AVL has developed window techniques for its well-known single cylinder research engines which allow simultaneous optical access to the combustion chamber through cylinder liner and piston. Over many years AVL has made substantial contributions to combining the needs of both the optical measurement systems and the engine operation requirements.
Full insight into the combustion chamber is provided with standardised components. With the 3D version, three-dimensional measurements inside the combustion chamber are possible due to the optical access through both, the glass cylinder liner and the glass piston crown.
The modular design allows an easy matching of customised cylinder heads to the Optical Top-Works and drive train. On gasoline engines with a pent roof in the cylinder head, a special-shaped glass cylinder enables full optical view into the combustion chamber without disturbances.