Browse Publications Technical Papers 2000-01-0964

Cooling System Optimization for Euro4 - EPA/02 Heavy Duty Trucks 2000-01-0964

Euro4 and EPA/02 emission regulations for the European and North American Heavy Duty truck market will require development of high efficiency, low pollution diesel engines. Informations received from main engine, truck manufacturers and literature surveys performed during the past two years shows that several technical solutions are being evaluated in order to reach the required emission levels.
These technical solutions can be divided into 3 main groups:
  1. 1
    Further optimization of fuel combustion including: increase of air to fuel ratio, further retardation of fuel injection timing.
  2. 2
    Cooled EGR including: high recycled exhaust gas ratios, short EGR loop, compressed and aftercooled EGR.
  3. 3
    Exhaust gas aftertreatment including: de-NOx catalysts, particle traps, particle afterburning.
Different technical solutions will have different impacts on the heat rejection requirements and consequently on the layout and costs of the future cooling systems.
This paper describes the study performed by Valeo Advanced Cooling System Development Team, targeting evaluation of the future cooling systems for Heavy Duty commercial vehicles, 2002 and beyond.
Following works will be described:
  • Review of EPA/02-Euro4 emission regulations
  • Evaluation of EPA/02 - Euro 4 engine development impact on cooling system heat rejection and durability requirements
  • Analysis of possible technical solutions for the cooling system
  • Description of the computation methodology used for system computation
  • Study case with a simulation approach for evaluation of a new cooling system concept


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


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:

New EGR Technology Retains HD Diesel Economy with 21st Century Emissions


View Details


Progress in the Pollutant Reduction of Vehicle Engines


View Details


A Premium Heavy Duty Engine Concept for 2005 and Beyond


View Details