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Bosch hybrid system for motorsports debuts at Rolex 24 At Daytona

Vehicle featuring new LMDh system wins 24-hour race

  • Bosch LMDh hybrid system endures 24-hour event at inaugural race featuring new GTP class
  • GTP class featuring LMDh technology takes top six spots in Rolex 24 At Daytona
  • Bosch provides system engineering as well as electric motor, inverter, hybrid control unit and electric braking system for new LMDh technology
  • LMDh ushers in new era for endurance racing
Cornelia Dürr

Cornelia Dürr >

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Cornelia Dürr

Cornelia Dürr
Spokesperson for Bosch Engineering GmbH, motorsports

Abstatt, Farmington Hills – At the 61st edition of the 24-hour race of the IMSA WeatherTech SportsCar Championship "Rolex 24 At Daytona" (USA), the new Le Mans Daytona Hybrid vehicles (LMDh) made their successful competitive debut. The new Grand Touring Prototype (GTP) class raced competitively for the first time during the Rolex 24 At Daytona, replacing the Daytona Prototype international (DPi.) Under an agreement between International Motor Sports Association (IMSA), the Automobile Club de l’Ouest (ACO) and the Federation Internationale de l’Automobile (FIA), new standards have been established that enable the use of hybrid technology. The LMDh system features high-cost efficiency thanks to standardized parts, enabling vehicle manufacturers and teams to compete under attractive conditions at endurance classics such as Le Mans, Daytona, Sebring or Spa-Francorchamps.

Despite the dynamic development time, all nine hybrid bolides from the manufacturers Acura, BMW, Cadillac and Porsche started, of which eight reached the finish line – a great success for manufacturers and teams, but also for Bosch Motorsport. The No. 60 Acura ARX-06 from Meyer Shank Racing won the GTP class and was the overall Rolex 24 winner across all vehicle classes. Additionally, the top six finishers in the Rolex 24 At Daytona event were from the GTP class featuring the new LMDh hybrid technology.

Bosch is the official systems engineering lead for the hybrid system. Additionally, Bosch is the exclusive supplier for the electric motor (MGU), the inverter (MCU) and the hybrid control unit (HCU) as well as the electric braking system (EBS) that is also capable of recuperation. The hybrid system is flexible and can be combined with different vehicle and engine concepts, while still offering a high level of performance. In drive mode, it delivers a permanent output of 50 kW, and up to 200 kW in recuperation mode. "The race in Daytona was extremely important to see where we stand under real racing conditions. Overall, we are very pleased with the first debut of our technology, which proved itself right away in the 24-hour endurance test at one of the most important races of the season. We are happy for the manufacturers and teams with the successful race debut," says Ingo Mauel, Head of Bosch Motorsport.

The electric braking system (EBS) from Bosch Motorsport also withstood the high stresses of the first endurance race. It uses brake-by-wire technology, in which the electronics take care of transmitting the braking signal. When the driver presses the brake pedal, the electronic control unit is activated, the electric motor reverses, and the vehicle's kinetic energy is converted into electrical energy and fed back into the battery. When hybrid technology is fully optimized, braking energy is recovered that would otherwise be lost to heat, so the driver can race dynamically with less fuel. "In the coming weeks until the race at Sebring, we have a lot to do. We have already learned a lot in the first race and will analyze further evaluations and data together with technology partners, teams and the series to move forward," says Mauel.

Further information:

https://www.bosch-motorsport.com/

https://www.youtube.com/watch?v=bl3Cw6T8q-o&list=PL192VO-BZ56KWsDcCw2Intr5F-x50B2FV

https://www.youtube.com/watch?v=Ud_5ZmnVKAA

Mobility is the largest Bosch Group business sector. In 2023, its sales came to 56.2 billion euros, or just under 60 percent of total Group sales. This makes the Bosch Group one of the leading mobility suppliers. Bosch Mobility pursues a vision of mobility that is safe, sustainable, and exciting. For its customers, the outcome is integrated mobility solutions. The business sector’s main areas of activity are electrification, software and services, semiconductors and sensors, vehicle computers, advanced driver assistance systems, systems for vehicle dynamics control, repair-shop concepts, as well as technology and services for the automotive aftermarket. Bosch is synonymous with important automotive innovations, such as electronic engine management, the ESP anti-skid system, and common-rail diesel technology.

Bosch Engineering GmbH is a wholly owned subsidiary of Robert Bosch GmbH and is head-quartered in Abstatt, Germany. As a systems development partner to the automotive industry since 1999, the company with its more than 3,000 associates offers development services for powertrains, safety and convenience systems, and electrical and electronic systems – from the original concept to series production. Specialized in electronics and software, it draws on Bosch’s proven large-scale series production technology to develop tailored solutions for a wide variety of applications in passenger cars, commercial vehicles, off-highway and recreational vehicles, and in rail applications, ships, and industry. Bosch Engineering GmbH also coordinates all the Bosch Group’s motorsports activities.

Additional information can be accessed at www.bosch-engineering.com.

The Bosch Group is a leading global supplier of technology and services. It employs roughly 429,000 associates worldwide (as of December 31, 2023). The company generated sales of 91.6 billion euros in 2023. Its operations are divided into four business sectors: Mobility, Industrial Technology, Consumer Goods, and Energy and Building Technology. With its business activities, the company aims to use technology to help shape universal trends such as automation, electrification, digitalization, connectivity, and an orientation to sustainability. In this context, Bosch’s broad diversification across regions and industries strengthens its innovativeness and robustness. Bosch uses its proven expertise in sensor technology, software, and services to offer customers cross-domain solutions from a single source. It also applies its expertise in connectivity and artificial intelligence in order to develop and manufacture user-friendly, sustainable products. With technology that is “Invented for life,” Bosch wants to help improve quality of life and conserve natural resources. The Bosch Group comprises Robert Bosch GmbH and its roughly 470 subsidiary and regional companies in over 60 countries. Including sales and service partners, Bosch’s global manufacturing, engineering, and sales network covers nearly every country in the world. Bosch’s innovative strength is key to the company’s further development. At 136 locations across the globe, Bosch employs some 90,000 associates in research and development, of which nearly 48,000 are software engineers.

Additional information is available online at www.bosch.com, www.iot.bosch.com, www.bosch-press.com.

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