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This paper discusses a new kind of diesel engine with tumble charge motion, pent-roof combustion chamber and piston with pot recess. At the Robert Bosch GmbH, a conventional single-cylinder test engine and an identical optical access engine were built up to study this new engine concept. In this paper, a first attempt to run homogeneous diesel combustion on this engine is presented. A strategy consisting of three operating points with two to four injections was used. These operating points were first run on the conventional test engine and after that studied on the optical access engine with the same boundary conditions. The information of the image data of the optical access engine was then related to the emission results of the conventional test engine.