Patents by Inventor Volker Schwarz
Volker Schwarz 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: 20040136837Abstract: A high-pressure pump having a plurality of individual feed pumps is described, the feed pumps being designed as modular pump units and being able to be lined up next to one another via their housings, which are provided with fluid-connecting channels. At least one line module being provided which can be coupled at least on one side to a housing of a modular pump unit and in which the fluid-connecting channels of the respectively adjacent housings form intake and discharge channels which, on the one hand, lead on further and/or, on the other hand, lead outward.Type: ApplicationFiled: October 14, 2003Publication date: July 15, 2004Applicant: CRT COMMON RAIL TECHNOLOGIES AGInventors: Marco Ganser, Roland Kolb, Volker Schwarz, Fritz Spinnler
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Patent number: 6694954Abstract: In a fuel injection system for an internal combustion engine with a high pressure pump for supplying pressurized fuel to fuel injection valves and a multi-way valve disposed in the high pressure fuel line to the fuel injector for controlling the fuel flow to the injector, the multi-way valve is a spool valve which includes an actuator for positioning the spool to provide selectively a flow connection between the high pressure pump and the injection valve or between the injection valve and a fuel return line and which further includes an inflow throttle structure forming a pressure control device. A pressure sensor is arranged between the spool valve and the fuel injector and supplies the sensed pressure value to a controller which compares the value with predetermined set values and provides a correction value to the multi-way valve actuator for the correction of the pressure of the fuel supplied to the fuel injection valve.Type: GrantFiled: March 27, 2002Date of Patent: February 24, 2004Assignee: DaimlerChrysler AGInventors: Gerhard Fraenkle, Volker Schwarz
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Patent number: 6644282Abstract: 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.Type: GrantFiled: December 3, 2002Date of Patent: November 11, 2003Assignee: DaimlerChrysler AGInventor: Volker Schwarz
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Publication number: 20030116136Abstract: 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.Type: ApplicationFiled: December 3, 2002Publication date: June 26, 2003Inventor: Volker Schwarz
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Publication number: 20030107014Abstract: A hydraulic valve control arrangement is provided with a control line of a control cylinder, the control line being connected to a first oil volume, with a first control piston having a first control face and operatively connected to the first oil volume, and with a plunger piston which is arranged between the first control piston and an outlet valve and has a second control face and which is operatively connected to a second oil volume. A first control edge is provided between the control cylinder and the first control piston. The control edge switches a first throughflow connection between the first oil volume and the second oil volume operatively connected to a third control face of the first control piston.Type: ApplicationFiled: December 2, 2002Publication date: June 12, 2003Inventor: Volker Schwarz
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Patent number: 6527199Abstract: In a fuel injection valve for a pump-line-injector system of an internal combustion engine, comprising a fuel injector with a nozzle body, a nozzle needle longitudinally movably supported in the nozzle body between a seated nozzle closing position and a lift-off position assumed during fuel injection, the nozzle includes a fuel supply passage, a fuel drain passage, a connecting passage extending from the fuel supply passage to the fuel drain passage, and a spring-loaded pressure relief piston forming a control valve disposed in the path of the pressurized fuel from the fuel supply passage to the drain passage for controlling the pressure of the fuel supplied to the nozzle needle during fuel injection into a cylinder of the internal combustion engine.Type: GrantFiled: September 1, 2000Date of Patent: March 4, 2003Assignee: DaimlerChrysler AGInventor: Volker Schwarz
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Patent number: 6523526Abstract: In a method for operating a Diesel engine with a pump-line-nozzle injection system, which allows the pressure level to be raised in the lower and intermediate engine speed ranges in relation to a predetermined maximum permissible injection pressure without this maximum permissible injection pressure being exceeded in the upper engine speed range by providing an injection pump designed to deliver the desired fuel injection pressure at low and intermediate engine speeds and including a pressure relief valve in the fuel injection line permitting limiting of the fuel injection pressure at higher engine speeds.Type: GrantFiled: April 2, 2001Date of Patent: February 25, 2003Assignee: Daimler Chrysler AGInventor: Volker Schwarz
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Publication number: 20020148442Abstract: In a fuel injection system for an internal combustion engine with a high pressure pump for supplying pressurized fuel to fuel injection valves and a multi-way valve disposed in the high pressure fuel line to the fuel injector for controlling the fuel flow to the injector, the multi-way valve is a spool valve which includes an actuator for positioning the spool to provide selectively a flow connection between the high pressure pump and the injection valve or between the injection valve and a fuel return line and which further includes an inflow throttle structure forming a pressure control device. A pressure sensor is arranged between the spool valve and the fuel injector and supplies the sensed pressure value to a controller which compares the value with predetermined set values and provides a correction value to the multi-way valve actuator for the correction of the pressure of the fuel supplied to the fuel injection valve.Type: ApplicationFiled: March 27, 2002Publication date: October 17, 2002Inventors: Gerhard Fraenkle, Volker Schwarz
