Abstract:
A liquid injection apparatus is provided which is capable of uniformly atomizing and injecting liquid such as fuel even if the surrounding environment changes significantly. A liquid injection apparatus 10 comprises an injection unit 14 fixed to a liquid injection space 21 defined by, e.g., a suction pipe 20 of an internal combustion engine, and a pressurizing pump 11 for pressurizing liquid from a liquid storage tank 22 up to a pressure to supply the liquid to the injection unit and to inject the liquid into the space. The injection unit comprises, in order to atomize the liquid supplied by the pressurizing pump, a plurality of chambers in which a piezoelectric/electrostrictive element is formed at least on its wall surface, and a plurality of liquid ejection nozzles. Vibration energy induced by the piezoelectric/electrostrictive element is given to the pressurized liquid in the chamber of the injection unit, and the liquid is atomized and injected into the liquid injection space from the extremity of the liquid ejection nozzle.
Abstract:
An ultrasonic fog generator creates a fog of a liquid such as water. The visual appearance of the fog may be altered such as by being illuminated by one or more lights having one or more colors. Further, the fog may be used to deliver pharmaceuticals to one or both of the lungs of a patient.
Abstract:
A first embodiment of the present invention provides a vortex generator in the form of a flexible piezoelectric actuator blade disposed in a wall of a flowpath, such as an airfoil. Another embodiment provides a synthetic jet actuator in which a pair of bimorph piezoelectric plates are connected by a flexible hinge.
Abstract:
A valve assembly suitable in particular for a fuel injection system of an internal combustion engine is proposed, which includes an adjustably disposed valve element, an actuator unit, in particular a piezoelectric actuator unit, for adjusting the valve element, and a hydraulic force transmission chamber disposed in the force transmission path between the actuator unit and the valve element. For diverting at least one hydraulic filling stream, to be delivered to the force transmission chamber for filling it, from a hydraulic mainstream, a hydraulic pressure distributor assembly (50b, 52b) is provided, which has a conduit system (46b, 48b) that is embodied in a conduit housing (14b) and has both a main conduit (46b), carrying the hydraulic mainstream, and at least one filling conduit (48b), branching off from the main conduit (46b) and carrying the hydraulic filling stream. The pressure distributor assembly (50b, 52b) forms one hydraulic throttling region (50b, 52b) for the hydraulic mainstream each on both sides of the branching point of the filling conduit (48b) from the main conduit (46b). At least one of the throttling regions (50b, 52b) is embodied as a throttle bore.
Abstract:
A valve for regulating fluids includes a piezo actor (2), a converter (3) for converter the stroke of the piezo actor, an inwardly opening control valve (11), which is disposed in a valve chamber (12) and on a first valve seat (14), closes a connection to a low-pressure line (18). A nozzle needle (20) is disposed in the control chamber (21). The control chamber (21) is connected with a high-pressure line (19) via a first supply throttle (22) and with the valve chamber (12) by means of a throttle (23), whereby the valve chamber (12) is connected with the high-pressure line via a second supply throttle (24), in order to make possible a fast closing of the valve.
Abstract:
An injector for controlling fluids has a piezoelectric actuator and a hydraulic pressure intensifier. The hydraulic pressure intensifier is composed of a first piston, a second piston and a pressure chamber filled with fluid and situated between the two pistons. In addition, a control valve and a priming device are provided to replace the fluid loss in the pressure chamber caused by leakage. The priming device has a priming chamber filled with fluid, and leakage losses in the pressure chamber are replaced by fluid from the priming chamber during a return movement of the hydraulic pressure intensifier as a result of a displacement effect in the priming chamber created directly or indirectly by the first piston.
Abstract:
Spa nozzles having dual fluidic nozzles capable of submerged operation and of selectively providing straight, concentrated, non-oscillating jets with air entrainment or an oscillating jet or slugs of water in water to provide a soothing massaging effect with no moving parts.
Abstract:
An improved magnetostrictive actuator is provided. The actuator includes combinations of magnetostrictive alloy compositions and prestress values to provide improved temperature response for automotive applications, such as fuel injectors, without the need for complex electronic controls.