A Methodology for Cycle-By-Cycle Transient Heat Release Analysis in a Turbocharged Direct Injection Diesel Engine

2000 ◽  
Author(s):  
Dennis N. Assanis ◽  
Zoran Filipi ◽  
Scott B. Fiveland ◽  
Michalis Syrimis
Keyword(s):  
Diesel Engine ◽  
Heat Release ◽  
Direct Injection ◽  
Direct Injection Diesel Engine ◽  
Release Analysis

Determination of the Start and End of Combustion in a Direct Injection Diesel Engine Using the Apparent Heat Release Rate

2017 ◽  
Author(s):  
Joseph Gerard T. Reyes ◽  
Edwin N. Quiros
Keyword(s):  
Diesel Engine ◽  
Heat Release ◽  
Heat Release Rate ◽  
Release Rate ◽  
Direct Injection ◽  
Injection Timing ◽  
Fuel Injector ◽  
Direct Injection Diesel Engine ◽  
Crank Angle ◽  
Start Of Combustion

The combustion duration in an internal combustion engine is the period bounded by the engine crank angles known as the start of combustion (SOC) and end of combustion (EOC), respectively. This period is essential in analysis of combustion for the such as the production of exhaust emissions. For compression-ignition engines, such as diesel engines, several approaches were developed in order to approximate the crank angle for the start of combustion. These approaches utilized the curves of measured in-cylinder pressures and determining by inspection the crank angle where the slope is steep following a minimum value, indicating that combustion has begun. These pressure data may also be utilized together with the corresponding cylinder volumes to generate the apparent heat release rate (AHRR), which shows the trend of heat transfer of the gases enclosed in the engine cylinder. The start of combustion is then determined at the point where the value of the AHRR is minimum and followed by a rapid increase in value, whereas the EOC is at the crank angle where the AHRR attains a flat slope prior to the exhaust stroke of the engine. To verify the location of the SOC, injection line pressures and fuel injection timing are also used. This method was applied in an engine test bench using a four-cylinder common-rail direct injection diesel engine with a pressure transducer installed in the first cylinder. Injector line pressures and fuel injector voltage signals per engine cycle were also recorded and plotted. By analyzing the trends of this curves in line with the generated AHRR curves, the SOC may be readily determined.

scholarly journals Simulation and experimental coupled research of rate of heat release in DI diesel engine for various injection strategies

2008 ◽  
Vol 132 (1) ◽  
pp. 17-24
Author(s):  
Kazimierz LEJDA ◽  
Paweł WOŚ
Keyword(s):  
Diesel Engine ◽  
Heat Release ◽  
Direct Injection ◽  
Injection System ◽  
Common Rail Injection System ◽  
Common Rail Injection ◽  
Release Analysis ◽  
Di Diesel Engine ◽  
Rate Of Heat Release ◽  
Injection Strategies

In the paper the rate of heat release analysis in direct injection diesel engine has been presented and discussed. The research has been carried out for two different injection strategies, i.e. for conventional single-phase injection and for triple-phase injection executed by a Common Rail injection system. The calculation methodology of heat release rate based on indicator diagram has been presented as well.

scholarly journals Effect of Various Supercharger Boost Pressure to in-Cylinder Pressure and Heat Release Rate Characteristics of Direct Injection Diesel Engine at Various Engine Rotation

2019 ◽  
Vol 130 ◽  
pp. 01036
Author(s):  
Willyanto Anggono ◽  
Wataru Ikoma ◽  
Haoyu Chen ◽  
Zhiyuan Liu ◽  
Mitsuhisa Ichiyanagi ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Heat Release ◽  
Heat Release Rate ◽  
Release Rate ◽  
Power Efficiency ◽  
Direct Injection ◽  
Boost Pressure ◽  
Cylinder Pressure ◽  
Stroke Length ◽  
Direct Injection Diesel Engine

The diesel engines are superior in terms of power efficiency and fuel economy compared to gasoline engines. In order to optimize the performance of direct injection diesel engine, the effect of various intake pressure (boost pressure) from supercharging direct injection diesel engine was studied at various engine rotation. A single cylinder direct injection diesel engine was used in this experiment. The bore diameter of the engine used was set to 85 mm, the stroke length was set to 96.9 mm, and the compression ratio was set to 16.3. The variation of engine rotation started from 800 rpm to 2 000 rpm with 400 rpm increment. The variation of boost pressure is bounded from 0 kPa boost pressure (naturally aspirated) to the maximum of 60 kPa boost pressure with 20 kPa boost pressure increment. The performance of the engine is evaluated in terms of in-cylinder pressure and heat release rate as the most important performance characteristics of the diesel engine. The in-cylinder pressure and heat release rate of direct injection diesel engine are increased with the elevation of boost pressure at various engine rotation. The raise of engine rotation resulted in the decrease of maximum in-cylinder pressure and heat release rate.

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