摘要:
The invention relates to a fuel injection valve which comprises a housing (1) with a valve seat (20) configured therein and an interior valve needle (17) and an exterior valve needle (15). The pressure in an exterior control chamber (56) exerts a closing force onto the exterior valve needle (17) and the pressure in an interior control chamber (54) exerts a corresponding closing force onto the interior valve needle (15). The interior control chamber (54) is linked with a control valve chamber (60) of a control valve (30) via an interior outlet throttle (51) and the exterior control chamber (56) via an exterior outlet throttle (49), a valve member (62) being disposed in said control valve chamber (60). The interior control chamber (54) is linked with a high-pressure area (8) via an interior inlet throttle (47) and the exterior control chamber (56) via an exterior inlet throttle (45). The valve member (62) can assume a first, a second and a third switched position so that the pressure in the control chambers (54; 56) can be controlled to open only the exterior valve needle (17) as well as both valve needles (15; 17).
摘要:
The invention relates to a fuel injection valve which comprises a housing (1) with a valve seat (20) configured therein and an interior valve needle (17) and an exterior valve needle (15). The pressure in an exterior control chamber (56) exerts a closing force onto the exterior valve needle (17) and the pressure in an interior control chamber (54) exerts a corresponding closing force onto the interior valve needle (15). The interior control chamber (54) is linked with a control valve chamber (60) of a control valve (30) via an interior outlet throttle (51) and the exterior control chamber (56) via an exterior outlet throttle (49), a valve member (62) being disposed in said control valve chamber (60). The interior control chamber (54) is linked with a high-pressure area (8) via an interior inlet throttle (47) and the exterior control chamber (56) via an exterior inlet throttle (45). The valve member (62) can assume a first, a second and a third switched position so that the pressure in the control chambers (54; 56) can be controlled to open only the exterior valve needle (17) as well as both valve needles (15; 17).
摘要:
The invention relates to a magnetic actuator (111) for a conveying unit (110), in particular a diaphragm pump for an operating medium/auxiliary medium in a vehicle, comprising a spring-loaded armature (118), which extends through a solenoid (14) and acts on a diaphragm (117), wherein the diaphragm can act on a working space (120) of the conveying unit and/or can cover or uncover a sealing seat (48) of a valve (130), wherein the diaphragm (117) is connected to the armature by means of an intermediate layer (119).
摘要:
The invention relates to a solenoid valve (10) comprising a magnet assembly (12) and a magnetic top in which a magnetic coil (16) is embedded. The solenoid valve (10) also comprises an armature assembly with an armature bolt (22) and/or armature plate (24) in one or many parts. Said armature plate (24) has, in a radially inner area, a recess (42) that surrounds said area and that defines the height of the residual air gap (52).
摘要:
The fuel injection device is provided with a high-pressure fuel pump (10) with a pump working chamber (22) and a fuel injection valve (12) connected thereto for each cylinder of the internal combustion engine. An electrically actuated control valve (60) is used to set up a connection between the pump working chamber (22) and a discharge chamber (24). The fuel injection device (12) comprises a first injection valve member (28) which is controlled by at least one injection opening (32) and inside of which a second injection valve member (128) is displaceably guided, enabling at least one second injection opening (132) to be controlled. The second injection valve member (128) is directly impinged upon by pressure prevailing in a fuel-filled control pressure chamber (24) in the direction of closing. The control chamber (54) is provided with a valve(72; 172)-controlled connection (70; 170) to a pressure area (71; 171) wherein a delayed pressure build-up or decrease in pressure occurs in relation to the pump working chamber (22) during closing or opening of the control valve (60).The valve (72; 172) has a valve member (76, 80; 176) which, in the direction of opening, is imposed upon by the pressure prevailing in the pressure chamber (71; 171) and which is imposed upon by the pressure prevailing in the pump working chamber (22) in the direction of closing.
