Exhaust heat recovery system

[1] A second technology, thermoelectric generators (Seebeck-, Peltier-, Thomson effects) is also an option to recover heat from the exhaust pipe, but has not been put to practical use in modern cars.

[4] Honda also develops a module based on a Rankine Cycle to improve overall efficiency of hybrid vehicles, by recovering the heat of the engine and turning it into electricity for the battery pack.

A French company, Exoès is specialized in designing and manufacturing exhaust heat recovery systems based on Rankine Cycles.

This system mechanically adds power back to the drive-line, utilizing a Rankine engine as the energy conversion method.

[9] IFPEN, Enogia and Alstom are developing a system called Trenergy dedicated to improve train fuel efficiency.

Automobile sport is also a good place to trial and assess technologies that, once made reliable, and with costs reduced by experience in production, can be adapted to private cars.

Formula 1 constructors produced one of the first exhaust heat recovery systems,[citation needed] and nowadays these devices are essential parts of embedded technologies on F1.