Volkswagen Ag

Audi Ag

Florian Zink

Jens Wodausch

Boris Blasinski

Christoph Nee

Christoph Schweitzer

Michael Leihenseder

René Schimmel

Bernhard Maderer

Jan Knaup

Philipp Prochazka

Herr Sebastian Hemminger

Florian Freund

Marcel Leise

Claus-Jürgen Becker

A method for operating an internal combustion engine having multiple cylinders. A warm-up operation is carried out after the internal combustion engine has been started, during which a speed of the internal combustion engine is limited to a limit value. The limit value is selected during the warm-up operation at least temporarily as a function of a starting temperature of the internal combustion engine.

Method for operating an internal combusting engine, and corresponding internal combustion engine

The invention relates to a method for regenerating a particulate filter in the exhaust gas channel of a motor vehicle with a hybrid drive consisting of an electric motor and an internal combustion engine. In this context, the internal combustion engine is lugged by the electric motor in order to regenerate the particulate filter. The internal combustion engine transports oxygen-rich air into the exhaust gas channel, a process in which the soot retained in the particulate filter is oxidized by the oxygen and the particulate filter can thus be regenerated. In this process, during the regeneration of the particulate filter, the quantity of air is controlled by a throttle valve in the air supply means of the internal combustion engine in order to allow the particulate filter to be regenerated as quickly and efficiently as possible. The invention also relates to a motor vehicle with a hybrid drive comprising an internal combustion engine and an electric motor, whereby the hybrid drive has a control unit to carry out such a method for the regeneration of the particulate filter.

Method and device for regenerating a particulate filter in a motor vehicle with a hybrid drive

A method for operating a hybrid drive apparatus for a motor vehicle, having an exhaust-gas-producing internal combustion engine and an electric motor. The internal combustion engine and the electric motor, respectively alone or at least sometimes jointly, provide a drive torque, wherein, when a start threshold value is exceeded by a demand variable. The internal combustion engine is started and the drive torque is at least partially generated by the internal combustion engine, and, when a stop threshold value is not met by the demand variable, the internal combustion engine is stopped and the drive torque is generated solely by means of the electric motor.

Method for operating a hybrid drive apparatus for a motor vehicle as well as a corresponding hybrid drive apparatus

The invention relates to a method for regenerating a particle filter in an exhaust system of an internal combustion engine, comprising at least the following steps: a) performing a first regeneration of the particle filter until a lower threshold value of a particle load of the particle filter is reached; b) performing a verification measurement, wherein the internal combustion engine is operated at a first operating point such that an exhaust gas having at least&#x2014;an excess of oxygen or&#x2014;an elevated first temperature is provided upstream of the particle filter; wherein, if an increase of a second temperature is detected downstream of the particle filter during or after step b), c) a second regeneration of the particle filter is initiated.

Method for regenerating a particle filter

The invention relates to a method for regenerating a particle filter () in an exhaust system () of a motor vehicle () having an internal combustion engine (). Here, for a temperature increase to a temperature (T) required for the regeneration of the particle filter (), a sorption agent container () of a fuel tank () of the motor vehicle () is purged, and the fuel vapours () retained in the sorption agent container (), in particular an activated carbon filter, are supplied directly or indirectly to the exhaust system () upstream of the particle filter (). By means of an exothermic conversion of the fuel vapours () in the exhaust system () upstream of the particle filter (), the exhaust-gas temperature (T) can be increased without the need for engine-internal measures for increasing the exhaust-gas temperature.

Method for regenerating a particle filter, and motor vehicle having a particle filter

A method for operating an internal combustion engine which has a number of cylinders and which comprises a fuel system and a fresh air system, whereby fuel is fed in a fuel mass flow via a fuel supply line of the fuel system to the cylinders at a prescribable air-fuel ratio directly by means of the injectors, and fresh air is fed in a fresh air mass flow via a fresh air system, whereby the fuel system comprises a tank venting system with a tank venting line that has a tank venting valve and that, via the interconnected tank venting valve, is connected to at least one line section of the fresh air system via at least one feed point, thereby forming at least one venting path, whereby, owing to a pressure which prevails at the at least one feed point and which is negative relative to the tank venting line and dependent on the load point, the fuel tank of the tank venting system is vented via the at least one venting path, a venting process in which a purging air mass flow containing fuel is removed from the tank venting system and fed to the cylinders as a portion of the fresh air mass flow, so that a total fuel mass flow is fed into the cylinders directly by means of the injectors of the fuel system as well as indirectly via the fresh air mass flow. It is provided that the direct feed of fuel by means of the injector of at least one of the cylinders is blocked, as a result of which a purging air mass flow comprising the fuel volume equivalent that is now absent due to the blocking of the at least one cylinder can advantageously be removed from the tank venting line, while maintaining the prescribed air-fuel ratio via the at least one venting path at the at least one feed point, and this purging air mass flow can be fed as a portion of the fresh air mass flow to the cylinder(s) that is/are still being supplied with fuel.

Method for increasing the quantity of purging air in the tank venting system by completely blocking the injection of at least one cylinder

A method for regenerating at least one particle filter of a vehicle with an electric drive and an internal combustion engine. The supplying of an energy storage device of the vehicle with electric energy is paused upon reaching a first charging threshold of at least one particle filter, so that the at least one particle filter is charged to a predetermined threshold value. Upon reaching a second charging threshold of the at least one particle filter by the internal combustion engine, an enthalpy that is introduced by the internal combustion engine into the at least one particle filter is increased relative to an enthalpy that is due to the charge that is associated with the operations.

Growing community of inventors

Bad Rappenau, Germany

Florian Zink