Development of Combustion Behavior Analysis Techniques in the Ultra High Engine Speed Range

2007 ◽  
Author(s):  
Takehiko Kato ◽  
Kiyokazu Akiyama ◽  
Tatsushi Nakashima ◽  
Rio Shimizu
Keyword(s):  
Behavior Analysis ◽  
Engine Speed ◽  
Analysis Techniques ◽  
Combustion Behavior ◽  
Engine Speed Range ◽  
Speed Range ◽  
High Engine Speed

Piston Friction Force of a Small High Speed Gasoline Engine

1988 ◽  
Vol 110 (1) ◽  
pp. 112-118 ◽  
Author(s):  
M. Takiguchi ◽  
K. Machida ◽  
S. Furuhama
Keyword(s):  
Friction Force ◽  
High Speed ◽  
Engine Speed ◽  
Gasoline Engine ◽  
Measuring Instruments ◽  
Friction Forces ◽  
Engine Speed Range ◽  
Speed Range ◽  
High Engine Speed

This paper clarified piston friction forces and conditions of lubrication in the high engine speed range through the improvement of piston friction measuring instruments. Measurements of piston friction forces of the two-ring package have been also done. It is found that the effect of the two-ring package on the reduction of friction forces is greater than expected by means of the oil starvation phenomenon.

scholarly journals Analisis Kekasaran Baja AISI 304 Akibat Variasi Parameter pada Proses Roughing CNC Turning Menggunakan Pahat Cermet

2020 ◽  
Vol 3 (1) ◽  
pp. 18
Author(s):  
Nugroho Setyo Pambudi
Keyword(s):  
Surface Roughness ◽  
Engine Speed ◽  
Descriptive Analysis ◽  
Feed Speed ◽  
Aisi 304 ◽  
Analysis Techniques ◽  
Spindle Rotation ◽  
High Engine Speed ◽  
High Feed ◽  
Data Collection Technique

Abstract: This study aims to determine the surface roughness value of AISI 304 steel due to variations in spindle speed and feed motion. The method used is pre-experimental design and data analysis techniques used are descriptive analysis techniques. The spindle rotation speed used is 1990 rpm, 2100 rpm, and 2300 rpm, while the feed motion used is 0.18 mm / rev, 0.23 mm / rev, and 0.28 mm / rev. The cutting tool used in this study is a Mitsubishi brand insert chisel with ISO standard CNMNG120404-MA, while the data collection technique using a measuring tool to measure the surface roughness of the workpiece is the Surface Roughness Test Mitutoyo Portable Surftest SJ 301 series. The results of this study indicate that high engine speed reaches 2300 Rpm and low feed motion reaches 0.18 mm / rev resulting in low surface roughness levels reaching 2.17 µm. While the highest is obtained at low engine speed and high feed motion which reaches 1900 Rpm and 0.28 mm / rev with a surface roughness value of 4.43 µm.Keywords: Spindle rotation, feed speed, turning, CNC lathe, surface roughness. 

scholarly journals An Innovative Constant Voltage Control Method of PMSM-Type ISG Under Wide Engine Speed Range for Scooter With Idling Stop

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 20723-20733 ◽  
Author(s):  
Ming-Shi Huang ◽  
Kuan-Cheng Chen ◽  
Tse-Kai Chen ◽  
Yu-Chiang Liang ◽  
Guan-You Pan
Keyword(s):  
Engine Speed ◽  
Control Method ◽  
Voltage Control ◽  
Constant Voltage ◽  
Engine Speed Range ◽  
Speed Range

Crankshaft Torsional Vibration Characteristics in a Vee-Type Six-Cylinder Diesel Engine

2002 ◽  
Author(s):  
Jouji Kimura ◽  
Shinichirou Kobayashi ◽  
Kazuhiro Shiono
Keyword(s):  
Diesel Engine ◽  
Torsional Vibration ◽  
Engine Speed ◽  
Significant Degree ◽  
Vibration Characteristics ◽  
Resonant Vibration ◽  
Harmonic Order ◽  
Engine Speed Range ◽  
Speed Range

Engines have been designed to avoid low-harmonic-order resonant torsional vibration in a commonly-used engine speed range, but the authors have found that, in some engines, especially turbo-charged engines, a significant degree of a low-harmonic-order exciting torque acts on the crankshaft. In these engines, the amplitude of non-resonant low-harmonic-order torsional vibration is almost as large as that of the resonant one and the amplitude of non-resonant vibration can not be controlled by a damper. Accordingly, to investigate the characteristics of non-resonant low-harmonic-order torsional vibration is important. This paper describes the characteristics of non-resonant and resonant torsional vibration for a vee-type six-cylinder diesel engine.

