The Effects of Technology on Automobile Fuel Economy Under Canadian Conditions

Fuel economy degrades significantly as ambient temperature decreases. Diesel, stratified charge, lean burn and turbocharged-knock-limited engined automobiles show significantly less degrdation in fuel economy and emissions than do conventionally-carbureted, catalyst-equipped automobiles. In particular, the new diesel automobiles offer large benefits in weight-normalized fuel economy and emissions for the wide temperature range found in Canada's climate.