Abstract: An internal combustion engine has a combustion chamber, an intake tract through which air can flow, a first tank for a liquid spark-ignition fuel, a second tank for water, a mixing region, in which the spark-ignition fuel from the first tank is to be mixed with the water from the second tank thereby creating a mixture having the spark-ignition fuel and the water, an injection valve which is allocated to the combustion chamber and by which the mixture can be injected directly into the combustion chamber, and a second injection valve which is allocated to the combustion chamber and provided in addition to the injection valve and by which in relation to the water and the spark-injection fuel, only the spark-injection fuel from the first tank can be injected at a location upstream of the combustion chamber into the intake tract and thus into the air flowing through the intake tract.

Abstract: An internal combustion engine has a combustion chamber, an intake tract through which air can flow, a first tank for a liquid spark-ignition fuel, a second tank for water, a mixing region, in which the spark-ignition fuel from the first tank is to be mixed with the water from the second tank thereby creating a mixture having the spark-ignition fuel and the water, an injection valve which is allocated to the combustion chamber and by which the mixture can be injected directly into the combustion chamber, and a second injection valve which is allocated to the combustion chamber and provided in addition to the injection valve and by which in relation to the water and the spark-injection fuel, only the spark-injection fuel from the first tank can be injected at a location upstream of the combustion chamber into the intake tract and thus into the air flowing through the intake tract.

Abstract: A method and device are provided for increasing the possible compression ratio of internal combustion engines of motor vehicles in the case of varying fuel quality in an internal combustion engine having a combustion chamber for burning the fuel. The device has an apparatus for determining the knock resistance property of the fuel, an apparatus for sensing the operating state of the internal combustion engine, a water tank, and a feeding apparatus for the water. In the method, the knock resistance property of the fuel is determined and the operating state of the internal combustion engine is sensed. A need for a feed of water to the fuel is determined therefrom.

Abstract: A valve train for an engine of a motor vehicle and an engine assembly with such a valve train is provided. The valve train includes at least two inlet and/or outlet valves, and at least two motorized actuating units configured to independently control the maximum valve lifts of respective ones of the valves. A first actuating unit of the at least two actuating units is associated with a first valve of the at least two valves, and a second actuating unit is associated with a second valve of the at least two valves.

Abstract: An RFID handheld device is connected at an antenna input to an RFID reading apparatus for the stationary installation at a reading zone, said RFID handheld device having a trigger switch as well as a first antenna and an antenna connector connected to the first antenna so that an RFID signal received by the RFID handheld device, but not evaluated there, can be supplied to the receiver via the antenna input. On actuating a trigger switch at the RFID handheld devices, a trigger signal can be transmitted to the evaluation unit which then carries out a reading procedure via the first antenna.

Abstract: An internal-combustion engine can be operated in a homogeneous charge compression ignition mode at least under certain operating conditions. The combustion mixture present in the combustion chamber reaches auto-ignition conditions and ignites itself. The internal-combustion engine includes a triggering unit for triggering the auto-ignition during the homogeneous charge compression ignition mode before the auto-ignition conditions have been reached. The triggering unit is constructed as a corona ignition system and can be operated for triggering the auto-ignition during the homogeneous charge compression ignition mode, particularly by generating a non-thermal plasma.

Abstract: A surgical lamp includes a light source, a camera, at least one rotatable polarization filter, and a control device that controls the polarization filter according to the results of an evaluation of the image which is captured by the camera.

Abstract: An internal-combustion engine can be operated in a homogeneous charge compression ignition mode at least under certain operating conditions. The combustion mixture present in the combustion chamber reaches auto-ignition conditions and ignites itself. The internal-combustion engine includes a triggering unit for triggering the auto-ignition during the homogeneous charge compression ignition mode before the auto-ignition conditions have been reached. The triggering unit is constructed as a corona ignition system and can be operated for triggering the auto-ignition during the homogeneous charge compression ignition mode, particularly by generating a non-thermal plasma.

Abstract: A surgical lamp includes a light source, a camera, at least one rotatable polarization filter, and a control device that controls the polarization filter according to the results of an evaluation of the image which is captured by the camera.

Abstract: The invention relates to a data transmission method in which the data to be transmitted are divided into a plurality of subchannels each with a normal component and a quadrature component that is orthogonal to the normal component. The divided data are transmitted in different frequency bands. The frequency bands are arranged with non-equidistant frequency spacings between one another. An error signal is generated at the reception end for each subchannel both for the normal branch and for the quadrature branch and fed to a corresponding reception filter.

Abstract: A clock has at least one display unit for the real time, at least one input unit for at least one adjustable set-time, if necessary linked to a date, that can be stored in a memory and that triggers a process when it is attained, as well as at least one display unit for the set-time(s). The input unit has at least three main input means. Each main input means allows a moment in time located in the future with respect to the time presently displayed in the set-time display unit to be reached, starting from the real time or from an adjusted set-time that has been programmed immediately beforehand with the same or another main input means. Said future moment in time represents an integral multiple or an integral fraction of an hour and/or the beginning of an explicitly named set period in time adapted to our natural time perception conditioned by culture and tradition.