Patents by Inventor Peter Schelhas
Peter Schelhas 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: 8182677Abstract: Known tank flanges have a main filter which has a filter housing with an inlet and an outlet, and a first connecting duct for connecting the main filter to a feed unit. The filter housing is integrated in the tank flange, and filter fabric is inserted into the filter housing and the filter housing is closed off by a filter cover. The inlet of the filter housing is connected to the pressure side of a feed unit and the outlet leads to an internal combustion engine. A disadvantage is that, in order to exchange the filter fabric, the large-area filter cover must be opened, as a result of which a large amount of fuel vapor is dissipated to the atmosphere. In the case of the tank flange according to the invention, the exchangeability of the main filter is simplified by virtue of the main filter being embodied as a filter cartridge. It is provided according to the invention that the inlet of the main filter extends into the first connecting duct of the tank flange and therein forms a sealed connection.Type: GrantFiled: September 25, 2007Date of Patent: May 22, 2012Assignees: Robert Bosch GmbH, Kautex Textron GmbH & Co. KGInventors: Bernd Osswald, Alfred Mueller, Klaus Gebert, Peter Schelhas
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Patent number: 8066030Abstract: Disclosed is a fuel conveying device including a valve housing in which a pressure release valve and a non-return valve are arranged parallel to one another, the pressure release valve having a first inlet, which downstream of a valve seat opens into a valve chamber in which a valve body is movably arranged and which is in fluid connection with a second inlet for the non-return valve via a first outlet. The device improves the control response of the pressure release valve by providing the first outlet at the periphery of the valve chamber and in the axial direction with respect to a valve axis such that when the pressure release valve is open the flow from the valve chamber into the second inlet is a substantially radial flow.Type: GrantFiled: August 16, 2006Date of Patent: November 29, 2011Assignee: Robert Bosch GmbHInventors: Peter Schelhas, Andreas Herforth, Zdenek Liner, Michael Dufek, David Krenovsky
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Patent number: 7954361Abstract: Method and apparatus for detecting tank leaks, in which a gas pressure acts on a fluid which is situated in a tank, and in which the gas pressure in the tank or tank system is changed, wherein a tank leak is detected by evaluation of a temporal profile of a sum pressure of the fluid which is situated in the tank.Type: GrantFiled: November 13, 2006Date of Patent: June 7, 2011Assignee: Robert Bosch GmbHInventors: Peter Schelhas, Manfred Franz, Andreas Posselt, Andreas Baumann, Martin Streib, Michael Pfeil, Marko Lorenz, Silke Haag
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Patent number: 7832379Abstract: A devices for pumping fuel has at least one suction jet pump and a drive line, supplying the suction jet pump with fuel, that branches off from a pressure line leading to an internal combustion engine and that can be blocked off by means of a shutoff valve. By means of a shutoff valve, it is possible to switch off the suction jet pumps. The pressure of the pressure line acts on the shutoff valve in such a way that the shutoff valve closes at a pressure that is greater than or equal to a predetermined closing pressure.Type: GrantFiled: October 4, 2005Date of Patent: November 16, 2010Assignee: Robert Bosch GmbHInventors: Peter Schelhas, Michael Kuehn, Hans-Peter Braun, Thomas Wieland, Werner Schneider, Winfried Eckart, Christian Pankiewitz
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Publication number: 20100065572Abstract: Known tank flanges have a main filter which has a filter housing with an inlet and an outlet, and a first connecting duct for connecting the main filter to a feed unit. The filter housing is integrated in the tank flange, and filter fabric is inserted into the filter housing and the filter housing is closed off by a filter cover. The inlet of the filter housing is connected to the pressure side of a feed unit and the outlet leads to an internal combustion engine. A disadvantage is that, in order to exchange the filter fabric, the large-area filter cover must be opened, as a result of which a large amount of fuel vapor is dissipated to the atmosphere. In the case of the tank flange according to the invention, the exchangeability of the main filter is simplified by virtue of the main filter being embodied as a filter cartridge. It is provided according to the invention that the inlet of the main filter extends into the first connecting duct of the tank flange and therein forms a sealed connection.Type: ApplicationFiled: September 25, 2007Publication date: March 18, 2010Inventors: Bernd Osswald, Alfred Mueller, Klaus Gebert, Peter Schelhas
