National Traffic Safety and Environment Lavoratory

HOMEResearch ActivitiesR&D of Next Generation Heavy-duty Low Emission Vehicles

R&D of Next Generation Heavy-duty Low Emission Vehicles

Technology development of next-generation heavy-duty vehicles with ultra low fuel consumption and zero or near-zero emissions of air pollution substances contained in exhaust gases that can replace conventional diesel powered vehicles is important to fundamentally solve environmental and energy problems caused by automobiles. Under 3-year project beginning 2002, the Laboratory is developing a DME (Dimethyl Ether) truck, hybrid bus and truck, CNG truck and super clean diesel engine sponsored by Ministry of Land, Infrastructure and Transport undertaken under the framework of cooperation among the industry, academia and government. The prototype vehicles will be shown at Tokyo motor show in 2004.

Images of Next-Generation Low Emission Vehicles

Development Objectives

  • To achieve power output and fuel efficiency of new generation heavy duty vehicles equivalent to diesel vehicles, with a final goal of realizing a smokeless vehicle with a nitrogen oxide (NOx) emission level that is one-tenth emission limit set forth in the new long-term regulation.
  • To not only take the environment into account but also take safety and noise reduction into consideration.
  • To be sufficiently feasible.
Vehicles to be developed DME truck Natural gas truck Series hybrid bus Parallel hybrid truck Super clean diesel engine
Current targeted values Gas emission NOx One-quarter of the new long-term regulation limit One-quarter of the new long-term regulation limit One-quarter of the new long-term regulation limit One-tenth of the new long-term regulation limit One-tenth of the new long-term regulation limit
PM ≒0.0g/kwh
(No black smoke emission)
≒0.0g/kwh
(No black smoke emission)
One-quarter of the new long-term regulation limit One-tenth of the new long-term regulation limit One-half of the new long-term regulation limit
Fuel efficiency Eqauivalent to base diesel engines Less tan a diesel engine with CO2 emission Over doubled Over doubled Improved by 10% from the current level
Description Type of vehicle Heavy duty truck for long-distance transport Heavy duty truck for long-distance transport bus truck Engine(engines for trucks are assumed)
Engine (Power) Power : 200kw Power : 235kw-257kw Engine : 5L
Generator : 40kw
Motor : 90kwx2
Engine : 4L
Generator : 110kw
Motor : Approx. 70kw
Power : 280kw
Total vehicle weight 18 t 25 t 14 t 13 t 25 t (assumed)
Load or Seating capacity 10 t - 78 people 8 t 13 t (assumed)
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