Obrist ZVG: The Two-Cylinder Engine With Virtually Zero Vibration And Noise

What is the “black magic” that turns a two-cylinder engine into a super-smooth one? The big secret is the use of two crankshafts that rotate in opposite directions, which eliminates primary vibrations.

The Obrist HyperHybrid is a modified Tesla Model 3 that combines an electric drivetrain with a compact, cheap, and efficient thermoelectric generator. The HyperHybrid's two-cylinder engine is very compact (688mm x 503mm x 269mm) and weighs 129kg (including inverter and controller). The battery is made of cylindrical cells (18650 format) and weighs 97.6kg (197Wh/kg at module level). Combined with the two (already with the fluids needed to run the engine and other peripherals), Obrist says it weighs around 250kg.

This naturally aspirated two-cylinder engine delivers 45 kW (61 hp) at 5,000 rpm. However, if we replace the gasoline with synthetic methanol (e-methanol) – another Obrist project – the output increases slightly, to 50 kW (68 hp).

The two-cylinder engine is mounted up front instead of the frunk. The battery in its place is a smaller unit, from the Oberst itself, with just 17.3 kWh (air-cooled, liquid-cooled optionally).

With the ZVG on, the autonomy “stretches” to almost 1,000 km. This translates into a real consumption, says Obrist, of 2.0 l/100 km, which can only be justified by the high efficiency of this naturally aspirated two-cylinder, 999 cm3 car.

The Austrian company claims a thermal efficiency of 45%, which is great for a four-stroke gasoline engine, and on par with many diesel engines. This high efficiency can be partly justified by the fact that it operates only as a generator. This means that it will operate mainly under stable systems, and can therefore be optimized in this sense.

The above is the detailed content of Obrist ZVG: The Two-Cylinder Engine With Virtually Zero Vibration And Noise. For more information, please follow other related articles on the PHP Chinese website!