scholarly journals A Study to Investigate the Effect of Valve Mechanisms on Exhaust Residual Gas and Effective Release Energy of a Motorcycle Engine

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5564
Author(s):  
Nguyen Xuan Khoa ◽  
Ocktaeck Lim
Keyword(s):  
Simulation Model ◽  
Spline Approximation ◽  
Engine Performance ◽  
Research Data ◽  
Valve Mechanism ◽  
Experiment System ◽  
Cam Profile ◽  
Residual Gas ◽  
Motorcycle Engine ◽  
Engine Power

The purpose of this study was to investigate the effect of valve mechanisms on the exhaust residual gas (ERG) and effective release energy (ERE) of a motorcycle engine. Here, a simulation model and the estimation a new valve mechanism design is presented. An AVL-Boost simulation model and an experiment system were established. The classical spline approximation method was used to design a new cam profile for various valve lifts. The simulation model was used to estimate the effect of the new valve mechanism designs on engine performance. A new camshaft was produced based on the research data. The results show that the engine obtained a maximum engine brake torque of 21.53 Nm at 7000 rpm, which is an increase of 3.2% compared to the engine using the original valve mechanism. In addition, the residual gas was improved, the maximum engine effective release energy was 0.83 kJ, the maximum engine power was 18.1 kW, representing an improvement of 7.2%, and the air mass flow was improved by 4.97%.

scholarly journals Ignition systems of combustion piston engine and possibility of its optimization

2021 ◽  
Author(s):  
Marek Vorlíček ◽  
◽  
Jozef Čerňan
Keyword(s):  
Engine Performance ◽  
Basic Definition ◽  
Ignition Timing ◽  
Piston Engine ◽  
Ignition System ◽  
System Components ◽  
Definition Of ◽  
Engine Power

This paper explains the basic definition of ignition, combustion and description of the ignition system functionality. The ignition systems are divided according to established criteriums into the most used types and descriptions of each ignition system components. It focuses on ignition timing and circumstances that affect it and how they influence the observed parameters. I am using ignition timing as an instrument for the observation and optimization of ignition. These practices are tested on piston engine in the practical part of this paper. It describes the modification of the timing curve, measuring of engine power and comparison between each curve. It is an analysis of engine performance under different conditions. The most efficient timing curve is chosen and further evaluated. The used engine for this paper was a rebuild from a car engine used in Trabant 601, VEB Automobilwerke automobile.

scholarly journals Rancang Bangun dan Pengujian Penghalang Heliks sebagai Pencampur Udara-Biogas pada Motor Otto

2021 ◽  
Vol 8 (3) ◽  
pp. 89-96
Author(s):  
Herbert Hasudungan Siahaan ◽  
Armansyah H Tambunan ◽  
Desrial ◽  
Soni Solistia Wirawan
Keyword(s):  
Fuel Consumption ◽  
Performance Test ◽  
Engine Performance ◽  
Fuel Mixture ◽  
Specific Fuel Consumption ◽  
Combustion Reaction ◽  
Otto Cycle ◽  
Direct Use ◽  
Engine Power

A helical barrier as air-biogas mixing device was designed and tested for direct use of biogas from digester in otto cycle generator set. Homogeneity of the air-fuel mixture can give better combustion reaction and increase engine power. The design was based on simulation, which shows that a 0.039 m length of helical barrier gave a 5% increase in power compared to non-helical barrier. Likewise, the simulations also showed that the helical barrier reduced specific fuel consumption (SFC) by 8%. Accordingly, the mixer with helical barrier was designed, and fabricated. Its performance test confirms the improvement resulted by using helical barriers as air-biogas mixer in the engine. The experiment showed that the power increased by 5% when using helical barrier, while SFC decreased by 4.5%. It is concluded that the helical barrier can increase the homogeneity of the mixture resulting in better engine performance. Besides, emissions produced from the engine using a helical barrier also decreased.

scholarly journals The Effects of Port Water Injection on Spark Ignition Engine Performance and Emissions Fueled by Pure Gasoline, E5 and E10

Processes ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1214
Author(s):  
Farhad Salek ◽  
Meisam Babaie ◽  
Maria Dolores Redel-Macias ◽  
Ali Ghodsi ◽  
Seyed Vahid Hosseini ◽  
...  
Keyword(s):  
Water Injection ◽  
Engine Performance ◽  
Spark Ignition ◽  
Injection Rate ◽  
Spark Ignition Engine ◽  
Oxides Of Nitrogen ◽  
Human Beings ◽  
Performance And Emissions ◽  
Engine Performance And Emissions ◽  
Engine Power

It has been proven that vehicle emissions such as oxides of nitrogen (NOx) are negatively affecting the health of human beings as well as the environment. In addition, it was recently highlighted that air pollution may result in people being more vulnerable to the deadly COVID-19 virus. The use of biofuels such as E5 and E10 as alternatives of gasoline fuel have been recommended by different researchers. In this paper, the impacts of port injection of water to a spark ignition engine fueled by gasoline, E5 and E10 on its performance and NOx production have been investigated. The experimental work was undertaken using a KIA Cerato engine and the results were used to validate an AVL BOOST model. To develop the numerical analysis, design of experiment (DOE) method was employed. The results showed that by increasing the ethanol fraction in gasoline/ethanol blend, the brake specific fuel consumption (BSFC) improved between 2.3% and 4.5%. However, the level of NOx increased between 22% to 48%. With port injection of water up to 8%, there was up to 1% increase in engine power whereas NOx and BSFC were reduced by 8% and 1%, respectively. The impacts of simultaneous changing of the start of combustion (SOC) and water injection rate on engine power and NOx production was also investigated. It was found that the NOx concentration is very sensitive to SOC variation.

