Direct Estimation of Cyclic Combustion Pressure Variability Using Engine Speed Fluctuations in an Internal Combustion Engine

1994 ◽  
Author(s):  
Francis T. Connolly
Keyword(s):  
Internal Combustion Engine ◽  
Engine Speed ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Combustion Pressure ◽  
Direct Estimation ◽  
Speed Fluctuations

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.

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

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.

The Turbocharger Exhaust Gas Regulator Design and Analysis

2014 ◽  
Vol 644-650 ◽  
pp. 485-488
Author(s):  
Li Jun Qiu ◽  
Su Ying Xu
Keyword(s):  
Internal Combustion Engine ◽  
Gas Flow ◽  
Engine Speed ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Exhaust Gas ◽  
Waste Gas ◽  
Rotating Blade ◽  
Gas Flow Velocity ◽  
The Way

In order to adapt to the needs of internal combustion engine speed variation of the turbocharger. Using waste gas regulator control exhaust gas inlet device. The effect of exhaust gas regulator is for adjusting the gas flow velocity and direction. When the internal combustion engine running at low speed raising the impeller speed. Exhaust gas regulator and axial moving blades rotating blades of two kinds of structure. The axial moving blade structure is changing the way nozzle ring opening work. Rotating blade structure is working on changing the way of blade Angle. Exhaust gas to adjust the turbocharger is a control of internal combustion engine air pressurization value of the speed changes.

The Effects of Backpressure on the Performance of Internal Combustion Engine and Automobile Exhaust Thermoelectric Generator

2022 ◽  
pp. 1-27
Author(s):  
Rui Quan ◽  
Yousheng Yue ◽  
Zikang Huang ◽  
Yufang Chang ◽  
Yadong Deng
Keyword(s):  
Heat Exchanger ◽  
Pressure Drop ◽  
Internal Combustion Engine ◽  
Thermoelectric Generator ◽  
Engine Speed ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Automobile Exhaust ◽  
Automobile Exhaust Thermoelectric Generator ◽  
Co Emission

Abstract The maximum generated power of automobile exhaust thermoelectric generator (AETEG) can be enhanced by applying inserted fins to its heat exchanger, for the temperature difference of thermoelectric modules (TEMs) is increased. However, the heat exchanger will result in undesired backpressure, which may deteriorate the performance of the internal combustion engine (ICE). To evaluate the backpressure on the performance of both the ICE and the AETEG, the model of ICE integrated with AETEG was established with the GT-power software and validated with the AETEG test bench. The heat exchangers with chaos shape and fishbone shape were proposed, their pressure drop with different engine speeds was studied, and their effects on the performance of both the AETEG and the ICE were analyzed. The results showed that compared with the fishbone-shaped structure, the pressure drop of chaos-shaped heat exchanger is larger at the same engine speed, which contributes to the increased maximum power and hot side temperature of the AETEG. Moreover, compared with the ICE without heat exchanger, the brake torque, brake power, volumetric efficiency and pumping mean effective pressure of the ICE assembled with chaos-shape and fishbone-shape heat exchanger reduce, and the corresponding brake specific fuel consumption, CO emission and CO2 emission increase because of the raised backpressure caused by the heat exchanger.

Experimental Research on a Three-Dimensional Journal Orbit of a Crankshaft Bearing for an Internal Combustion Engine

2014 ◽  
Vol 136 (3) ◽  
Author(s):  
Jun Sun ◽  
Xinlong Zhu ◽  
Liang Zhang ◽  
Xianyi Wang ◽  
Xiaohui Chai ◽  
...  
Keyword(s):  
Internal Combustion Engine ◽  
Cross Section ◽  
Engine Speed ◽  
Combustion Engine ◽  
Axial Direction ◽  
Internal Combustion ◽  
Operating Cycle ◽  
Axial Movement ◽  
Crankshaft Journal ◽  
The Cross

