Title: An optimum fuel injector design

Authors: Ching Hsieh, Kong Ping Oh

Addresses: Vehicle Synthesis, Analysis and Simulation Center, General Motors North American Operations, Warren, MI 48090, USA. ' Vehicle Synthesis, Analysis and Simulation Center, General Motors North American Operations, Warren, MI 48090, USA

Abstract: In a typical fuel injector manufacturing process, each injector is adjusted to meet dynamic and static flow requirements. Due to the randomness of manufacturing process, a small percentage of injectors are unable to meet both requirements and have to be scrapped. This paper presents an optimisation method to find an injector design which can reduce the scrap rate. The injector design problem is cast as a mathematical optimisation problem in which the objective is to minimise the mean squared error of the static flow rate, subject to the constraint that the dynamic flow requirement is met. Results show that the scrap rate can be reduced significantly by setting the nominal values of the design parameters to their optimum values.

Keywords: fuel injector simulation; optimisation; robust design; dynamic flow; static flow; fuel injector design; scrap rate reduction; fuel injector manufacture.

DOI: 10.1504/IJVD.1999.005592

International Journal of Vehicle Design, 1999 Vol.21 No.4/5, pp.395 - 401

Published online: 21 Oct 2004 *

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