixing flange (9) and a bearing cover (17). Said prismatic base body can be used for radial piston pumps comprising at least one pump element without any significant modifications.

Pump, particularly a high-pressure fuel pump

Abstract: The invention relates to a pump, comprising at least one pump element (18), which has a pump piston (20) driven in a lifting motion at least indirectly by a drive shaft (14). The pump piston (20) is guided in a cylinder bore (22) of a housing part (24) of the pump, wherein the housing part (24) has a cylindrical section (44) surrounding the cylinder bore (22). A cup-shaped tappet (50) is disposed between the pump piston (20) and the drive shaft (14) and has base (52) facing the drive shaft (14), and a jacket (54) connected thereto, wherein the jacket (54) of the tappet (50) is guided on the cylindrical section (44) of the housing part (24) in a displaceable manner. A spring (58) is provided, by means of which the tappet (50) is pressurized toward the drive shaft (14). The pump piston (20) abuts the base (52) of the tappet (50) with the front (21) thereof facing the drive shaft (14). A disk (60) is mounted on the pump piston (20) in the end region thereof facing the base (52) of the tappet (50), said disk having a greater outside diameter than the pump piston (20). The pump piston (20) comprising the disk (60) is secured in the tappet (50) in the direction of the longitudinal axis (23) of the pump piston (20) by means of a safety element (64) engaging in the disk (60).

Method and system for injecting fuel into internal combustion engines

Abstract: The invention relates to a method and to a system for injecting fuel into internal combustion engines, the injection taking place by way of an injection system and the fuel to be injected having an increased amount of fatty acids or fatty acid esters, particularly biodiesel. According to the invention, the components of the injection system coming into contact with the fuel are at least partially provided with a coating that has a low tendency for the agglomeration of fuel components, particularly fatty acids and fatty acid esters.