摘要:
The invention relates to a pressure control valve (10) for controlling the pressure in a high-pressure chamber (3) of a high-pressure accumulator (1), in particular of a high-pressure accumulator for fuel. The pressure control valve (10) comprises a valve body (21), a valve seat (20) formed on the valve body (21) and a closing member (30). The closing member (30) interacts with the valve seat (20) in order to open and close a hydraulic connection from the high-pressure chamber (3) to a low-pressure chamber, wherein the valve body projects at least partially into the high-pressure chamber (3). A recess (40) is formed in the end of the valve body (21) which faces the high-pressure chamber (3). A pressure sensor (50) is arranged in the recess (40), in order to determine the pressure in the high-pressure chamber (3).
摘要:
A fuel supply pump with a large fuel discharge amount and a tappet structure body, which are suitably used for an accumulated pressure-type fuel injection device that mechanically amplifies pressure, is provided. A fuel supply pump has a tappet structural body and a spring sheet, wherein a penetration portion for allowing passage of a lubricant or a fuel for lubrication therethrough by coordinating the tappet structure and the spring sheet is provided between a spring-holding chamber for holding a spring to be used for pulling up a plunger and a cam chamber for housing a cam to be used for moving the plunger up and down.
摘要:
The invention relates to a pressure regulator for a high-pressure ramp of a system for injecting fuel into an internal combustion engine, comprising a solenoid valve element (10) which receives an electromagnet (40). The electromagnet controls a needle (20) that closes a valve seat (30) which is connected to a high-pressure inlet and opens into a discharge chamber (13), said discharge chamber communicating with a liquid recirculation system (5) by means of outlet openings (14). The rear face (12) of the solenoid valve element (10) receives a coil (40) which controls the opening process of an armature (41) that is rigidly connected to the needle (20) and is subject to a closing return spring (25). The discharge chamber (13) is located on the front face (11) of the solenoid valve element (10) on the axis (XX) of the needle (20), and the discharge chamber surrounds the needle. A cavity (15) passes through the discharge chamber, said cavity receiving an inlet valve element (50), and a bore (51) which opens into the valve seat (30) passes axially through the inlet valve element. The discharge chamber (13) through which the needle (20) passes axially and the outlet openings (14) which are connected to the liquid recirculation system open transversally into a wall (131) in the discharge chamber (13) below the upper part (132) of the chamber. The regulator is characterized in that the regulator comprises an annular expansion (70) of the discharge chamber (13) below the outlet openings (14) along the extension of a conical surface (31), which forms the valve seat (30) and an annular dead volume (70), above the surface (54) of the valve element (50), which forms the base of the discharge chamber (13) and has the valve seat (30) in the center of the valve element.
摘要:
The invention relates to a high-pressure fuel pump (28) for a fuel system (10) for an internal combustion engine, comprising a pressure limiting valve (42) hydraulically arranged between an outlet (36) and an area that is upstream of the outlet (36). The pressure limiting valve (42) has a spring-loaded closing element (58), which is radially held in place by a closing body (62), wherein the closing body (62) has a concave receiving portion (66), in which the locking element (58) is partially accommodated. According to the invention, an opening angle (ß) of a radially outer first area (74) of the receiving portion (66) of the closing body (62) is smaller than an opening angle (α) of an radially inner second area (76) of the receiving portion (66) of the closing body (62), wherein both areas (74, 76) are arranged radially outside of a contact region (78) between closing element (58) and closing body (62).
摘要:
Die Erfindung betrifft eine Kraftstoffpumpe zum Fördern von Kraftstoff, die mindestens eine Fördereinheit aufweist und mit mindestens einem Kurvengetriebe in Kontakt steht, wobei die mindestens eine Fördereinheit einen Kolben (8), eine Förderfeder (10), eine innere Hülse (12), eine äußere Hülse (14) und einen Sperrbolzen (16) aufweist, die in einem Zylinder (6) angeordnet sind, wobei die innere Hülse (12) mit dem Kolben (8) verbunden ist, wobei die äußere Hülse (14) mit der Förderfeder (10) und einer Rolle (18) des mindestens einen Kurvengetriebes in Kontakt steht, und wobei die innere Hülse (12) und die äußere Hülse (14) über den Sperrbolzen (16) lösbar miteinander zu verbinden sind.
摘要:
A method is proposed for injecting a fuel in a large diesel engine, having at least one cylinder (3) with a combustion chamber (32) for the combustion of the fuel and with a piston (4) for reciprocating movement between a top dead center position and a bottom dead center position, and an injection device (7) for the injection of the fuel into the combustion chamber (32) of the cylinder, wherein the combustion chamber (32) is containing scavenging air under a compression pressure (PC), said method comprising the step of providing the fuel to the injection device (7) in a liquid phase under a fuel pressure (PF), wherein a fuel temperature (TF) is determined such that the fuel converts from the liquid phase to a gaseous phase when the fuel expands from the fuel pressure (PF) to the compression pressure (PC), the fuel is heated to the fuel temperature (TF) and the fuel is injected by the injection device (7) into the combustion chamber (32) of the cylinder (3).In addition, a large diesel engine, especially a large two-stroke diesel engine, and a injection device (7) are proposed.