Technical Sheet - smart fortwo micro hybrid drive (mhd)

smart fortwo micro hybrid drive (mhd)

Environmental Benefits of Micro-Hybrid Technologies 

  • The idle start-stop system eliminates fuel consumption during idling
  • Lightweight materials, including aluminum alloy engine components, improve fuel consumption
  • Small urban vehicles allow for less traffic congestion, reducing greenhouse gas (GHG) emissions in urban areas

The ecoTECHNOLOGY for Vehicles (eTV) program has selected the smart fortwo micro hybrid drive (mhd) for testing and evaluation because of its idle start-stop system, making it the ideal vehicle for urban commuting. Additionally, this vehicle offers other environmentally friendly advanced features, such as lightweight materials, which decrease fuel consumption and reduce GHG emissions and criteria air contaminants. Based on available driving cycles, the fuel consumption improves by as much as 20% in the city when using the mhd system.

In the smart fortwo mhd, the starter and alternator have been replaced by an electric starter-generator. The mhd system cuts the engine when the vehicle speed drops below 8 km/h (about 5 mph). It automatically re-starts the engine when the driver releases the brakes.

Of particular interest to eTV is how the idle start-stop will improve fuel efficiency during high engine load operations such as air conditioning and heating. eTV will also be evaluating how the idle start-stop system performs under a variety of Canadian road conditions.

In Production / Not Available in Canada
Weight And Measurements
Weight 750 kg / 1,650 lb
Length 2.70 m / 106.1 in
Width 1.56 m / 61.4 in
Height 1.54 m / 60.7 in
Power Train
Drive Type Rear-wheel
Engine Inline 3-cylinder, naturally aspirated, with idle start-stop
Displacement 999 cm3 / 61 cu in
Transmission 5-speed automatic
Torque 92 Nm / 68 lb-ft @ 4,500 rpm
Power 52 kW / 70 hp @ 5,800 rpm
Fuel Efficiency
Fuel Type Gasoline Premium Unleaded (95 Octane)
Fuel Efficiency1 City: 5.1 L/100 km / 55 Cdn mpg
Highway: 3.8 L/100 km / 70 Cdn mpg
Combined: 4.3 L/100 km / 66 Cdn mpg
Driving Range1 767 km / 477 mi
Fuel Tank Capacity 33 L / 7.3 gal (Cdn) / 8.7 gal (U.S.)
CO2 Emissions 103 g/km
Top Speed 145 km/h / 90 mph
Acceleration 0-100 km/h (62 mph) in 13.3 seconds
Drag Coefficient 0.34
Brakes (f/r) Disc / Drum
Seating Capacity 2
eTV Fleet Information
Date Acquired July 2009
Current Status Test Vehicle

1Based on European Driving Cycles