2007 Heavy-Duty Diesel Engine Benchmarking Program 

Competitive product benchmarking is a standard practice among engine, vehicle and component manufacturers, and has great value for evaluating state-of-the-art technology. Southwest Research Institute® (SwRI®) offers a benchmarking program based on thorough characterization of each engine and extensive testing under equal conditions. This program provides comparative data on engine performance, emissions and efficiency, as well as an assessment of emissions reduction technologies.

On-Highway Engine Offerings For 2007

• Caterpillar C15
• Cummins ISX
• Detroit Diesel Series 60 14L
• Volvo D13
• Cummins Dodge Ram 6.7L
• GM/Isuzu Duramax 6600
• Ford/International Power Stroke® 6.4LCylinder head cracking

Tests Performed

• 125-hour engine break-in. The engine and aftertreatment will be degreened using a cycle with approximately 70% duty factor.
   
• Diesel particulate filter (DPF) evaluation. The DPF will be loaded using a cycle consisting of repeated snap throttle accelerations from idle with limited operation at higher engine speeds. The exhaust temperature will be below the passive regeneration temperature for most of the cycle. The goal is to capture second-by-second data during 2-3 active regeneration events. Five thermocouples will be inserted from the rear of the DPF at locations across its diameter to measure the radial temperature distribution profile. Data of interest during the active regenerations include:

• Incremental fuel consumption increase
• Aftertreatment temperature and delta-P profiles
• Changes in air flow or EGR function during regeneration

• Transient and ESC emissions tests. Cold and hot transient tests and a single-filter ESC test.
   
• Steady-state mapping. Nominally at 100 RPM and 10% load steps, 200 points maximum. Data will include:

• Cylinder pressure
• Heat rejection to radiator, aftercooler(s) and EGR cooler(s)
• Engine-out AVL 415S smoke
• Turbocharger speed, power and efficiencies
• Injection number and timing based on electrical signals

• Throttle response tests at three engine speeds
   
• Engine teardown and measurements

• High-resolution digital photographs of components
• Measurement of key engine dimensions
• Component weights

• Cylinder head flow bench testing

• Flow coefficients vs. L/D
• Non-dimensional swirl number vs. L/D

SwRI’s heavy-duty diesel engine benchmarking program is designed to test and characterize competitive engines to assess their relative performance, emissions and technology.

Deliverables

• DPF Evaluation Report
• Mapping data in Excel spreadsheets
• Performance and Emissions Test Report
• PowerPoint summary of performance and emissions results
• Flow Bench Test Report
• Teardown and Technical Assessment Report
• High-resolution digital photographs from engine teardown

Volume Discounts

• 5% discount on the total amount if subscribing to four engines
• 10% discount on the total amount if subscribing to five or more engines

As part of the ongoing diesel engine benchmarking program, SwRI previously evaluated cooled EGR systems used by several engine manufacturers. Shown are the major components of the Series 60 Detroit Diesel EGR system.

This flyer was published in October 2006. For more information about the 2007 Heavy-Duty Diesel Engine Benchmarking Program, contact Mike Ross, Program Manager, Engine, Emissions and Vehicle Research Division, Southwest Research Institute, P.O. Drawer 28510, San Antonio, Texas 78228-0510, Phone (210) 522-2690, Fax (210) 522-3950.

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