摘要:
A fuel injector, including a valve insert and a plug extrusion coating, is described, the valve insert including a valve seat and a valve housing. The valve housing has an alignment device, which is equipped to align the valve insert in an injection molding die, and the plastic extrusion coating has a second alignment device which is equipped to align the fuel injector during assembly in an internal combustion engine.
摘要:
A fuel injector for use in an internal combustion engine includes a valve member that is moveable within a bore of an injection nozzle so as to be engageable with a valve seat region to control fuel delivery through one or more nozzle outlets, an injector body housing an actuator that is operable to move the valve member within the bore, and defining an accumulator volume for storing high pressure fuel. The fuel injector includes a damping chamber in fluid communication with the accumulator volume through a fluid passage, the damping chamber serving to reduce pressure wave activity within the accumulator volume.
摘要:
A fuel injection valve of an internal combustion engine includes a measuring plate that has at least one injection hole. Fuel that has flowed along an inner wall surface of the measuring plate flows into the injection hole through an injection hole entrance that is formed in the inner wall surface of the measuring plate, passes through the injection hole, and is injected through an injection hole exit that is formed in an outer wall surface of the measuring plate. A recess is formed from an injection hole entrance rim to an injection hole exit rim in an upstream section of the inner wall surface of the injection hole in a fuel flow direction along the inner wall surface of the measuring plate.
摘要:
The invention relates to a fuel injector and, in particular, to a common-rail injector for injecting fuel into a combustion chamber of an internal combustion engine with a multi-part injection valve element, which can be adjusted between an open position and a closed position. A first part and a second part of the injection valve element are coupled to one another via a hydraulic coupler, which is bounded radially by a first guide for the first part and by a second guide for the second part. According to the invention, at least some sections of the first and the second guide are surrounded at their outer radii by fuel under high pressure, and the pressure realized in the hydraulic coupler is lower than the pressure radially outside the guides.
摘要:
A nozzle body has a first nozzle body element (1) and a second nozzle body element (3). The first nozzle body element (1) is provided with a first nozzle-needle recess (10) accommodating an nozzle-needle (15) and a first guide area (8) for the nozzle-needle (15). In a first process step, the first nozzle body element (1) is assembled with the second nozzle body element (3). Brazing solder having a working temperature in the range of the tempering temperature of the first nozzle body element (1) is supplied to an assembly area (5). The assembly area (5) is defined between the second nozzle body element (3) and the first nozzle body element (1). The assembled first nozzle body element (1) and second nozzle body element (3) is subjected to tempering during which the tempering temperature of the first nozzle body element (1) is reached.
摘要:
The injection valve has a housing and a cavity with a fluid inlet portion and a fluid outlet portion, a valve needle axially movable in the cavity, the valve needle preventing a fluid flow in a closing position and releasing the fluid flow in further positions, and a spring element mechanically coupled to the needle and designed to exert an axial force on the needle. The adjusting and filter arrangement is arrangeable in the cavity between the inlet and outlet portion and has a filter element formed as a filtration body block and designed to filter the fluid, an adjusting element rigidly coupled to the housing and to preload the spring element and formed as an outer casing for the filter element, and a spring guiding element extending in axial direction and engaging the spring element, wherein the adjusting element and the spring guiding element form a one-piece element.
摘要:
A coupling arrangement for coupling a fuel injector to a fuel rail of a combustion engine, has a fuel injector cup having a central longitudinal axis and is coupled to the fuel rail at a first axial end area of the fuel injector cup, a housing of the fuel injector being arranged at the central longitudinal axis facing a second axial end area of the fuel injector cup, an O-ring seal being arranged between the housing and the fuel injector cup at an axially overlapping area of the fuel injector cup and the housing, a back-up ring being arranged at least partly circumferentially the housing such as to prevent the O-ring seal to be released from the housing, and a separating element being arranged at least partly circumferentially the housing between the O-ring seal and the back-up ring to prevent a contact of the O-ring seal with the back-up ring.
摘要:
Disclosed is a fuel injection nozzle assembly comprising a poppet type valve assembly capable of producing a circumferential spray pattern. The fuel injection nozzle assembly includes a nozzle body defining a valve outlet into which is fitted a needle valve having a flanged portion extending from the nozzle body. The flanged portion opens and closes the valve outlet as the needle valve travels up and down the nozzle body as dictated by the fuel pressure within the nozzle body. The flanged portion may further direct the fuel spray into a combustion chamber.
摘要:
A fuel injector for delivering fuel to an internal combustion engine. The fuel injector includes a fuel injector housing, a system for metering vaporized fuel to the internal combustion engine, the system positioned within the fuel injector housing, and a system for delivering an atomized stream of liquid fuel to an internal combustion engine, the system positioned within the fuel injector housing, wherein the fuel injector is operable to transition from metering vaporized fuel to delivering an atomized stream of liquid fuel to an internal combustion engine. The system for metering vaporized fuel includes at least one capillary flow passage, the at least one capillary flow passage having an inlet end and an outlet end; a heat source arranged along the at least one capillary flow passage, the heat source operable to heat the liquid fuel in the at least one capillary flow passage to a level sufficient to change from the liquid state to a vapor state and deliver a stream of vaporized fuel from the outlet end of the at least one capillary flow passage. The system for metering vaporized fuel further includes a valve for metering vaporized fuel located downstream to the outlet end of the at least one capillary flow passage. The fuel injector is effective in reducing cold-start and warm-up emissions of an internal combustion engine.
摘要:
A split phase fuel conditioner (10) includes a main body 20 defining an ignition chamber (22). A transfer passage (24) is in fluid communication between the ignition chamber (22) and main combustion chamber (14) of an engine (12) to which the conditioner is coupled. A first valve (28) selectively opens and closes a throat (26) of the transfer passage (24) to control fluid communication between the ignition chamber (22) and main combustion chamber (14). A first injector (30) is coupled to the main body (20) for injecting the first fuel volume into ignition chamber (22). A second fuel injector (32) which is carried by, but operated independently of, the first valve (28), injects a second volume of fuel directly into the transfer passage (24). Initially, the injector (30) injects the first fuel volume into the ignition chamber (22) where it is ignited to form an ignition plasma. Prior to opening valve (28), the second fuel injector (32) injects a second fuel volume into the transfer passage (24). The valve (28) is then opened allowing the ignition plasma to condition the second fuel volume by raising its temperature above its self-ignition temperature vaporising the second fuel volume. The ignition plasma then sweeps the conditioned second fuel volume into the combustion chamber (14) where it seeks out further oxygen within the combustion chamber (14) and combusts in a controlled manner.