MCE-5 VCRi deploys topology optimization for its extraordinary piston rack. MCE‑5 VCRi is aadvanced internal combution engine, with variable displacement, advertised to produce very imprssive 420 Nm and 160 kW (220 hp) from a 1.5 L 2-stage turbo engine. The piston racks have the characteristic unusual shape of all topology optimized structures.
Piston racks were stated to be lightened from 1400 to 900 grams
The manufacturing processes used to produce the racks are also impressive, Near-Netshape forging and electrochemical machining are used to produce parts at ± 2 microns accuracy in close to 1 minute.