Horse Powertrain has unveiled a new hybrid engine prototype promising unprecedented fuel efficiency: up to 71 miles per gallon in combined driving conditions. The engine, dubbed the H12 Concept, is designed to run entirely on renewable fuels and represents a significant step towards reducing emissions from internal combustion engines.
Key Innovations Drive Efficiency
The H12 Concept achieves its high efficiency through a combination of advanced technologies. These include:
- A high 17:1 compression ratio, maximizing the energy extracted from each combustion cycle.
- A next-generation Exhaust Gas Recirculation (EGR) system, reducing pumping losses and lowering combustion temperatures for improved efficiency.
- An optimized turbocharger, boosting power while minimizing fuel consumption.
- A high-energy ignition system, ensuring complete and efficient combustion.
- An improved hybrid gearbox that reduces internal friction and improves energy management.
Performance Validation & Real-World Testing
Horse Powertrain claims the H12 Concept achieves a peak brake thermal efficiency of 44.2 percent. The engine, an evolved version of their HR12, has already been validated in two prototypes, developed in collaboration with energy company Repsol. Testing was based on the Worldwide Harmonised Light Vehicles Test Procedure (WLTP), a European standard for fuel efficiency measurements.
The company expects the first vehicle equipped with this powertrain to be ready in early 2024.
“The Horse H12 Concept is an example of how highly efficient engines and renewable fuels can reduce emissions today, without waiting for future solutions,” says Patrice Haettel, Horse Powertrain’s chief operating officer.
Combustion Engines Still Have A Future
This development comes at a time when the automotive industry is shifting towards electric vehicles. However, Horse Powertrain’s work highlights that combustion engines still have a role to play in reducing emissions. The company is not alone in this pursuit: General Motors is also investing heavily in next-generation V8 engines.
The H12 Concept demonstrates that continued innovation in combustion engine technology can deliver significant gains in fuel efficiency and sustainability. It offers a viable path to reducing emissions in the short term while the transition to fully electric mobility continues.
