Direct Injection Diesel Engine Cylinder Pressure Modelling via NARMA Identification Technique

Acoustic noise emitted by a diesel engine generally exceeds that produced by its spark-ignited equivalent and may hinder the acceptance of this more efficient engine type in the passenger car market (1). This work characterizes the combustion noise from a single-cylinder direct-injection diesel engine and examines the degree to which it may be minimized by optimal choice of injection parameters. The relative contribution of motoring, combustion and resonance components to overall engine noise are determined by decomposition of in-cylinder pressure traces over a range of load, injection pressure and start of injection. The frequency spectra of microphone signals recorded external to the engine are correlated with those of in-cylinder pressure traces. Short Time Fourier Transformation (STFT) is applied to cylinder pressure traces to reveal the occurrence of motoring, combustion noise and resonance in the frequency domain over the course of the engine cycle. Loudness is found to increase with enhanced resonance, in proportion to the rate of cylinder pressure rise and under conditions of high injection pressure, load and advanced injection timing.

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Development of engine control using the in-cylinder pressure signal in a high speed direct injection diesel engine

International Journal of Automotive Technology ◽

10.1007/s12239-013-0019-x ◽

2013 ◽

Vol 14 (2) ◽

pp. 175-182 ◽

Cited By ~ 19

Author(s):

S. Yu ◽

H. Choi ◽

S. Cho ◽

K. Han ◽

K. Min

Keyword(s):

Diesel Engine ◽

High Speed ◽

Direct Injection ◽

Engine Control ◽

Cylinder Pressure ◽

Pressure Signal ◽

Direct Injection Diesel Engine

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Development of Engine Control Using the In-Cylinder Pressure Signal in a High Speed Direct Injection Diesel Engine

10.4271/2011-01-1418 ◽

2011 ◽

Cited By ~ 4

Author(s):

Seongeun Yu ◽

Han Ho Song ◽

Kyoungdoug Min ◽

Hoimyung Choi ◽

Sunghwan Cho ◽

...

Keyword(s):

Diesel Engine ◽

High Speed ◽

Direct Injection ◽

Engine Control ◽

Cylinder Pressure ◽

Pressure Signal ◽

Direct Injection Diesel Engine

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

E3S Web of Conferences ◽

10.1051/e3sconf/201913001036 ◽

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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Real-Time IMEP Estimation and Control Using an In-Cylinder Pressure Sensor for a Common-Rail Direct Injection Diesel Engine

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.4002250 ◽

2011 ◽

Vol 133 (6) ◽

Cited By ~ 11

Author(s):

Seungsuk Oh ◽

Junsoo Kim ◽

Byounggul Oh ◽

Kangyoon Lee ◽

Myoungho Sunwoo

Keyword(s):

Diesel Engine ◽

Real Time ◽

Direct Injection ◽

Common Rail ◽

Cylinder Pressure ◽

Pressure Data ◽

Direct Injection Diesel Engine ◽

Crank Angle ◽

Estimation And Control ◽

And Control

An in-cylinder pressure-based control method is capable of improving engine performance, as well as reducing harmful emissions. However, this method is difficult to be implemented in a conventional engine management system due to the excessive data acquisition and long computation time. In this study, we propose a real-time indicated mean effective pressure (IMEP) estimation method using cylinder pressure in a common-rail direct injection diesel engine. In this method, difference pressure integral (DPI) was applied to the estimation. The DPI requires only 180 pressure data points during one engine cycle from top dead center to bottom dead center when pressure data are captured at every crank angle. Therefore, the IMEP can be estimated in real time. To further reduce the computational load, the IMEP was also estimated using DPI at 2 deg, 3 deg, and 4 deg crank angle resolutions. Furthermore, based on the estimated IMEP, we controlled IMEP using a radial basis function network and linear feedback controller. As a result of the study, successful estimation and control were demonstrated through engine experiments.

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