14results about "Fluid pressure injection control" patented technology

A fuel injector (1) is disclosed comprising a needle (15) a fuel supply port (17) fluidly connected to a fuel cavity (13) and a control valve arrangement (3) comprising a control valve (4) fluidly connected to the fuel cavity (13). The control valve arrangement (3) comprises an armature assembly (6) connected to the control valve (4) via a valve control portion (6′) of the armature assembly (6). The control valve arrangement (3) comprises an armature actuator (7) configured to move the armature assembly (6) to cause a lift of the needle (15) from a valve seat (12) and a movement limiting assembly (9, 9′, 9″, 9′″) configured to limit the movement of the valve control portion (6′) upon activation. The movement limiting assembly (9, 9′, 9″, 9′″) is configured to be activated by changing the polarity of the electricity supplied to the armature actuator (7). The present disclosure further relates to an internal combustion engine (40) and a vehicle (2).

Fuel injection device with: a valve body (40) in which a high-pressure fuel passage is provided, the valve body having an injection opening (44) at a tip from which the high-pressure fuel is injected into a combustion chamber of an internal combustion engine; a valve element (60) which is movable in the valve body in its axial direction and opens or closes the injection opening; a pressure control chamber (53) provided in the valve body on a side opposite the injection port with respect to the valve element, which introduces the high-pressure fuel and controls the movement of the valve element by means of the fuel pressure; an inlet channel (52) through which the high-pressure fuel is introduced into the pressure control chamber; an outlet channel (54) through which the fuel is discharged from the pressure control chamber to an outer low-pressure side; and a control element (70) which is present in the valve body in its axial direction and opens or closes the inlet channel, wherein the valve body includes a cylindrical inner wall portion (356a) defining the pressure control chamber in its radial direction, and the cylindrical inner wall portion includes a connecting groove (357a) connecting an inlet chamber (53a) provided in the pressure control chamber on one side of the inlet channel with respect to the control element with a back pressure chamber (53b) provided in the pressure control chamber on one side of the valve element with respect to the control element, wherein the valve body is provided with a restricting portion (358a) opposite an end face of the control element on a side of the back pressure chamber, and the restricting portion is provided with a sub-connecting groove (357g) which, together with the connecting groove (357a), connects the inlet chamber to the back pressure chamber and ensures the flow of fuel from the inlet chamber (53a) to the back pressure chamber (53b).

The fuel injector (10.1) includes a housing with a nozzle body having a control fluid inlet, a fuel inlet, and an injection seat; a high-pressure control chamber (32) located within the housing and connected to the control fluid inlet; a fuel chamber (22) located within the housing and extending from the fuel inlet to the injection seat; a nozzle body (10.1) connected to the control fluid inlet; and a fuel chamber (22) located within the housing and extending from the fuel inlet to the injection seat; a control piston (51) located within the housing and adjustable along a longitudinal axis (L), on which a control pressure spring having a closing force toward the injection seat acts; a hydraulic control device for adjusting the control piston along the longitudinal axis; and a nozzle needle located at the end of the control piston facing the injection seat and configured to cooperate with the injection seat to inject fuel into the combustion chamber of an internal combustion engine, the nozzle needle being movable by adjusting the control piston along the longitudinal axis.

A fuel injector (1) is disclosed comprising a needle (15) a fuel supply port (17) fluidly connected to a fuel cavity (13) and a control valve arrangement (3) comprising a control valve (4) fluidly connected to the fuel cavity (13). The control valve arrangement (3) comprises an armature assembly (6) connected to the control valve (4) via a valve control portion (6′) of the armature assembly (6). The control valve arrangement (3) comprises an armature actuator (7) configured to move the armature assembly (6) to cause a lift of the needle (15) from a valve seat (12) and a movement limiting assembly (9, 9′, 9″, 9′″) configured to limit the movement of the valve control portion (6′) upon activation. The movement limiting assembly (9, 9′, 9″, 9′″) is configured to be activated by changing the polarity of the electricity supplied to the armature actuator (7). The present disclosure further relates to an internal combustion engine (40) and a vehicle (2).

Described is a fuel injection valve (10.1) comprising: a housing having a control fluid inlet, a fuel inlet and a nozzle body with an injection valve seat; a high pressure control chamber (32) arranged in the housing and connected to the control fluid inlet; a fuel chamber (22) arranged in the housing and extending from the fuel inlet to the injection valve seat; a control piston (51) which is arranged in the housing and which can be adjusted along a longitudinal axis (L) and which is acted upon by a control pressure spring with a closing force towards the injection valve seat; the hydraulic control device is used for controlling the control piston to adjust along the longitudinal axis; a nozzle needle arranged at an end of the control piston facing the injection valve seat, the nozzle needle being designed to interact with the injection valve seat to inject fuel into a combustion chamber of the internal combustion engine, the nozzle needle being movable by adjusting the control piston along the longitudinal axis.

