Patents by Inventor Achim Brenk
Achim Brenk 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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Publication number: 20050224600Abstract: A fuel injection apparatus having a fuel injector fed by a high-pressure fuel source and having an injection valve with injection nozzles associated with coaxial inner and outer nozzle needles can be actuated in a pressure-dependent manner to open and close various injection cross sections at the injection nozzles. A pressure surface of the outer nozzle needle is associated with a closing chamber. To actuate the outer nozzle needle, a first on/off valve can connect the closing chamber to a low-pressure/return system. The inner nozzle needle has a control piston whose pressure surface protrudes into a second control chamber, and a second on/off valve is can connect the control chamber to the low-pressure/return system so that when the second on/off valve is actuated, the pressure is relieved in the second control chamber. This permits a separate actuation of the outer nozzle needle and inner nozzle needle.Type: ApplicationFiled: April 8, 2005Publication date: October 13, 2005Inventors: Achim Brenk, Martin Kropp, Hans-Christoph Magel
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Publication number: 20050194468Abstract: A fuel injection system for internal combustion engines with a fuel injector that can be supplied from a high-pressure fuel source has an injection valve, with injection nozzles pointing toward the combustion chamber, and coaxial inner and outer nozzle needles assigned to the injection nozzles are triggerable as a function of pressure to open and close various injection cross sections at the injection nozzles. Each of the nozzle needless is assigned a respective damping piston, and the damping pistons are movable relative to one another and act on a damping chamber which can be made to communicate with a low-pressure return system via an outlet throttle. In addition to the damping chamber, a closing chamber is provided, to which an end face of the outer nozzle needle is exposed in the closing direction.Type: ApplicationFiled: March 2, 2005Publication date: September 8, 2005Inventors: Achim Brenk, Martin Kropp
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Patent number: 6874476Abstract: The invention relates to a 3/2-way valve for controlling the injection of fuel in a common rail injection system of an internal combustion engine, having a first switching position, in which an injection nozzle is in communication with a fuel return, and a second switching position, in which the injection nozzle is in communication with a common rail. To improve the function and quality of the injection, the 3/2-way valve includes two force-balanced control pistons, which are guided separately from one another, and on each of which a respective valve seat edge is embodied.Type: GrantFiled: March 15, 2002Date of Patent: April 5, 2005Assignee: Robert Bosch GmbHInventors: Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack
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Patent number: 6837451Abstract: The invention relates to a 3/2-way valve for controlling the injection of fuel in a common rail injection system of an internal combustion engine, having a first switching position, in which an injection nozzle is in communication with a fuel return, and having a second switching position, in which the injection nozzle is in communication with a high-pressure fuel reservoir. To improve the function and quality of the injection, the 3/2-way valve includes a force-balanced control piston, and the control edge of the control piston is pressure-equalized by means of a blind bore.Type: GrantFiled: March 12, 2002Date of Patent: January 4, 2005Assignee: Robert Bosch GmbHInventors: Nestor Rodriguez-Amaya, Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack, Hubert Greif
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Patent number: 6769634Abstract: In a fuel injection nozzle having a nozzle body which body has one first and one second group of injection ports, one first and one second nozzle needle, and one separate pressure chamber for each nozzle needle, so that the injection needles are adjustable independently of one another between a closed position, in which the injection ports associated with the corresponding nozzle needle are closed, and an injection position, in which the corresponding injection ports are opened, a free choice of injection cross sections is to be made possible, while the design is simple. To that end, it is provided that the two nozzle needles adjoin one another.Type: GrantFiled: February 19, 2002Date of Patent: August 3, 2004Assignee: Robert Bosch GmbHInventors: Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack
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Patent number: 6764058Abstract: A control valve and a fuel injection valve provided with same should be produced, in which it is possible to switch from a first operating state to a second operating state inexpensively and with short switching times, without requiring a hydraulic control line. To this end, a control valve is provided, which has a valve housing, a pressure chamber filled with electrorheological fluid, a displacing element that can slide in the valve housing and protrudes into the pressure chamber, and two electrodes that can apply an electrical field to the electrorheological fluid.Type: GrantFiled: October 22, 2001Date of Patent: July 20, 2004Assignee: Robert Bosch GmbHInventors: Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack
