Mercedes-benz Aktiengesellschaft

Daimler Chrysler Ag

Daimler-benz Ag

Gustav Wahler Gmbh U. Co. Kg

Franz Bender

Gernot Hertweck

Joachim Wiltschka

Detlef Panten

Dirk Naber

Bernd Bareis

Michael Grohn

Peter Moser

Rudiger Pfaff

Hermann Büter

Mathias Elsaesser

R&uuml;diger Pfaff

J&uuml;rgen Huter

Klaus Blumensaat

Philipp Weber

Wolfgang Burthel

Bernd Dr-Ing Bareis

Mathias Dipl-Ing Elsässer

In a device for exhaust gas recirculation, with an intake duct and an exhaust gas recirculation duct, which projects into the intake duct and via which exhaust gas is recirculated to the fresh air in the intake duct, the exhaust gas recirculation duct has an outlet orifice oriented toward the fresh gas inlet flow and a diverting device is disposed in front of the outlet orifice for redirecting the exhaust gas discharged front the outlet orifice in the direction of flow of the fresh air in the intake duct.

Device for exhaust-gas recirculation

The invention relates to an exhaust gas control valve with a first valve part ( ) and a second valve part ( ), which rest on one another with one side ( ), the valve parts ( ) in each case having passages ( ) and being rotatable relative to one another between an open position permitting the passage of exhaust gases and a closed position, blocking this passage. Webs ( to ), which protrude on one axial side of the first valve part ( ), surround the openings ( ) and, with their free narrow surfaces, form supporting surfaces for the second valve part ( ), which is constructed flat on its side ( ) facing the first valve part ( ) and essentially rests with this surface on the narrow surfaces of the webs ( to ) and slides during the relative rotational adjustment, extend along the boundary edges ( to ), surrounding the passages ( ) of the first valve part ( ).

Control valve, especially for an internal combustion engine, for the controlled recycling of exhaust gases

A device for recycling exhaust gases from an internal combustion engine via an exhaust gas line in its intake area is equipped with an exhaust gas valve that is positioned within a valve chamber and closes off or opens up the connection to a combustion chamber of an internal combustion engine. A valve actuating mechanism is located within the valve chamber. The valve chamber is equipped with at least one cooling channel.

Device for recirculating the exhaust gas of an internal combustion engine

In an internal combustion engine having an air intake system and an exhaust outlet system, and an exhaust gas recirculation system which has an exhaust-gas recirculation line and an exhaust-gas recirculation valve for supplying a controlled quantity of exhaust gas to the air intake system, the recirculation valve is separated from the apparatus which introduces the exhaust gas into the air intake so that it is exposed only to exhaust gas and not to the air intake flow.

Exhaust gas recirculation valve

In an exhaust gas recirculation arrangement for an internal combustion engine with an air intake duct for supplying air to the engine, an exhaust gas recirculation pipe extending into the air intake duct for recirculation exhaust gas to the air intake duct and a disc valve arranged in the exhaust gas recirculation pipe for closing the exhaust gas recirculation pipe, the exhaust gas recirculation pipe has a pipe section which extends in the air intake duct in a downstream direction from the disc valve and has, at its downstream end, a nozzle-like discharge opening for discharging exhaust gas into the air intake duct.

Exhaust gas recirculation arrangement

In a valve control for an internal combustion engine, particularly an exhaust gas recirculation valve comprising a valve with a valve stem and a valve disc axially movably supported in a housing for moving the valve disc out of, and into, seating engagement with a valve seat for opening and closing a gas flow passage, a rotary magnet structure with a motion transmitting mechanism is provided with an actuator arrangement for converting rotation of the rotary magnet to axial motion of the valve member by way of a cam track structure disposed between means rotating with the rotary magnet arrangement and a valve guide supporting the valve for only axial movement from and onto the valve seat.

Value control for an internal combustion engine

In an internal-combustion engine, in particular a diesel engine, with an exhaust-gas filter and an exhaust gas recirculation, the exhaust counter-pressure prevailing upstream of the exhaust-gas filter is used as one of a number of controlled variables for automatically controlling the exhaust gas recirculation. Since the exhaust-gas filter experiences flow resistance variations, particularly if it is a soot burn-off filter, which variations are independent of engine operation and consequently falsify the automatic control of the exhaust gas recirculation, the respective instantaneous exhaust-gas filter flow resistance must be measured as a correcting quantity and taken into account. A measuring device is fitted into a bypass line bridging the exhaust-gas filter and operates with a negligible bypass flow such that, above a predeterminable upper exhaust-gas filter differential pressure, it can lead past the exhaust-gas filter an increased bypass flow, which can, if appropriate, correspond to the entire exhaust flow.

