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2019 | OriginalPaper | Chapter

5. Prospects and Challenges for Deploying Direct Injection Technology for Compressed Natural Gas Engines

Authors : Rajesh Kumar Prasad, Tanmay Kar, Avinash Kumar Agarwal

Published in: Natural Gas Engines

Publisher: Springer Singapore

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Abstract

In this chapter, prospects and challenges of direct injection (DI) compressed natural gas (CNG) engine technology are dealt with and compared with conventional port fuel injection (PFI) technology used for CNG induction. DI injector nozzle geometries are discussed along with their performance using optical diagnostics tools such as Schlieren imaging and planar laser-induced fluorescence (PLIF) technique. Different CNG induction methodologies are compared along with different fueling arrangements such as induction of 100% natural gas (NG), bi-fuel, and dual-fuel systems. DI and PFI engines are compared for volumetric efficiency for varying fuel injection timings. In a single-cylinder prototype engine, engine parameters are analyzed for a different start of injection (SOI) timings with varying brake mean effective pressure (BMEP) and equivalence ratio (Φ). Advanced SOI reduced the brake-specific fuel consumption (BSFC), increased the brake thermal efficiency (BTE), and reduced the emissions.

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Title: Prospects and Challenges for Deploying Direct Injection Technology for Compressed Natural Gas Engines
Authors: Rajesh Kumar Prasad
Tanmay Kar
Avinash Kumar Agarwal
Publisher: Springer Singapore
Book: Natural Gas Engines
Print ISBN: 978-981-13-3306-4

Electronic ISBN: 978-981-13-3307-1

Copyright Year: 2019
DOI: https://doi.org/10.1007/978-981-13-3307-1_5