Autoren

Roscoe Sellers, Dr. Richard Osborne, Ricardo UK Ltd., Shoreham-By-Sea;
Wenyuan Cai, Yirong Wang, Zhejiang Geely New Energy Commercial Vehicle Group Co. Ltd., Hangzhou, China

Zusammenfassung

The ongoing electrification of powertrains provides an opportunity to alter the way that engines are designed in order to boost efficiency and reduce emissions. Ricardo have realised this in the form of the Magma xEV concept and have worked with Geely to evaluate an advanced combustion system for series-hybrid application. The goal is 45 % Brake Thermal Efficiency (BTE), and through a series of  technology evaluations this has been demonstrated on a single-cylinder engine. The key enablers are very high compression ratio combined with long stroke and Miller intake cam timing, together with knock mitigation measures. Delivering this required a careful design approach and simulation including combustion analysis before validating the results using a structured single-cylinder engine test programme.

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