Detlef Nowak

Bio: Detlef Nowak is an academic researcher from Bosch. The author has contributed to research in topics: Internal combustion engine & Combustion chamber. The author has an hindex of 11, co-authored 44 publications receiving 524 citations.

Fuel-injection valve

Abstract: The invention relates to a fuel-injection valve, in particular a high-pressure injection valve for directly injecting fuel into a combustion chamber of a compressed-mixture, spark-ignition internal combustion engine. Said valve is characterised in that an outlet opening (23) is provided downstream of the valve seat (20), the downstream end of said opening having a slit-forming element (30) that to a great extent closes the outlet opening (23). A slit-type flow outlet (35), through which a fuel spray can be discharged in a fan-type jet, is formed between the slit-forming element (30) and a front face (34) of the valve seat body (16).

Method for manfacturing an orifice plate

Abstract: A method for manufacturing an orifice plate that is built up in multiple layers and includes a complete axial through passage for a fluid. The orifice plate includes inlet openings, outlet openings, and at least one conduit lying between them. The layers or functional planes of the orifice plate are built up on one another by electroplating metal deposition (multilayer electroplating). Orifice plates manufactured in this manner are particularly suitable for use on injection valves in fuel injection systems, in paint nozzles, inhalers, or inkjet printers, or in freeze-drying processes, for spraying or injecting fluids such as beverages.

Fuel injection valve and a method for manufacturing exit oulets on the valve

Abstract: This invention relates interalia to a method for manufacturing outlets (32) on a valve, especially a fuel injection valve. The injection valve has a fuel inlet (2), an excitable actuating device (1, 2, 19) through which a valve closing member (28) can be moved, a valve seat (27) which is fixed to a valve seat element (26), whereby the valve seat cooperates with the valve closing member (28) to open and at least one outlet (32) which is located downstream from the valve seat (27) and is used as a fuel outlet. At least one outlet (32) is manufactured in such a way that a hole is made in the valve seat element in a first step of the inventive method (26) and in a second step an outlet area is created differing in shape and/or size and/or contours from the hole and originating from the injection-site end of said hole.

Nozzle plate, particularly for injection valves and processes for manufacturing a nozzle plate

Abstract: The nozzle plate according to the present invention includes an axial passage for a fluid, particularly for a fuel, which is made up in the downstream direction by a filter, a ring chamber and an uninterrupted ring gap following one another. Using this arrangement, a cohesive tulip-shaped jet lamella can be produced which thins out in the downstream direction and then disintegrates into tiny droplets. As a consequence, the exhaust emission of an internal combustion engine can be further reduced and likewise a reduction of the fuel consumption can be achieved. The nozzle plate is suited particularly for injection valves in fuel injection systems of internal combustion engines with externally supplied ignition which compress the mixture.

Atomizing disc and fuel injection valve having an atomizing disc

Abstract: An atomizer disk is composed of at least one metallic material, is configured with at least one inlet opening in an upper cover layer and at least one outlet opening in a lower base layer, and has at least two swirl channels that terminate into a swirl chamber, the swirl chamber being provided in a middle swirl generation layer. Through the inlet opening and the swirl channels, two flows of different natures (biflux) enter the swirl chamber. All the layers of the atomizer disk are built up directly onto one another by electroplating metal deposition (multilayer electroplating). The atomizer disk is suitable for use in a fuel injection valve, in particular a high-pressure injection valve for direct injection of fuel into a combustion chamber of a mixture-compressing, spark-ignited internal combustion engine.

Fuel Injection Valve

Abstract: A fuel injection valve is provided that includes a valve seat member ( 3 ) having a conical valve seat ( 8 ) and a valve hole ( 7 ) formed through a central part of the valve seat ( 8 ), a valve body ( 18 ) working in cooperation with the valve seat ( 8 ), and an injector plate ( 10 ) joined to the valve seat member ( 3 ) and having a plurality of fuel injection holes ( 11 ) radially outwardly displaced from the valve hole ( 7 ), a diffusion chamber ( 39 ) providing communication between the valve hole ( 7 ) and the fuel injection holes ( 11 ) being provided between the valve seat member ( 3 ) and the injector plate ( 10 ), wherein the diffusion chamber ( 39 ) formed between the valve seat member ( 3 ) and the injector plate ( 10 ) is in an annular shape, has a diameter that is larger than that of the valve hole ( 7 ), and has inner ends of the fuel injection holes ( 11 ) opening therein, and a plurality of fuel passages ( 42 a , 42 b ) are disposed within the valve hole ( 7 ), the plurality of fuel passages ( 42 a , 42 b ) reversing within the valve hole ( 7 ) fuel that has passed through the valve seat ( 8 ) and guiding the fuel to the diffusion chamber ( 39 ). This enables atomization of injected fuel to be promoted and penetrability to be improved for the fuel injection valve.

Miniature RF and microwave components and methods for fabricating such components

Abstract: RF and microwave radiation directing or controlling components are provided that may be monolithic, that may be formed from a plurality of electrodeposition operations and/or from a plurality of deposited layers of material, that may include switches, inductors, antennae, transmission lines, filters, and/or other active or passive components. Components may include non-radiation-entry and non-radiation-exit channels that are useful in separating sacrificial materials from structural materials. Preferred formation processes use electrochemical fabrication techniques (e.g. including selective depositions, bulk depositions, etching operations and planarization operations) and post-deposition processes (e.g. selective etching operations and/or back filling operations).

Method for Electrochemical Fabrication

Abstract: An electroplating method that includes: a) contacting a first substrate with a first article, which includes a substrate and a conformable mask disposed in a pattern on the substrate; b) electroplating a first metal from a source of metal ions onto the first substrate in a first pattern, the first pattern corresponding to the complement of the conformable mask pattern; and c) removing the first article from the first substrate, is disclosed. Electroplating articles and electroplating apparatus are also disclosed.

Electromagnetic fuel injection valve

Abstract: The invention relates to an injector used for an internal combustion engine, in which a favorable magnetic attraction force is obtained to reduce a controllable minimum injection amount of a fuel injection amount. In a fuel injection valve in which a fixed core (107) and a moving element (114) is contained inside a pipe-shaped member (101), and a coil (105) and a yoke (103) are provided on an outer side thereof, a space for placing the coil (105) is placed so that an inner circumference length in a vertical section of the space becomes smaller than an outside diameter of the yoke (103), or a height of the space in an axial direction of the fixed core (107) becomes smaller than a diameter of the fixed core (107).

Fuel-injection valve

Abstract: The invention relates to a fuel-injection valve, in particular a high-pressure injection valve for directly injecting fuel into a combustion chamber of a compressed-mixture, spark-ignition internal combustion engine. Said valve is characterised in that an outlet opening (23) is provided downstream of the valve seat (20), the downstream end of said opening having a slit-forming element (30) that to a great extent closes the outlet opening (23). A slit-type flow outlet (35), through which a fuel spray can be discharged in a fan-type jet, is formed between the slit-forming element (30) and a front face (34) of the valve seat body (16).