Patents by Inventor Reda Rizk
Reda Rizk has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8720852Abstract: The positioning of the actuating drive in a fuel injector with a piezoactuator (2) that is screwed into the housing (1) of the fuel injector is performed by applying a voltage (U) to the piezoactuator (2) that corresponds to a given idle stroke (h), and the surface grinding of the housing (3) and base plate (4) of the piezoactuator (2) when voltage is applied. Between the housing (1) of the fuel injector and the housing (3) of the piezoactuator (2), there is also provided a compensation collar (9) of a suitable thickness.Type: GrantFiled: July 16, 2007Date of Patent: May 13, 2014Assignee: Continental Automotive GmbHInventors: Wilhelm Frank, Stefan Lehmann, Martin Neumaier, Gerd Schmutzler, Wendelin Kluegl, Guenter Lewentz, Reda Rizk
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Publication number: 20080011972Abstract: The positioning of the actuating drive in a fuel injector with a piezoactor (2) that is screwed into the housing (1) of the fuel injector is performed by applying a voltage (U) to the piezoactor (2) that corresponds to a given idle stroke (h), and the surface grinding of the housing (3) and base plate (4) of the piezoactor (2) when voltage is applied. Between the housing (1) of the fuel injector and the housing (3) of the piezoactor (2), there is also provided a compensation collar (9) of a suitable thickness.Type: ApplicationFiled: July 16, 2007Publication date: January 17, 2008Inventors: Wilhelm Frank, Stefan Lehmann, Martin Neumaier, Gerd Schmutzler, Wendelin Kluegl, Guenter Lewentz, Reda Rizk
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Patent number: 7310986Abstract: The positioning of the actuating drive in a fuel injector with a piezoactor (2) that is screwed into the housing (1) of the fuel injector is performed by applying a voltage (U) to the piezoactor (2) that corresponds to a given idle stroke (h), and the surface grinding of the housing (3) and base plate (4) of the piezoactor (2) when voltage is applied. Between the housing (1) of the fuel injector and the housing (3) of the piezoactor (2), there is also provided a compensation collar (9) of a suitable thickness.Type: GrantFiled: January 16, 2004Date of Patent: December 25, 2007Assignee: Siemens AktiengesellschaftInventors: Wilhelm Frank, Stefan Lehmann, Martin Neumaier, Gerd Schmutzler, Wendelin Kluegl, Guenter Lewentz, Reda Rizk
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Publication number: 20040256499Abstract: The positioning of the actuating drive in a fuel injector with a piezoactor (2) that is screwed into the housing (1) of the fuel injector is performed by applying a voltage (U) to the piezoactor (2) that corresponds to a given idle stroke (h), and the surface grinding of the housing (3) and base plate (4) of the piezoactor (2) when voltage is applied. Between the housing (1) of the fuel injector and the housing (3) of the piezoactor (2), there is also provided a compensation collar (9) of a suitable thickness.Type: ApplicationFiled: January 16, 2004Publication date: December 23, 2004Applicant: SIEMENS AKTIENGESELLSCHAFTInventors: Wilhelm Frank, Stefan Lehmann, Martin Neumaier, Gerd Schmutzler, Wendelin Kluegl, Guenter Lewentz, Reda Rizk
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Patent number: 6705587Abstract: The positioning of the actuating drive in a fuel injector with a piezoactor (2) that is screwed into the housing (1) of the fuel injector is performed by applying a voltage (U) to the piezoactor (2) that corresponds to a given idle stroke (h), and the surface grinding of the housing (3) and base plate (4) of the piezoactor (2) when voltage is applied. Between the housing (1) of the fuel injector and the housing (3) of the piezoactor (2), there is also provided a compensation collar (9) of a suitable thickness.Type: GrantFiled: May 14, 2001Date of Patent: March 16, 2004Assignee: Siemens AktiengesellschaftInventors: Wilhelm Frank, Stefan Lehmann, Martin Neumaier, Gerd Schmutzler, Wendelin Kluegl, Guenter Lewentz, Reda Rizk
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Patent number: 6494187Abstract: The apparatus and method of regulating a control valve for a Diesel injection system comprises a fuel injector having a pressure amplifier preceded by the control valve (10), the slide (20) of the control valve (10) being moved by two spatially separated magnet coils (30, 32). During an electrical triggering of one of the two magnet coils (30, 32) with a control current, the respective other magnet coil (32, 30) is switched as a sensor, detecting the current induced in the sensor by a motion of the valve slide (20).Type: GrantFiled: August 31, 2001Date of Patent: December 17, 2002Assignee: Siemens AktiengesellschaftInventors: Raimondo Giavi, Reda Rizk
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Patent number: 6463914Abstract: The regulating member according to the present invention is arranged in a pressure line in a fuel injector with a pressure intensifier and has an actuator, a valve chamber and a spring-loaded valve piston arranged moveably in the valve chamber. The valve piston, in its position of rest, makes a flow connection through the valve chamber between a pressure supply and a control space of the pressure intensifier and, in its switching position, the valve piston makes a flow connection through the valve chamber in which the control space in the pressure intensifier is relieved of pressure.Type: GrantFiled: August 23, 2001Date of Patent: October 15, 2002Assignee: Siemens Aktiengesellschaft AGInventors: Ulrich Augustin, Raimondo Giavi, Reda Rizk
