Mild hybrid

[1][2][3] The mild hybrid's electric motor provides greater efficiency through the use of a single device that is essentially an integrated starter/alternator sometimes known as a generator-motor unit.

Vehicles equipped with a mild-hybrid system typically see anywhere from a 0.4 to 1.7 km/l (1.1 to 4.8 mpg‑imp; 0.9 to 4.0 mpg‑US) improvement in fuel economy relative to comparable models without the technology – a saving of 2 to 8 percent.

According to the EPA, a 2009 Saturn Vue Greenline equipped with the BAS hybrid system delivers a 27% improvement in combined fuel economy over the non-hybrid version (FWD 4cyl).

[11] During the 2008 Olympic Games in Beijing in August, Chinese automobile manufacturer Chang'an Motors supplied a number of hybrid-drive cars as taxis for the athletes and spectators.

[16] The concept-car C5 Airscape has an improved version of that, adding regenerative braking and traction assistance functionalities, and ultracapacitors for energy buffering.