Man Truck & Bus Ag

Man Energy Solutions Se

Man Nutzfahrzeuge Ag

Man Diesel & Turbo Se

Man Nutzfahrzeuge Gmbh

Man Truck & Bus Se.

Andreas Döring

Eberhard Jacob

Plamen Toshev

Andreas Sommermann

Dieter Rothe

Marco Tilinski

Andreas Kistner

Richard Losher

Florian Walde

Markus Bauer

Peter Spaniol

Armin Weber

Matthias Auer

Alexander Knafl

Ralf Steinert

Andreas Klingsporn

Francis Nana

Petra Seidel

Ingo Bader

Florian Wälde

Jochen Philipp

Mirko Bugsch

Henry Munitzk

Julia Maier

Klaus Richter

Martin Faber

Peter Lauer

The process and apparatus according to the invention allow the production of hydrocarbons and ammonia without the use of catalysts. For this purpose, waste gases containing COor Nfrom an upstream process are fed to compression reactors. In addition, hydrogen from an electrolyzer is fed to these reactors to enable hydrogenation of the fed substances. Methane, alcohols and ammonia, for example, can be produced by this process. In order to increase the yield of the process, it is planned to raise the reactant pressure with the aid of a compressor.

Method and apparatus for the production of chemical compounds

Method for operating an internal combustion engine which has a gas combustion system and an exhaust gas post-treatment system. Exhaust gas that leaves the gas combustion system is directed to at least one CH4 oxidation catalytic converter of the exhaust gas post-treatment system. The CH4/NO2 mole ratio in the exhaust gas is set in a defined fashion by at least one gas-combustion-system-side and/or exhaust-gas-post-treatment-system-side measure upstream of at least one CH4 oxidation catalytic converter.

Internal combustion engine and method for operating same

A method for operating an internal combustion engine with multiple cylinders. Each cylinder of the internal combustion engine includes at least one fuel injector, and each fuel injector is activated for opening and closing via a solenoid valve of the respective fuel injector. Structure-borne sound waves emitted by the fuel injectors and/or accelerations caused by the fuel injectors are detected by measurement. The structure-borne sound waves detected by measurement and/or the accelerations detected by measurement are evaluated, and based on the evaluation, characteristics of the fuel injectors are automatically determined.

Method and control system for operating an internal combustion engine

An exhaust-gas aftertreatment device () for an internal combustion engine, particularly for a marine diesel internal combustion engine operated using heavy fuel oil, includes a housing (); an exhaust-gas chamber () defined by the housing (), for permitting exhaust gas to flow continuously through the housing (), an inlet () for permitting exhaust gas to flow into the housing and an outlet () for permitting exhaust gas to flow out of the housing (); a sound damping chamber (), defined by the housing () and coupled with the exhaust-gas chamber (). The sound dampening chamber () is constructed to receive a fluid or a pourable solid at a fill level depending on the frequency of an exhaust sound to be damped.

Exhaust gas aftertreatment device and exhaust gas aftertreatment method

Catalytic converter unit for an exhaust gas catalytic converter, in particular an SCR catalytic converter unit for an SCR catalytic converter of a marine diesel internal combustion engine, with multiple catalytic converter modules. Each catalytic converter module has a ceramic catalytic converter body through which exhaust gas flows and a metallic casing for the ceramic catalytic converter body. The respective ceramic catalytic converter body is received in the respective metallic casing and is surrounded in certain sections by the latter. The catalytic converter modules are positioned with first flowed-through ends on a support grating. A counter-brace is positioned at the opposite second flowed-through ends of the catalytic converter modules, and the catalytic converter modules are clamped between the support grating and the counter-brace.

Catalytic converter unit and exhaust gas catalytic converter

A mixing apparatus for mixing a precursor substance of a reducing agent with exhaust gas, having a housing that provides a mixing chamber and a silencer. The housing inlet side has an inlet connection for exhaust gas and an outlet side having an outlet connection for reducing agent intermixed with the exhaust gas to be discharged. Longitudinal axes of the inlet and outlet connections are offset and parallel relative to one another. An introduction device introduces a precursor substance of the reducing agent and is positioned at the inlet side in a region of the outlet connection longitudinal axis. A length of the housing between the inlet and outlet side at least 1.9 to 7 times a diameter of the inlet connection. A width of the housing is maximally 3 times the diameter of the inlet connection.

Mixing apparatus for an exhaust gas aftertreatment system, exhaust gas aftertreatment system and internal combustion engine

An exhaust gas post treatment system for an internal combustion engine, in particular a heavy fuel oil-powered engine, including an SCR catalyst, using ammonia as a reducing agent for the denitration of the exhaust gas, and a device positioned upstream of the SCR catalyst by which ammonia or an ammonia precursor substance, which is converted to ammonia, is introduced upstream of the SCR catalyst. Downstream of the SCR catalyst an exhaust gas scrubber is positioned, by which excess ammonia, contained in the exhaust gas leaving the SCR catalyst, together with sulfur oxides, can be scrubbed out of the exhaust gas forming ammonium salts while maintaining a pH value of approximately 6. For the control thereof, a bypass around the SCR catalyst can be provided as a westgate, or comprising an additional SCR catalyst.

