Abstract: Disclosed is a process for the preparation of vegetable protein isolates of high quality, that allows maintaining in the final product the nutritional value and specific functionalities of the native biological activity of the proteins of the starting vegetable raw material. Also disclosed are the vegetable protein isolates obtained by this process and their use in the food sector.

Abstract: Various embodiments include a fluid injector comprising: an injector housing defining a fluid path; a needle within the housing and movable to a closed position and an open position. The needle comprises two axial ends, an end face on the second, and an axial needle section surrounded by the housing. Between the axial section and the surrounding housing, there is a gap comprising at least part of the fluid path. The needle includes a hole extending from the end face and a connecting hole providing fluid connection between the hole and the gap. The valve also includes a plate defining a through-hole. A first valve seat is defined at a surface of the plate facing the end face and adjoining the through-hole and when the needle is in the closed position the through-hole is closed by the end face.

Abstract: The present disclosure relates to a fuel injector for injecting fuel into a combustion engine. It may comprise a valve with a movable needle, two springs pushing the needle toward the closed position, and an actuator for opening the valve. The needle may be in a fuel reservoir of a valve body. The actuator may supply pressurized fuel to the fuel reservoir so that the fuel pressure forces the needle away from the closed position against the spring force of the first spring or the first and second springs, respectively. There may be play between the second spring and the needle when the needle is in the closed position.

Abstract: The present disclosure relates to valves. Some embodiments may include solenoid injection valves with a valve body; a valve needle with a needle shaft, an upper retaining element, and a lower retaining element; an electro-magnetic actuator comprising a pole piece and an armature spaced from the pole piece by a first axial gap when de-energized. The armature slides on the valve needle between the upper retaining element and the lower retaining element. The valve may include a calibration spring and a spring element arranged between the armature and the upper retaining element. The armature compresses the spring element and travels at least 50% of the first axial gap before an opening force of the valve assembly becomes larger than a total needle closing force.

Abstract: The present disclosure relates to internal combustion engines. Various embodiments may include a fuel injection system for delivering fuel to an internal combustion engine. For example, fuel injector may include a valve body having a cavity; a valve needle with a retainer moving in the cavity; an actuator assembly comprising: a spring element next to the valve needle; an electro-magnetic coil; an armature element movable in the cavity; and an anti-bounce device. The armature element may be between the retainer portion of the valve needle and the anti-bounce device. The anti-bounce device may impose a spring force and a hydraulic force for dampening a movement of the armature element. The anti-bounce device may comprise a spring portion exerting the spring force to close the valve needle and a hydraulic damper portion integrally connected to the spring portion.

Abstract: Various embodiments include an anti-reflection device for preventing the reflection of pressure waves inside an injection valve comprising: a cylindrical base body with a longitudinal axis L to be orientated parallel to a propagation direction of a pressure wave; a first section adjacent to a first base side having a cavity shaped as a hollow cone, a longitudinal axis of the cone orientated parallel to the longitudinal axis L of the device, and a base area of the cone coplanar with the first base side of the cylindrical base body; and a second section adjacent to the second base side comprising a through-hole in fluid communication with the cone, hydraulically linking the second base side with the first base side. The through-hole makes an angle ? with the longitudinal axis L, wherein 40°???60°.

Abstract: The present disclosure relates to internal combustion engines. Various embodiments may include an electromagnetic injection valve, particularly a solenoid type fluid injection valve for automotive applications. For example, an electromagnetic injection valve may include: an inlet tube; a valve body having a longitudinal axis and a cavity in which a valve needle moves; an upper magnetic ring press-fitted with the inlet tube or the valve body; a lower magnetic ring press-fitted with the valve body; and a housing part surrounding an electromagnetic actuator unit for moving the valve needle. The lower magnetic ring is positioned on the valve body in such a way that an upper side of the lower magnetic ring is in close contact with an underside of the housing part. The electromagnetic actuator unit abuts the upper magnetic ring and the lower magnetic ring on opposite axial sides. The housing part and/or the lower magnetic ring comprises a cut extending along the axis.

Abstract: The present disclosure relates to fuel injection systems. The teachings thereof may be embodied in an adjustment device for a fuel injection valve including a ring element to fit a recess of the cylinder head between a valve housing and the cylinder head to align the valve relative to the recess. The ring element may include a metallic coil spring and an elastomeric component surrounding and completely enveloping the metallic component.

Abstract: A valve assembly for an injection valve includes a valve body having a central longitudinal axis and a cavity with a fluid inlet portion and a fluid outlet portion, a valve needle axially movable in the cavity to prevent a fluid flow through the fluid outlet portion in a closing position and to allow fluid flow through the fluid outlet portion in further positions, and a guiding device arranged in the cavity and configured to guide the valve needle relative to the valve body. The guiding device has a first guide element fixedly coupled to the valve body and a second guide element fixedly coupled to the valve needle. The first guide element includes a magnetic material with a first magnetic field and the second guide element includes a magnetic material with a second magnetic field, the first and second magnetic fields being orientated in opposite directions.

Abstract: Various embodiments include a valve assembly comprising: a housing; a needle within the housing; a first valve seat; a first valve closing part moved by the needle between a closed position and an open position; a second valve seat; and a second valve closing part moved by the needle between a closed position and an open position; a flow calibration ring fixed to the housing, surrounding the needle leaving a flow gap in between, wherein a front face of the flow calibration ring forms the second valve seat; and a stopping part fixed at the needle, wherein the stopping part and the flow calibration ring contact each other to act as an axial stop and thereby limit the maximum lift of the needle.

