Introduction
Many automakers claim that their cars are race-inspired, but few can back it up. However, Porsche has developed a new hybrid 911 that is genuinely race-bred. The new T-Hybrid system in the 911 Carrera GTS is a result of engineers facing the challenge of reducing fuel consumption while maintaining performance, similar to what racing teams dealt with a decade ago with fuel flow regulations. This system, featuring a 3.6-liter flat-six engine, an electric motor attached directly to the crankshaft, and an electric turbocharger, draws inspiration from Porsche’s successful motorsport endeavors, including Formula 1 and the 919 LMP1 car.
Developing the T-Hybrid System
The development of the T-Hybrid system aimed to optimize the air-fuel ratio and reduce fuel consumption while ensuring optimal performance. This system allows the engine to run at Lambda = 1, similar to lean-combustion engines used in motorsport. The implementation of the system, which includes an electric turbocharger and motor generators, draws on Porsche’s expertise in lean-combustion engine technology.
The Electric Turbocharger
The 911 GTS features an electric turbocharger that enhances thermal efficiency by recovering energy that would otherwise be lost to heat. This turbocharger, with an independent power inverter, can recover energy during braking, providing additional power to the battery or the motor between the engine and gearbox. The design and placement of the turbocharger optimize performance and minimize lag, making it a significant advancement in turbocharging technology.
The Engine and Motor Integration
The new 3.6-liter flat-six engine in the 911 GTS incorporates innovative features, such as a finger-follower valve train and variable valve timing. The integration of a motor between the engine and transmission eliminates the need for a traditional alternator and belts, reducing weight and improving engine efficiency. The motor assists in compensating for turbo lag and provides a more linear power delivery, enhancing the overall driving experience.
Hybrid System Performance
The T-Hybrid system in the 911 GTS seamlessly integrates the engine, electric turbocharger, and motor to respond to driver torque requests. In Sport Plus mode, the system optimizes performance by adjusting the turbo and motor activities based on driving conditions. The complex hardware and software work together to provide a smooth and efficient driving experience, influenced by Porsche’s motorsport heritage.
Conclusion
The development of Porsche’s new T-Hybrid system in the 911 Carrera GTS showcases a blend of racing technology and road car performance. By integrating innovative technologies like an electric turbocharger and motor generators, Porsche has created a system that enhances performance while reducing fuel consumption. This system draws on the company’s experience in motorsport, providing a unique driving experience that reflects Porsche’s commitment to engineering excellence. The T-Hybrid system represents a significant advancement in hybrid technology, merging race-inspired elements with everyday driving practicality.