Class / Patent application number | Description | Number of patent applications / Date published |
239088000 | UNITARY INJECTION NOZZLE AND PUMP OR ACCUMULATOR PLUNGER | 22 |
20080217428 | INJECTOR - A pressurizing piston has a head section, which contacts an axial end face of a piezoelectric actuator to receive displacement of the actuator, and a piston wall section, which is formed in a cylindrical shape and can move in an axial direction in response to the movement of the head section. The head section and the piston wall section are combined such that relative displacement therebetween is possible in a radial direction. An outer sleeve slidably holding an outer periphery of the piston wall section restricts radial movement of the head section. When an expansion-contraction direction of the actuator inclines with respect to the axial direction, inclination of the piston wall section is inhibited by a radial deviation caused between the head section and the piston wall section. Thus, pinching of the piston wall section to the outer sleeve is inhibited. | 09-11-2008 |
20080245891 | INJECTOR - In an injector, a first shaft portion of a needle is slidably supported by a first sleeves which is loosely received in a first internal chamber, and a second shaft portion of the needle is slidably supported in a body. Thereby, the first and second shaft portions are supported by the different members, and a relatively large clearance is formed on a radially outer side of the first sleeve. | 10-09-2008 |
20080265054 | Injector With A Pressure Intensifier That Can Be Switched On - An injector in which it is possible to switch a pressure booster on or off so that it is possible to control not only the injection duration, but also the progression of the injection pressure within a broad range during the injection. | 10-30-2008 |
20080315008 | Four wire elastomeric seal and fuel injector using same - A fuel injector includes first and second electrical actuators positioned within an injector body. First and second pairs of electrical conductors extend from a socket connector outside of the injector body to the first and second electrical actuators, respectively. The electrical conductors extend through an elastomeric sealing member that seals against fuel leakage from the fuel injector. The elastomeric sealing member provides annular sealing ridges in sealing contact with an access passage of the injector body and includes individual conductor seal passages that form seals around the outer surface of the individual electrical conductors. The elastomeric sealing member includes features that facilitate assembly of the fuel injector in a manner that reduces risk of damage to the sealing strategy. | 12-25-2008 |
20080315009 | Electronic unit injector with pressure assisted needle control - An electronically controlled fuel injector includes a reduced part count and complexity over similar fuel injectors without a substantial reduction in performance capabilities. This is accomplished by using a one-piece needle that is hydraulically balanced and biased toward a closed position with a spring positioned in the needle control chamber. Although subtle, this injector has some ability to control the fuel pressure when the needle valve is opening and closing by adjusting a relative timing of a pressure control valve opening relative to a needle control chamber, using separate electrical actuators. The disclosure is particularly applicable to fuel injectors that cycle through high and low pressure states during and between injection events, respectively. Cam actuated fuel injectors being particularly well suited. | 12-25-2008 |
20090008474 | Fuel nozzle apparatus, gas turbine, and method of controlling fuel nozzle apparatus - There are provided a fuel nozzle apparatus, a gas turbine, and a method of controlling a fuel nozzle apparatus, that prevent an occurrence of caulking while meeting the requirements of exhaust gas regulations. There are provided: a fuel pump that feeds fuel; a fuel flow passage formed with a circulation flow passage through which the fuel flows; a flow controller that controls a flow rate of the fuel flowing from the fuel pump into the circulation flow passage; a circulation pump that circulates the fuel within the circulation flow passage; a nozzle section formed with an injection nozzle that injects the fuel from the circulation flow passage to the outside; and an injection controller that controls an injection amount of the fuel to be injected from the injection nozzle. | 01-08-2009 |
20090152375 | Fuel injector - A fuel injection method according to the invention that utilizes an accumulator principle, particularly a common rail principle, is characterized in that fuel arriving from an accumulator, particularly a common rail, is conveyed to a primary side of the pressure booster at a first pressure such that a secondary side of the pressure booster is subjected to a pressure increase, and in that an opening and closing of an injection nozzle are realized with the pressure in a pressure chamber for the injection nozzle, by displacing a closing element that acts upon the injection nozzle, particularly an injector needle, by means of a hydraulically controlled pressure change. | 06-18-2009 |
20090212125 | Fuel Injector - A method and apparatus is disclosed for ejecting material. The ejected material is ejected as liquid and liquid vapour via an explosive process which can provide a very fast ejection as well as an ejection which has a large throw. The apparatus can be used to eject fuel for a fuel injector. | 08-27-2009 |
