Viewing 1 to 4 of 4
Technical Paper
Dustin L. McIntyre, Steven D. Woodruff, Steven W. Richardson, Michael H. McMillian, Mridul Gautam
To meet the ignition system needs of large bore high pressure lean burn natural gas engines a laser diode side pumped passively Q-switched laser igniter was designed and tested. The laser was designed to produce the optical intensities needed to initiate ignition in a lean burn high brake mean effective pressure (BMEP) engine. The experimentation explored a variety of optical and electrical input parameters that when combined produced a robust spark in air. The results show peak power levels exceeding 2 MW and peak focal intensities above 400 GW/cm2. Future research avenues and current progress with the initial prototype are presented and discussed.
Technical Paper
Chester G. Motloch, Jon P. Christophersen, Jeffrey R. Belt, Randy B. Wright, Gary L. Hunt, Raymond A. Sutula, Tien Duong, Thomas J. Tartamella, Harold J. Haskins, Ted J. Miller
Novel testing procedures and analytical methodologies to assess the performance of hybrid electric vehicle batteries have been developed. Tests include both characterization and cycle life and/or calendar life, and have been designed for both Power Assist and Dual Mode applications. Analytical procedures include a battery scaling methodology, the calculation of pulse resistance, pulse power, available energy, and differential capacity, and the modeling of calendar- and cycle-life data. Representative performance data and examples of the application of the analytical methodologies including resistance growth, power fade, and cycle- and calendar-life modeling for hybrid electric vehicle batteries are presented.
Technical Paper
Charles Mendler, Roland Gravel
A new variable compression ratio mechanism is described. This mechanism displays high durability, fast response, precision control, and low cost. High fuel economy values and low emission levels are projected.
The Energy Department recently awarded Cummins, the nation’s only independent diesel engine maker, a two-year, $4.5-million grant to boost its previous mark by 5 percentage points to 55% brake thermal efficiency.
Viewing 1 to 4 of 4