Extending the High Load Operating Limit of a Naturally-Aspirated Gasoline HCCI Combustion Engine

2010 ◽  
Vol 3 (1) ◽  
pp. 681-699 ◽  
Author(s):  
Hanho Yun ◽  
Nicole Wermuth ◽  
Paul Najt
Keyword(s):  
Combustion Engine ◽  
High Load ◽  
Hcci Combustion

scholarly journals HCCI Combustion Engine Fueled with DME and DME-Reformed Gas

2004 ◽  
Vol 70 (696) ◽  
pp. 2205-2212
Author(s):  
Toshio SHUDO ◽  
Yoshitaka ONO ◽  
Takehiro TAKAHASHI
Keyword(s):  
Combustion Engine ◽  
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.

Strategien zur Regelung von HCCI-BrennverfahrenControl Concepts for a Gasoline HCCI Combustion Engine

2009 ◽  
Vol 57 (1) ◽  
Author(s):  
Roland Karrelmeyer ◽  
Gerald Graf ◽  
Daniel Scherrer ◽  
Wolfgang Fischer ◽  
Jean-Pierre Harthout
Keyword(s):  
Combustion Engine ◽  
Hcci Combustion

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
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