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Publication number: 20080251052Abstract: Disclosed is a fuel conveying device including a valve housing in which a pressure release valve and a non-return valve are arranged parallel to one another, the pressure release valve having a first inlet, which downstream of a valve seat opens into a valve chamber in which a valve body is movably arranged and which is in fluid connection with a second inlet for the non-return valve via a first outlet. The device improves the control response of the pressure release valve by providing the first outlet at the periphery of the valve chamber and in the axial direction with respect to a valve axis such that when the pressure release valve is open the flow from the valve chamber into the second inlet is a substantially radial flow.Type: ApplicationFiled: August 16, 2006Publication date: October 16, 2008Inventors: Peter Schelhas, Andreas Herforth, Zdenek Liner, Michael Dufek, David Krenovsky
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Publication number: 20080196482Abstract: Method and apparatus for detecting tank leaks, in which a gas pressure acts on a fluid which is situated in a tank, and in which the gas pressure in the tank or tank system is changed, wherein a tank leak is detected by evaluation of a temporal profile of a sum pressure of the fluid which is situated in the tank.Type: ApplicationFiled: November 13, 2006Publication date: August 21, 2008Applicant: Robert Bosch GmbHInventors: Peter Schelhas, Manfred Franz, Andreas Posselt, Andreas Baumann, Martin Streib, Michael Pfeil, Marko Lorenz, Silke Haag
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Publication number: 20080095642Abstract: A devices for pumping fuel has at least one suction jet pump and a drive line, supplying the suction jet pump with fuel, that branches off from a pressure line leading to an internal combustion engine and that can be blocked off by means of a shutoff valve. By means of a shutoff valve, it is possible to switch off the suction jet pumps. The pressure of the pressure line acts on the shutoff valve in such a way that the shutoff valve closes at a pressure that is greater than or equal to a predetermined closing pressure.Type: ApplicationFiled: October 4, 2005Publication date: April 24, 2008Inventors: Peter Schelhas, Michael Kuehn, Hans Braun, Thomas Wieland, Werner Schneider, Winfried Eckart, Christian Pankiewitz
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Patent number: 7278402Abstract: A diaphragm valve having a first chamber and a second chamber, which is separated from the first chamber by means of a valve member which cooperates with a valve seat. A first connecting conduit situated in the vicinity of the valve seat feeds into the first chamber. To enable the diaphragm valve to be used as a pressure control valve, the valve member has a through conduit that connects the first connecting conduit to the second chamber of the pressure control valve when the pressure control valve is closed.Type: GrantFiled: August 5, 2004Date of Patent: October 9, 2007Assignee: Robert Bosch GmbHInventor: Peter Schelhas
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Patent number: 7275524Abstract: A return-flow-free fuel supply system for an internal combustion engine having at least one fuel pump for pumping fuel from a first region of a fuel reservoir into a pressure region communicating with a fuel distributor, at least one suction jet pump, through which fuel pumped through a suction jet pump line by means of the fuel pump flows and through which fuel can be pumped from a second region of the fuel reservoir into the first region, at least one means that regulate and/or control the pressure in the pressure region, and at least one check valve, by which at least a portion of the pressure region can be blocked off from the fuel pump. The means that regulate and/or control the pressure in the pressure region include at least one electrically actuatable magnet valve(40,44), which is disposed downstream of the check valve in the suction jet pump line.Type: GrantFiled: July 11, 2003Date of Patent: October 2, 2007Assignee: Robert Bosch GmbHInventors: Peter Schelhas, Andreas Herforth
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Publication number: 20060225711Abstract: A diaphragm valve having a first chamber and a second chamber, which is separated from the first chamber by means of a valve member which cooperates with a valve seat. A first connecting conduit situated in the vicinity of the valve seat feeds into the first chamber. To enable the diaphragm valve to be used as a pressure control valve, the valve member has a through conduit that connects the first connecting conduit to the second chamber of the pressure control valve when the pressure control valve is closed.Type: ApplicationFiled: August 5, 2004Publication date: October 12, 2006Inventor: Peter Schelhas
