Abstract: A gas injector for injecting a gaseous fuel directly into a combustion chamber of an internal combustion engine, having a valve closing element for releasing and closing a through-opening, a first seal seat between the valve closing element and a valve body, the first seal seat being a metallic seal seat having two metallic sealing partners, and having a second seal seat between the valve closing element and a stationary component, the second seal seat having at least one elastomer seal as sealing partner, the first seal seat being situated closer to the combustion chamber than is the second seal seat.

Abstract: A gas injector for injecting a gaseous fuel, in particular directly into a combustion chamber of an internal combustion engine, including: a valve closing element for opening or closing a pass-through opening, a valve body, and a sealing seat between the valve body and the valve closing element, in the case of a maximum lift of the valve closing element a flow cross section between the valve body and the valve closing element being smaller in the flow direction upstream from the sealing seat than a flow cross section between the valve closing element and the sealing seat and being smaller than a flow cross section in the flow direction downstream from the sealing seat.

Abstract: A gas injector for directly injecting a gaseous fuel into a combustion chamber of an internal combustion engine, including a valve closure element for releasing and closing a passage opening, the valve closure element opening in the direction of a flow direction of the gas injector, a sealing seat between the valve closure element and a valve body, a flow-guiding element being situated downstream of the sealing seat in the flow direction of the gas injector and configured to form a gas jet to be injected into the combustion chamber.

Abstract: A gas injector for injecting a gaseous fuel directly into a combustion chamber of an internal combustion engine includes a valve-closing element for releasing and sealing a through opening at a sealing seat; a shielding element, which is situated at an end of the valve-closing element on a side of the combustion chamber and which shields the valve-closing element and the sealing seat with respect to the combustion chamber; and a cooling ring having a first contact area designed for direct contact with the shielding element and a second contact area designed for direct contact with a component of the internal combustion engine, in particular with a cylinder head.

Abstract: A gas injector for injecting a gaseous fuel, in particular directly into a combustion chamber of an internal combustion engine, including: a valve closing element for opening or closing a pass-through opening, a valve body, and a sealing seat between the valve body and the valve closing element, in the case of a maximum lift of the valve closing element a flow cross section between the valve body and the valve closing element being smaller in the flow direction upstream from the sealing seat than a flow cross section between the valve closing element and the sealing seat and being smaller than a flow cross section in the flow direction downstream from the sealing seat.

Abstract: A gas injector for injecting a gaseous fuel directly into a combustion chamber of an internal combustion engine includes a valve-closing element for releasing and sealing a through opening at a sealing seat; a shielding element, which is situated at an end of the valve-closing element on a side of the combustion chamber and which shields the valve-closing element and the sealing seat with respect to the combustion chamber; and a cooling ring having a first contact area designed for direct contact with the shielding element and a second contact area designed for direct contact with a component of the internal combustion engine, in particular with a cylinder head.

Abstract: A gas injector for directly injecting a gaseous fuel into a combustion chamber of an internal combustion engine, including a valve closure element for releasing and closing a passage opening, the valve closure element opening in the direction of a flow direction of the gas injector, a sealing seat between the valve closure element and a valve body, a flow-guiding element being situated downstream of the sealing seat in the flow direction of the gas injector and configured to form a gas jet to be injected into the combustion chamber.

Abstract: A gas injector for injecting a gaseous fuel directly into a combustion chamber of an internal combustion engine, having a valve closing element for releasing and closing a through-opening, a first seal seat between the valve closing element and a valve body, the first seal seat being a metallic seal seat having two metallic sealing partners, and having a second seal seat between the valve closing element and a stationary component, the second seal seat having at least one elastomer seal as sealing partner, the first seal seat being situated closer to the combustion chamber than is the second seal seat.

Abstract: A valve for a cold gas generator for an airbag in a vehicle includes: a valve chamber; a control chamber; a control piston; an overflow channel; a retaining element; and a shutoff element. The valve chamber includes an inlet from the cold gas generator and an outlet to the airbag. The control piston separates the control chamber and the valve chamber. The control piston is movable between an open position and a closed position, the control piston releasing the outlet in the open position and closing it in the closed position. The control piston has (i) a first active piston surface on the side of the valve chamber, and (ii) a second active piston surface on the side of the control chamber. The first piston surface is smaller than the second piston surface. The overflow channel fluidically connects the valve chamber and the control chamber to one another.

Abstract: An activation device for a protection device includes: a body with a chamber that has, respectively at first and second ends, a medium inlet opening to a medium storage and a valve opening, and an outlet opening for discharging the medium into the protection device between the first and second ends; a valve for opening and closing the valve opening for passage of the medium; and a piston that (a) includes a passage along a main extension axis, from a first surface thereof adjacent to the medium inlet opening, to a second surface thereof, larger than the first surface and adjacent to the valve opening, and (b) is movable in the chamber by the medium and as a function of the control valve position between a position in which the at least one outlet opening is closed and a position in which the at least one outlet opening is opened.

