Abstract: The disclosure provides methods of additive manufacture of components in layers in a powder bed by at least two laser beams that can be deflected two-dimensionally over the same powder bed region. Each laser focal spot is projected onto the power bed and is or is set to a diameter of less than or equal to 300 ?m. Components to be produced in the powder bed region are manufactured by each of the laser beams, and each individual surface contour of the component is manufactured solely by one of the laser beams.

Abstract: A method for operating a self-propelled cleaning device is proposed, wherein the cleaning device comprises a preferably hinged cover and a distance meter for measuring the distance of the cleaning device from objects in its environment. According to the invention, the distance meter is used to detect an open position of the cover.

Abstract: An internal combustion engine with at least one camshaft and a bearing block for rotationally bearing the camshaft about a rotational axis, an axial bearing element being provided for axially bearing the camshaft, the element engaging with an axial bearing groove of the bearing block. The axial bearing element has a support body resting on an outer peripheral surface of the camshaft, and a retaining projection protruding from the support body, the projection engaging with a retaining recess passing through the outer peripheral surface, so that the axial bearing element is rotationally fixedly to the camshaft, the support body engaging with the peripheral axial bearing groove of the bearing block in the peripheral direction with respect to the rotational axis.

Abstract: An internal combustion engine with at least one camshaft and a bearing block for rotationally bearing the camshaft about a rotational axis, an axial bearing element being provided for axially bearing the camshaft, the element engaging with an axial bearing groove of the bearing block. The axial bearing element has a support body resting on an outer peripheral surface of the camshaft, and a retaining projection protruding from the support body, the projection engaging with a retaining recess passing through the outer peripheral surface, so that the axial bearing element is rotationally fixedly to the camshaft, the support body engaging with the peripheral axial bearing groove of the bearing block in the peripheral direction with respect to the rotational axis.

Abstract: An internal combustion engine includes a plurality of cylinders, each of which two intake valves and two exhaust valves, respectively arranged in a valve mount of a cylinder head of the internal combustion engine as well as a coolant distributing chamber and a coolant accumulating chamber being associated to. For each cylinder two coolant ducts are formed in the cylinder head and each is fluidly connected to the corresponding coolant distributing chamber and the corresponding coolant accumulating chamber. A first one of the coolant ducts on a first side extends about a first one of the intake valves and on a second side opposite the first side about a first one of the exhaust valves, and a second one of the coolant ducts extends on the first side about a second one of the intake valves and on the second side about a second one of the exhaust valves.

Abstract: An internal combustion engine includes a plurality of cylinders, each of which two intake valves and two exhaust valves, respectively arranged in a valve mount of a cylinder head of the internal combustion engine as well as a coolant distributing chamber and a coolant accumulating chamber being associated to. For each cylinder two coolant ducts are formed in the cylinder head and each is fluidly connected to the corresponding coolant distributing chamber and the corresponding coolant accumulating chamber. A first one of the coolant ducts on a first side extends about a first one of the intake valves and on a second side opposite the first side about a first one of the exhaust valves, and a second one of the coolant ducts extends on the first side about a second one of the intake valves and on the second side about a second one of the exhaust valves.