Man Truck & Bus Ag

Man Truck & Bus Se.

Andreas Pappenheimer

Andreas Sommermann

Reinhard Lämmermann

Joachim Weiss

A method and a control device for raising and/or lowering an exhaust gas temperature of a combustion engine having an exhaust gas aftertreatment device arranged in an exhaust line sets the exhaust gas temperature for the exhaust gas aftertreatment using an electric-motor mode and/or a generator mode of an electrified exhaust turbocharger.

Method and device for raising and/or lowering an exhaust gas temperature of a combustion engine having an exhaust gas aftertreatment device arranged in an exhaust line

A method for cold start pre-warming of a pressure-charged internal combustion engine and/or of an exhaust gas aftertreatment device of a internal combustion engine, includes arranging a cold-starting aid in the intake duct for warming the charge air while the engine is stationary. The internal combustion engine has at least one working cylinder with at least one inlet valve and at least one outlet valve and further includes a device for setting a valve position. The internal combustion engine can be pressure-charged by a pressure-charging device operable by an electric motor. In the method, after detection of a cold start of the internal combustion engine: the cold-starting aid is activated while the engine is stationary; electric-motor operation of the pressure-charging device is activated; and a valve overlap between at least one inlet valve and at least one outlet valve is set.

Method for cold-start pre-warming of a pressure-charged internal combustion engine and/or of an exhaust gas aftertreatment device

An internal combustion engine of a motor vehicle has a multi-channel fresh gas system with a plurality of fresh gas lines leading to different cylinder groups. At least one shut-off element is connected in each of the fresh gas lines and coupled to a control and/or regulating device. A multi-channel exhaust system for the discharge of exhaust gas out of the cylinders has a plurality of exhaust lines leading away from the different cylinder groups. A multi-channel exhaust-gas recirculation system has exhaust-gas recirculation lines, for recirculating exhaust gas from the exhaust system to the fresh gas system. The method and device utilize crossed-channel exhaust-gas recirculation, in which the exhaust-gas recirculation lines branching off from the exhaust lines of a certain channel lead back in each case to fresh gas lines of a different channel. The shut-off elements of the individual fresh gas lines are actuated such that a fresh gas line which is shut off from the fresh gas supply by a shut-off element is supplied with exhaust gas from an exhaust line of a different channel, whose associated fresh gas line is not shut off from the fresh gas supply, via an exhaust-gas recirculation line.

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Ellingen, Germany

Andreas Pappenheimer