Diesel engine with an exhaust-gas filter

A method of actuating a throttling element in the intake system of an air-compressing fuel-injected internal combustion engine, which in low load and speed ranges is held in the closing position and in central and high load and speed ranges is held in an opening position. The throttling element in each operating point of the internal combustion engine is adjusted to that opening position which corresponds to an absolute pressure, determined from a load-dependent and speed-dependent characteristic diagram, in the intake system downstream of the throttling element, the setpoint value for the absolute pressure being corrected as a function of further operating parameters of the internal combustion engine.

Method of actuating a butterfly valve arranged in the intake system of

In an exhaust-gas recycling device for internal-combustion engines, especially diesel engines, in which the exhaust-gas recycling quantity is controlled as a function of the engine running via an exhaust-gas recycling valve mounted in the exhaust-gas recycling line, it is to be possible to regulate the exhaust-gas recycling flow quantity independently of flow resistances changing in the fresh-gas intake and exhaust-gas lines. For this purpose, changes of flow resistance in the fresh-gas intake and exhaust-gas lines are fed as additional pressure control signals to the exhaust-recycling valve. A change of flow resistance in the exhaust-gas line can occur particularly as a result of a soot burn-off filter which is installed there an on which the soot is burnt off at irregular time intervals.

Exhaust-gas recycling device for an internal-combustion engine

The invention relates to an actuating device for a throttle valve arranged in an intake pipe in a diesel internal combustion engine, having a mechanical adjusting linkage for the load-dependent adjustment of the throttle valve, the adjusting linkage having an idle path. In order to be able to control the throttle valve as a function of a plurality of operating parameters, an actuator actuated by an auxiliary force is proposed via which the throttle valve position predetermined as a function of load can be altered within the idle path.

Actuating device for a throttle valve arranged in an intake pipe of a

In an exhaust-gas recycling device for an internal combustion engine, especially a diesel engine, in which the quantity of the recycled exhaust-gas part stream is controlled by an exhaust-gas recycling valve equipped with a diaphragm, the material of which can be destroyed above a specific temperature, a reliable closing of the valve before the critical diaphragm temperature is reached will be achieved. For this purpose, the diaphragm is loaded by a spring, the spring force of which is temperature-dependent. If the temperature dependence is to set, for example by the use of a memory material, that, in a predeterminable upper temperature range, the spring force increases with an increasing temperature, the valve can be closed to prevent diaphragm overheating in an engine-operating state in which it would still be opened per set for the recycling of exhaust gas. Not only a memory alloy, but also a bimetal or combination of these two materials is suitable as a material for a spring acting in this way.

Exhaust-gas recycling device for an internal-combustion engine,

A vacuum supply system for a brake power assist unit of a motor vehicle with at least one additional vacuum consuming device is achieved by the installation of a valve, which can be switched as a function of existing vacuum level in a pipe leading from the vacuum generating device to the at least one additional consuming device. Switching of the valve causes a throttling of this pipe to be more extensive when the existing vacuum level is above a certain absolute pressure value.

Vacuum supply system with throttling valve in a motor vehicle

A vacuum supply system for a brake power assist unit of a motor vehicle and at least one additional vacuum consuming device, is achieved by a parallel arrangement of two pipes leading from a vacuum generating device one to the brake power assist unit and one to the additional consuming device. Both pipes are equipped with flow control devices one of which is blockable by means of a check valve with an increased restoring or closing force for securing a vacuum supply priority for the brake power assist unit.

Vacuum supply system in a motor vehicle

A vacuum control system for devices in vehicles is disclosed, such as for controlling air-conditioning and heating equipment. Temperature-sensitive control valves which are inserted in the cooling-water circuit of an internal-combustion engine are automatically operated at a specific temperature to control a pneumatic actuator located vacuum control circuit for the devices.

Pneumatic control system

A valve guide arrangement for a valve in a bypass or shunt duct of exhaust gas ducting equipment of naturally induced or supercharged engines, in which arrangement the stem of the valve is caused to slide in a valve guide formed as a bush and fixed rigidly in a housing part and an annular space is provided under the valve guide and surrounding the valve stem and operating as a settling space, this annular space being connected with the bypass or shunt duct by means of an annular gap operating as a throttle and formed by the valve stem and the housing part. The object of this special valve guide arrangement is to prevent valve jamming due to the solid exhaust-gas constituents found in the exhaust gas flow.

Growing community of inventors

Wendlingen, Germany

Franz Bender