When the M178 AMG V8 biturbo engine came out, it was a dramatic improvement over its predecessor. Its features showcase Inventive Principles.
The new engine is 4.0 litres in displacement, compared with its 6.2-liter M156/159 predecessor, a whopping 35% reduction. Principle 35 – Parameter Change
With improvements listed below, the new engine is able to make comparable power while weighing less and taking less room under the hood.
Typical V8 engines draw air from intake manifolds at the centre of the V and exhaust through manifolds on either side. This engine swaps these so that it feeds exhaust into a “hot V” which brings more energy to the centrally located twin turbos. Principle 13 – The Other Way Round
Nanoslide is a proprietary Mercedes-Benz technique that coats cylinder bores with porous iron for reduced friction and better wear resistance. Principle 31 – Porous Materials
The dual overhead cam valve train has variable intake and exhaust timing. Principle 15 – Dynamics
The cams act on finger followers that have rollers to minimize friction. Principle 14 – Spheroidality & Curvature
Lightning strikes 100 times
The engine direct injects fuel five times and fires its spark plugs up to 100 times with each power stroke. Principle 19 – Periodic Action
This new engine shares pistons, rods and injectors with its four cylinder AMG cousin to reduce development costs. Principle 6 – Universality