The Measurement of Air Velocity in a Motored Internal Combustion Engine Using a Hot-Wire Anemometer

1970 ◽  
Vol 185 (1) ◽  
pp. 583-591 ◽  
Author(s):  
H. Hassan ◽  
J. C. Dent
Keyword(s):  
Fixed Point ◽  
Internal Combustion Engine ◽  
Constant Temperature ◽  
Compression Ratio ◽  
Engine Speed ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Hot Wire ◽  
Gas Velocity ◽  
Air Velocity

The application of the constant temperature hot-wire anemometer to the measurement of instantaneous gas velocity in the pre-chamber of a motored I.C. engine is shown to be possible. The correction of the anemometer output to allow for the operation of the wire at conditions greatly removed from those of a windtunnel calibration are discussed. The variation of gas velocity at a fixed point in the pre-chamber with variation of engine compression ratio and engine speed was studied.

Effects of Compression Ratio on Performance and Emission of Internal Combustion Engine with Used Vegetable Oil Methyl Easter

2013 ◽  
Vol 768 ◽  
pp. 250-254
Author(s):  
N. Balakrishnan ◽  
K. Mayilsamy ◽  
N. Nedunchezhian
Keyword(s):  
Internal Combustion Engine ◽  
Vegetable Oil ◽  
Compression Ratio ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Maximum Pressure ◽  
Base Line ◽  
Promising Alternative ◽  
Performance And Emission ◽  
Used Vegetable Oil

Biomass derived vegetable oil is a promising alternative fuel for an internal combustion engine. Direct use of vegetable oil has inferior performance with higher emission due to its higher viscous in nature. This can be overcome by transesterification process with its byproduct which is called as used vegetable oil methyl ester. While blending this biodiesel with fossil diesel upto maximum of 30:70, will give the higher performance and lower emission than the fossil diesel alone. In this present study biodiesel in the form of B23 is used in a four stroke water cooled variable compression ratio engine without any modifications. The performance and emission characteristics are studied with different compression ratio and compared with a base line fossil diesel mode operation. This study reveals that the compression ratio of 18 is the optimum in the view of ignition delay, maximum pressure crank angle, exhaust gas temperature and Smoke emission.

Improved Cleaning of the Engine Cylinder from the Exhaust Gas Using the Active Ejection in the Exhaust Tract

2015 ◽  
Vol 792 ◽  
pp. 553-558
Author(s):  
Leonid Plotnikov ◽  
Boris Zhilkin ◽  
Yuriy Brodov
Keyword(s):  
Experimental Study ◽  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Exhaust Gas ◽  
Gas Velocity ◽  
Engine Cylinder ◽  
Angle Of Rotation

The results of experimental study of the exhaust process of the piston internal combustion engine are presented in the article. A method for improving the cleaning of the cylinder from the exhaust gas on the basis of the effect the ejection is proposed in the paper. Dependences of change of the instantaneous gas velocity on the angle of rotation of the crankshaft in the exhaust tract of a different configuration (with ejector and without it) are listed in the article.

The effect of engine speed and cylinder-to-cylinder variations on backfire in a hydrogen-fueled internal combustion engine

2019 ◽  
Vol 44 (39) ◽  
pp. 22223-22230 ◽  
Author(s):  
Cheolwoong Park ◽  
Yongrae Kim ◽  
Young Choi ◽  
Jeongwoo Lee ◽  
Byeungjun Lim
Keyword(s):  
Internal Combustion Engine ◽  
Engine Speed ◽  
Combustion Engine ◽  
Internal Combustion

A comparative study of turbulent velocity fields in an internal combustion engine with shrouded valve and flat/bowl piston configurations

2007 ◽  
Vol 221 (12) ◽  
pp. 1597-1607 ◽  
Author(s):  
A Erdil ◽  
A Kodal
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Engine Performance ◽  
Internal Combustion ◽  
Velocity Fields ◽  
Turbulent Velocity ◽  
Energy Spectra ◽  
Hot Wire ◽  
Phase Average ◽  
Proper Orthogonal

In the current study, the phase averaging and the proper orthogonal decomposition (POD) methods are used to decompose experimentally measured turbulent velocity fields in an internal combustion engine. Radial and circumferential turbulent velocity fields were measured using hot wire anemometer under motoring conditions for both flat and bowl piston configurations. Decomposed results of the phase average and POD methods are compared with each other. The effects of piston configuration on the engine performance have been discussed. Also, obtained organized and turbulence motions and their energy spectra are examined. Finally, coherent structures of velocity fields and their activities are investigated.

Design of a Model-Reference Adaptive Control for an Internal Combustion Engine

1973 ◽  
Vol 6 (4) ◽  
pp. 167-173 ◽  
Author(s):  
G. E. Harland ◽  
K. F. Gill
Keyword(s):  
Adaptive Control ◽  
Control System ◽  
Internal Combustion Engine ◽  
Engine Speed ◽  
Dynamic Behaviour ◽  
Combustion Engine ◽  
Speed Control ◽  
Internal Combustion ◽  
Model Reference ◽  
Model Reference Adaptive

An internal combustion engine speed control system has been investigated to determine the possibility of using a model-reference adaptive control device to maintain constant dynamic behaviour of engine speed irrespective of engine load and environmental conditions. A conventional type of speed control arrangement has been used in the primary loop and an auxiliary loop has been introduced which biases the engine throttle mechanism by an amount which is proportional to the derivative of engine speed. The constant of proportionality is the parameter which is being changed by the adaptive loop. The results of the engine tests showed good correlation with those obtained in a simulation study and clearly showed that for certain installations the incorporation of a model-reference loop into a conventional speed control system would result in improved engine dynamic behaviour.

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