摘要:
A fuel injection device (20) for a combustion engine comprises a first valve element (36) with a pressure surface (38) that acts in an opening direction. An impinging device (50) acts in a closing direction. A second valve element (34) comprises a hydraulic control surface (58), which acts in the closing direction and which delimits a hydraulic control space (60). A corresponding impinging device acts in an opening direction. In addition, a high-pressure connection (24) is provided. The invention provides that the fuel injection device (20) has an additional valve device (66) that, in a first final position, connects the pressure space (40) only to the low pressure connection (28) and connects the control space (60) only to the high pressure connection (24). In a second final position, the additional valve device (66) connects the pressure space (40) only to the high pressure connection (24) and separates the control space (60) essentially from the high pressure connection (24). In an intermediate position, the pressure space (40) is connected only to the high pressure connection (24), and the control space (60) is simultaneously connected to the high pressure connection (24) and to the low pressure connection (28).
摘要:
The invention relates to a fuel-injection valve comprising a nozzle module (12). An outer nozzle needle (24), which co-operates with a first injection orifice (32) and is surrounded by a high-pressure chamber (20) that is connected to a fuel-supply channel (62) and an inner nozzle needle (26), which co-operates with at least one second injection orifice (34) and is guided in a channel that axially penetrates the outer nozzle needle (24), are configured in said module to be axially displaced. The fuel-injection valve also comprises a valve-type valve control module (12), which controls the fluid pressure prevailing in a valve control chamber (36) that is equipped with an input throttle (64) and an output throttle (68). The level of the fluid pressure defines the position of the outer nozzle needle (24) and the inner nozzle needle (26). The outer nozzle needle (24) has at least one transverse channel (46), via which fuel can be conducted from the high-pressure chamber (20) to the periphery and the inner pressure stage (50) of the inner nozzle needle (26).
摘要:
The invention relates to a device for injecting fuel into the combustion chambers of an internal combustion engine. Said device comprises a pump (2) which supplies a high-pressure collecting chamber (3) with fuel under high pressure. A high pressure supply line leads from said chamber to an injector (5) containing a metering valve (7) which pressurises an injection nozzle (24) by means of fuel. A damper throttle (26) is associated with the metering valve (7) and is connected to part of the high-pressure region.
摘要:
The invention relates to an injection nozzle (1) for an internal combustion engine, particularly in a motor vehicle. A first nozzle needle (3) controls at least one first injection hole (5) while a second nozzle needle (4) controls at least one second injection hole (6). A control chamber (32) is connected to a pressure chamber (34) via a throttle line (32), an injection pressure being adjustable inside said pressure chamber (34). A first control piston (41) cooperates with a first combination of needles (17) encompassing the first nozzle needle (3) and can be impinged upon on a first control surface (43) by the control pressure prevailing in the control chamber (32). An axial play (44) is embodied between the first control piston (41) and the first combination of needles (17) in the closed position of the first nozzle needle (3). A second control piston (42) cooperates with a second combination of needles (30) encompassing the second nozzle needle (4) and can be impinged upon on a second control surface (45) by the control pressure. The second control piston (42) leans on the second combination of needles (30) in a closed position of the second nozzle needle (4).
摘要:
Disclosed is a fuel injection device comprising a high-pressure fuel pump (10) and a fuel injection valve (12) that is connected thereto and is provided for each cylinder of the internal combustion engine. Said high-pressure fuel pump (10) comprises two pump pistons (18, 118) that are driven by the internal combustion engine in a lifting movement and define a pump working chamber (22) to which fuel is fed from a fuel reservoir (24). A second pump piston is guided in an at least approximately coaxially displaceable manner within a first pump piston (18). Both pump pistons (18, 118) can optionally be coupled to each other such that said pistons (18, 118) move as a unit during a delivery stroke, or the second pump piston (118) can be fixed in a passive position such that only the first pump piston (18) performs a delivery stroke. The fuel injection valve (12) is provided with two injection valve members (28, 128), a second injection valve member (128) which is at least indirectly impinged upon by the pressure prevailing in a control pressure chamber (52) being guided in a displaceable manner within the first injection valve member (28). The control pressure chamber (52) is provided with a connection (53) to the pump working chamber (22), which is controlled by the second pump piston (118), the control pressure chamber (52) being separated from the pump working chamber (22) if the second pump piston (118) is placed in the passive position.