Optimization of Hydrogen Jet Configuration by Single Hole Nozzle and High Speed Laser Shadowgraphy in High Pressure Direct Injection Hydrogen Engines

2011 ◽  
Author(s):  
Masakuni Oikawa ◽  
Yusuke Ogasawara ◽  
Yoshikazu Kondo ◽  
Kanan Sekine ◽  
Kaname Naganuma ◽  
...  
Keyword(s):  
High Pressure ◽  
High Speed ◽  
Direct Injection ◽  
Single Hole ◽  
Hydrogen Engines

scholarly journals Optimization of Hydrogen Jet Configuration by Single Hole Nozzle and High Speed Laser Shadowgraphy in High Pressure Direct Injection Hydrogen Engines

2012 ◽  
Vol 3 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Masakuni Oikawa ◽  
Yusuke Ogasawara ◽  
Yoshikazu Kondo ◽  
Kanan Sekine ◽  
Yasuo Takagi ◽  
...  
Keyword(s):  
High Pressure ◽  
High Speed ◽  
Direct Injection ◽  
Single Hole ◽  
Hydrogen Engines

Detecting and Correcting Cylinder Imbalance in Direct Injection Engines

2000 ◽  
Vol 123 (3) ◽  
pp. 413-424 ◽  
Author(s):  
M. J. van Nieuwstadt ◽  
I. V. Kolmanovsky
Keyword(s):  
High Pressure ◽  
Diesel Engine ◽  
High Speed ◽  
Fuel Injection ◽  
Direct Injection ◽  
Direct Injection Engines ◽  
High Speed Diesel ◽  
On Line ◽  
Manufacturing Accuracy ◽  
Adaptation Scheme

Modern direct injection engines feature high pressure fuel injection systems that are required to control the fuel quantity very accurately. Due to limited manufacturing accuracy these systems can benefit from an on-line adaptation scheme that compensates for injector variability. Since cylinder imbalance affects many measurable signals, different sensors and algorithms can be used to equalize torque production by the cylinders. This paper compares several adaptation schemes that use different sensors. The algorithms are evaluated on a cylinder-by-cylinder simulation model of a direct injection high speed diesel engine. A proof of stability and experimental results are reported as well.

scholarly journals Reduction in NOx Formation by Ignition-combustion of Rich Mixture Plume in High Pressure Direct Injection Hydrogen Engines

2012 ◽  
Vol 47 (3) ◽  
pp. 429-436
Author(s):  
Masakuni Oikawa ◽  
Yusuke Ogasawara ◽  
Yoshikazu Kondo ◽  
Kanan Sekine ◽  
Yasuo Takagi ◽  
...  
Keyword(s):  
High Pressure ◽  
Direct Injection ◽  
Nox Formation ◽  
Rich Mixture ◽  
Hydrogen Engines

Analysis of the effect of variations in fuel line pressure in high-speed direct injection diesel engines, with high-pressure common rail fuel injection systems on heat release, cylinder pressure, performance, and NOx emissions

2005 ◽  
Vol 219 (3) ◽  
pp. 413-422 ◽  
Author(s):  
F J Wallace ◽  
J G Hawley
Keyword(s):  
High Pressure ◽  
Heat Release ◽  
Diesel Engines ◽  
High Speed ◽  
Fuel Injection ◽  
Direct Injection ◽  
Common Rail ◽  
Injection Velocity ◽  
Engine Simulation ◽  
High Pressure Common Rail

This paper is a further development of work previously reported on a wholly analytical approach to heat release modelling and is applicable to high-speed direct injection (HSDI) diesel engines operating with high-pressure common rail fuel injection systems under conditions of predominantly mixing-controlled combustion. The key variable in this treatment is the fuel preparation or combustion rate factor WH which, in conjunction with the primary injection variables, i.e. rail pressure, injection velocity and duration, defines the shape and amplitude of the heat release curve. It was shown in a previous paper that by expressing the fuel preparation rate factor WH as a function of time rather than crank angle, i.e. WHt instead of WHθ, the former can be presented as a nearly linear function of the square of injection velocity, i.e. WHt is directly proportional to the kinetic energy of the injected fuel spray, the latter evidently being the primary influence on the rate of the fuel-air mixing process. The analytical treatment developed in the authors' previous paper then allows heat release rates in the engine, dQ/dθ, to be calculated over a wide range of engine speeds and loads, with the aid of the existing engine simulation code ODES (Otto diesel engine simulation) to predict the associated engine performance and emissions, without resorting to further engine testing.

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