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Combustion Control and Operating Range Expansion With Direct Injection of Reaction Suppressors in a Premixed DME HCCI Engine
Technical Paper
2003-01-0746
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Direct injection of various ignition suppressors, including water, methanol, ethanol, 1-propanol, hydrogen, and methane, was implemented to control ignition timing and expand the operating range in an HCCI engine with induced DME as the main fuel. Ultra-low NOx and smoke-less combustion was realized over a wide operating range. The reaction suppressors reduced the rate of low-temperature oxidation and consequently delayed the onset of high-temperature oxidation. Analysis of the chemical kinetics showed a reduction of OH radical in the premixed charge with the suppressors. Among the ignition suppressors, alcohols had a greater impact on OH radical reduction resulting in stronger ignition suppression. Although water injection caused a greater lowering of the temperature, which also suppressed ignition, the strong chemical effect of radical reduction with methanol injection resulted in the larger impact on suppression of oxidation reaction rates.
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Ogawa, H., Miyamoto, N., Kaneko, N., and Ando, H., "Combustion Control and Operating Range Expansion With Direct Injection of Reaction Suppressors in a Premixed DME HCCI Engine," SAE Technical Paper 2003-01-0746, 2003, https://doi.org/10.4271/2003-01-0746.Also In
Homogeneous Charge Compression Ignition (Hcci) Combustion 2003
Number: SP-1742; Published: 2003-03-03
Number: SP-1742; Published: 2003-03-03
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