20090250531 | NON-GUIDED TAPPET AND FUEL INJECTOR USING SAME - A fuel injector includes an injector body having an internal surface and an external surface. A tappet assembly includes a non-guided tappet and a plunger assembly, and is mounted on the injector body. The tappet assembly is movable with respect to the injector body a displacement distance between an advanced position and an extended position. A portion of the plunger assembly is slidably guided along the internal surface of the injector body, while the non-guided tappet is free of contact with both the internal surface and the external surface of the injector body in the advanced and extended positions. The tappet assembly may be prevented from moving beyond the extended position using a snap ring positioned within a retention opening of the fuel injector body. | 10-08-2009 |
20090321536 | Piston having channel extending through piston head - A piston is disclosed. The piston may have a piston head, which may have an exterior surface. The exterior surface may have a top portion, an upper side portion, and a lower side portion. The piston may also have a groove formed in the lower side portion of the exterior surface. Additionally, the piston may have a channel extending from the groove through the piston head. The channel may also extend through at least one of the top portion or the upper side portion of the exterior surface. | 12-31-2009 |
20100282862 | PRESSURE WASHER WITH THROTTLE CONTROL - A pressure washer includes a frame and an engine coupled to the frame. The engine has a throttle configured to control the speed of the engine. The pressure washer also includes a pump attached to the frame. The pump includes a housing with an inlet and an outlet formed in the housing. A flow path extends between the inlet and the outlet. The pump has a through mode, permitting water to flow through the flow path. And, the pump has a bypass mode establishing a recirculation circuit. The pressure washer also includes a pressure-sensitive member positioned along the flow path and attached directly to the recirculation circuit when the pump is in the bypass mode. The pressure-sensitive member has a first response to a water pressure occurring during the bypass mode and a second response to a water pressure occurring during the through mode. The pressure washer further includes a line of communication between the pressure-sensitive member and the throttle. When the pressure-sensitive member has the first response, the throttle sets a first engine speed, and when the pressure-sensitive member has the second response, the throttle sets a second engine speed. | 11-11-2010 |
20120024980 | Multi-Layer Piezoelectric Element, and Injection Device and Fuel Injection System Comprising the Same - Provided is a highly durable multi-layer piezoelectric element wherein a conductive connection member is not broken even in the case of continuous driving for a long period in a high electric field under high pressure. | 02-02-2012 |
20120181351 | NOZZLE AND NEEDLE OF A HIGH-PRESSURE UNIT FUEL INJECTOR - A unit fuel injector ( | 07-19-2012 |
239089000 | Accumulator plunger biased to discharge fluid | 3 |
20080257980 | Fuel Injector - The invention relates to a fuel injector having an injector housing containing a pressure chamber from which highly pressurized fuel is injected into a combustion chamber of an internal combustion engine. A nozzle needle control chamber is provided in the housing such that a nozzle needle has its first end disposed in the nozzle needle control chamber. A second end of the nozzle needle lifts away from its seat as a function of the pressure in the nozzle needle control chamber. The pressure in the nozzle needle control chamber is controlled by a switching valve device which is equipped with a piezoelectric actuator that expands longitudinally when supplied with current. A valve piston is coupled to the piezoelectric actuator and has its free end of the disposed in a valve piston control chamber. The valve piston control chamber communicates with the nozzle needle control chamber. In the charged state of the piezoelectric actuator, the free end of the valve piston interrupts a hydraulic pressure-relief connection between the valve piston control chamber and a pressure-relief chamber. | 10-23-2008 |
20080296402 | Retention system - While ceramic materials possess properties that make them suitable for use in fuel system components, they tend to be susceptible to failure when exposed to tensile stresses. The retention system described herein helps to reduce the tensile stresses experienced by a retained member by providing a retained member with an engagement structure, a multi-piece retention ring that engages the engagement structure, a resilient member coupled to the retention ring, and a retainer coupled around at least a portion of the retention ring and resilient member and spaced apart from the retention ring and/or resilient member by a gap. The retained member, retention ring, resilient member, and retainer are configured so that the retention ring is moveable in an axial direction relative to the retained member and so that the movement of the retention ring acts to expand the resilient member against the bias provided by the resilient member. | 12-04-2008 |
