A comprehensive comparative investigation of a heavy-duty vehicle’s performance, consumption and emissions during eight driving cycles

ABSTRACT

The present work investigates the exhaust emissions and fuel/energy consumption from a heavy-duty vehicle running throughout eight driving cycles, namely the European FIGE and Braunschweig, the Japanese JE05, the U.S. UDDS, NY Bus, NY Composite, the California HHDDT Cruise and the Worldwide WTVC. Initially, the cycles are discussed and compared in terms of typical cycle metrics. Afterwards, employing an experimentally based computational procedure, the engine operating envelope, engine-out pollutants (NO and soot), and fuel and energy consumption are compared for all driving schedules. It is revealed that the NY Bus, simulating very tough stop-and-go conditions is the most polluting one, followed by the highly transient NY Composite and Braunschweig. Highway cycles, although way less polluting lead to increased fuel/energy consumption owing to the elevated loads at high vehicle velocities. Strong statistical correlations between emitted pollutants, fuel and energy consumption with both relative positive acceleration and stops per km are also established.

KEYWORDS:

• Driving cycle
• nitrogen oxides
• relative positive acceleration
• soot
• transient operation
• turbocharged diesel engine

Disclosure statement

No potential conflict of interest was reported by the authors.