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Publication number: 20050175488Abstract: A return-flow-free fuel supply system for an internal combustion engine having at least one fuel pump for pumping fuel from a first region of a fuel reservoir into a pressure region communicating with a fuel distributor, at least one suction jet pump, through which fuel pumped through a suction jet pump line by means of the fuel pump flows and through which fuel can be pumped from a second region of the fuel reservoir into the first region, at least one means that regulate and/or control the pressure in the pressure region, and at least one check valve, by which at least a portion of the pressure region can be blocked off from the fuel pump. The means that regulate and/or control the pressure in the pressure region include at least one electrically actuatable magnet valve, which is disposed downstream of the check valve in the suction jet pump line.Type: ApplicationFiled: July 11, 2003Publication date: August 11, 2005Inventors: Peter Schelhas, Andreas Herforth
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Publication number: 20050155582Abstract: A fuel supply system (2) for an internal combustion engine (1) for, in particular, a motor vehicle. The fuel supply system (2) is used for delivering fuel from a fuel tank (3) into at least one intake manifold (4) or at least one combustion chamber (5) of the internal combustion engine (1) and includes at least two fuel pumps (6, 8; 11) connected in series. In order to ensure that the internal combustion engine (1) is supplied with fuel at any operating point of the internal combustion engine (1), it is provided that at least two of the fuel pumps (6, 8; 11) of the fuel supply system (2) take the form of electric fuel pumps (6, 8). The second electric fuel pump (8) in the direction of flow is preferably adjusted to a separate, variable pressure level in a demand-responsive manner, so that the pressure and fuel quantity are controlled.Type: ApplicationFiled: December 8, 2004Publication date: July 21, 2005Inventors: Peter Schelhas, Thomas Frenz, Andreas Posselt, Andreas Herforth
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Publication number: 20040037713Abstract: The fuel feed system has a feed unit (22), which has having an electric motor (32) as a drive mechanism and a pumping part (34) driven by the electric motor; the pumping part (34) is disposed offset from the electric motor (32), in the direction of the pivot axis (33) of the electric motor. A filter (24) is disposed beside the feed unit (22) and fuel pumped by the pumping part (34) flows through it. The feed unit (22) and the filter (24) are disposed in separate chambers (10, 20) of a common housing (16), between which chambers there is an overflow opening (60) for the fuel pumped by the pumping part (34). The housing (16) is tightly closed by means of a cap (26). The electric motor (32) and the pumping part (34) are inserted as separate structural units into a chamber (10) of the housing (16) and are braced against one another by at least one resilient element (58) in the direction of the pivot axis (33) of the electric motor (32).Type: ApplicationFiled: September 2, 2003Publication date: February 26, 2004Inventors: Peter Schelhas, Asta Reichl, Stephan Kleppner, Michael Kuehn, Mathias Rollwagen, Hans-Peter Braun, Hans-Joerg Fees, Dieter Schreckenberger, Thomas Wieland, Jochen Rose
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Patent number: 6672288Abstract: In a feed unit for delivering fuel from a supply tank (10) with a filter cup (13) having a central chamber (14) and an annular chamber (15) enclosing the latter, with a filter cover (30) which closes the annular chamber (15) and which contains an inlet duct (36) to the annular chamber (15) and an outlet duct (37) from the annular chamber (15), and with a feed pump (22) which is inserted in the central chamber (14) and which projects with a suction connection piece (26) through an opening (20) into a suction space (19), assembly is simplified and manufacturing costs are reduced in that the clearance diameter of the central chamber (14) is dimensioned so as to be greater than the outer diameter of the pump housing (23), and an axially projecting pressure connection piece (27) is formed at the other end side of the housing (23) remote of the suction connection piece (26) and a mounting cap (38) which engages over the pressure connection piece (27) is formed at the filter cover (30).Type: GrantFiled: January 19, 2000Date of Patent: January 6, 2004Assignee: Robert Bosch GmbHInventors: Peter Schelhas, Dietmar Schmieder, Willi Strohl, Albert Gerhard
