How Tire Types Influence PHEV Braking Performance
- Weight and Load Considerations:
PHEVs are heavier than conventional vehicles because they carry both an internal combustion engine and an electric battery system. This increased weight demands tires capable of supporting the load while maintaining proper grip. Tires with appropriate compounds and construction are necessary to wear well and maintain braking efficiency under this extra stress. - Regenerative Braking Impact:
PHEVs rely on regenerative braking, which recaptures kinetic energy to recharge the battery. This braking system applies resistance primarily through the wheels (front or rear, depending on drivetrain), affecting tire wear differently than traditional friction brakes. The extra stress from regenerative braking means PHEV tires need to be specially designed to handle this unique wear pattern, which also influences braking performance. - Tire Compound and Design:
Tires engineered specifically for EVs and PHEVs (sometimes called “EV ready tires”) aim to optimize rolling resistance, grip, and noise while supporting higher loads from heavier vehicles. For example, tires like the Michelin Pilot Sport EV or Hankook Ventus S1 eco 3 EV balance durability, grip, and efficiency, all factors contributing to braking performance. - Trade-offs Between Fuel Economy and Braking:
Studies show that some hybrids and PHEVs may be equipped with tires optimized for fuel economy at the expense of grip, resulting in longer braking distances compared to conventional versions of the same model. Consumer Reports testing found that hybrids had 8 to 12 feet longer dry braking distances than their gas-only counterparts, partly due to tire choice. Swapping tires between hybrid and conventional models changed braking distances, confirming tires’ influence. Tires with improved grip can shorten braking distance, even if it slightly reduces fuel economy.
Summary
- Different tire types materially affect PHEV braking performance due to the vehicle’s weight, regenerative braking system, and tire compound/design.
- Tires designed specifically for EVs/PHEVs help mitigate extra wear, maintain grip, and balance the braking demands unique to these vehicles.
- Choosing tires optimized mostly for fuel efficiency at the expense of grip can increase braking distances, which affects safety.
- Therefore, selecting the right tires that support the vehicle’s weight and regenerative braking system while maintaining adequate grip is essential for optimal braking performance in PHEVs.
In essence, tire type is a critical factor influencing PHEV braking performance, impacting both stopping distance and tire longevity under the distinct operating conditions of these vehicles.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/do-different-tire-types-affect-the-braking-performance-of-phevs/
