CO₂ Emission Benefit of Diesel (versus Gasoline) Powered Vehicles

Abstract

Concerns regarding global warming have increased the pressure on automobile manufacturers to decrease emissions of CO 2 from vehicles. Diesel vehicles have higher fuel economy and lower CO 2 emissions than their gasoline counterparts. Increased penetration of diesel powered vehicles into the market is a possible transition strategy toward a more sustainable transportation system. To facilitate discussions regarding the relative merits of diesel vehicles it is important to have a clear understanding of their CO 2 emission benefits. Based on European diesel and gasoline certification data, this report quantifies such CO 2 reduction opportunities for cars and light duty trucks in today's vehicles and those in the year 2015. Overall, on a wellto-wheels per vehicle per mile basis, the CO 2 reduction opportunity for today's vehicles is approximately 24-33%. We anticipate that the gap between diesel and gasoline wellto-wheel vehicle CO 2 emissions will decrease to approximately 14-27% by the year 2015.

The impact of emissions-based taxes on the retirement of used and inefficient vehicles: The case of Switzerland

“…Section 6 concludes. rate of a vehicle is proportional to the fuel consumption rate of the vehicle, with the proportionality factor differing across diesel and gasoline engines (Sullivan et al, 2004), so this cutoff is equivalent to 8.4 liters/100 km for gasoline cars and 7.5 liters/100 km for diesel cars.…”

CO2 control by means of the increased penetration of diesel passenger cars in Finland

“…The CO 2 emissions of the KBA file are used, assuming the same annual mileage for the current and future gasoline and Diesel passenger cars. In a first stage, the CO 2 emissions are calculated using the current data; in a second one, the future CO 2 emissions are estimated taking into account the most probable future technologies (Sullivan et al, 2004). This study is limited to CO 2 emissions from new registered passenger cars.…”

“…A previous study (Sullivan et al, 2004), showed a significant decrease of CO 2 emissions in the USA by the introduction of Diesel passenger cars. This study did not take into account a sales-weighted approach.…”

Intelligent Usage of Internal Combustion Engines in Hybrid Electric Vehicles

“…Assuming a density of 700 kg/m3, 1 kg of gasoline produces 3.42 kg of CO2 (tank to wheel emissions). Sullivan et al 2004 consider a multiplying factor of 1.162 to pass from TTW to WTW emissions of CO2. Thus, a kg of gasoline can be assumed to produce 3.98 kg of CO2 (WTW).…”