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Patent number: 6446608Abstract: The injection device for a direct-injection internal combustion engine has an actuator and a piston connected to the actuator. A compression chamber connects to a high-pressure line. The device further includes an injection nozzle, a nozzle spring chamber, a nozzle chamber, a fuel supply line, and a pressure-relief valve. The pressure-relief valve draws a constant volume of fuel from the high-pressure line when it closes.Type: GrantFiled: September 1, 2000Date of Patent: September 10, 2002Assignee: Siemens AktiengesellschaftInventor: Reda Rizk
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Publication number: 20020029765Abstract: The apparatus and method of regulating a control valve for a Diesel injection system comprises a fuel injector having a pressure amplifier preceded by the control valve (10), the slide (20) of the control valve (10) being moved by two spatially separated magnet coils (30, 32). During an electrical triggering of one of the two magnet coils (30, 32) with a control current, the respective other magnet coil (32, 30) is switched as a sensor, detecting the current induced in the sensor by a motion of the valve slide (20).Type: ApplicationFiled: August 31, 2001Publication date: March 14, 2002Applicant: SIEMENS AG.Inventors: Raimondo Giavi, Reda Rizk
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Patent number: 6345605Abstract: A configuration for amplifying fuel pressure for a fuel injector includes a pressure amplifier having a control space on a low-pressure side, a working space on a high-pressure side, and a moveable ram disposed between the control and working spaces. The control space is connected to an accumulator through a pressure line, and the working space is connected to a fuel line. The device includes an actuator connected to a servovalve for changing between an actuated switched state and an unactuated initial state. In the pressure line is the servovalve between the pressure supply and the control space, which opens the pressure line in the unactuated initial state, and interrupts the pressure line and keeps unpressurized the control space in the actuated switched state.Type: GrantFiled: February 25, 2000Date of Patent: February 12, 2002Assignee: Siemens AktiengesellschaftInventors: Ulrich Augustin, Reda Rizk, Raimondo Giavi
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Publication number: 20020000219Abstract: The regulating member according to the present invention is arranged in a pressure line in a fuel injector with a pressure intensifier and has an actuator, a valve chamber and a spring-loaded valve piston arranged moveably in the valve chamber. The valve piston, in its position of rest, makes a flow connection through the valve chamber between a pressure supply and a control space of the pressure intensifier and, in its switching position, the valve piston makes a flow connection through the valve chamber in which the control space in the pressure intensifier is relieved of pressure.Type: ApplicationFiled: August 23, 2001Publication date: January 3, 2002Applicant: SIEMENS AG.Inventors: Ulrich Augustin, Raimondo Giavi, Reda Rizk
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Patent number: 6290148Abstract: A nozzle needle (60) of a fuel injection valve is guided axially in a nozzle body (50), and it points with its rear end face (61) into a compression chamber (15) and is operatively connected to a damping body (40). The recesses (46, 47, 48) of the damping body (40), together with the damping bore (14), form a fuel-filled damping chamber (40). Upon valve opening, the fuel in the compression chamber is compressed, and thus the valve opening is delayed. If the nozzle needle exceeds the damping stroke (hd), then the fuel is depressurized by a communication with an outflow chamber (12). The damping body is guided over at least part of its length in the damping bore.Type: GrantFiled: September 13, 1999Date of Patent: September 18, 2001Assignee: Siemens AktiengesellschaftInventors: Reda Rizk, Wilhelm Frank
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Patent number: 6283154Abstract: A control valve contains a housing with an inlet connection, an outlet connection and a return connection. A first seat valve with a first valve body and a second seat valve with a second valve body are disposed in the housing. The first seat valve is disposed between the outlet connection and the return connection and is normally closed and the second seat valve is disposed between the inlet connection and the outlet connection and is normally open. The second valve body is disposed coaxially in the first valve body.Type: GrantFiled: February 28, 2000Date of Patent: September 4, 2001Assignee: Siemens Aktiengesellschaft AGInventors: Reda Rizk, Ulrich Augustin, Raimondo Giavi
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Patent number: 5135367Abstract: A fuel injector for diesel engines, having at least one pump plunger (1), which is sealingly guided in a plunger bushing (2) and, together with said bushing, defines a high-pressure space (5). The pump plunger (1) has an internal suction valve (6) which creates a fuel injection pump having a small dead volume in the high-pressure region and low construction cost. The suction valve (6) may be provided with a cone-shaped compression spring (7) disposed in the high-pressure region (5) or with a stroke limiting stop (28, 28a).Type: GrantFiled: May 3, 1990Date of Patent: August 4, 1992Assignee: Kloeckner-Humboldt-Deutz AGInventors: Gerhard Finsterwalder, Reda Rizk, Hans G. Michels
