FAW Hongqi announced today a technological breakthrough in its 1.5TD hybrid-dedicated engine, introducing new cylinder head integrated intake and separated exhaust supercharging technologies that break traditional engineering bottlenecks.
Conventional engine intake systems, consisting of a plenum, intake manifold, and intake port, often suffer from long intake paths, high resistance, and increased air temperature. To address this, Hongqi has developed a cylinder head with an integrated intake system. By optimizing the cylinder head design, the intake path is shortened, integrating the plenum and intake port directly with the head. This innovation reduces intake resistance and temperature, cutting pumping losses by 15% and lowering fuel consumption by 1.5% under typical driving conditions, while also making the engine structure more compact.
The new separated exhaust supercharging technology re-routes the exhaust from a single cylinder’s two exhaust valves into separate bypass and supercharging paths. Through transient exhaust flow simulation, optimized cylinder head exhaust port separation, and recalibrated exhaust cam profiles, this system achieves efficient exhaust stream separation. This lowers exhaust pressure and temperature, reduces residual exhaust gas in the cylinder, and boosts the overall efficiency of the supercharging system by 10%. The result is a 15% reduction in pumping losses and a further 2% decrease in fuel consumption in real-world use.
According to FAW Hongqi, these innovations represent an industry-first and a pioneering case of engine structural optimization in the domestic market.