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Patent number: 6666084Abstract: A method for determining the instantaneous fluid level of a tank includes the steps of: designating a beginning fluid-level of the tank as an input value during the starting of the engine; ascertaining a first fluid-level value from a fluid level measured by a fluid-level measuring device, and ascertaining a second fluid-level value and a window around the second fluid-level value from the consumption of the engine and from the input value; comparing the first fluid-level value to the window around the second fluid-level value; determining whether the first or the second fluid-level value should be a new input value; displaying the new input value as the fluid level; and terminating the method if the engine is switched off or repeating the method starting from the ascertaining step when the engine is running.Type: GrantFiled: March 13, 2002Date of Patent: December 23, 2003Assignee: Robert Bosch GmbHInventors: Peter Schelhas, Klaus Marx, Hans Braun, Stefan Muelders
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Publication number: 20020194910Abstract: A method for determining the instantaneous fluid level of a tank includes the steps of: designating a beginning fluid-level of the tank as an input value during the starting of the engine; ascertaining a first fluid-level value from a fluid level measured by a fluid-level measuring device, and ascertaining a second fluid-level value and a window around the second fluid-level value from the consumption of the engine and from the input value; comparing the first fluid-level value to the window around the second fluid-level value; determining whether the first or the second fluid-level value should be a new input value; displaying the new input value as the fluid level; and terminating the method if the engine is switched off or repeating the method starting from the ascertaining step when the engine is running.Type: ApplicationFiled: March 13, 2002Publication date: December 26, 2002Inventors: Peter Schelhas, Klaus Marx, Hans Braun, Stefan Muelders
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Patent number: 6457459Abstract: The fuel supply apparatus has a reservoir (14) arranged within a fuel tank (12) from which fuel is drawn by a fuel feed unit (16) and supplied to an internal combustion engine (10). Unburned fuel from the internal combustion engine (10) is fed back into the fuel tank (12) via a return line (30). A control valve (34) is arranged in the return line (30), by which a connection of the return line (30) with a jet pump (38) is controlled, which supplies fuel from the fuel tank (12) to the reservoir (14). The control valve (34) has a floating body floating on the fuel in the reservoir (14) when it is nearly filled or completely filled, by which a control element of the control valve (34) is movable. When the reservoir (14) is not in its maximum filled state (hmax) the jet pump (38) is connected with the return line (30), but when the reservoir (14) is in its maximum filled state (hmax) the jet pump (38) is disconnected from the return line (30), which then opens into the reservoir (14).Type: GrantFiled: October 18, 2000Date of Patent: October 1, 2002Assignee: Robert Bosch GmbHInventors: Peter Schelhas, Hans-Peter Braun, Stefan Woerz
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Patent number: 6095771Abstract: The invention relates to a unit for conveying fuel from a supply tank to the internal combustion engine of a motor vehicle, having an electric drive motor and a flow pump (11), driven by it, which has a pump housing (16, 21) permanently connected to the unit housing (32) and forming a pump chamber (17), in which housing conveying means (12) moved by the drive motor revolve, wherein an insert (51) of wear-resistant material is disposed on the at least one housing part (16, 21) that defines the pump chamber (17), the insert forming at least part of a chamber wall (18, 19) which defines the pump chamber (17) in the direction of the axis of rotation (15) of the conveying means (12).Type: GrantFiled: August 29, 1997Date of Patent: August 1, 2000Assignee: Robert Bosch GmbHInventors: Peter Schelhas, Lothar Krauter, Dietmar Schmieder, Harald Lang
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Patent number: 6047685Abstract: A feeding device for fuel having an electric motor, a feed pump which is driven by the electric motor, a filter arranged in a fuel stream of the feed pump, a housing accommodating the electric motor, the feed pump and the filter, a fuel tank for a fuel supply and provided with a tank flange which forms a cover, tubular connections for guiding a fuel stream in a feeding direction and to the tank flange, the tubular connections being composed of an electrically conductive plastic and producing a throughgoing electrical ground connection of all components through which a fuel flows.Type: GrantFiled: September 16, 1999Date of Patent: April 11, 2000Assignee: Robert Bosch GmbHInventors: Peter Schelhas, Kurt Frank, Michael Kuehn, Willi Strohl, Albert Gerhard