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Publication number: 20040134466Abstract: The invention relates to a 3/2-way valve for controlling the injection of fuel in a common rail injection system of an internal combustion engine, having a first switching position, in which an injection nozzle is in communication with a fuel return, and a second switching position, in which the injection nozzle is in communication with a common rail.Type: ApplicationFiled: July 2, 2003Publication date: July 15, 2004Inventors: Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack
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Patent number: 6745750Abstract: A fuel injection system, having a fuel injection valve and a control valve, which control valve has a control valve member that is longitudinally displaceable in a control valve bore. A control valve sealing face is embodied on the control valve member; it cooperates with a control valve seat and thus controls the communication between a first pressure space and a second pressure space; the first pressure space communicates with a high-pressure collection chamber. In a valve body, a bore is embodied in which a pistonlike valve needle, with its end toward the combustion chamber, controls the opening of at least one injection opening by executing a longitudinal motion in response to the pressure in a pressure chamber; the pressure chamber communicates with the second pressure space via an inlet conduit.Type: GrantFiled: November 25, 2002Date of Patent: June 8, 2004Assignee: Robert Bosch GmbHInventors: Walter Egler, Giovanni Ferraro, Hansjoerg Egeler, Achim Brenk, Wolfgang Klenk, Peter Boehland, Werner Teschner, Sebastian Kanne, Ingolf Kahleyss, Uwe Gordon, Manfred Mack
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Publication number: 20040089268Abstract: In a pressure-controlled fuel injection apparatus (1) with a common rail, an injector (5), and a metering valve (6) for controlling the injector (5), the metering valve (6) is integrated into the common rail. This reduces the production cost for the fuel injection apparatus (1).Type: ApplicationFiled: July 23, 2003Publication date: May 13, 2004Inventors: Achim Brenk, Wolfgang Klenk, Roland Bleher, Uwe Gordon, Manfred Mack
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Publication number: 20040069274Abstract: The invention relates to a 3/2-port directional-control valve for controlling the injection of fuel in a common rail injection system of an internal combustion engine, with a first switched position in which an injection nozzle is connected to a fuel return and with a second switched position in which the injection nozzle is connected to a high-pressure fuel reservoir. The beginning of the injection takes place in a pressure-controlled manner, whereas the end of the injection takes place in a stroke-controlled manner.Type: ApplicationFiled: February 10, 2003Publication date: April 15, 2004Inventors: Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack
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Patent number: 6691935Abstract: In an injection nozzle for a fuel injection system, the opening stroke of the nozzle needle is to be limited selectively, so that different injection cross sections can be employed. To that end, the injection nozzle is provided with a nozzle body, a nozzle needle displaceable in the nozzle body, two groups of injection ports, which are uncovered as a function of an opening stroke of the nozzle needle, a piston that is connected to the nozzle needle, a stop chamber in which the piston is disposed and which is provided with an outlet, and a control valve that can open and close the outlet of the stop chamber, as a result of which the stroke of the piston in the stop chamber and thus the opening stroke of the nozzle needle can be selectively limited.Type: GrantFiled: March 4, 2002Date of Patent: February 17, 2004Assignee: Robert Bosch GmbHInventors: Detlev Potz, Gerhard Mack, Achim Brenk, Wolfgang Klenk, Thomas Kuegler, Roland Bleher, Uwe Gordon, Manfred Mack
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Patent number: 6637409Abstract: In a fuel injection system for internal combustion engines, including an electronically triggered control valve with an axial through bore, which is divided by two valve seats into three annular chambers, to which respectively a supply line for fuel at high pressure, a high-pressure line leading away to an injection valve, and a relief line are connected, and having a control piston, which is guided in the through bore and which has two valve sealing faces cooperating with the two valve seats, respectively, the control piston according to the invention has a further valve sealing face, which cooperates with the first valve seat and whose spacing from the first valve sealing face is at least equal to the spacing between the second valve sealing face and the second valve seat when the first sealing seat is closed. A communication between the supply line and the relief line is thus reliably prevented.Type: GrantFiled: June 13, 2002Date of Patent: October 28, 2003Assignee: Robert Bosch GmbHInventors: Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack
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Publication number: 20030172978Abstract: The invention relates to a 3/2-way valve for controlling the injection of fuel in a common rail injection system of an internal combustion engine, having a first switching position, in which an injection nozzle is in communication with a fuel return, and having a second switching position, in which the injection nozzle is in communication with a high-pressure fuel reservoir.Type: ApplicationFiled: May 9, 2003Publication date: September 18, 2003Inventors: Nestor Rodriguez-Amaya, Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack, Hubert Greif
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Publication number: 20030127074Abstract: A fuel injection system, having a fuel injection valve (15) and a control valve (50), which control valve (50) has a control valve member (54) that is longitudinally displaceable in a control valve bore (52). A control valve sealing face (55) is embodied on the control valve member (54); it cooperates with a control valve seat (56) and thus controls the communication between a first pressure space (57) and a second pressure space (58); the first pressure space (57) communicates with a high-pressure collection chamber (10). In a valve body (25), a bore (30) is embodied in which a pistonlike valve needle (32), with its end toward the combustion chamber, controls the opening of at least one injection opening (38) by executing a longitudinal motion in response to the pressure in a pressure chamber (31); the pressure chamber (31) communicates with the second pressure space (58) via an inlet conduit (28).Type: ApplicationFiled: November 25, 2002Publication date: July 10, 2003Inventors: Walter Egler, Giovanni Ferraro, Hansjoerg Egeler, Achim Brenk, Wolfgang Klenk, Peter Boehland, Werner Teschner, Sebastian Kanne, Ingolf Kahleyss, Uwe Gordon, Manfred Mack
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Publication number: 20030098371Abstract: In a fuel injection nozzle having a nozzle body (12), which body has one first and one second group of injection ports (14, 16), one first and one second nozzle needle (18, 20), and one separate pressure chamber (24, 34) for each nozzle needle, so that these are adjustable independently of one another between a closed position, in which the injection ports associated with the corresponding nozzle needle are closed, and an injection position, in which the corresponding injection ports are opened, a free choice of injection cross sections is to be made possible, while the design is simple. To that end, it is provided that the two nozzle needles adjoin one another.Type: ApplicationFiled: February 19, 2002Publication date: May 29, 2003Inventors: Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack
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Publication number: 20030019959Abstract: In a fuel injection system for internal combustion engines, having two control valves (15, 34), provided for controlling the injection event, whose valve bodies each have one magnetically attractable armature (41, 45), and having a common magnet coil (40) for the two armatures (41, 45), in a first current stage of the common magnet coil (40), only one armature (41), and in a higher second current stage both armatures (41, 45), are each attractable counter to the action of a closing force. Thus with only a single magnet drive mechanism, two valve functions can be switched via two exciter currents of different magnitudes.Type: ApplicationFiled: August 1, 2002Publication date: January 30, 2003Inventors: Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack, Marcus Parche
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Publication number: 20020170535Abstract: In a fuel injection system (1) for internal combustion engines, including an electronically triggered control valve (9) with an axial through bore (10), which is divided by two valve seats (19, 20) into three annular chambers (11, 12, 13), to which respectively a supply line (7) for fuel at high pressure, a high-pressure line (15) leading away to an injection valve (8), and a relief line (17) are connected, and having a control piston (14), which is guided in the through bore (10) and which has two valve sealing faces (24, 27) cooperating with the two valve seats (19, 20), respectively, the control piston (14) according to the invention has a further valve sealing face (25), which cooperates with the first valve seat (19) and whose spacing (h1) from the first valve sealing face (24) is at least equal to the spacing (h2) between the second valve sealing face (27) and the second valve seat (20) when the first sealing seat is closed.Type: ApplicationFiled: June 13, 2002Publication date: November 21, 2002Inventors: Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack