Combustion Control and Operating Range Expansion in an HCCI Engine with Selective Use of Fuels with Different Low-Temperature Oxidation Characteristics

2003 ◽  
Author(s):  
Hideyuki Ogawa ◽  
Noboru Miyamoto ◽  
Naoya Kaneko ◽  
Hirokazu Ando
Keyword(s):  
Low Temperature ◽  
Range Expansion ◽  
Combustion Control ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Operating Range ◽  
Hcci Engine ◽  
Oxidation Characteristics

Combustion control and operating range expansion in an homogeneous charge compression ignition engine with direct in-cylinder injection of reaction inhibitors

2005 ◽  
Vol 6 (4) ◽  
pp. 341-359 ◽  
Author(s):  
H Ogawa ◽  
N Miyamoto ◽  
N Kaneko ◽  
H Ando
Keyword(s):  
Low Temperature ◽  
Homogeneous Charge Compression Ignition ◽  
Water Injection ◽  
Combustion Efficiency ◽  
Compression Ignition ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Operating Range ◽  
Rapid Combustion ◽  
Charge Temperature

Light naphtha, which exhibits two-stage ignition, was induced from the intake manifold and water or a low-ignitability fuel, which does not exhibit low temperature oxidation, was directly injected early in the compression stroke for ignition suppression in an homogeneous charge compression ignition (HCCI) engine. Their quantitative balance was flexibly controlled to optimize ignition timing according to operating conditions. Ultra-low NOx and smokeless combustion without knocking or misfiring was realized over a wide operating range with water or alcohol injection. The water injection significantly reduced the low-temperature oxidation, which suppressed the increase in charge temperature and the rapid combustion caused by the high-temperature oxidation. Rapid combustion was suppressed by reductions in the maximum in-cylinder gas temperature due to water injection while the combustion efficiency suffered. Therefore, the maximum charge temperature needs to be controlled within an extremely limited range to maintain a satisfactory compromise between mild combustion and high combustion efficiency. Alcohols inhibit low-temperature oxidation more strongly than other oxygenated or unoxygenated hydrocarbons, water, and hydrogen. Chemical kinetic modelling with methanol showed a reduction of OH radical before the onset of low-temperature oxidation, and this may be the main mechanism by which alcohols inhibit low-temperature oxidation.

scholarly journals Influence of Intake Air Pressure and Equivalence Ratio on Low-Temperature Oxidation Reactions and Combustion in an HCCI Engine

2016 ◽  
Vol 95 (1) ◽  
pp. 139-143
Author(s):  
Munehiro MATSUISHI ◽  
Yasuhide ABE ◽  
Akira IIJIMA ◽  
Hideo SHOJI ◽  
Kazuhito MISAWA ◽  
...  
Keyword(s):  
Low Temperature ◽  
Equivalence Ratio ◽  
Air Pressure ◽  
Oxidation Reactions ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Hcci Engine

Integrative Investigation of Low-Temperature Oxidation Characteristics and Mechanisms of Heavy Crude Oil

2019 ◽  
Vol 58 (31) ◽  
pp. 14595-14602 ◽  
Author(s):  
Shuai Zhao ◽  
Wanfen Pu ◽  
Mikhail A. Varfolomeev ◽  
Chengdong Yuan ◽  
Alexander A. Rodionov
Keyword(s):  
Low Temperature ◽  
Crude Oil ◽  
Heavy Crude Oil ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Oxidation Characteristics ◽  
Heavy Crude

Low-Temperature Oxidation Characteristics and Its Effect on the Critical Coking Temperature of Heavy Oils

2015 ◽  
Vol 29 (2) ◽  
pp. 538-545 ◽  
Author(s):  
Liang Zhang ◽  
Junyu Deng ◽  
Lei Wang ◽  
Zhenya Chen ◽  
Shaoran Ren ◽  
...  
Keyword(s):  
Low Temperature ◽  
Heavy Oils ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Oxidation Characteristics
Sign in / Sign up

Export Citation Format

Share Document