Exhaust gas post treatment system and method for exhaust gas post-treatment

Disclosed is an exhaust-gas after-treatment device for an internal combustion engine, in particular for a ship's diesel internal combustion engine that is operated with heavy oil, including: a housing through which exhaust gas flows; exhaust-gas purification chambers formed in the housing, which chambers hold catalysts and/or particulate filters in order to purify the exhaust gas; and muffler chambers formed in the housing, which chambers have a defined depth for muffling sound in the flow direction. The exhaust-gas purification chambers and the muffler chambers are arranged spatially in series and parallel to one another on the flow side.

Exhaust-gas after-treatment device

Method for the operation of an internal combustion engine having a plurality of cylinders (to detect misfires. An exhaust gas sensor at the exhaust gas of every cylinder of the internal combustion engine measures at least one actual exhaust gas value individually for the respective cylinder, and the respective measured actual exhaust gas value is compared with a reference exhaust gas value to determine at least one cylinder-specific deviation between the reference exhaust gas value and the actual exhaust gas value for each of the cylinders. It is determined for every cylinder based on the cylinder-specific deviation or based on every cylinder-specific deviation whether or not misfires are occurring at the respective cylinder.

Method for operating an internal combustion engine

A method for operating a system having a plurality of internal combustion engines coupled together such that then outputs are drawn off by a common load, a downstream individual exhaust gas aftertreatment device, in which the exhaust gas of a particular engine undergoes an individual exhaust gas aftertreatment, positioned downstream of each engine, or a common exhaust gas aftertreatment device, in which the exhaust gas undergoes a common exhaust gas aftertreatment, positioned downstream of to the engine. To regenerate an exhaust gas aftertreatment device, the drive output of one engine is reduced, the temperature of the exhaust gas is increased, and the drive output of a second engine is increased such that the drive output reduction is at least partially compensated for.

Method and control device for operating a system consisting of a plurality of internal combustion engines

An internal combustion engine includes: plural cylinders, a first exhaust gas turbocharger having a high-pressure turbine and a high-pressure compressor, a second exhaust gas turbocharger having a low-pressure turbine and a low-pressure compressor, and an SCR catalytic converter positioned between the high-pressure turbine and the low-pressure turbine, via which exhaust gas leaving the high-pressure turbine is conducted upstream of the low-pressure turbine. The low-pressure compressor is assigned a power take-in, via which the low-pressure compressor can be driven when as a consequence of a relatively large exhaust gas temperature drop at the SCR catalytic converter via the low-pressure turbine an adequate amount of energy required to supply the cylinders of the internal combustion engine with a desired quantity of charge air can no longer be provided.

Internal combustion engine, method for operating the same and control device for carrying out the method

A catalyst unit includes: a ceramic catalyst body through which exhaust gas flows and having a substantially cuboid contour with a substantially rectangular inflow side and a substantially rectangular outflow side; a housing that at least partially encloses the catalyst body, and at least one bearing mat positioned in a gap formed between the catalyst body and the housing. Borders or edges of the catalyst body, which delimit the inflow side and the outflow side, each have dimensions of between 210 mm and 280 mm. The gap between the catalyst body and the housing, seen perpendicularly to the throughflow direction of the catalyst body, has a dimension determined according to the following relationship: s&#x2264;p*5, s being the dimension of the gap in mm and p the dimensionless amount of the density of the or each bearing mat expressed in kg/m2.

Catalyst unit and exhaust gas catalyst

A catalyst unit for an exhaust gas catalyst, having a ceramic catalyst body, and a metallic housing which encloses the catalyst body at least in some sections perpendicular to a gas throughflow direction. At least one bearing mat positioned between the catalyst body and the housing perpendicular to the throughflow direction. The catalyst body is retained in the housing via a force-closed press fit with the intermediate arrangement of the or each bearing mat such that, when seen in the throughflow direction of the catalyst body, the press fit between the housing and the catalyst body is formed exclusively at defined axial positions, the housing having groove-like depressions at the defined axial positions for reducing in some sections the inner cross-section of the housing, and the press fit between the housing and the catalyst body being formed exclusively in the region of the groove-like depressions.

Catalyst unit, method for producing the same, and exhaust gas catalyst

A method for operating an internal combustion engine having a plurality of cylinders includes: measuring, by exhaust gas sensors arranged at an exhaust gas of every cylinder for which cylinder-specific combustion control is carried out, for each respective cylinder, at least one actual combustion value; comparing each respective measured actual combustion value with a reference combustion value to determine at least one cylinder-specific control deviation for every cylinder for which cylinder-specific combustion control is carried out; determining at least one cylinder-specific control variable for every cylinder for which cylinder-specific combustion control is carried out based on the cylinder-specific control deviation or on every cylinder-specific control deviation; and operating each cylinder for which cylinder-specific combustion control is carried out based on the respective cylinder-specific control variable to bring the respective actual combustion value closer to the respective reference combustion value and minimize the respective control deviation.

Method for operation of an internal combustion engine

A method is provided for operating a vehicle, in particular a watercraft, with at least one combustion engine that emits pollutants contained in an exhaust gas or wastewater. The current position of the vehicle is determined by a location determination. A closed-loop and/or open-loop control device is provided which sets or adjusts the quantity of at least one pollutant emitted by the combustion engine in a self-acting manner or automatically, in accordance with the determined position of the vehicle and with information on local pollutant regulations, in particular exhaust and/or water regulations.

Growing community of inventors

Munich, Germany

Andreas Döring