We present the results of a statistical study on the effects of the following four operational changes on the fuel consumption of scheduled buses: a change in the brand of engine oil used, a switch from crossply to radial tires, engine overhaul, and vehicle maintenance. This is an empirical...

We present the results of a factorization analysis of automobile fuel consumption in actual traffic. Three specific studies related, respectively, to trip purpose, road type, and time period of trip generation were carried out. In each study, the variations in vehicle fuel consumption were...

Index decomposition methodology was a technique first used in the late 1970s to study the impact of changes in product mix on industrial energy demand. A survey in 1995 listed a total of 51 studies. Since then, many new studies and several new decomposition methods have been reported and the...

We present the results of a statistical analysis on the fuel-consumption characteristics of 115 automobiles. The factors considered are vehicle weight, engine size, cumulative mileage, vehicle age, vehicle maintenance, make of vehicle, fuel brand, travel speed, trip length, travel time per trip,...

We have studied the fuel-consumption characteristics of 387 buses under actual operating conditions over a 12-month period. We have examined the variations in monthly fuel efficiency among service routes, bus models, and months of the year, as well as the effects of engine overhaul, weather...

Several recent studies have dealt with the methodology of decomposing the change in industrial energy consumption between two years into three separate components. Each component is associated with one of the following three effects: changes in production level, product-mix, and sectoral energy...

We examine how the level of sector disaggregation, and the way industrial sectors are aggregated, influence the estimate of the effect of structural change on the growth of industrial energy consumption. If these influences are great, it would be misleading to use the results obtained for a...

We present the results of a study on process energy use of two asphalt-mixing plants. The production process involves the mixing of granite aggregates and bitumen to give asphalt mixtures. The mixtures are widely used as a road-paving material. A large part of the process energy use is for...

The structure of industrial energy use and output are studied, based on the developments of the two fast growing economies of Singapore and Taiwan. Changes in the composition of industry are analyzed, creating a better picture of structural and technical effects on the ratio of energy used to...

Using the regression technique, we have studied the fuel-consumption characteristics of a fleet of public buses under actual operating conditions. The fuel consumption was measured on a daily basis and the effects of the service routes, vehicle models, engine overhaul, vehicle speed and loads,...