Abstract: A valve for a cold gas generator for an airbag in a vehicle includes: a valve chamber; a control chamber; a control piston; an overflow channel; a retaining element; and a shutoff element. The valve chamber includes an inlet from the cold gas generator and an outlet to the airbag. The control piston separates the control chamber and the valve chamber. The control piston is movable between an open position and a closed position, the control piston releasing the outlet in the open position and closing it in the closed position. The control piston has (i) a first active piston surface on the side of the valve chamber, and (ii) a second active piston surface on the side of the control chamber. The first piston surface is smaller than the second piston surface. The overflow channel fluidically connects the valve chamber and the control chamber to one another.

Abstract: An activation device for a protection device includes: a body with a chamber that has, respectively at first and second ends, a medium inlet opening to a medium storage and a valve opening, and an outlet opening for discharging the medium into the protection device between the first and second ends; a valve for opening and closing the valve opening for passage of the medium; and a piston that (a) includes a passage along a main extension axis, from a first surface thereof adjacent to the medium inlet opening, to a second surface thereof, larger than the first surface and adjacent to the valve opening, and (b) is movable in the chamber by the medium and as a function of the control valve position between a position in which the at least one outlet opening is closed and a position in which the at least one outlet opening is opened.

Abstract: A device for injecting fuel includes an electrodynamic drive having a movably situated coil, an inwardly opening needle which opens and closes injection holes on a valve seat, a connecting element which connects the needle to the movably situated coil, and a pressure chamber which is situated at the needle upstream from the valve seat and contains pressurized fuel.

Abstract: A fuel system comprises a first reservoir for a first fuel in liquid phase that has a first vapor pressure, and a second reservoir for a second fuel in liquid phase that has a second vapor pressure. The second vapor pressure is higher than the first vapor pressure. The fuel system further includes a mixing device for mixing the first fuel in liquid phase with the second fuel in liquid phase, and an injector which is hydraulically connected to the mixing device and is configured so that as, or immediately after, the mixture passes through an outlet opening of the injector, the second fuel changes from the liquid phase to a gaseous phase.

Abstract: Conventional devices have a valve needle and a shape memory element which, by the application of a controllable magnetic field, executes a control stroke travel that operates the actuator, and having a coil that excites the magnetic field which is situated in a magnet housing which, at its end face, is bordered with respect to an actuating axis by a front wall in each case, the front walls having a through opening radially within the coil. It is a disadvantage that the magnetic field excited around the coil is conducted unfavorably, so that at most a slight magnetic field develops in the shape memory element. The shape memory element has a magnetic field flowing through it, in the direction of its longitudinal extension, if at all. Since the shape memory element has a high magnetic resistance and is developed to be very long in the axial direction, only a very weak magnetic field can be induced in the shape memory element.

Abstract: A device for injecting fuel includes an electrodynamic drive having a movably situated coil, an inwardly opening needle which opens and closes injection holes on a valve seat, a connecting element which connects the needle to the movably situated coil, and a pressure chamber which is situated at the needle upstream from the valve seat and contains pressurized fuel.

Abstract: A device for injecting pressurized fuel includes an electrodynamic actuator having a movably situated coil, an outwardly opening needle which opens and closes a cross section on a valve seat, a connecting device which connects the needle to the movably situated coil, a pressure chamber which is situated at the needle upstream from the valve seat and contains pressurized fuel, a low-pressure chamber from which, fuel is dischargeable, and a gap seal which is provided at an outer peripheral region of the needle, the gap seal (16) providing a connection between the pressure chamber and the low-pressure chamber.

Abstract: A fuel injector for the injection of fuel into the combustion chamber of an internal combustion engine includes a valve needle guided in a nozzle body, the valve needle being actuable by an actuator and acted upon by a restoring spring in such a manner that a valve-closure member which is in operative connection to the valve needle is retained in sealing contact against a valve-seat surface. Formed at a downstream-side end of the fuel injector is a projection which projects beyond the valve-closure member of the fuel injector.

Abstract: Conventional devices have a valve needle and a shape memory element which, by the application of a controllable magnetic field, executes a control stroke travel that operates the actuator, and having a coil that excites the magnetic field which is situated in a magnet housing which, at its end face, is bordered with respect to an actuating axis by a front wall in each case, the front walls having a through opening radially within the coil. It is a disadvantage that the magnetic field excited around the coil is conducted unfavorably, so that at most a slight magnetic field develops in the shape memory element. The shape memory element has a magnetic field flowing through it, in the direction of its longitudinal extension, if at all. Since the shape memory element has a high magnetic resistance and is developed to be very long in the axial direction, only a very weak magnetic field can be induced in the shape memory element.

Abstract: A fuel injector for the direct injection of fuel into the combustion chamber of an internal combustion engine includes a valve needle situated in a nozzle body, the valve needle being actuable by an actuator and acted upon by a restoring spring in such a manner that a valve-closure member which is in operative connection to the valve needle and faces the combustion chamber is kept in sealing contact with a valve-seat surface in the non-actuated state of the actuator. A first jet-opening angle ?1 is assigned to a first lift state of the valve needle and a second jet-opening angle ?2 to a second lift state of the valve needle.