| Attributes | Values |
|---|
| rdf:type
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| Description
| - To reduce exhaust emissions and dependency on petroleum based fuels, various alcohols have been considered as neat fuels or gasoline substitutes for spark ignition engines. In this study, the effects of blends of 30% and 50% of nbutanol (1-butanol) with gasoline on combustion process, engine control unit adaptation and exhaust emissions before and after a three-way catalyst were examined on a 1.2-liter, three-cylinder spark ignition engine coupled to engine dynamometer. The adaptation of engine control unit and its effects on the fuel injection rates and air-fuel ratio, along with in-cylinder indicated pressures, exhaust gas temperatures and gaseous emissions were investigated at thirteen steady-state operating points. Where the engine maintained stoichiometric air-fuel ratio on gasoline, the engine control unit has adapted relatively successfully: Stoichiometric operation was observed on both butanol blends, with lower HC both before and after catalyst, comparable CO, and slightly higher engine-out NOx and lower or higher NOx after the catalyst. With increasing rpm and loads, the engine control unit has retarded the spark timing to prevent excessive knock. Compared to gasoline, the duration of the early combustion stage was, for butanol blends slightly shorter, and the length of the main phase of combustion was generally comparable. Flame propagation was faster with higher butanol content. Where the engine employed commanded enrichment, the fueling rate was comparable among fuels, resulting in relative enleanment when operating on blends, with lower HC and CO, higher NOx, and higher exhaust gas temperatures by up to 50 °C. Maximum engine torque has decreased by up to 5%. Changes in cycle-to-cycle variability were non-uniform. The findings were generally positive, and while limited to the one engine tested, suggest some opportunity for further investigation of the use of higher content n-butanol blends as candidate fuels for existing fleets.
- To reduce exhaust emissions and dependency on petroleum based fuels, various alcohols have been considered as neat fuels or gasoline substitutes for spark ignition engines. In this study, the effects of blends of 30% and 50% of nbutanol (1-butanol) with gasoline on combustion process, engine control unit adaptation and exhaust emissions before and after a three-way catalyst were examined on a 1.2-liter, three-cylinder spark ignition engine coupled to engine dynamometer. The adaptation of engine control unit and its effects on the fuel injection rates and air-fuel ratio, along with in-cylinder indicated pressures, exhaust gas temperatures and gaseous emissions were investigated at thirteen steady-state operating points. Where the engine maintained stoichiometric air-fuel ratio on gasoline, the engine control unit has adapted relatively successfully: Stoichiometric operation was observed on both butanol blends, with lower HC both before and after catalyst, comparable CO, and slightly higher engine-out NOx and lower or higher NOx after the catalyst. With increasing rpm and loads, the engine control unit has retarded the spark timing to prevent excessive knock. Compared to gasoline, the duration of the early combustion stage was, for butanol blends slightly shorter, and the length of the main phase of combustion was generally comparable. Flame propagation was faster with higher butanol content. Where the engine employed commanded enrichment, the fueling rate was comparable among fuels, resulting in relative enleanment when operating on blends, with lower HC and CO, higher NOx, and higher exhaust gas temperatures by up to 50 °C. Maximum engine torque has decreased by up to 5%. Changes in cycle-to-cycle variability were non-uniform. The findings were generally positive, and while limited to the one engine tested, suggest some opportunity for further investigation of the use of higher content n-butanol blends as candidate fuels for existing fleets. (en)
|
| Title
| - Effect of Higher Content N-butanol Blends on Combustion, Exhaust Emissions and Catalyst Performance of an Unmodified SI Vehicle Engine
- Effect of Higher Content N-butanol Blends on Combustion, Exhaust Emissions and Catalyst Performance of an Unmodified SI Vehicle Engine (en)
|
| skos:prefLabel
| - Effect of Higher Content N-butanol Blends on Combustion, Exhaust Emissions and Catalyst Performance of an Unmodified SI Vehicle Engine
- Effect of Higher Content N-butanol Blends on Combustion, Exhaust Emissions and Catalyst Performance of an Unmodified SI Vehicle Engine (en)
|
| skos:notation
| - RIV/68407700:21220/12:00202760!RIV13-MSM-21220___
|
| http://linked.open...avai/riv/aktivita
| |
| http://linked.open...avai/riv/aktivity
| - P(ED2.1.00/03.0125), P(TE01020020)
|
| http://linked.open...iv/cisloPeriodika
| |
| http://linked.open...vai/riv/dodaniDat
| |
| http://linked.open...aciTvurceVysledku
| |
| http://linked.open.../riv/druhVysledku
| |
| http://linked.open...iv/duvernostUdaju
| |
| http://linked.open...titaPredkladatele
| |
| http://linked.open...dnocenehoVysledku
| |
| http://linked.open...ai/riv/idVysledku
| - RIV/68407700:21220/12:00202760
|
| http://linked.open...riv/jazykVysledku
| |
| http://linked.open.../riv/klicovaSlova
| - Internal combustion engines; combustion; alternative fuels; butanol; n-butanol; spark ignition engine; heat release rate; combustion timing; combustion analysis; adaptation; engine control unit; exhaust emissions (en)
|
| http://linked.open.../riv/klicoveSlovo
| |
| http://linked.open...odStatuVydavatele
| - US - Spojené státy americké
|
| http://linked.open...ontrolniKodProRIV
| |
| http://linked.open...i/riv/nazevZdroje
| - Society of Automotive Engineers Technical Paper Series
|
| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
| |
| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...vavai/riv/projekt
| |
| http://linked.open...UplatneniVysledku
| |
| http://linked.open...v/svazekPeriodika
| |
| http://linked.open...iv/tvurceVysledku
| - Mazač, M.
- Pechout, M.
- Vojtíšek, Michal
|
| issn
| |
| number of pages
| |
| http://bibframe.org/vocab/doi
| |
| http://localhost/t...ganizacniJednotka
| |
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