Abstract: A joining device and method for laser-based joining of two components includes a first laser radiation source, a first radiation guide connected to the first radiation source to couple first laser radiation into the first radiation guide, a second laser radiation source, at least one second radiation guide connected to the second radiation source to couple second laser radiation into the second radiation guide, and a focusing device coupled to the laser radiations and focusing them at a distance from each other into a joining zone of the components. To reduce installation effort, the focusing device focuses the first and second laser radiations through a common beam path and a coupling device is connected on its input side to the first and second radiation guides and on its output side to the focusing device. The coupling device couples the first and second laser radiations into the common beam path.

Abstract: When fuel is injected into a combustion chamber (2) of a cylinder (13) of an engine (30) of a vehicle (10), the fuel is injected in the form of multiple jets (3) with the aid of an injector (1). In this connection, a first plane is defined in which both the central axis (11) of the injector (1) and the central axis (12) of the cylinder (13) lie. Furthermore, a second plane is defined in which both the central axis (11) of the injector (1) and the surface normal of the first plane lie. The jets (3) are generated in such a way that for each jet pair, which is formed from two of the jets (3), an angle between the projections of the two central axes of the two jets of the jet pair into the second plane is smaller than 50°.