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Modeling and Control of a High Pressure Combined Air/Fuel Injection System

[+] Author Affiliations
Chao Yong, Eric J. Barth

Vanderbilt University, Nashville, TN

Paper No. DSCC2009-2769, pp. 361-368; 8 pages
doi:10.1115/DSCC2009-2769
From:
  • ASME 2009 Dynamic Systems and Control Conference
  • ASME 2009 Dynamic Systems and Control Conference, Volume 2
  • Hollywood, California, USA, October 12–14, 2009
  • Conference Sponsors: Dynamic Systems and Control Division
  • ISBN: 978-0-7918-4893-7 | eISBN: 978-0-7918-3860-0
  • Copyright © 2009 by ASME

abstract

A high pressure combined air-fuel injection system is designed and tested for an experimental free liquid-piston engine compressor. The application discussed utilizes available high pressure air from the compressor’s reservoir, and high pressure fuel to mix and then inject into a combustion chamber. This paper addresses the modeling, design and control for this particular high-pressure air-fuel injection system, which features an electronically controlled air/fuel ratio control scheme. This system consists of a fuel line and an air line, whose mass flow rates are restricted by metering valves. These two lines are connected to a common downstream tube where air and fuel are mixed. By controlling the upstream pressures and the orifice areas of the metering valves, desired A/F ratios can be achieved. The effectiveness of the proposed system is demonstrated by a lumped-parameter model in simulation and validated by experiments.

Copyright © 2009 by ASME

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