Introduction to INDYCAR’s Hybrid Power Unit
INDYCAR racing is revving up for a new era. The 2024 season marks the debut of a 2.2-liter twin-turbocharged V-6 engine enhanced with hybrid technology. This innovative power unit promises to amplify the already intense competition on the track.
The Hybrid System
Developed in collaboration with Chevrolet and Honda, the hybrid system is comprised of the Motor Generator Unit (MGU) and Energy Storage System (ESS). These components are housed within the bellhousing, situated between the combustion engine and the gearbox. The system uses multiple strategies to regenerate and deploy energy through the MGU before storing it in the supercapacitor ESS, which is responsible for capturing wasted energy.
This diagram illustrates the architecture of the new hybrid system.
This animation shows the hybrid system components working cohesively.
Enhanced Racing Dynamics
The hybrid power unit will offer drivers expanded control through increased horsepower and enhanced overtake options, often referred to as “push-to-pass.” Unlike the traditional system, there will be no time restrictions on the use of the hybrid’s boost function during races.
Project Timeline
Initial testing of the hybrid power unit began in October 2022. The combustion engine was first tested with the hybrid unit on August 16, 2023, at Sebring International Raceway, with drivers Scott Dixon (Honda) and Will Power (Chevrolet). Further testing was conducted on ovals, road courses, and street circuits across the US.
Noteworthy Features
The hybrid unit will contribute additional horsepower, increasing the combined output of INDYCAR SERIES race cars to approximately 900 horsepower. The new engine package is designed with safety in mind. The 48V hybrid component allows drivers to restart the car without relying on external starters, and enhances the sport’s sustainability efforts with the use of renewable fuel and tires.
Key Benefits
- Increased Horsepower: Combined output of nearly 900 horsepower
- Driver Control: Expanded “push-to-pass” options with no time limitations.
- Safety: The hybrid component is low voltage, and drivers may restart the car from the cockpit.
- Sustainability: This is part of a broader campaign also with a focus on renewable fuel and alternative tires. The new hybrid power unit is a significant step for INDYCAR, paving the way for more electrifying races.
