Studies on the Effect of In-Cylinder Charge Stratifications on High Load HCCI Combustion

2016 ◽  
Vol 9 (4) ◽  
pp. 2337-2349 ◽  
Author(s):  
Kei Yoshimura ◽  
Shunichi Mori ◽  
Kenjiro Nakama ◽  
Jin Kusaka
Keyword(s):  
High Load ◽  
Hcci Combustion

HCCI Operability Limits: The Impact of Refinery Stream Gasoline Property Variation

2013 ◽  
Vol 135 (8) ◽  
Author(s):  
Joshua S. Lacey ◽  
Zoran S. Filipi ◽  
Sakthish R. Sathasivam ◽  
William J. Cannella ◽  
Peter A. Fuentes-Afflick
Keyword(s):  
Thermal Conditions ◽  
The United States ◽  
High Load ◽  
Fuel Properties ◽  
Research Octane Number ◽  
Property Variation ◽  
Hcci Combustion ◽  
Load Limit ◽  
Low Load ◽  
The Impact

Homogeneous charge compression ignition (HCCI) combustion is highly dependent on in-cylinder thermal conditions favorable to autoignition, for a given fuel. Fuels available at the pump can differ considerably in composition and autoignition chemistry; hence strategies intended to bring HCCI to market must account for the fuel variability. To this end, a test matrix consisting of eight gasoline fuels composed of blends made solely from refinery streams was investigated in an experimental, single cylinder HCCI engine. The base compositions were largely representative of gasoline one would expect to find across the United States, although some of the fuels had slightly lower average octane values than the ASTM minimum specification of 87. All fuels had 10% ethanol by volume included in the blend. The properties of the fuels were varied according to research octane number (RON), sensitivity (S=RON-MON) and the volumetric fractions of aromatics and olefins. For each fuel, a sweep of the fuelling was carried out at each speed from the level of instability to excessive ringing to determine the limits of HCCI operation. This was repeated for a range of speeds to determine the overall operability zone. The fuels were kept at a constant intake air temperature during these tests. The variation of fuel properties brought about changes in the overall operating range of each fuel, as some fuels had more favorable low load limits, whereas others enabled more benefit at the high load limit. The extent to which the combustion event changed from the low load limit to the high load limit was examined as well, to provide a relative criterion indicating the sensitivity of HCCI range to particular fuel properties.

New Downsized Diesel Engine Concept with HCCI Combustion at High Load Conditions

2015 ◽  
Author(s):  
Andrey Kuleshov ◽  
Alexey Kuleshov ◽  
Khamid Mahkamov ◽  
Timo Janhunen ◽  
Victor Akimov
Keyword(s):  
Diesel Engine ◽  
High Load ◽  
Hcci Combustion ◽  
Engine Concept ◽  
Load Conditions

Effects of In-Cylinder Flow and Stratified Mixture on HCCI Combustion in High Load

2018 ◽  
Author(s):  
Kei Yoshimura ◽  
Shogo Watanabe ◽  
Kazuya Ogawa ◽  
Tatsuya Kuboyama ◽  
Yasuo Moriyoshi
Keyword(s):  
High Load ◽  
Hcci Combustion ◽  
Cylinder Flow

The Origin of Pressure Waves in High Load HCCI Combustion: A High-Speed Video Analysis

2011 ◽  
Vol 183 (11) ◽  
pp. 1266-1281 ◽  
Author(s):  
Daniel Dahl ◽  
Mats Andersson ◽  
Ingemar Denbratt
Keyword(s):  
Video Analysis ◽  
High Speed ◽  
High Load ◽  
Pressure Waves ◽  
High Speed Video ◽  
Hcci Combustion

Characterization of Engine Control Authority on HCCI Combustion as the High Load Limit is Approached

2013 ◽  
Vol 6 (1) ◽  
pp. 553-568 ◽  
Author(s):  
James P. Szybist ◽  
K. Dean Edwards ◽  
Matthew Foster ◽  
Keith Confer ◽  
Wayne Moore
Keyword(s):  
High Load ◽  
Engine Control ◽  
Hcci Combustion ◽  
Load Limit ◽  
Control Authority

HCCI Operability Limits: The Impact of Refinery Stream Gasoline Property Variation

2012 ◽  
Author(s):  
Joshua S. Lacey ◽  
Sakthish R. Sathasivam ◽  
Zoran S. Filipi ◽  
William J. Cannella ◽  
Peter A. Fuentes-Afflick
Keyword(s):  
Thermal Conditions ◽  
The United States ◽  
High Load ◽  
Fuel Properties ◽  
Property Variation ◽  
Hcci Combustion ◽  
Auto Ignition ◽  
Load Limit ◽  
Low Load ◽  
The Impact

HCCI combustion is highly dependent on in-cylinder thermal conditions favorable to auto-ignition, for a given fuel. Fuels available at the pump can differ considerably in composition and auto-ignition chemistry, hence strategies intended to bring HCCI to market must account for the fuel variability. To this end, a test matrix consisting of eight gasoline fuels composed of blends made solely from refinery streams was investigated in an experimental, single cylinder HCCI engine. The base compositions were largely representative of gasoline one would expect to find across the United States, although some of the fuels had slightly lower average octane values than the ASTM minimum specification of 87. All fuels had 10% ethanol by volume included in the blend. The properties of the fuels were varied according to research octane number (RON), sensitivity (S=RON−MON) and the volumetric fractions of aromatics and olefins. For each fuel, a sweep of the fuelling was carried out at each speed from the level of instability to excessive ringing to determine the limits of HCCI operation. This was repeated for a range of speeds to determine the overall operability zone. The fuels were kept at a constant intake air temperature during these tests. The variation of fuel properties brought about changes in the overall operating range of each fuel, as some fuels had more favorable low load limits, whereas others enabled more benefit at the high load limit. The extent to which the combustion event changed from the low load limit to the high load limit was examined as well, to provide a relative criterion indicating the sensitivity of HCCI range to particular fuel properties.

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