High Quality Content by WIKIPEDIA articles! The Mercedes-Benz DiesOtto is an experimental automobile engine that “is said to incorporate the benefits of a diesel engine, but runs on regular old unleaded.” Its name is a portmanteau of Diesel and Otto, referring to the Diesel engine, first introduced by German engineer Rudolf Diesel, and the Otto cycle, as a reference to Nicolaus Otto (even though the invention of the gasoline engine is variously attributed to both Nicolaus Otto and Alphonse Beau de Rochas). The concept engine has an in-line, four-cylinder configuration and displaces 1.8 litres. Its peak power is no less than 175 kW (235 hp), making its specific output 97 kW/L (130 hp/L), and its peak torque is 400 N•m, making its specific torque 220 N•m/L. Mercedes-Benz do not specify the RPM at which these specified maxima are reached. The DiesOtto features the following: HCCI (Heterogeneous Charge Compression Ignition); variable valve timing; twin variable geometry turbocharging; variable compression ratio; direct fuel injection.

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