Development of a Pre-Chamber Combustion System for the Magma xEV Engine
2022-01-0508
03/29/2022
- Content
- The electrification of powertrains provides a critical opportunity to change the way that engines are designed and developed, allowing their efficiency to be increased and their cost reduced. This paper draws on ongoing Ricardo projects in the field of dedicated hybrid engines (DHEs). The Magma xEV combustion concept employs very high compression ratio, long stroke architecture, and advanced ignition and knock mitigation technologies, for DHEs requiring the highest efficiency. In the latest research project a pre-chamber combustion system (with both active and passive operation) has been applied to the Magma xEV engine, in order to enable the highest levels of charge dilution and further increase brake thermal efficiency. The research focussed on benefits of pre-chamber ignition as compared to spark ignition and corona discharge ignition. The benefits of charge dilution using lean operation and EGR as compared to stoichiometric are also presented. A route to brake thermal efficiency beyond 45% is discussed. The combustion concept has been developed using virtual product development approaches and validated with a single-cylinder research engine.
- Citation
- Saroop, A., Osborne, R., Stokes, J., Valenta, L. et al., "Development of a Pre-Chamber Combustion System for the Magma xEV Engine," SAE Technical Paper 2022-01-0508, 2022, .