Abstract: A fuel injection system is provided which includes a source of high pressure fuel, a low pressure fuel reservoir, and at least one fuel injector which has an injector body that defines a nozzle chamber, a needle control chamber, a needle control vent, a fuel inlet, and a nozzle outlet. A high pressure line extends between the source of high pressure fuel and the fuel inlet. A low pressure line extends between the low pressure fuel reservoir and the needle control vent. A needle control valve is positioned in the injector body and includes a poppet valve member with a first position in which the needle control chamber is fluidly connected to the fuel inlet but closed to the needle control vent. The poppet valve also has a second position in which the needle control chamber is closed to the fuel inlet but open to the needle control vent.

Abstract: End of injection rate shaping can be attained by controlling the flow rate into a check control cavity. Specifically, a flow control valve allows the check control cavity to vent at a first flow rate and to pressurize at a second slower flow rate. By pressurizing at a slower rate, end of injection does not occur as quickly, allowing injection pressure to decrease before injection is terminated.

Abstract: For each cylinder of the internal combustion engine, the fuel injection apparatus has a high-pressure fuel pump and a fuel injection valve connected to it. A pump piston of the high-pressure fuel pump defines a pump working chamber connected to a pressure chamber of the fuel injection valve, which has an injection valve member which controls the injection openings and which the pressure prevailing in the pressure chamber can move in an opening direction counter to a closing force. A first control valve controls a connection between the pump working chamber and a relief chamber, and a second control valve controls a connection between the relief chamber and a control pressure chamber, which is connected to the pump working chamber.

Abstract: An engine has a fuel supply system comprising a fuel pump provided with valves for opening and closing a fuel suction hole and a fuel exhaust hole alternately, synchronously with a movement of an air supply push rod, a pipe connecting the fuel suction hole of the fuel pump and a fuel supply source to each other; and a pipe connecting the fuel exhaust hole of the fuel pump and a fuel injection device provided on an air supply port of the cylinder to each other, wherein a fuel is fed to the fuel injection device from the fuel pump owing to an upward movement and a downward movement of the air supply push rod caused by a rotation of the crankshaft; and the air supply valve is opened to inject the fuel.

Abstract: In an injection system with pressure intensification with a simple and space-saving design, control means are provided permitting a large range fuel injection pressure control, which also permits rapid adaptation of the fuel injection pressure to the various engine operating conditions.

Abstract: A device for the assembly of printed circuit boards with contacts having one or more terminal posts for insertion into corresponding holes in the printed circuit board in different orientations, the device comprising a guide block which executes a raising and lowering movement perpendicular to the printed circuit board; a transport device operated by the guide block for supplying the contacts secured to a carrier strip, with a cutting device operated by the guide block for the removal of the carrier strip; a setting finger operated by the guide block for holding and inserting one of the contacts with terminal posts into the printed circuit board, characterised in that the setting finger is coupled to the guide block and executes with the guide block a corresponding movement perpendicular to the printed circuit board, and the setting finger is connected to a curved groove cylinder the axis of which coincides with the perpendicular movement direction and which has at least one curved groove on its cylinder jack

Abstract: A fuel injection apparatus for internal combustion engines conveys fuel from a high-pressure fuel reservoir to an injection opening by means of a control valve, which can be actuated by a piezoelectric unit. The control valve has a valve member, which can be moved axially between a first valve seat and a second valve seat, which define a first valve chamber. A line leading from the high-pressure fuel source feeds into a second valve chamber, which is defined by the first valve seat and a first guide of the valve member in the valve body. A line, which leads to the injection opening, branches from the first valve chamber. A second guide of the valve member is provided in a region of the valve member adjacent to the second valve seat. On the respective side of each guide, a respective leakage line is provided. The diameters of the valve seats and the guides are respectively selected to be the same so that a force compensation is achieved in the control valve.

Abstract: A fuel injection system and method includes a cylinder head having an injector port. A fuel injector has a first end and a second end, the second end being received in the injector port. A fuel rail includes a socket for receiving the first end of the fuel injector. A spring assembly is coupled between the fuel rail and the injector to bias the injector toward the cylinder head. The spring assembly includes a housing, a spring in the housing, and a viscous material at least partially surrounding the spring in the housing. The spring assembly utilizes a squeeze film effect to resist movement of the injector in a direction toward the fuel rail. Preferably, the spring is comprised of a plurality of alternatingly-oriented disc springs, and the viscous material is a grease.

Abstract: The present invention generally includes a composite fuel rail with integral damping provided by flat sections, molded into the rail conduit, that flex in response to a pressure pulsation and a co-injected composite laminate structure wherein the compounds of the laminates can be selectively varied to provide impact resistance, chemical resistance and a vapor permeation barrier, as needed.

Abstract: A high pressure fuel supply apparatus is constituted by a plunger reciprocating in a sleeve of a high pressure fuel pump so as to form a fuel pressurizing chamber between the plunger and the sleeve, a suction valve provided in a fuel suction port for sucking fuel into the fuel pressurizing chamber, and a discharge valve provided in a fuel discharge port for discharging fuel from the fuel pressurizing chamber into a high pressure fuel discharge passageway communicating with an internal combustion engine, the discharge valve reciprocating axially so as to perform an open/close operation, wherein the high pressure fuel supply apparatus further comprises a holder for regulating an axial reciprocating movement of the discharge valve in the open/close operation within a predetermined range.

