Light duties

Martin, B. and P.-H. Bigeard (1992), Hydrotreatment of diesel fuels -its impact on light- duty diesel engine pollutants . SAE paper No. 92-2268, International fuels and lubricants meeting, San Francisco, CA. 

The sum of the downstream costs adds roughly 7.9 cents per Hter (300/gal) and the adjustment of the final cost for an amount of methanol fuel equivalent ia distance driven to an equal volume gasoline involves a multiplier ranging from 1.6 to 2.0, depending on fuel specification and the assumed efficiency for methanol light-duty vehicles as compared to gasoline vehicles. The California Advisory Board has undertaken such cost assessment (11). 

Dedicated Vehicles. Only Brazil and California have continued implementing alcohols in the transportation sector. The BraziUan program, the largest alternative fuel program in the world, used about 7.5% of oil equivalent of ethanol in 1987 (equivalent to 150,000 bbl of cmde oil per day). In 1987 about 4 million vehicles operated on 100% ethanol and 94% of all new vehicles purchased that year were ethanol-fueled. About 25% of Brazil s light-duty vehicle fleet (10) operate on alcohol. The leading BraziUan OEMs are Autolatina (a joint venture of Volkswagen and Ford), GM, and Fiat. Vehicles are manufactured and marketed in Brazil. 

T. B. BlaisdeU, M. D. Jackson, and K. D. Smith, "Potential of Light-Duty Methanol Vehicles," SAE Paper 891667, SAE Euture Transportation Technology Conf. andExpo. (Vancouver, Canada, Aug. 7—10,1989), Society of Automotive Engineers, Warrendale, Pa. 

Table 7. Federal Light-Duty Exhaust Emission Standards...

Data from twenty 1989 light-duty vehicles. 

Light-Duty Recreational Surfaces. Artificial surfaces intended for incidental recreational use, eg, swimming pool decks, patios, and landscaping, are designed primarily to provide a practical, durable, and attractive surface. Minimum cost is a prime consideration and has driven the quaUty of some such products to a low level. Most surfaces in this category utilize polypropylene ribbon and a tufted fabric constmction (see Olefin polymers, polypropylene). ... 

User-Related Properties. The most important element in the player s contact with the surface is traction. Shoe traction for light-duty consumer purposes need address only provision of reasonable footing. The frictional characteristics are obviously of much greater importance in surfaces designed for athletic use. For specialized surfaces such as a track, shoe traction is especially critical. With grass-like surfaces, traction is significantly affected by pile density and height, and other aspects of fabric constmction. 

In terms of surface area covered, artificial turf is the dominant commercial product in the category of artificial surfaces described in this article. Light-duty surfaces are the largest representative, followed by tennis court and multipurpose recreational surfaces. 

G. CoraHo, "Historical Review of Light-Duty Tyre Carcass Reinforcement and the State of Current and Next Generation Technology," Conference Preprints ACS, PuhherTdivision, Philadelphia, Pa., May 1995, p. 13. 

Manually adjusted screw or ratchet take-ups that adjust the position of the tail pulley to control belt tension can be used on relatively short, light duty conveyors. Automatic take-ups are used on conveyors over about 25 to 30 m long. The most common is the weighted automatic gravity take-up (see Fig. la). Other types of automatic take-ups have hydrauHc or pneumatic powered devices to adjust a snub pulley position and maintain a constant belt tension. The requited take-up movement varies according to the characteristics of the belt constmction and the belt length. Typically, take-up movements for pHed belts are 2% to 3% of the center distance between head and tail pulley, and about 0.5% for steel cable belts. The take-up movements requited for soHd woven belts are usually shorter because of the lower elastic stretch. Take-up requirements for a particular situation should be confirmed by the belt manufacturer. 

Light-duty (2,700- -3,900 kggross vehicle weight rating) trucks ... 

A set of intermediate in-use standards also appHes during the phase-in period, 1994—1997 for passenger cars and small light-duty tmcks, and 1996—1998 for larger light-duty tmcks. 

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