Technologie e-Hdi - Moteur hybride - PSA Peugeot Citroën (in french)

e-HDi micro hybrid technology PSA Peugeot Citroën diesel engine
In cities, vehicles are stopped 30% of the time. Why would you consume fuel then?
The micro hybrid e HDi technology combines a new generation of reversible starter-alternator and an HDi diesel engine. The system is composed of a battery, a condition supervisor, and an e- booster, delivering additional energy.  
The system allows battery to recharge on deceleration and the reversible starter automatically switches the engine into stand by mode from 12 miles per hour in manual gearbox and from 5 miles per hour in automatic gearbox. When the engine stops, there’s no fuel consumption, and, as a result,  no noise nor pollution. The e-booster automatically restarts the engine without noise or vibrations.
This hybrid system reduces fuel consumption by 15% and consequently reduces CO2 emissions and pollution.