Abstract: In a fuel supply device, an injector having a fuel inlet whose outer wall of the fuel inlet is inserted into and frictionally engaged via an o-ring with an inner wall of a fuel delivery port. The injector is integrally provided with a connector protruding radially outward. A clip has holes engaged with an outer wall of the fuel delivery port, a pair of opposed arms between which a part of the fuel injector is sandwiched so as to allow the fuel injector to move axially, and two pawls each provided in each end of the arms so as to constitute a stopper which comes in contact with a protruding portion constituting the connector, when the injector is moved in a direction of drawing out of the fuel delivery port, so that the injector never slip out of the fuel delivery port.

Abstract: A fuel injector, particularly an injector of an internal combustion engine, has a piezoelectric or magnetostrictive actuator which is arranged in an actuator chamber which is sealed against the fuel, the fuel injector having a valve-closure member which can be actuated by the actuator via a valve needle, and which cooperates with a valve-seat face to form a sealing seat. In this context, the seal for forming the permeation-resistant sealing contains at least two elastomer sealing devices arranged in tandem.

Abstract: A nozzle supply valve is positioned in the nozzle supply passage of a fuel injector, and is constructed to generate a boot shaped rate trace mechanically. The goal of the concept is to restrict the flow area during the first boot step and release the flow area restriction in the second step. During the first stage of injection, the flow to the nozzle only goes through a restricted orifice. When the line pressure is high enough to overcome the valve movement pressure spring preload, the nozzle supply valve moves to an unrestricted position, and the boot shaped rate trace is formed. Since this boot shape rate trace is generated mechanically, it can be combined with fuel injectors having a direct control needle valve in order to get different rate traces including, ramps, squares, pilots, posts and other split injections.

Abstract: A high flow rate fuel vapor vent and rollover valve assembly with a float valve that provides a progressive closing of a vapor outlet to control the venting of fuel vapors from a fuel tank and the addition of liquid fuel to the tank. The float closes a portion of the vapor outlet in response to liquid fuel at a first level in a vehicle fuel tank. A body completely closes the vapor outlet in response to rollover attitudes of the vehicle. One or more separate baffles are constructed and arranged to prevent the escape of liquid fuel through the vapor outlet.

Abstract: An intake valve automatically opened and closed by pressure of a pressuring chamber is provided in a fuel intake passage, the intake valve is pushed to open by a plunger of an electromagnetic plunger mechanism, pulling-in operating timing of the plunger is controlled according to the operating condition of an internal combustion engine, and opening time of the intake valve during compression stroke of a pump is controlled to make discharge flow-rate of high pressure fuel variable.

Abstract: A method of and apparatus for assembling a disk drive. The method comprises steps of clamping a number of head suspension assemblies in an actuator body such that base plate hubs in the suspensions are in alignment with corresponding boss holes in actuator arms extending from the actuator body, inserting closed jaws between the actuator arms and in alignment with the base plates, and opening the jaws a reach sufficient to urge each base plate hub into a corresponding boss hole. The jaws are opened by any suitable mechanism, for example by driving a wedge in between the closed jaws. A novel apparatus is employed for joining base plate hubs to actuator arms extending from an actuator body. The apparatus includes an actuator body clamp adapted to hold a number of suspensions in the actuator body, with hubs of the suspensions in alignment with boss holes in the actuator arms.

Abstract: A fuel delivery system of an automobile that eliminates the vapor canister and includes leak detection of the fuel tank while also permitting failsafe operation when there is a leak in the fuel tank. The fuel tank includes a flexible member defining a first chamber that stores fuel in a chamber devoid of air while a second chamber is at ambient pressure. The fuel system can be formed as a module for installation or retrofitting to various applications using an internal combustion engine, including automobiles. A method of operating the fuel system to purge fuel vapor is also disclosed. A method of preventing fuel leaks is additionally disclosed.

Abstract: A composite fuel rail for delivering fuel to the fuel injectors of an internal combustion engine, includes an elongate body having a plurality of axially spaced transversely extending fuel injector sockets. The elongate body also includes an elongate, axially extending fuel passage intersecting the sockets to supply fuel to the sockets. The elongate body has an elongate polymer inner liner made of a chemically inert material that does not degrade substantially when exposed to fuel. The elongate body further includes a fiber reinforced outer shell extending over and covering the inner liner.

Abstract: A motorcycle having an improved fuel tank arrangement with an opening in an upper side wall of the fuel tank that is closed by a combined fuel pump, closure plate and return port arrangement. The fuel is supplied to a fuel injection system through an arrangement including a filter and pressure regulator with the filter pressure regulator and opening all being positioned on the same side of the motorcycle and at relatively the same vertical height. The assembly may be removed from the opening without draining fuel due to its high placement in the opening.

Abstract: A fuel pump comprising a plunger member reciprocable within a plunger bore, wherein the plunger member is cooperable with a drive arrangement to cause inward movement of the plunger member within the plunger bore to increase fuel pressure therein. The pump comprises an accumulator for fuel, and a valve arrangement controlling communication between the plunger bore and the accumulator to permit fuel under pressure to flow into the accumulator. The pumping plunger is moved in an outward direction under the action of the fuel pressure within the accumulator. The invention also relates to a fuel injection system comprising the fuel pump.