X hits on this document

168 views

0 shares

0 downloads

0 comments

37 / 67

IFEU Heidelberg

31

[IEA & OECD 1993] and 65 % ([McCALLEN et al. 1999]). This would signify relative fuel savings of 4 % or 3.5 % for a 10 % weight reduction. For a truck with an average load, a fuel consumption of about 35 l/ 100 km and a total weight of about 27 t, specific fuel savings are about 0.05 l/ (100 km*100 kg). For urban trucks the share of aerodynamic resistance will be rather lower and therefore the specific weight induced fuel savings higher. Results from the Cooperative Automotive Research (CAR) Programme suggest 3.4 % relative energy savings ([FCVT 2000]), which is in the same range as our ex- trapolation and the value derived from aerodynamic resistance. These values are also in the same range as the fuel savings which have been estimated by [MAN 2002] for long distance buses. Because the driving pattern and the aerodynamic resistance are similar, we use 0.04 l/ 100 km fuel savings for a 100 kg weight reduction.

Tab. 12: Specific fuel and end energy savings for articulated trucks by estimation method

Approximation method

Specific fuel savings l/(100 km*100 kg)

Relative energy savings (%)

Extrapolation

0.038

2.9

Aerodynamic resistance (65 %)

0.05

3.5

[FCVT 2000]

3.4

Source: IFEU 2002 from various sources

IFEU 2003

Source

Annual performance

Years in op-

Life-time performance

(km)

eration

(km)

Tab. 13: Life-time performance of long articulated commercial trucks

A class 8 truck5 averaged well over 100’000 km in 1996 according to the “American Trucking Association” ([ATA 1999]). The annual performance of articulated long dis- tance trucks in Europe is estimated in the range of 130’000 - 150’000 km with a life-time of 4 to 7 years, but annual performances of up to 200’000 km are common in transcon- tinental transport [BGL 2002]. It can be assumed that the annual performance of class 8 trucks in long distance transport in the U.S. is in a similar range. These data, however,

[ATA 1999]

> 100’000

[BGL 2002]

130’000

[GREENFLEET 2002]

90’000

[LASTAUTO OMNIBUS]

150’000

[VDA 1998]

120’000

5.4.2 Life-time performance and energy savings

The conditions of use differ between countries and continents depending on the quality of infrastructure as well as the legislations. An annual performance of new articulated trucks over 150’000 Miles (241’000 km) is common in the U.S. (http://www.trucktraderonline.com). Vehicles with a performance of over 900’000 km

and in extreme cases up to 1.4 Mio. km are still sold for further use.

7

910’000

4

600’000

IFEU 2003

5

gross weight 33'000 lbs or higher

Energy savings by light-weighting

Document info
Document views168
Page views168
Page last viewedSat Dec 10 08:28:44 UTC 2016
Pages67
Paragraphs2067
Words20631

Comments