The current experimental researches on the orbit of a journal center of a crankshaft bearing for an internal combustion engine were usually focused on the 2D movement locus of a crankshaft journal center in the cross section of the bearing. However, in the actual operation of an internal combustion engine, there exists the movement of a crankshaft journal along the bearing axis under the effect of various factors, such as the crankshaft deformation acted by load. Obviously the tribological performance of a crankshaft bearing is affected inevitably by the movement of the crankshaft journal along the bearing axis. In this paper, a four-stroke four-cylinder internal combustion engine was taken as the studying object, the 3D orbit (that includes the movement in the cross section of the bearing and the movement along the bearing axis) of the journal center of the crankshaft bearing for an internal combustion engine was measured under a number of operating conditions on the test bench of an internal combustion engine. The position of the journal in the crankshaft bearing was obtained by the measurement using eddy current gap sensors and the data post-process. The results show that there exists the movement of the crankshaft journal along the axial direction in the bearing for an internal combustion engine. The actual orbit of the journal center of the crankshaft bearing for an internal combustion engine is a 3D spatial curve. The orbit of the journal center of the crankshaft bearing in one operating cycle of an internal combustion engine is not a closed curve. There is relatively a large movement of the journal along the axial direction of the crankshaft bearing, and the numerical value of the movement is greater than the radial clearance of the bearing. The greater the rotational speed of the internal combustion engine, the larger the amount of axial movement of the journal. The periodic variation exists in the axial movement of the bearing journal in one operating cycle of the internal combustion engine at low engine speed, and the varying periodicity equals the number of engine cylinders. There is no obvious varying rule of the axial movement of the bearing journal in one operating cycle of the internal combustion engine at high engine speed.

scholarly journals The Acoustic Spectrums of the Combustion Process in the IC-Engines

2018 ◽  
Vol 209 ◽  
pp. 00026
Author(s):  
Ramil Shaymukhametov ◽  
Vladimir Strekalov
Keyword(s):  
Internal Combustion Engine ◽  
Engine Speed ◽  
Acoustic Noise ◽  
Combustion Engine ◽  
Combustion Process ◽  
Internal Combustion ◽  
Petrol Engine ◽  
Fourier Spectroscopy ◽  
Physical Processes ◽  
Ic Engines

The results of the Fourier spectroscopy of the acoustic noise of an internal combustion engine are presented. The sound was recorded using a voice recorders placed near the four-cylinder petrol engine. The engine speed was set to the fixed values from 900 to 3000 rpm. The distinctive characteristics of the periodograms where associated with the certain physical processes in the engine.

scholarly journals MODELING OF THE PROCESS OF ELECTROMECHANICAL CONTROL OF GAS DISTRIBUTION OF AN ELECTRIC ENERGY GENERATOR WITH AN INTERNAL COMBUSTION ENGINE

2021 ◽  
pp. 51-58
Author(s):  
S. Zaichenko ◽  
S. Korol ◽  
V. Opryshko ◽  
D. Derevyanko ◽  
N. Zhukova
Keyword(s):  
Internal Combustion Engine ◽  
Engine Speed ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Optimal Operation ◽  
Intake Manifold ◽  
Exhaust Pipe ◽  
Gas Distribution ◽  
Exhaust Gases ◽  
Opening And Closing

The use of generators at different load levels allows you to use part of the rated power of the engines, by reducing the speed of the internal combustion engine, thus reducing fuel consumption and increase the overall efficiency of the system as a whole. However, it should be noted that the optimal operation of the internal combustion engine at fixed gas distribution parameters is possible only at a certain engine speed. Reducing the engine speed leads to a deterioration of the filling of the fuel-air mixture and the release of exhaust gases from the engine, accompanied by the intake of exhaust gases into the intake manifold and the emission of part of the fuel mixture into the exhaust pipe. The paper presents the results of the study of generator parameters and the general concept of creating an autonomous power supply control system based on an internal combustion engine in order to reduce the specific indicators of electricity generation. The expediency of regulating the power level of an internal combustion engine has been experimentally proved. To achieve this goal, it is proposed to adjust the opening and closing angles of the internal combustion engine with a solenoid valve. The use of this system allows to reduce the specific costs by more than 4 times when generating electricity with low generator load. Based on the phase distribution diagram of the internal combustion engine, the dependence of the change of the opening and closing angles of the inlet and outlet valves on the power of the autonomous energy source is proposed.

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