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Patent number: 6378932Abstract: A motor vehicle has an outer contour around which the headwind flows when driving has associated with it flow-influencing structure to reduce the air resistance of the motor vehicle is known. The flow-influencing structure are movably mounted in a vicinity of the outer contour and can be activated periodically with the aid of drive devices in order to introduce suitably time-dependent disturbances into the flow of the headwind in the vicinity of the flow-influencing structure.Type: GrantFiled: March 20, 2000Date of Patent: April 30, 2002Assignee: DaimlerChrysler AGInventors: Hermann Fasel, Albert Hack, Ralf Rossmanith, Jörg Russow, Volker Schwarz, Rainer Tiefenbacher
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Patent number: 6315531Abstract: A jerk pump provided for an internal combustion engine has an integral solenoid valve in which a pump plunger driven by a cam delivers fuel at high pressure through a channel that extends in the pump housing and through an injection line to an injection nozzle. An armature of the solenoid valve cooperates with a spring-loaded valve piston by which the channel-guiding high-pressure side can be connected with a low-pressure side. In order at least largely to avoid rebounding of the solenoid valve in such jerk pumps, provision is made such that the valve piston has an absorbent body held in its resting position by spring force, said absorbent body striking a stop body that holds the valve piston in its closed position when the valve piston is resting on its valve seat.Type: GrantFiled: August 30, 1999Date of Patent: November 13, 2001Assignee: DaimlerChrysler AGInventor: Volker Schwarz
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Publication number: 20010035167Abstract: A high-pressure injection system for internal combustion engines, in particular diesel engines, operates with an actuating force superimposed on a spring force which loads a nozzle needle in the closing direction. The high-pressure injection system operates in such a way that the pressure profile which occurs over the injection stroke of the pump and the resulting injection profile is varied by the actuating force.Type: ApplicationFiled: March 20, 2001Publication date: November 1, 2001Inventor: Volker Schwarz
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Publication number: 20010027778Abstract: In a method for operating a Diesel engine with a pump-line-nozzle injection system, which allows the pressure level to be raised in the lower and intermediate engine speed ranges in relation to a predetermined maximum permissible injection pressure without this maximum permissible injection pressure being exceeded in the upper engine speed range by providing an injection pump designed to deliver the desired fuel injection pressure at low and intermediate engine speeds and including a pressure relief valve in the fuel injection line permitting limiting of the fuel injection pressure at higher engine speeds.Type: ApplicationFiled: April 2, 2001Publication date: October 11, 2001Inventor: Volker Schwarz
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Patent number: 6273066Abstract: A fuel injection system for an internal combustion engine with a reservoir for pressurised fuel and at least one fuel injector which has a solenoid activated valve to control fuel pressure therein, and including a control piston linked to the injector's valving member and defining a control space communicated with the injector's fuel, and further including a pressure regulating valve assembly with another solenoid activated valve operated independently of the injector's solenoid valve and which is located between the reservoir and the fuel injector for selectively creating different flow control configurations to regulate fuel pressure delivered to the injector. The two solenoid activated devices providing an injector control for providing flexible opening operation of the injector at more than one fuel pressure level.Type: GrantFiled: April 26, 2000Date of Patent: August 14, 2001Assignee: DaimlerChrysler AGInventors: Gerhard Fränkle, Volker Schwarz
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Patent number: 6240907Abstract: A control valve for the fuel return in an injection line in internal combustion engines, which has a valve tappet which is arranged in a longitudinally displaceable manner and which exposes larger valve cross sections as the opening stroke increases and can be actuated against the restoring force of a valve spring by an electric magnet coil. The opening stroke and hence the valve cross section can be adjusted by a spring assembly having at least two actuating springs which can be deflected in the axial direction of the valve tappet and are arranged in parallel and in such a way that they can be subjected to force in an axially offset manner with the result that different resultant spring forces counteract the actuating movement in successive sections of the spring travel.Type: GrantFiled: February 22, 2000Date of Patent: June 5, 2001Assignee: DaimlerChrysler AGInventor: Volker Schwarz
