Fremd gezündeter (SI) Einzylinder-Motor (SCE)

The internal combustion engine (ICE) is still crucial in the field of mobility due to its high efficiency, durability, high power density, and reliability. Nevertheless, the ICE is currently facing considerable challenges. For sustainable long-term operation of ICE, it is mandatory to further reduce engine-out emissions and increase engine efficiency.

One viable option for gasoline engines is the usage of a combination of solutions like downsizing (reduction of the engine size), direct fuel injection technology and turbocharging. Unfortunately, this approach has drawbacks at high load operation due to an abnormal combustion (knock, pre-ignition or “mega-Knock”). The objective of this study is to investigate the influence of charge motion and cooled EGR on the abnormal combustion.

A single-cylinder research engine (SCE) with direct injection (DI) is adopted for the investigations.

The relevant engine and injector parameters are listed in Table 1.