Devices and methods are provided for stabilizing fasteners post-deployment. Devices and methods are also provided for facilitating ejection of surgical fasteners from a cartridge. Devices and methods are also provided for guiding surgical fasteners. Devices and methods are also provided for facilitating closing and clamping of an end effector of a surgical device. Devices and methods are also provided for securing fasteners and adjunct materials to tissue. Devices and methods are also provided for removably coupling a cartridge to an end effector of a surgical device. Devices and methods are also provided for locking a surgical device based on loading of a fastener cartridge in the surgical device. Devices and methods are provided for adjusting a tissue gap of an end effector of a surgical device. Devices and methods are also provided for manually retracting a drive shaft, drive beam, and associated components.

Devices and methods for facilitating ejection of surgical fasteners from cartridges

Embodiments are directed to portable infusion devices, systems, and methods of using the same for dispensing materials. In some cases, the devices, systems and methods may be used for infusing a material such as medicament, e.g., insulin, into a body in need thereof.

Infusion pump system with disposable cartridge having pressure venting and pressure feedback

The invention relates to a fuel-injection valve, in particular a high-pressure injection valve for directly injecting fuel into a combustion chamber of a compressed-mixture, spark-ignition internal combustion engine. Said valve is characterised in that an outlet opening (23) is provided downstream of the valve seat (20), the downstream end of said opening having a slit-forming element (30) that to a great extent closes the outlet opening (23). A slit-type flow outlet (35), through which a fuel spray can be discharged in a fan-type jet, is formed between the slit-forming element (30) and a front face (34) of the valve seat body (16).

Fuel-injection valve

A high-pressure fuel pump, comprising a cylinder having a pressurizing chamber and a plunger inserted into the cylinder, wherein the plunger is reciprocated in axial direction by a lifter to pressurize the fuel inside the pressurizing chamber, a seal member surrounds the portion of the plunger projected from the cylinder, cuts out a cylinder side space surrounded by the seal member from a lifter side space on the outside of the seal member, and comprises an annular lip part in contact with the outer peripheral surface of the plunger, the annular lip part further comprises a pair of lips moving apart from each other in the axial direction of the plunger, and the axial distance between both lips is larger than the stroke of the plunger, whereby fuel does not invade into the lifter side space, and the lubricating oil lubricating the lifter does not invade into the cylinder side space.

High-pressure fuel pump

The invention relates to a fuel-injection valve (1) comprising an actuator (2), which is located in an actuator housing (13) that is connected on the side of a valve needle to a valve body (5, 6) by means of a non-positive fit. The actuator (2) is supported on the opposite end (8) of the actuator housing (13) to said connection. A compensatory section (3) of the actuator housing (13) consists of a material with negligible or a negative thermal expansion, so that the thermal expansion of the actuator housing (13) and the valve body (5) in succession reaching as far as a valve seal seat, corresponds approximately to the thermal expansion of the actuator (2) and transmission elements (12) reaching as far as the valve seal seat. The exterior of the actuator housing (13) is radially surrounded by a fuel chamber that is traversed by fuel.

A method for operating a valve, in particular a fuel injector of an internal combustion engine of a motor vehicle, in which an auxiliary variable is obtained as a function of at least one electrical operating variable of an electromagnetic actuator driving a component of the valve, in particular a valve needle, and in which the auxiliary variable is checked for the presence of a predefinable characteristic. A reference variable which characterizes the operating behavior of the electromagnetic actuator is ascertained, the auxiliary variable is modified as a function of the reference variable to obtain a modified auxiliary variable, and the modified auxiliary variable is checked for the presence of the predefinable characteristic.

Method And Control Unit For Operating A Valve

A solenoid valve including a magnet armature having an armature disk and an armature bolt that is guided in a sliding part. In order to prevent a postoscillation of the armature disk after a closing of the solenoid valve, a damping device is provided on the magnet armature. With a device of this kind, a required short switching time of the solenoid valve can be precisely maintained. The solenoid valve (30) is designated for use in fuel injection systems with a common rail.

Solenoid valve for controlling an electrically controlled fuel ignition valve

A fuel injector with a direct needle control for an internal combustion engine, having an actuator, a hydraulic booster, and a nozzle needle guided in a nozzle body and acting on a nozzle needle sealing seat. The hydraulic booster includes a booster piston connected to the actuator and a nozzle needle booster piston connected to the nozzle needle; a booster chamber in the form of an actuator coupler chamber is associated with a pressure surface of the actuator booster piston; and depending on the pressure in the actuator coupler chamber, the nozzle needle is lifted away from the nozzle needle sealing seat, thus initiating an injection. In addition to the actuator booster piston, a control element is provided that is able to execute a stroke motion, is hydraulically coupled to the actuator coupler chamber by means of a first control surface, and is associated with a control chamber by means of a second control surface. The actuator booster piston has a second pressure surface, which, as an additional control surface, is associated with the control chamber.

Fuel injector with direct needle control for an internal combustion engine

Die Erfindung betrifft ein Verfahren zum Betreiben eines Ventils (18a), insbesondere eines Kraftstoffeinspritzventils einer Brennkraftmaschine (10) eines Kraftfahrzeugs, bei dem eine bewegbar angeordnete Komponente des Ventils (18a), insbesondere eine Ventilnadel (28), mittels eines elektromagnetischen Aktors (26, 30) angetrieben wird. Erfindungsgemas wird in Abhangigkeit einer einzuspritzenden Fluidmenge (q), insbesondere Kraftstoffmenge, eine Ansteuerbetriebsart zur Ansteuerung des Aktors so gewahlt, dass ein eindeutiger Zusammenhang zwischen der einzuspritzenden Kraftstoffmenge und einer Ansteuerdauer des Aktors besteht.

Verfahren und Steuergerät zum Betreiben eines Ventils

A method for operating an injector, in particular of an internal combustion engine of a motor vehicle, in which a component of the injector, in particular a valve needle, is driven with the aid of an electromagnetic actuator. According to the present invention, a variable which characterizes the acceleration of a movable component of the electromagnetic actuator, in particular of an armature of the electromagnetic actuator, is formed as a function of at least one electrical operating variable of the electromagnetic actuator, and an operating state of the injector is deduced as a function of the variable which characterizes the acceleration.

Holger Rapp

Papers

Method And Control Unit For Operating A Valve

Solenoid valve for controlling an electrically controlled fuel ignition valve

Fuel injector with direct needle control for an internal combustion engine

Verfahren und Steuergerät zum Betreiben eines Ventils

Method for operating an injector