20130126636 | INJECTION VALVE - An injection valve may comprise: an injector component having an injector body comprising a recess of the injector body extending in the direction of a longitudinal axis that can be hydraulically coupled to a high-pressure circuit of a fluid, and a nozzle needle axially displaceably disposed in the recess of the injector body, designed for preventing fluid flow through at least one injection opening in a closed position, and otherwise for releasing the fluid flow; an actuator unit disposed in a recess of the injector body and comprising an actuator housing in which an actuator element is disposed, and the actuator housing comprises an end face at an axial end facing the injection opening, said end face being mechanically coupled to a stage implemented in the injector body; and a ring element disposed axially between the end face and the stage. At least two radial through passages are disposed opposite each other in the ring element, designed for hydraulically coupling between a ring interior disposed within the ring element and a ring exterior disposed outside of the ring element. | 05-23-2013 |
239090000 | Plunger interconnected or mounted bypass | 3 |
20080290188 | FUEL INJECTOR NEEDLE HOUSING - A fuel injector for injecting fuel into a cylinder of an internal combustion engine includes an injector body and a needle valve. A feed passage ( | 11-27-2008 |
20100078500 | Fuel injection pump having a barrel expansion control sleeve - A fuel injection pump is provided. The fuel injection pump includes a barrel including an inner surface defining a bore. The fuel injection pump also includes a plunger movable inside the bore of the barrel. An outer surface of the plunger and the inner surface of the barrel form a clearance therebetween. One or more sleeves at least partially encircle one or more portions of an outer surface of the barrel, and are configured to apply a load to the outer surface of the barrel. | 04-01-2010 |
20100096473 | Variable flow rate valve for mechnically actuated fuel injector - A mechanically actuated electronically controlled fuel injector (MEUI) includes a first electrical actuator that controls the position of a spill valve, and a second electrical actuator to control pressure on a closing hydraulic surface associated with a directly operated needle valve. The fuel injector is actuated via rotation of a cam to move a plunger to displace fuel from a fuel pumping chamber either to a spill passage, or at high pressure out of a nozzle outlet of the fuel injector for an injection event. The minimum controllable fuel injection quantity, especially as it relates to small closely coupled post injections following a large main injection, is accomplished by the inclusion of a variable flow rate valve that restricts fluid flow from a needle control chamber toward a drain, but is relatively unrestricted to high pressure fluid flow toward the needle control chamber. The inclusion of the variable flow rate valve slows the rate at which pressure drops in the needle control chamber to commence an injection event, but permits a fast rate at which pressure may build in the needle control chamber to end an injection event. The result is a smaller post injection quantity and more controllability over the dwell time between injection events. | 04-22-2010 |
239091000 | Plunger interconnected or mounted valve (e.g., outlet valve) | 3 |
20080217429 | Injector - An injector includes a nozzle hole, a needle, an actuator, a piston that is displaced in an axial direction according to extension or contraction of the actuator, an outer sleeve holding the piston slidably on its outer circumferential side and defining a pressure chamber expanded or shrunk according to displacement of the piston. When fuel pressure in the pressure chamber is increased upon extension of the actuator, the needle opens the nozzle hole. The injector further includes an inner sleeve slidably fitted around the needle and received in the pressure chamber, an urging device for urging the inner sleeve in the axial direction and for increasing or decreasing its urging force according to displacement of the piston, an engagement surface, and a fuel chamber. A gap between the fuel chamber and the pressure chamber is closed or opened when the inner sleeve annularly engages or disengages from the surface, respectively. | 09-11-2008 |
20130048751 | METHOD AND DEVICE FOR OPERATING AN INJECTION VALVE - An injection valve includes a nozzle needle that suppresses a metered addition of fluid in a closed position and otherwise allows the metered addition of fluid. The valve includes a control chamber hydraulically coupled to the nozzle needle such that the fluid pressure of the chamber influences the nozzle needle position. The pressure of the chamber can be influenced by a control valve having a control valve body. The injection valve includes a solid state actuator that acts on the control valve body. To perform a closing operation of the nozzle needle, the control valve body is controlled to the closed position by partially discharging the solid state actuator to a predetermined partial charge such that the actuator remains force-coupled to the control valve body even after the closed position of the control valve body has been reached. The actuator is used as a pressure sensor during the closing operation. | 02-28-2013 |
20140197247 | Pump and injector for liquid chromatography - A combined pump-injector valve utilizing a single piece as the barrel of the pump and as the stator of the valve, thus eliminating any need for connections between a pump and a valve, and therefore the potential for high-pressure leaks or pressure reductions. The combined pump-injector valve permits injection of nanoliter-sized samples into a chromatographic column, which is sealed during loading of the sample and filling of the pump, such that complete analyses can be completed with microliters of mobile phase with nanoliters of a sample. | 07-17-2014 |