Peugeot Sport has revealed powertrain details of their hybrid Le Mans Hypercar that they will use when they enter the World Endurance Championship in 2022.
The powertrain, respectively named the Peugeot Hybrid4 500 KW, will feature a hybridisation of an internal combustion engine and an electric motor unit.
It will be a mid-mounted, 2.6L twin-turbo (90-degree, 165kg) V6 petrol that will send power to the rear wheels, producing a 300 kW or 408 hp.
The combined-output of the powertrain will be 500 kW or 680 hp. It can increase to 700 hp when the battery is depleted at the end of straights, so the electric motor subconsciously performs as a 15 kW alternator.
François Coudrain, PEUGEOT Sport’s WEC Program Powertrain Director, said: “The architecture of the PEUGEOT HYBRID4 500kW powertrain is the result of a highly-detailed brief shaped by the new FIA WEC regulations.
“We initially considered a single turbo, but that would have prevented us from achieving our engine’s centre of gravity target.
“A twin-turbo V6 block offers the best trade-off between technology, weight, packaging of the engine’s ancillaries, reliability and performance.”
To the front wheels, 200 kW/268 hp will be produced by a front-mounted electric motor generator unit developed in collaboration of Total Saft and Peugeot Sport.
Coudrain added: “The motor generator unit will be equipped with a lightweight, high-efficiency single-speed transmission and a latest-generation inverter to transfer battery power to the motor.
“It will have the capacity to use all the energy available in the battery instantly thanks to the powertrain’s energy management system strategies.”
The Peugeot LMH will use a seven-speed (paddle-shift) sequential transmission to accommodate the four-wheel drive drivetrain (RWD by default when electric motor not in use).
The battery will be re-charged by the car’s Kinetic Energy Recovery System and brake-by-wire system.
Prior to each race, the battery will be charged via a mains plug-in socket but the KERS will operate independently out on-track.
“PSA Motorsport’s experience of the WRC and Formula E will contribute to the development of the software employed to manage the computer and energy systems [braking energy recovery, power under acceleration, anti-lag system, reduced fuel-consumption].”
As per the regulations, it will be required that the car reaches 120 kph before the electrical energy is deployed so the car will pull away from standstill on the V6 twin-turbo alone.
However, the regulations allow the car to run with either the combustion or the electric motor, or both in synchronous, in the pitlane or when speed is restricted to 60 kph.
Their track-testing programme will commence at the end of 2021, ahead of a debut to the FIA WEC in 2022 and Season 10.