Diesel Engine Combustion Research
The combination of superior fuel economy and durability has made diesel engines popular worldwide. Because these engines can emit large amounts of ozone-forming constituents and particulates, they are subject to increasingly stringent regulations that require continual improvements in the combustion process.
Southwest Research Institute (SwRI) helps engine manufacturers and suppliers meet these regulations and emissions standards. SwRI's Engine, Emissions and Vehicle Research Division has achieved certification to ISO 9001, ensuring compliance with stringent quality control procedures and standards in design, development, and research. With more than 50 years of service to the automotive and engine manufacturing industry, SwRI engineers offer expertise in a wide range of diesel-related technologies, including:
Experienced Institute staff members improve diesel combustion and reduce emissions caused by light-, medium-, and heavy-duty engine applications including:
SwRI provides a comprehensive range of services, including:
SwRI engineers investigate, design, and develop improved diesel engine combustion systems, reducing gaseous and particulate emissions over specified test cycles by using advanced technologies involving:
Engineers refine the combustion and fuel injection processes by analyzing the measured crank-angle resolved cylinder pressure and fuel injection signals. Using the resulting data, SwRI determines combustion-related parameters, including:
Institute engineers monitor combustion and fuel injection processes on production and prototype engines. Using SwRI-developed or commercially available data acquisition systems, staff members measure a wide range of engine parameters, such as:
Prototype and existing engine designs are assessed using advanced analytical techniques such as:
With more than 30 developmental steady-state engine dynamometer test stands, SwRI conducts sophisticated emissions reduction programs for future engines. The Institute also has transient-capable test stands and light-duty chassis dynamometers supported by certification-quality equipment. Up-to-date instrumentation in SwRI's engine laboratories is used to evaluate engines ranging from small generator engines to large marine and locomotive powerplants. SwRI measures a wide range of engine parameters, including:
Modeling and Design
Modeling: Computer-generated combustion models are essential to achieving low emissions while meeting other engine constraints such as maximum cylinder pressure, exhaust temperature, and compressor pressure ratio. Engineers use simulations in development programs that vary parameters such as:
Using the Institute-developed JETMIX code, engineers simulate diesel engine parameters such as:
Design: To refine an existing engine or design a new engine, engineers use sophisticated solid modeling techniques to produce prototype components and assemblies, including:
SwRI provides a comprehensive range of measurement and analytical capabilities to support development of a next-generation engine or to calibrate a change on an older engine. SwRI offers services including:
This brochure was published in May 1999. For more information about diesel engine combustion research, contact Ryan Roecker, Manager, Phone (210) 522-3195, Fax (210) 522-2019, Engine, Emissions and Vehicle Research Division, Southwest Research Institute, P.O. Drawer 28510, San Antonio, Texas 78228-0510.