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Patent number: 6062194Abstract: In a fuel injection system for an internal combustion engine with a fuel injection pump providing for an initial fuel injection and a main fuel injection wherein the fuel injection pump includes a main fuel supply passage section and a side passage and a main fuel control valve disposed in the main fuel supply passage section and an additional control valve arranged in the side passage, at low engine speeds, the main fuel control valve is closed during the initial and main fuel injection periods for generating a pressure sufficient to open a fuel injector nozzle and the additional fuel control valve is opened for reducing the fuel pressure and terminating initial fuel injection and, at high engine speeds, the main fuel control valve is closed during initial fuel injection and again for the main fuel injection.Type: GrantFiled: January 14, 1999Date of Patent: May 16, 2000Assignee: Daimler Chrysler AGInventor: Volker Schwarz
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Patent number: 5975056Abstract: In a process for regulating the injection quantities of injectors which are fluidically connected with a common pressure line in a common-rail injection system of an internal-combustion engine, a fuel pump provides fuel in the pressure line under a static nominal pressure. Control signals for opening and closing within individual injection periods for achieving respective identical injection quantities are supplied to the injectors by a regulator unit. In the case of different flow rates of the individual injectors respective identical injection quantities are achieved by the regulator unit by changing the respective injection period on the basis of a measuring signal. For this purpose, a pressure gauge inserted into the pressure line generates a measuring signal from a measurement of the static measuring pressure in the pressure line in each case after the closing of an injector.Type: GrantFiled: January 12, 1998Date of Patent: November 2, 1999Assignee: DaimlerChrysler AGInventors: Ulrich Augustin, Volker Schwarz
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Patent number: 5772123Abstract: An injector with solenoid-valve control provided for diesel internal-combustion engines has a lateral fuel delivery conduit into a pressure accumulator reaching, on one hand, as far as the needle seat of a nozzle needle and on the other hand as far as a piston arranged on the rear side of the nozzle needle. A control space in the injector is connected by a controllable solenoid valve to the pressure accumulator or, for pressure relief, to a low-pressure conduit. A fuel filter is arranged in the pressure accumulator in the mouth region of the fuel delivery conduit.Type: GrantFiled: October 24, 1995Date of Patent: June 30, 1998Assignee: Mercedes-Benz AG and Robert Bosch GmbHInventors: Ulrich Augustin, Volker Schwarz, Klaus-Juergen Thiele, Ekkehard Koehler, Kurt Oberklammer, Heinz Rathmayr, Peter Reisenbichler
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Patent number: 5727516Abstract: In a method of controlling the operation of an internal combustion engine with fuel injection by way of a common high pressure (common rail) fuel supply line to which high pressure fuel is supplied by a high pressure fuel pump and from which fuel is admitted to the various cylinders of the internal combustion engine by valve controlled fuel injection nozzles, the fuel pressure in the common fuel supply line between the end of an injection and the start of a fuel supply period is monitored at distinct timely spaced measurement points and, if a pressure difference between the measurement points is sensed in excess of a predetermined limit value indicating an injector malfunction, the high pressure fuel supply to the common fuel supply line is interrupted by deactivating the high pressure fuel pump while fuel injection through the operative nozzles is maintained so as to rapidly reduce the pressure in the common fuel supply line.Type: GrantFiled: March 24, 1997Date of Patent: March 17, 1998Assignee: Mercedes - Benz AGInventors: Ulrich Augustin, Volker Schwarz
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Patent number: 5708202Abstract: In a method of recognizing operating errors in the fuel injection system of an internal combustion engine wherein fuel is supplied by a fuel pump via a common fuel supply line to a number of fuel injectors, the fuel pressure in the common fuel supply line is determined at least at two predetermined points in time between which the pressure should not change when the system is properly operating and an operating error is indicated if a difference in pressure is determined which exceeds a predetermined threshold value.Type: GrantFiled: June 5, 1996Date of Patent: January 13, 1998Assignee: Mercedes-Benz AGInventors: Ulrich Augustin, Volker Schwarz
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Patent number: 5577892Abstract: In a method of injection fuel for Diesel engine comprising a high pressure injection pump with a fuel supply line for supplying high pressure fuel to fuel injection nozzles wherein a fuel control line extends between the pump and a low pressure fuel supply line for discharge in excess fuel thereto under the control of a magnetic valve which is closed to end the discharge of excess fuel and initiate pumping of fuel, the magnetic valve is opened at the end of fuel pumping at a point corresponding to a piston stroke length h after the upper dead center of the piston such that, when communication between the pump and the low pressure fuel line is established, pressure pulses in the low pressure fuel line are avoided.Type: GrantFiled: March 22, 1996Date of Patent: November 26, 1996Assignee: Mercedes Benz AGInventors: Michael Schittler, Ulrich Augustin, Volker Schwarz, Hermann Hiereth