Porsche is further refining its advanced T-Hybrid twin-turbo system with a newly patented method to actively balance airflow and eliminate subtle performance inconsistencies by leveraging the electric motors integrated into its turbochargers.
This innovation addresses a previously unaddressed issue in parallel twin-turbo setups: unequal airflow between cylinder banks. Such an imbalance can lead to momentary power loss or uneven torque delivery.
The problem arises from factors like intake valve pulses and temperature variations, which disrupt air pressure. In extreme cases, this can cause “flow stall,” where hot air reverses direction, risking catastrophic damage to turbos, intake components, and the engine.
While “flow stall” is rare in modern engines, Porsche engineers are moving to mitigate even this minimal risk. Their proactive approach underscores a commitment to peak performance and durability.
The T-Hybrid system, which debuted in the new 911 GTS and is featured in the 701-horsepower 992.2 Turbo S, already uses electric motors within the turbos. These motors eliminate turbo lag by instantly spooling the compressors to maximum speed.
The new patent leverages this existing T-Hybrid architecture. When the engine’s management system detects a pressure drop via the mass air flow (MAF) sensor, it cross-references the speeds of the individual turbos.
If one or both turbos are slowing due to reverse pressure, their integrated electric motors instantly accelerate them. This action re-establishes balanced airflow and stable intake pressure across both cylinder banks.
This dynamic correction ensures perfectly continuous torque delivery, with each turbo capable of independent self-adjustment. The image above shows a compact and meticulously organized six-cylinder boxer engine featuring two integrated electric turbochargers, characteristic of Porsche’s engineering.
The patent, discovered by CarBuzz and filed with the German Patent and Trade Mark Office, illustrates a six-cylinder engine. However, the technology is scalable for any parallel twin-turbo setup feeding multiple cylinder banks through a common intake manifold.