FAW Completes China's Guo 7 Emission Standards Research Three Years Early

Chinese automaker FAW has announced the successful completion and acceptance of its research project focused on system-level technology for hybrid gasoline engines designed to meet China's upcoming Guo 7 emission standards. The company states this achievement was realized three years ahead of the anticipated deadline.

The project's outcomes encompass core technical domains including combustion, electronic control, and exhaust aftertreatment. FAW asserts that this has resulted in a fully self-developed and controllable capability across the entire emissions purification chain, from in-cylinder combustion to exhaust treatment. These proprietary technologies are slated for implementation in hybrid and energy-efficient models under FAW's Hongqi brand.

Key technological advancements include improvements in "in-cylinder purification" designed to curb particulate matter generation through high-pressure fuel injection (500 bar) and precise control of the combustion process, meeting anticipated Guo 7 particle number limits. Additionally, a Gasoline Particulate Filter (GPF) system has been developed, claiming high capture efficiency (≥85% for 10nm particles) and low backpressure. Innovations also extend to lightweight Three-Way Catalyst (TWC) carriers to shorten light-off times and enhance cold-start emissions performance, alongside strategies to decouple exhaust energy and pollutant formation.

FAW highlights that these technological developments aim to balance emissions reduction with vehicle economy and driving performance. Particular focus was placed on optimizing cold-start emissions and improving system smoothness through technologies like electrically heated aftertreatment components, reducing catalyst light-off delays and associated noise and vibration.