IndyCar is entering a new era with the introduction of hybrid powertrains. This weekend’s race at Mid-Ohio will mark the debut of the electrified power units, which will work alongside the existing internal combustion engines to deliver over 800 horsepower to the rear wheels. While hybrid power has been seen in other racing series, IndyCar has developed a unique configuration that sets it apart. The road to implementing this system has been long and challenging, with delays and technical issues along the way. However, after extensive testing and collaboration between Honda and Chevy, the hybrid powertrains are ready for action.
The hybrid system in IndyCar follows the same principles as other automotive hybrids, with an electric motor on the driveshaft that can provide power during acceleration and recover energy during braking. What makes IndyCar’s system stand out is its compactness. The electric motor, energy store, and control electronics are all housed within the chassis structure, weighing just over 100 pounds. Another unique aspect is the use of supercapacitors to store energy, rather than traditional batteries or flywheels. These supercapacitors offer quick energy transfer and can withstand many cycles without degradation.
Safety is a top priority for IndyCar, and the hybrid system has been designed to operate at a lower voltage compared to other series. This ensures the safety of drivers, crew, and track workers without the need for additional safety measures. While the hybrid systems are delivered to teams as spec units with no physical adjustments allowed, drivers have some control over regeneration and deployment. Regeneration can be adjusted through a paddle on the steering wheel, while deployment of the extra power boost is done via a dedicated button.
IndyCar has imposed limits on the use of the hybrid system during races to ensure reliability. For the first few race weekends, drivers will have a limited amount of power and deployment time. At Mid-Ohio, they will have 50-60 horsepower available and can deploy the boost for four to five seconds per lap. Once the energy limit is reached, they must wait until the next lap to use the system again. This cautious approach aims to avoid any issues that could affect the outcome of a race.
Overall, the introduction of hybrid powertrains is a significant development for IndyCar. It demonstrates the series’ commitment to road relevance and showcases the technological advancements that can benefit both racing and everyday vehicles. Honda played a crucial role in pushing for the implementation of hybrid systems, emphasizing the importance of this technology for the future. As the season continues, the performance of teams and drivers with the new hybrid powertrains will determine the success of this technical change.
Photo By: Joe Skibinski
