Japan Proposes Tougher Fuel Economy Regulations; Passenger Car Fuel Economy to Increase 23.5% by 2015
Nikkei. Automakers in Japan would be required to boost the fuel efficiency of their passenger cars by an average of 23.5% by fiscal 2015 under new regulatory proposals unveiled Friday by the Ministry of Economy, Trade and Industry in partnership with the Ministry of Transport. (Earlier post.)
Under the proposal, passenger car fuel efficiency will need to increase from an average 13.6 km/liter (7.35 l/100km or 32 mpg US) in 2004 to 16.8 km/liter (6 l/100km or 40 mpg US)—an increase of 23.5%.
For cars in the lowest weight class of 600kg or less, 2015 target consumption is 22.5 km/liter (4.4 l/100km or 53 mpg US); for cars in the top weight class of 2,271kg and above, 2015 target consumption is 7.4 km/liter (13.51 l/100km or 17.4 mpg US).
The Ministries are soliciting opinions from the public before finalizing the plan and revising the regulations, which are slated to go into effect next spring.
Japan first introduced fuel-efficiency regulations in fiscal 1999, mandating automakers to boost mileage some 23% by fiscal 2010 compared to levels in fiscal 1995. Most automakers have already met that goal.
Currently, separate rules govern diesel and gasoline vehicles, while the new regulations will band them together. The requirements will be set according to 16 different categories depending on the vehicle’s weight. The new rules will also modify how fuel economy is gauged to include heavy traffic and other driving conditions. Because the new method will more accurately reflect fuel efficiency under actual driving conditions, published figures are expected to decline 10-20%.
|Proposed Average Fuel Economy|
|Vehicle class||2004 value||2015 est. value||% change|
|Source: Ministry of Economy, Trade and Industry.|
|Passenger cars||13.6 km/liter
32.0 mpg US
39.5 mpg US
|Small buses||8.3 km/liter
19.5 mpg US
21.0 mpg US
|Light cargo trucks||13.5 km/liter
31.8 mpg US
35.8 mpg US
Fuel economy values proposal (Japanese)