A fuel injector (1) is disclosed comprising a needle (15) a fuel supply port (17) fluidly connected to a fuel cavity (13) and a control valve arrangement (3) comprising a control valve (4) fluidly connected to the fuel cavity (13). The control valve arrangement (3) comprises an armature assembly (6) connected to the control valve (4) via a valve control portion (6') of the armature assembly (6). The control valve arrangement (3) comprises an armature actuator (7) configured to move the armature assembly (6) to cause a lift of the needle (15) from a valve seat (12) and a movement limiting assembly (9, 9', 9'', 9''') configured to limit the movement of the valve control portion (6') upon activation. The movement limiting assembly (9, 9', 9'', 9''') is configured to be activated by changing the polarity of the electricity supplied to the armature actuator (7). The present disclosure further relates to an internal combustion engine (40) and a vehicle (2).

A gaseous fuel injector comprising a gas delivery chamber 48 and housing body 22 defining a working fluid chamber 34 and needle guide bore 24. A valve needle 12 is movable within the guide bore, where

A fuel injector for delivering gaseous fuel to an internal combustion engine comprises: a nozzle body having a nozzle bore; a first valve needle received within the nozzle bore and engageable with a first valve seat to control gaseous fuel delivery through at least one outlet of an injection nozzle; a first actuator arrangement for controlling movement of the first valve needle;a second valve needle engageable with a second valve seat to control gaseous fuel delivery through at least one outlet of the injection nozzle; and a second actuator for controlling movement of the second valve needle. The second valve seat is defined by the first valve needle, which defines an internal flow path for gaseous fuel flow when the second valve needle is lifted from the second valve seat and the first valve needle is lifted from the first valve seat.

Injection valve (1) for injecting fluid into a combustion chamber of an internal combustion engine, comprising - an injector body (2) with a fluid inlet (3) and a fluid outlet; - a nozzle body (4) with a recess (5) hydraulically coupled to the fluid inlet (3), in which recess a nozzle needle (6) is arranged to be axially movable, wherein the nozzle needle (6) in a closed position prevents a fluid flow through an injection opening (7) of the nozzle body (4) and otherwise releases it; - a control chamber (8) which is hydraulically coupled to the fluid inlet (3) and the nozzle needle (6); - a control valve (9) with a valve body (10) and a valve chamber (11) which is hydraulically coupled to the control chamber (8), wherein the valve chamber (11) can be hydraulically coupled to the fluid outlet depending on a closed position of the valve body (10); - an actuator (12) which can be coupled to the valve body (10) for actuating the control valve (9), wherein the valve body (10) is additionally directly coupled to the control chamber (8) in such a way that a force component which depends on a pressure prevailing in the control chamber (8) can be transmitted to the valve body (10);characterized in that a central bore is provided in the valve body (10), in which bore a coupling pin (31) is provided, wherein the coupling pin (31) defines a coupling volume (32) with the valve body (10) in the central bore, wherein two radial bores (33) are formed in the valve body (10), which connect the valve chamber (11) to the sealing gap between the coupling pin (31) and the valve body, and in that a mechanical coupling element (24) is provided for transmitting the force component, wherein an end (25) of the coupling element (24) assigned to the valve chamber (11) cooperates mechanically with the valve body (10) and an end (26) of the coupling element (24) facing away from the valve body (10) is hydraulically coupled to the control chamber (8);

The invention relates to a fuel injection valve (10.1), comprising: a housing which has a control fluid inlet, a fuel inlet and a nozzle body having an injection valve seat; a high-pressure control chamber (32) which is arranged in the housing and is connected to the control fluid inlet; a fuel chamber (22) which is arranged in the housing and extends from the fuel inlet to the injection valve seat; a control piston (51) which is arranged in the housing in a displaceable manner along a longitudinal axis (L) and to a which a closing force directed towards the injection valve seat can be applied by a control pressure spring; a hydraulic control device for controlling the displacement of the control piston along the longitudinal axis; a nozzle needle which is arranged at an end of the control piston facing the injection valve seat and which is designed to interact with the injection valve seat in order to inject fuel into the combustion chamber of the internal combustion engine, wherein the nozzle needle can be moved by displacement of the control piston along the longitudinal axis.

A fuel injection device (100) includes a control body (40) which is provided with an injection port (44), a nozzle needle (60) which opens or closes the injection port (44), a pressure control chamber (53) for controlling a movement of the nozzle needle (60), an inlet channel (52) through which high-pressure fuel is introduced into the pressure control chamber (53), an outlet channel (54) through which the fuel is discharged from the pressure control chamber (53), and a floating plate (70) which opens or closes the inlet channel (52).In the fuel injection device (100), the control body (40) includes a cylinder (56) which defines the pressure control chamber (53) in the radial direction, and an inner wall section (56a) of the cylinder (56) includes a connecting groove (57a) which connects an inlet chamber (53a) provided in the pressure control chamber (53) on one side of the inlet channel (52) with respect to the floating plate (70), with a back pressure chamber (53b) provided in the pressure control chamber (53) on one side of the nozzle needle (60) with respect to the floating plate (70).

