FIGURE 6-1 Comparison of 2015-2020 new-vehicle potential fuel-saving technologies for seven vehicle types: tractor trailer (TT), Class 3-6 box (box), Class 3-6 bucket (bucket), Class 8 refuse (refuse), transit bus (bus), motor coach (coach), and Class 2b pickups and vans (2b).

FIGURE 6-1 Comparison of 2015-2020 new-vehicle potential fuel-saving technologies for seven vehicle types: tractor trailer (TT), Class 3-6 box (box), Class 3-6 bucket (bucket), Class 8 refuse (refuse), transit bus (bus), motor coach (coach), and Class 2b pickups and vans (2b).

NOTE: TIAX (2009) only evaluated the potential benefits of driver management and coaching for the tractor-trailer class of vehicles. It is clear to the committee that other vehicle classes would also benefit from driver management and coaching, but studies showing the benefits for specific vehicle classes are not available. For more information, see the subsection “Driver Training and Behavior” in Chapter 7. Also, potential fuel reductions are not additive. For each vehicle class, the fuel consumption benefit of the combined technology packages is calculated as follows: [% FCRpackage = 100 [1 − (1 − {% FCRtech1/100}) (1 − {% FCRtech2/100)} … (1 − {% FCRtechN/100})]. Values shown are for one set of input assumptions. Results will vary depending on these assumptions. SOURCE: TIAX (2009).

bers shown for individual technologies and other options are not additive. For each vehicle class, the % FCR associated with combined options is as follows:

where % FCRtechx is the percent benefit of an individual technology.

DIRECT COSTS AND BENEFITS

Technology Applications to Specific Vehicle Classes

The technologies discussed in Chapters 4 and 5 can be consolidated into 12 categories and then a judgment made regarding the benefits by broad vehicle class. Table 6-1 shows the applications in which these technologies will be effective. Some technologies are broad enough to be applied to all classes: tires and wheels, weight reduction, transmission and driveline, engine efficiency, and hybridization. Others are more specific to the class of vehicle, such as replacing gasoline engines with diesel engines (dieselization), which is applicable only to Class 2 to 7 vehicles, where gasoline engines are offered today.

Fuel Consumption Reductions

The fuel consumption reductions identified in Chapters 4 and 5 can be summarized in a broad matrix of vehicle applications versus technology, for the years 2015 to 2020, as shown in Table 6-2 and Figure 6-1. The most effective

TABLE 6-1 Technologies and Vehicle Classes Likely to See Benefits

Technologies

Tractor Trailer

Urban Bus

Motor Coach

Class 3-7

Class 2b

Refuse Truck

Trailer aerodynamics

X

 

 

 

 

 

Cab aerodynamics

X

 

X

X

X

 

Tires and wheels

X

X

X

X

X

X

Weight reduction

X

X

X

X

X

X

Transmission and driveline

X

X

X

X

X

X

Accessory electrification

X

X

X

X

X

 

Overnight idle reduction

X

 

 

 

 

 

Idle reduction

X

X

X

X

 

 

Engine efficiency

X

X

X

X

X

X

Waste heat recapture

X

 

X

 

 

 

Hybridization

X

X

X

X

X

X

Dieselization

 

 

 

X

X

 



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