Cold Startability of Open-Chamber Direct-Injection Diesel Engines-Part I I: Combustion Chamber Design and Fuel Spray Geometry and Additional Air and Glow Plug as a Starting Aid

1983 ◽  
Author(s):  
Ramkrishna Phatak ◽  
Tadao Nakamura
Keyword(s):  
Combustion Chamber ◽  
Diesel Engines ◽  
Direct Injection ◽  
Fuel Spray ◽  
Glow Plug ◽  
Chamber Design

scholarly journals Influence of spray-glow plug configuration on cold start combustion for high-speed direct injection diesel engines

Energy ◽  
2011 ◽  
Vol 36 (9) ◽  
pp. 5486-5496 ◽  
Author(s):  
J.V. Pastor ◽  
V. Bermúdez ◽  
J.M. García-Oliver ◽  
J.G. Ramírez-Hernández
Keyword(s):  
Diesel Engines ◽  
High Speed ◽  
Direct Injection ◽  
Cold Start ◽  
Glow Plug

Combustion chamber resonances in direct injection automotive diesel engines: A numerical approach

2004 ◽  
Vol 5 (1) ◽  
pp. 83-91 ◽  
Author(s):  
A. J. Torregrosa ◽  
A Broatch ◽  
X Margot ◽  
V Marant ◽  
Y Beauge
Keyword(s):  
Combustion Chamber ◽  
Diesel Engines ◽  
Direct Injection ◽  
Numerical Approach

Study on the Fuel Spray and Combustion of the Variable Orifice Nozzle (VON) for Direct Injection Diesel Engines

2000 ◽  
Author(s):  
Toshiyuki Hasegawa ◽  
Hayato Maehara ◽  
Ryosuke Tanishige ◽  
Takao Iwasaki ◽  
Takashi Kobayashi ◽  
...  
Keyword(s):  
Diesel Engines ◽  
Direct Injection ◽  
Fuel Spray

Penetration and Vaporization of Diesel Fuel Sprays

1969 ◽  
Vol 184 (10) ◽  
pp. 147-170 ◽  
Author(s):  
R. Burt ◽  
K. A. Troth
Keyword(s):  
Combustion Chamber ◽  
Diesel Engines ◽  
Direct Injection ◽  
Combustion Process ◽  
Major Effect ◽  
Engine Fuel ◽  
Liquid Droplets ◽  
Fuel Sprays ◽  
Air Movement ◽  
Air Mixing

In the diesel engine, fuel is injected into the hot, compressed air in the combustion chamber. Thus the process of diesel combustion is essentially inhomogeneous, and the mixing of the fuel and air in the combustion chamber dominates the whole combustion process. Since fuel–air mixing is so important the distribution of the injected fuel has a major effect on combustion performance. This is particularly true of direct-injection diesel engines which have relatively low rates of air movement. In all diesel engines, fuel is injected into the combustion chamber at high pressure through small nozzles. The high-velocity liquid jet atomizes, after emerging from the nozzle, into a spray of liquid droplets. The penetration, distribution, and vaporization of the sprays, together with the air movement, govern the mixing of fuel and air. The penetration of fuel sprays is dealt with in Part 1 of the paper; Part 2 describes a study of the vaporization of fuel sprays.

Ignition by Shielded Glow Plug in Natural Gas Fueled Direct Injection Engines

2011 ◽  
Author(s):  
Mark Fabbroni ◽  
James S. Wallace
Keyword(s):  
Diesel Engine ◽  
Natural Gas ◽  
Combustion Chamber ◽  
Heated Surface ◽  
Direct Injection ◽  
Cylinder Wall ◽  
Fuel Utilization ◽  
Direct Injection Engines ◽  
Glow Plug ◽  
Gas Jets

Injected natural gas requires some form of ignition assist in order to ignite in the time available in a diesel engine combustion chamber. A glow plug — a heated surface — is one form of ignition assist. Ignition by glow plug results in a single site of ignition from which the flame must propagate to other jets in the ignition pattern. The goal of this work was to determine what factors affect how the flame propagates from this initial ignition site to the remaining unburned mixture. The combustion of natural gas jets under diesel engine conditions was studied over a range of temperatures with a glow plug shield using a CFR engine as a rapid compression device. The results showed that of all the factors considered it is the inter-related geometries of the injection pattern, combustion chamber, and glow plug shield that are most dominant in controlling combustion rates and fuel utilization, because those factors determine the distribution of fuel in the combustion chamber. Ignition of adjacent gas jets requires a flammable path between jets, which is achieved: 1) through mixing between the entrainment regions of adjacent jets and 2) through mixing along the cylinder wall of adjacent jets that are spreading along the wall. Ignition by either of both of these pathways can provide high fuel utilization and combustion rates and low combustion variability. Autoignition of an adjacent jet due to heat release from ignition of the first jet was not observed in these experiments with two jets.

Research and development of an advanced combustion system for the direct injection diesel engine

2005 ◽  
Vol 219 (2) ◽  
pp. 241-252 ◽  
Author(s):  
W H Su ◽  
T J Lin ◽  
H Zhao ◽  
Y Q Pei
Keyword(s):  
Diesel Engine ◽  
Combustion Chamber ◽  
Direct Injection ◽  
Combustion System ◽  
Multiple Injections ◽  
Hcci Combustion ◽  
Advanced Combustion ◽  
Chamber Design ◽  
Low Load ◽  
Di Diesel Engine

In order to obtain a simultaneous reduction in both NOx and particulate emissions from a direct injection (DI) diesel engine, an advanced combustion system has been researched and developed in the authors' laboratory. The new combustion system comprises homogeneous charge compression ignition (HCCI) combustion at low load by early and multiple injections, combined HCCI, and lean diffusion burning at medium and higher load conditions by means of a novel combustion chamber design and multiple injections. In this paper, the research and development of the enhanced mixing by means of a raised round object (referred to in this paper as BUMP) and its application to a diesel combustion chamber design is described. Then the experimental results from a DI diesel engine equipped with a multiple injection common rail (CR) fuel injection system and the new combustion chamber design will be presented and discussed. Engine testing has shown that the BUMP combustion chamber was very effective in reducing both NOx and smoke emissions. HCCI combustion by means of multiple injections leads to extremely low NOx emissions under low load operations. At medium and higher load operation conditions, quasi HCCI combustion combined with the BUMP combustion chamber could signficantly reduce NOx emissions without sacrificing particulate emission and fuel consumption.

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