1977-02-01

Heat Balance Provides Insight into Modern Engine Fuel Utilization 770221

HEAT BALANCE STUDIES were conducted on a 1975 production 5.74 V-8 and an experimental 3.69 V-6 to determine sources of fuel economy differences when they were installed in a vehicle. Heat balance results, friction and fuel economy were explored during dynamometer tests simulating road load. Comparisons were made with and without certain emission control features.
With comparable calibrations, the road load indicated efficiency was nearly the same for each engine as it would be installed in a vehicle with an appropriate axle ratio. The results suggest that engine friction and not combustion efficiency accounted for the major fuel economy difference.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Effects of Fuel Properties and Engine Design Features on the Performance of a Light-Duty Diesel Truck - A Cooperative Study

861526

View Details

TECHNICAL PAPER

Modeling and Validation of an Over-the-Road Truck

2010-01-2001

View Details

TECHNICAL PAPER

Fuel Economy Advantages on Indian 2-stroke and 4-stroke Motorcycles Fitted with Direct Fuel Injection

2003-26-0019

View Details

X