Fuel injection valve, comprising: a valve body (50) movably received in a nozzle body (30) for opening or closing an injection port (32); a pressure control chamber (71) for applying a fuel pressure to the valve body (50) in a valve body closing direction; a fixed plate (20) having a high-pressure passage (22) for supplying high-pressure fuel to the pressure control chamber (71) so as to move the valve body (50) in the valve body closing direction, and wherein the fixed plate (20) has a low-pressure passage (23) for discharging fuel from the pressure control chamber (71) so as to move the valve body in a valve body opening direction, and the fixed plate (20) has a lower end surface (25a, 25b, 26a, 26b) on which a high-pressure port (22b) connected to the high-pressure passage (22) and a low-pressure port (23c) connected to the low-pressure passage (23) are formed such that the high-pressure port (22b) surrounds the low-pressure port (23c); and a movable plate (80) movably received in the pressure control chamber (71), wherein the movable plate (80) is brought into contact with the lower end surface (25a, 25b, 26a, 26b) of the fixed plate (20) when the fuel is discharged from the pressure control chamber (71) so as to close the high-pressure port (22b), and the movable plate (80) is separated from the lower end surface (25a, 25b, 26a, 26b) of the fixed plate (20) when the high-pressure fuel is supplied to the pressure control chamber (71) so as to open the high-pressure port (22b), wherein the lower end surface has a first wall portion (25) surrounding the low-pressure port (23c) and formed between the low-pressure port (23c) and the high-pressure port (22b), the first wall portion (25) having a first contact surface (25a, 25b) for separating the high-pressure port (22b) from the low-pressure port (23c) in a plate-contact state in which the movable plate (80) is in contact with the fixed plate (20), wherein the lower end surface has a second wall portion (26) surrounding the high-pressure port (22b) and formed on an outer side of the high-pressure port (22b), the second wall portion (26) having a second contact surface (26a, 26b) for separating the high-pressure port (22b) from the outer side of the high-pressure port (22b) in the state of plate contact, wherein the movable plate (80) has a first sealing surface (82a) for sealing a space between the first contact surface (25a, 25b) and the first sealing surface (82a) in the state of plate contact, and the movable plate (80) has a second sealing surface (82b) for sealing a space between the second contact surface (26a, 26b) and the second sealing surface (82b) in the state of plate contact, and wherein a first groove (25m) is formed as a binding force reducing groove on the first contact surface (25a, 25b) to receive a part of the fuel when the movable plate (80) is brought into contact with the fixed plate (20), and a second groove (26m) is formed as a binding force reducing groove on the second contact surface (26a, 26b) to receive another part of the fuel when the movable plate (80) is brought into contact with the fixed plate (20), so that a binding force generated between the movable plate (80) and the fixed plate (20) is reduced when the movable plate (80) is separated from the fixed plate (20).

A fuel injection device for an engine is disclosed. The fuel injection device may comprise a fuel nozzle with at least one injection metering port, and further a needle element which is movable within the fuel nozzle between a first position in which the needle element prevents fuel flow, and a second position in which the fuel flow is substantially unobstructed. The fuel injection device may also comprise a control chamber located at a base end of the needle element, a body, and a control valve which is arranged within the body and is movable to selectively drain the control chamber, thereby causing the needle element to move between the first and second positions.The fuel injection device may further have an armature located within an armature cavity of the body and selectively excited to move the control valve, and a pressure reduction device located within the body and configured to reduce the pressure of the armature cavity.

A fuel injector of a fuel injection system for delivering gaseous fuel to an internal combustion engine, the fuel injector comprising a working fluid chamber (34), a gas delivery chamber (48) and a needle guide bore (24) extending from the working fluid chamber (34) to the gas delivery chamber (48), wherein the gas delivery chamber (48) communicates with a fuel injector outlet (20) for delivering the gaseous fuel to the internal combustion engine. A valve needle (12) is movable within the needle bore (24) along a needle axis to open and close the outlet (20), wherein a gap is defined between an outer surface of the valve needle (12) and an inner surface of the needle bore (24). A biasing spring (50) acts on the valve needle (12) to urge the valve needle (12) to close the fuel injector outlet (20). A spring abutment member (54; 72) is provided for one end of the biasing spring (50). An annular seal (62, 90) is cooperable with the spring abutment member (54; 72) so that a force of the biasing spring (50) is transmitted to the annular seal (62; 90) through the spring abutment member (54; 72), to urge the annular seal into engagement with an outer surface of the valve needle (12).