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Patent number: 5125807Abstract: A fuel injection device for diesel engines, having at least one pump plunger (4), which is sealingly guided in a plunger bushing (5) and forms, together with said plunger bushing (5), a high-pressure space (11) that is connected to a low-pressure space (13) by means of a control element during the downward motion of the fuel pump plunger, said high-pressure space (11) being placed in free flow communication with an injection valve (49) via an injection line 48. The use of a continuously open flow connection between the high-pressure space 11 and the injection valve 49 minimizes dead space thereby permitting development of high injection pressures.Type: GrantFiled: April 2, 1990Date of Patent: June 30, 1992Assignee: Kloeckner-Humboldt-Deutz AGInventors: Wolfgang Kohler, Reda Rizk, Hans-Gottfried Michels
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Patent number: 5106019Abstract: The fuel injector includes an injection pump element with electromagnetically actuated control valve body supported therein for the control of the beginning of delivery and the quantity delivered. The injection pump element and the control valve are individually replaceable and the control valve body seats without recoil. A control valve (2), which is arranged with clearance in a stepped hole (19) in a plunger bushing (5) is supported in sealing elements (20). The freedom from recoil is achieved by adaptation of a minimum clearance (46) between an anchor plate (30) and an electromagnetic adjusting device (7), the anchor plate (30) being situated in a liquid-filled damping space (33) and the minimum clearance (46) being optimized as a function of the mass of the moving parts of the control valve (2), the spring stiffness of the control valve seat (25), the geometry of an anchor plate (30) and the viscosity of the fuel in the service temperature range.Type: GrantFiled: July 29, 1991Date of Patent: April 21, 1992Assignee: Kloeckner-Humboldt-Deutz AGInventors: Reda Rizk, Hans-Gottfried Michels
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Patent number: 5067880Abstract: A fuel injector for diesel engines, having at least one pump plunger (1), which is sealingly guided in a plunger bushing (2) and, together with said bushing, defines a high-pressure space (5). The pump plunger (1) has an internal suction valve (6) which creates a fuel injection pump having a small dead volume in the high-pressure region and low construction cost. The suction valve (6) may be provided with a cone-shaped compression spring (7) disposed in the high-pressure region (5) or with a stroke limiting stop (28, 28a).Type: GrantFiled: April 22, 1991Date of Patent: November 26, 1991Assignee: Kloeckner-Humboldt-Duetz AGInventors: Gerhard Finsterwalder, Reda Rizk, Hans G. Michels
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Patent number: 4757973Abstract: A control valve for a fuel injector, especially of an air-compressing, spontaneous-ignition, internal combustion engine. The control valve includes a valve body in the form of a piston valve which is axially movable in a housing chamber into a closure position and an open position, with the closure position being determined by a valve seat on the housing, and a seating surface edge on the piston valve. The housing chamber includes at least one high pressure connection, and a low pressure connection. The basic problem with a control valve of this general type is that when the piston valve strikes the valve seat, rebound movements are carried out by the piston valve, so that the closure position can only be reliably assumed after a certain time delay, thus negatively influencing the injection process.Type: GrantFiled: November 3, 1987Date of Patent: July 19, 1988Assignee: Klockner-Humboldt-Deutz AktiengesellschaftInventors: Reda Rizk, Hans-Gottfried Michels
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Patent number: 4653723Abstract: A control valve for a fuel injector, especially of an air-compressing, spontaneous-ignition, internal combustion engine. The control valve includes a valve body in the form of a piston valve which is axially movable in a housing chamber into a closure position and an open position, with the closure position being determined by a valve seat on the housing, and a seating surface edge on the piston valve. The housing chamber includes at least one high pressure connection, and a low pressure connection. The basic problem with a control valve of this general type is that when the piston valve strikes the valve seat, rebound movements are carried out by the piston valve, so that the closure position can only be reliably assumed after a certain time delay, thus negatively influencing the injection process.Type: GrantFiled: July 23, 1985Date of Patent: March 31, 1987Assignee: Klockner-Humboldt-Deutz AktiengesellschaftInventors: Reda Rizk, Hans-Gottfried Michels
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Patent number: 4619239Abstract: A fuel injection arrangement for air-compressing, spontaneous-ignition, internal combustion engines. The arrangement includes at least one electromagnetic control valve via which a high-pressure channel of a fuel injection pump can be connected with a low-pressure channel. The control valve includes a valve body which is in the form of a piston valve, is spring-loaded, and is axially movable in a housing chamber which is provided with at least one connection on the high-pressure end, and with a connection on the low-pressure end. The piston valve is in operative connection with an electromagnetic adjusting device which can preferably be controlled by an electrically-operating data processor. The piston valve region on the high-pressure end is delimited by a valve seat and has a fixed diameter which corresponds to the diameter of the valve seat. The piston valve region on the low-pressure end has a diameter which is less than that of the piston valve region on the high-pressure end.Type: GrantFiled: January 25, 1984Date of Patent: October 28, 1986Assignee: Klockner-Humboldt-Deutz AktiengesellschaftInventors: Gerd Wallenfang, Reda Rizk, Hans-Gottfried Michels