Abstract: Various embodiments include an anti-reflection device for preventing the reflection of pressure waves inside an injection valve comprising: a cylindrical base body with a longitudinal axis L to be orientated parallel to a propagation direction of a pressure wave; a first section adjacent to a first base side having a cavity shaped as a hollow cone, a longitudinal axis of the cone orientated parallel to the longitudinal axis L of the device, and a base area of the cone coplanar with the first base side of the cylindrical base body; and a second section adjacent to the second base side comprising a through-hole in fluid communication with the cone, hydraulically linking the second base side with the first base side. The through-hole makes an angle ? with the longitudinal axis L, wherein 40°???60°.

Abstract: Some embodiments include: a valve body; a valve needle; a calibration spring biasing the needle to close a fluid outlet; an armature to actuate the needle; and an armature stopper comprising an armature support, a circumferential side wall, and a circumferential clamping portion. The armature stopper is coaxial with the valve needle below the armature, facing the armature and providing a stop for the armature in the closing direction. The clamping portion includes a circumferential gutter formed by a base portion, an inner wall and an outer wall. The inner wall is part of the circumferential side wall with a smaller radial extension than the outer wall and is closer to the valve needle. The outer wall extends circumferentially around the inner wall to form a press-fit area for press-fitting the armature stopper into the valve body.

Abstract: Various embodiments include a fluid injector comprising: an injector housing defining a fluid path; a needle within the housing and movable to a closed position and an open position. The needle comprises two axial ends, an end face on the second, and an axial needle section surrounded by the housing. Between the axial section and the surrounding housing, there is a gap comprising at least part of the fluid path. The needle includes a hole extending from the end face and a connecting hole providing fluid connection between the hole and the gap. The valve also includes a plate defining a through-hole. A first valve seat is defined at a surface of the plate facing the end face and adjoining the through-hole and when the needle is in the closed position the through-hole is closed by the end face.

Abstract: A valve assembly is provided with a valve body, a valve needle and an armature. An actuator assembly surrounds the valve assembly. The actuator assembly includes a housing and a coil. The coil can be energized so as to induce a force for axially displacing the armature. A flow characteristic of fluid to be injected by the injector is adjusted by axially shifting the valve assembly and the actuator assembly relative to one another.

Abstract: A fluid injector for a combustion engine has a tubular body which hydraulically connects a fluid inlet end of the injector to a fluid outlet end of the injector. A magnetic core is affixed inside the body, a solenoid is disposed on the outside of the body, and an axially moveable armature is disposed inside the body. A valve assembly controls an axial flow of fluid through the body. The valve assembly has a valve needle to be operated by the armature and a sleeve of diamagnetic material which is located radially between the armature and the body.

Abstract: A fuel injection valve includes a housing with a cavity, a valve needle, an actuator including a magnetic coil arranged in a coil casing, and an armature in the cavity. The housing includes a separation ring positioned between the armature and the coil casing and configured to lead the electromagnetic flux to the armature. The separation ring includes a first part and a second part. The first part is made of a first material and the second part is made of second material that differs from the first material. The first material and the second material are magnetic materials.

Abstract: A fuel injector includes a fuel valve including a valve needle and a valve seat for controlling a flow of fuel through the injector. The fuel injector also includes an electromagnetic actuator with a solenoid and an armature that lifts the valve needle from the valve seat in an opening direction while the solenoid is electrically energized. The fuel injector also includes a housing in which the valve needle and the armature are received such that they are displaceable in reciprocating fashion with respect to the housing and with respect to one another. A spring is arranged between the armature and the housing, for pushing the armature against the valve needle in the opening direction, wherein the spring provides a hysteretic relationship between force and displacement.

Abstract: The present disclosure relates to internal combustion engines. Various embodiments may include a fuel injection system for delivering fuel to an internal combustion engine. For example, fuel injector may include a valve body having a cavity; a valve needle with a retainer moving in the cavity; an actuator assembly comprising: a spring element next to the valve needle; an electro-magnetic coil; an armature element movable in the cavity; and an anti-bounce device. The armature element may be between the retainer portion of the valve needle and the anti-bounce device. The anti-bounce device may impose a spring force and a hydraulic force for dampening a movement of the armature element. The anti-bounce device may comprise a spring portion exerting the spring force to close the valve needle and a hydraulic damper portion integrally connected to the spring portion.

Abstract: The present disclosure relates to internal combustion engines. Various embodiments may include an electromagnetic injection valve, particularly a solenoid type fluid injection valve for automotive applications. For example, an electromagnetic injection valve may include: an inlet tube; a valve body having a longitudinal axis and a cavity in which a valve needle moves; an upper magnetic ring press-fitted with the inlet tube or the valve body; a lower magnetic ring press-fitted with the valve body; and a housing part surrounding an electromagnetic actuator unit for moving the valve needle. The lower magnetic ring is positioned on the valve body in such a way that an upper side of the lower magnetic ring is in close contact with an underside of the housing part. The electromagnetic actuator unit abuts the upper magnetic ring and the lower magnetic ring on opposite axial sides. The housing part and/or the lower magnetic ring comprises a cut extending along the axis.

Abstract: The present disclosure relates to an injection valve. The valve may comprise a fluid inlet tube with a recess, a valve body, a valve needle, a spring element, and an elastic body. The valve body may have a central longitudinal axis and a cavity with a fluid outlet portion. The valve needle may be arranged in the recess of the fluid inlet tube and movable in the cavity. The spring element and elastic body may be arranged in the recess and interact with a portion of the valve body on one side and with a spring rest fixed to the valve needle on another side. The elastic body and the spring element are compressed as the valve needle is moved along the longitudinal axis away from its closing position. The elastic body, in the presence of a fluid pressure in the recess, exerts a fluid-pressure-dependent longitudinal force on the valve needle.