April 8th - Breaking News: GAC Research Institute has officially announced a significant breakthrough in the thermal efficiency of GAC Motor engines. The indicated thermal efficiency of single-cylinder engines has surpassed 52.5%, while the effective thermal efficiency of multi-cylinder engines, suitable for vehicle integration, exceeds 46%. This advancement in technology places GAC Motor at the forefront of the global automotive industry.
Officially, it's claimed that only through the adoption of lean combustion technology can a significant increase in the variability index of in-cylinder working substance be achieved, breaking through the 45% effective thermal efficiency limit of the engine. The fundamental reason why the effective thermal efficiency of the engine has remained below 45% for many years is the non-adoption of lean combustion technology.
Lean combustion refers to a combustion mode that uses excess air for dilution. The difficulty lies in the fact that excessive dilution with air will decrease the concentration of reactants in the mixture inside the cylinder, leading to a slowdown in combustion rate and a decrease in combustion volume. Moreover, due to the increase in the quenching distance, unburned losses will further increase.
To address this technical challenge, the self-developed team of Guangqi Powertrain, based on the Guangqi GCCS combustion control patented technology, finely optimized the in-cylinder combustion process. They combined it with turbulent jet ignition technology to enhance ignition energy, ensuring reliable ignition of lean mixtures and stable flame propagation, thus achieving a profound optimization of the combustion process.
Ultimately, a single-cylinder engine achieved an indicated thermal efficiency of over 52.5%, and multi-cylinder engines capable of powering entire vehicles achieved an effective thermal efficiency of over 46%, moving steadily towards a sustained 50% effective thermal efficiency.
Guangzhou Automobile Group Research Institute Optical Single Cylinder Test Bench
