摘要:
A fuel injection pump for internal combustion engines having a plurality of in-line pumping elements, in which there is one pumping element in the injection pump for each individual combustion chamber of the engine. Each pumping element is surrounded by one partial suction chamber, and quantity dividers inserted into inflow and outflow conduits divide the flow of fuel into partial fuel flows so that each partial suction chamber is flushed, whereby no outflowing fuel is capable of mixing with inflowing fuel.
摘要:
A valve for metering a flowing, e.g. gaseous or liquid, medium, in particular a fuel injection valve for internal combustion engines, is described, which valve comprises a valve housing having an inflow for the medium, a valve body having a metering opening for the medium, a join present between the valve housing and valve body, and a seal sealing the join. In order to ensure a seal that is reliable and not susceptible to cracking, in which context the material of the valve housing and valve body can be selected without restriction, the seal has a clamping ring, covering the join, that sits with a press fit on end portions, facing toward one another at the join, of the valve housing and valve body.
摘要:
A valve for metering fluid under pressure includes: a valve housing which has an inlet opening and a metering opening as well as a valve seat enclosing the metering opening having an outwardly pointing seat surface; a valve needle carrying a closing head; a valve-closing spring acting on the valve needle and applying the closing head to the valve seat; and an electrical actuator, which applies a compressive force to the valve needle, lifting the closing head outwardly away from the valve seat. To prevent transverse forces on the valve needle, which can cause a deflection of the valve needle, a gimbal-mounted spring disk, which is pushed onto the valve needle, is used as the valve-closing spring.
摘要:
A valve for metering fluid includes: a piezoelectric actuator for metering control; two electrical connection elements for applying an electrical control voltage; and a discharge resistor integrated into the actuator, which resistor bridges the two connection elements.
摘要:
An injector for a fluid, particularly for fuel, is provided having a valve housing, a fluid intake, a valve chamber having a spray-discharge orifice, a piezoelectric or magnetostrictive actuator situated in the valve housing and a fluid-guiding pipe connecting a fluid intake and a valve chamber, which is situated in the valve housing running along the actuator. In order to create structural space in the valve housing for guiding through the fluid-guiding pipe which has a sufficiently large diameter for reducing pressure drops in the intake region, a hollow cylinder surrounding the actuator and developed as a prestressed spring is provided with a cylinder wall opening that extends axially through the entire length, and the positioning of the fluid-guiding pipe in the valve housing is undertaken so that it extends radially into the cylinder wall opening.
摘要:
A fuel injection device for injecting fuel includes an electrical-plug-and-socket connection configured as a modular component. The electrical-plug-and-socket connection includes an electric line region and exactly one one-piece plug contact molding. The plug contact molding surrounds the electric line region, and the plug contact molding forms a part of the outer geometry of the fuel injection device.
摘要:
An injection valve for an internal combustion engine including at least a nozzle body, in which a nozzle needle is guided axially displaceably, and an at least one-piece retaining body, in which means for actuating the nozzle needle are disposed. On its circumferential surface, the nozzle body has means for engagement of a centering tool.
摘要:
A valve for controlling fluids, having a piezoelectric actuator unit for actuating a valve member is proposed, which has at least one adjusting piston and at least one actuating piston that is guided in a valve body and actuates a valve closing body, which valve closing body cooperates with at least one valve seat embodied on the valve body and in the closing direction disconnects a control bore from an outlet chamber, from which a return conduit branches off, wherein between the adjusting piston and the actuating piston, a hydraulic chamber is disposed, which transmits a motion of the adjusting piston to the actuating piston. To keep the size of the actuator unit small, the actuating piston, at least when the valve closing body is closed, is supported essentially in a hydraulically force-balanced fashion.
摘要:
A valve for metering a fluid (liquid or gaseous medium), in particular, a fuel injector for internal combustion engines, having a valve housing, an actuator accommodated in the valve housing and acting on a valve member, an electrical connector accessible on the outside of the valve housing, and an electrical supply lead that produces an electrical connection from the connector to the actuator and has two lead strands, each having a flexible strand section. To optimize the electrical supply lead to lower production costs, simplified valve assembly and anti-twist protection for the actuator, each lead strand is made of an electrical conductor provided with a plastic sheathing and having a front and rear, in each case elongated conductor section and a middle conductor section in between that has at least one meander-shaped curvature for realizing the flexible strand section, and a plastic bridge member, in one piece with the plastic sheathings in the area of the middle conductor sections of both electrical conductors, connects the two lead strands to form a torsionally stiff supply-lead module.
摘要:
A tubular spring is provided for preloading a piezoelectric or magnetostrictive actuator for the actuation of fuel injection valves for fuel injection systems of internal combustion engines. The tubular spring has at least two assembly engagements for uniform preloading of the tubular spring.