Robert Boschgmbh

Robert Bosch Gmbh

Achim Brenk

Manfred Mack

Uwe Gordon

Wolfgang Klenk

Hans-Christoph Magel

Nadja Eisenmenger

Andreas Wengert

Dieter Seher

Gregory Rewers

Martin Kropp

Nestor Rodriguez-Amaya

Peter Boehland

Andreas Kellner

Detlev Potz

Thomas Kuegler

Walter Egler

Hubert Greif

Juergen Hanneke

Werner Teschner

Michael Mennicken

Sebastian Kanne

Juergen Hammer

Bernd Becker

Helmut Clauss

Dirk Vahle

Hansjoerg Egeler

Joachim Boltz

Giovanni Ferraro

Gerhard Mack

Martin Katz

Roland Bleher

Falko Bredow

Volkmar Kern

Hrvoje Lalic

Heike Bastian

Reinhard Tampe

Goran Kanis

Ingolf Kahleyss

Lorenz Zerle

Joachim Schurr

Thomas Wuerzbach

A method for operating a line circuit () for waste heat utilization of an internal combustion engine (), and a control unit (). A feed pump (), at least one heat exchanger (), an expansion machine (), a condenser () and a control unit () are situated in the line circuit (). The control unit () calculates a time period which is required until individual components or all the components of the line circuit () have reached a predefined temperature, in order to start up the line circuit () at least partially.

Method and control unit for operating a line circuit for waste heat utilization of an internal combustion engine

The invention relates to a method for operating a steam cycle process for using the heat of an internal combustion engine (), comprising a conduction circuit () in which a working medium circulates. Said conduction circuit () comprises at least one pump (), at least one heat exchanger (), an expansion machine (), a feedwater tank () for storing the liquid working medium, and a condenser (). Components of the conduction circuit () are frost-proofed by partially evacuating the liquid working medium. After the end of the circulation of the working medium, at least one of the pumps () continues to operate in order to evacuate the working medium at least from the pump () which continues to operate.

Method for operating a steam cycle process

An electromagnetic clutch (4) which serves for connecting a steam engine (2) to a combustion engine (3), wherein a first shaft (8) which can be driven by the steam engine (2) and a second shaft (9) which can be driven by the internal combustion engine (3) are provided, wherein an intermediate gear (23) which is connected to the first shaft (8) and a clutch bell (26) which is at least indirectly connected to the second shaft (9) are provided, wherein a freewheel (27) is provided between the intermediate gear (23) and the clutch bell (26).

Electromagnetic clutch for connecting a steam engine to a combustion engine

The invention relates to a device and a method for the recovery of waste heat from an internal combustion engine (), according to which a feed pump (), a heat exchanger (), an expansion engine () and a capacitor () are arranged in a circuit () containing a circulating working medium. A bypass connection () is mounted in parallel to the expansion engine (), in the circuit (), the expansion engine () being coupled to the circuit (), or decoupled therefrom, according to an operating situation of the internal combustion engine ().

Device and method for the recovery of waste heat from an internal combustion engine

Disclosed is a fuel injection device comprising a housing and a valve element disposed therein and cooperating with a valve seat located in the area of at least one fuel discharge port. The valve element is composed of several parts while at least two parts of the valve element are coupled to each other via a hydraulic coupler.

Fuel injection device for an internal combustion engine using direct fuel injection

An apparatus for injecting fuel into an internal combustion engine having a fuel injector acted on with highly pressurized fuel actuated by means of a metering valve device that is able to control the pressure in a pressure booster control chamber so that in a pressure booster pressure chamber delimited by a pressure booster piston which can be filled via a check valve with high-pressure fuel and communicates with an injection valve member pressure chamber, the pressure booster piston increases the pressure, causing an injection valve member for injecting fuel to open. To assure a correct injection quantity even if an abrupt pressure drop occurs in the high-pressure fuel source, the pressure booster piston is situated and designed so that if a pressure drop occurs in the high-pressure fuel source, then starting from its neutral position, the pressure booster piston has the capacity to execute a pressure compensation movement by means of which the pressure in the pressure booster pressure chamber is adapted to the pressure of the high-pressure fuel source.

Fuel injection apparatus

A fuel injector in injection systems for internal combustion engines having a valve body containing a control chamber that can be pressure-relieved and can be acted on with fuel via an inlet throttle and can be pressure-relieved via an outlet throttle. A first actuator can actuate a closing element. The valve body is connected to a holding body that has a nozzle body connected to it, which encompasses an injection valve element. In order to relieve the pressure in the control chamber, an additional, second outlet throttle is provided, whose closing element can be actuated either by an additional actuator or as a function of the power supply to a double-switching actuator.

Fuel injector with and without pressure ampification with a controllable needle speed and method for the controlling thereof

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. The closing chamber can be made to communicate with the low-pressure return system as well, via a closing chamber throttle; the outlet throttle has a greater throttling action than the closing chamber throttle, so that the pressure in the closing chamber drops first, and only after a delay does the pressure in the damping chamber drop as well.

Fuel injection system for internal combustion engines with needle stroke damping

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.

3/2 Directional-control valve

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.

3/2-way valve

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.

Seat/slide valve with pressure-equalizing pin

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.

Injection nozzle

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.

Control valve and fuel injection valve provided with same

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. The first pressure space communicates via a throttle with a damping chamber, embodied as a blind bore and otherwise closed off, as a result of which pressure fluctuations that occur upon closure of the control valve are rapidly damped.

Fuel injection system for internal combustion engines

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.

Growing community of inventors

Kaempfelbach, Germany

Achim Brenk