Zobrazeno 1 - 10
of 122
pro vyhledávání: '"Wai K. Cheng"'
Autor:
Wai K. Cheng, Justin E. Ketterer
Publikováno v:
Prof. Cheng via Elizabeth Soergel
The soot yield, defined as the ratio of the soot mass to the carbon mass in the fuel, for the homogeneous combustion of a rich fuel-air mixture has been measured in a rapid compression machine using the laser light extinction method. The temperature
Publikováno v:
Combustion and Flame. 178:268-276
Gasoline Compression Ignition (GCI) is a promising engine operating mode that can reduce maximum pressure rise rate (MPRR) without knock tendency and better control the combustion phasing compared to the Homogeneous Charge Compression Ignition (HCCI)
Autor:
J. Felipe Rodriguez, Wai K. Cheng
Publikováno v:
Cheng
The NOx emissions during the crank-start and cold fast-idle phases of a GDI engine are analyzed in detail. The NOx emissions of the first 3 firing cycles are studied under a wide set of parameters including the mass of fuel injected, start of injecti
Autor:
J. Felipe Rodriguez, Wai K. Cheng
Publikováno v:
Rodriguez
The first 3 cycles in the cold crank-start process at 20°C are studied in a GDI engine. The focus is on the dependence of the HC and PM/PN emissions of each cycle on the injection strategy and combustion phasing of the current and previous cycles. T
Autor:
Wai K. Cheng, J. Felipe Rodriguez
Publikováno v:
Rodriguez
The fuel carbon pathway for the cold-start first cranking cycle in a gasoline direct injection engine is characterized quantitatively. The engine is fired for a single cycle in one cylinder at a specified cranking speed and at a coolant temperature o
Publikováno v:
Prof. Cheng via Elizabeth Soergel
The spark ignition engine particulate number (PN) emissions have been correlated to a particulate matter index (PMI) in the literature. The PMI value addresses the fuel effect on PN emission through the individual fuel species reactivity and vapor pr
Autor:
Muthu Anandhan, Wai K. Cheng
Publikováno v:
SAE Technical Paper Series.
Autor:
Wai K. Cheng, J. Felipe Rodriguez
Publikováno v:
Rodriguez
This paper reports on the potential of negative valve overlap for improving the net indicated thermal efficiency of gasoline engines during part load. Three fixed fuel flow rates, resulting in indicated mean effective pressures of up to 6 bar, were i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::282d3c5c5eccd249660b44e79b662221
https://orcid.org/0000-0002-5879-2253
https://orcid.org/0000-0002-5879-2253
Autor:
Jan H. Baron, Wai K. Cheng
Publikováno v:
Prof. Cheng via Elizabeth Soergel
The effect of back pressure on the light-off of a modern spark ignition engine 3-way catalyst has been assessed by measuring The effect of back pressure on the light-off of a modern spark ignition engine 3-way catalyst has been assessed by measuring
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36cd532807f536e188eaddd687f39f95
https://hdl.handle.net/1721.1/121572
https://hdl.handle.net/1721.1/121572
Autor:
Wai K. Cheng, Joseph Pritchard
Publikováno v:
Prof. Cheng via Angie Locknar
The effects of secondary air on the exhaust oxidation of particulate matters (PM) have been assessed in a direct-injection-spark-ignition engine under fuel rich fast idle condition (1200 rpm; 2 bar NIMEP). Substantial oxidation of the unburned feed g