Performance Characteristics of Philippine Hydrous Ethanol-Gasoline Blends: Preliminary Findings

2019 ◽  
Author(s):  
John Luis Yu ◽  
Edwin N. Quiros
Keyword(s):  
Fossil Fuels ◽  
Engine Speed ◽  
The Philippines ◽  
Fuel Blend ◽  
Fuel Blends ◽  
Engine Speed Range ◽  
Speed Range ◽  
Preliminary Study ◽  
Ethanol Blends ◽  
Hydrous Ethanol

Abstract To reduce dependence on imported fossil fuels and develop indigenous biofuels, the Philippines enacted the Biofuels Act of 2006 which currently mandates a 10% by volume blend of 99.6% anhydrous bio-ethanol for commercially sold Unleaded and Premium gasolines. To urge a regulation review of the anhydrous requirement and examine the suitability for automotive use of hydrous bioethanol (HBE) blends, preliminary engine dynamometer tests at 1400–4400 rpm were conducted to measure specific fuel consumption (SFC) and power. In this study, HBE (95 % ethanol and 5% water by volume) produced from sweet sorghum using a locally-developed process, was blended volumetrically with three base gasoline fuels — Neat, Unleaded, and Premium. The four HBE blends tested were 10% and 20% with Neat gasoline, 20% with Unleaded gasoline, and 20% with Premium gasoline. For blends with Neat gasoline, the SFC of the 10%HBE blend was comparable with to slightly higher than Neat gasoline. The SFC of the 20%HBE blend was comparable with Neat gasoline up to 2800 rpm and lower beyond this speed thus being better overall than the 10%HBE blend. Compared to their respective commercial base fuels, the HBE-Unleaded blend showed lower SFC while the HBE-Premium blend yielded slightly higher SFC over most of the engine speed range. Between commercial fuel blends, the HBE-Unleaded blend gave better SFC than the HBE-Premium blend. Power was practically similar for the fuels tested. No engine operational problems and fuel blend phase separation were encountered during the tests. This preliminary study indicated the suitability of and possible optimum hydrous bio-ethanol blends for automotive use under Philippine conditions.

scholarly journals CO2 concentration from turbocharged common rail diesel engine dually fueled with compressed biomethane gas controlled at optimum ratio

2018 ◽  
Vol 192 ◽  
pp. 02013
Author(s):  
Niti Kammuang-lue ◽  
Matas Bhudtiyatanee
Keyword(s):  
Diesel Engine ◽  
Engine Speed ◽  
Co2 Concentration ◽  
Unburned Carbon ◽  
Dual Fuel ◽  
Optimum Ratio ◽  
Engine Torque ◽  
Engine Speed Range ◽  
High Engine Speed ◽  
Carbon Dioxide Co2

The objectives of this study are to investigate the carbon dioxide (CO2) concentration from the compressed biomethane gas (CBG) and diesel dual-fueled diesel engine and to compare the CO2 concentration produced from the dual-fueled and the diesel-fueled engines. The duration of CBG injection was controlled by following the optimum ratio of the CBG obtained from the previous study. During the test, the engine speed was varied from 1,000 to 4,000 rpm and the engine torque was maintained to be 25, 50, 75 and 100% of the maximum engine torque. Experiment was divided into two parts consisting of the dual-fueled and the diesel-fueled modes. From the dual-fueled mode, when the engine speed increased, the CO2 concentration decreased. Because the optimum ratio of the CBG and the volumetric efficiency decrease during the high engine speed range, the proportion of the diesel increases, the incomplete combustion occurs. The unburned carbon oxidizes to be the CO in higher proportion than the CO2, thus, the CO2 consequently decreases. From the CO2 comparison, the dual-fuel mode produced the CO2 nearly the same as that of the diesel-fuel mode during the low engine torque. On contrary, the dual-fuel mode had higher CO2 concentration during the high engine torque.

Effects of Design for Piston Pin and Bearing on State of Bearing Lubrication

2007 ◽  
Author(s):  
Hideyuki Iwasaki ◽  
Yuuto Higasa ◽  
Masaaki Takiguchi ◽  
Seiichi Sue ◽  
Keitaro Shishido
Keyword(s):  
Contact Pressure ◽  
Engine Speed ◽  
Gasoline Engine ◽  
The State ◽  
Bearing Contact ◽  
High Engine Speed

We measured the friction of piston pin boss bearings for a gasoline engine to make sure of the state of lubrication. In addition, we checked how the shape of the piston pin as well as that of the pin boss influenced the state of bearing lubrication, which was analyzed according to the FEM calculations of pin and bearing contact pressure. As a result, it was made clear that the state of bearing lubrication sharply deteriorated at an engine speed of 3500 rpm or higher because the deformed pin caused the pin edge to heavily come into contact with the bearing, and a side relief was able to improve the state of lubrication at a high engine speed. We also gave a check to the piston pin for thickness to see how it influenced the state of lubrication, finding that a lighter-weight pin led to the deterioration of lubrication.

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