Hitting combustion research is crucially important because it determines engine durability, fuel consumption and power density, as well as noise and emissions performance. The current spark ignition (SI) engines suffer from both conventional and super-punch blows. Conventional blow limits that increase the compression ratio to improve thermal efficiency due to the final gas self-ignition, while super-knock limits the desired boost to improve the power density of modern gasoline engines due to detonation . Conventional combustion has been extensively studied for many years. Although the basic features are clear, the correlation between blow index and fuel chemistry, pressure swing and heat transfer, and propagation of the autoignition front, are still in the early stages of understanding. Knocking combustion in high-power spark ignition engines with random prelaunch events has been intensively studied in the last decade in both academia and industry.
The super-knock mechanism has recently been developed in fast compression machines (RCM) under motor-type conditions. It was found that detonation can occur in modern internal combustion engines under conditions of high energy density. The thermodynamic conditions and the shock waves influence the combustion wave and the modes of initiation of the detonation. Three combustion waveforms in the final gas have been displayed as deflagration, self-start and sequential detonation. The mode of initiation of the detonation most frequently observed is the shock-induced detonation of the shock wave (SWRID). Compared to the effect of shock compression and combustion of the negative temperature coefficient (NTC) on the ignition delay, the reflection of the shock wave is the main cause of the auto-ignition / detonation near the wall. Finally, the methods of suppression of conventional knocking and super-shock engines in SI engines, including the use of exhaust gas recirculation (EGR), the injection strategy and the integration of an EGR-Atkinson cycle / Miller high and high.