Cylinder-to-Cylinder Variations in a V6 Gasoline Direct Injection HCCI Engine

2009 ◽  
Vol 131 (4) ◽  
Author(s):  
Jacek Misztal ◽  
Hongming Xu ◽  
Miroslaw L. Wyszynski ◽  
Athanasios Tsolakis ◽  
Jun Qiao
Keyword(s):  
Direct Injection ◽  
Pressure Rise ◽  
Engine Performance ◽  
Gasoline Direct Injection ◽  
Experimental Investigations ◽  
Inlet Temperature ◽  
Split Injection ◽  
Hcci Engine ◽  
Combustion Technology ◽  
Cam Profile

Despite the fact that homogeneous charge compression ignition (HCCI) has been demonstrated as a combustion technology feasible for implementation with different fuels in various types of engines, cylinder-to-cylinder variations (CTCVs) in multicylinder HCCI engines remain one of the technical obstacles to overcome. A reduction in CTCV requires further developments in control technology. This study has been carried out with regard to the overall engine parameters, involving geometric differences between individual cylinders, coolant paths through the engine, combustion chamber deposits, and also the differences in the inlet temperature distributions between the cylinders. Experimental investigations on the Jaguar V6 HCCI research engine with negative valve overlapping and cam profile switching show that the differences in the rate of pressure rise between the cylinders can be larger than 1 bar/CA deg and that the load differences can be as high as 5–10%. It has been found that some individual cylinders will approach the misfiring limit far earlier than the others. The complex interaction between a number of parameters makes the control of the multicylinder engine a serious challenge. In order to avoid these differences, an active cylinder balancing strategy will be required. It has been observed that spark assistance and split injection strategy deliver the best control for the cylinder balance. However, spark assistance is restricted to low loads and low engine speeds, while split injection requires a considerable effort to optimize its possible settings. This paper defines the most important parameters influencing cylinder-to-cylinder variations in the HCCI engine and aims to put forward suggestions that can help to minimize the effect of cylinder-to-cylinder variations on the overall engine performance.

scholarly journals Perbedaan Unjuk Kerja Mesin Menggunakan Electronic Control Unit Tipe Racing dan Tipe Standar pada Sepeda Motor Automatic

2018 ◽  
Vol 3 (2) ◽  
pp. 138-143
Author(s):  
Rifki Mufti Rahman ◽  
Dwi Widjanarko ◽  
M. Burhan Rubai Wijaya
Keyword(s):  
Fuel Injection ◽  
Electronic Control Unit ◽  
Engine Performance ◽  
Control Unit ◽  
Maximum Power ◽  
Electronic Control ◽  
Performance Difference ◽  
Maximum Torque ◽  
Research Findings ◽  
Motorcycle Engine

The achievement of electronic-based motorcycle engine or Fuel Injection (FI) has better capability or power compared to conventional system vehicles. This research aims to determine the performance difference of using racing electronic control unit (ECU) compared to standard ECU of an automatic motorcycle. The experiment was carried out on a Honda Vario 125cc motorcycle manufactured in 2013. The research method is experimental research and uses descriptive statistic method. Research findings inform that the maximum torque of the standard ECU is 16.63 Nm at 3500 rpm, and the maximum power is 6.36 KW at 4500 rpm. The racing ECU (Iquteche) has a maximum torque of 22.42 Nm at 2500 rpm, and maximum power of 7.70 kW. The apparent increase in torque is around 36.58 % and in power is around 33.9 %. It can be concluded that the Iquteche ECU provides a more optimized engine performance on an automatic motorcycle.Prestasi mesin sepeda motor berbasis elektronik atau Fuel Injection (FI) memiliki kemampuan atau tenaga yang lebih baik dibandingkan dengan kendaraan sistem konvensional. Penelitian ini bertujuan untuk mengetahui perbedaan unjuk kerja mesin menggunakan Electronic Control Unit tipe racing dan tipe standar pada sepeda motor automatic. Objek penelitian dilakukan pada kendaraan Honda Vario 125cc tahun pembuatan 2013. Penelitian dilakukan dengan menggunkan metode experimental serta analisis data statistik deskriptif. Hasil penelitian menunjukkan bahwa diperoleh data torsi maksimal ECU standar sebesar 16.63 N.m pada putaran 3500 rpm, dan daya tertinggi sebesar 6.36 kW pada putaran 4500 rpm. Sedangkan hasil pengujian menggunakan ECU Iquteche diperoleh torsi tertingi sebesar 22.42 N.m pada putaran 2500 rpm, dan daya tertinggi sebesar 7.70 kW. Selain itu juga diketahui adanya peningkatan torsi mesin sebesar 36.58% dan peningkatan daya sebesar 33.99%, serta diketahui juga bahwa penggunaan ECU Iquteche lebih efektif untuk meningkatkan unjuk kerja mesin pada kendaraan jenis sepeda motor automatic.

scholarly journals APPLICATIONS OF OPERATIONS RESEARCH IN FORMULA ONE

2021 ◽  
Vol 6 (5) ◽  
Author(s):  
Aditi Mehta ◽  
Aashima Lakra ◽  
Adnan Godil ◽  
Aastik Dudani ◽  
Amaan Shaikh
Keyword(s):  
Simulation Model ◽  
Fuel Consumption ◽  
Operations Research ◽  
Operation Research ◽  
Additional Research ◽  
Formula One ◽  
Different Types ◽  
Optimization And Simulation ◽  
Engine Power

Formula one is one of the world's most high-paced sports in which a fraction of seconds can cost a win. From the method of calculating the time spent on a pitstop, when the car should come for the pitstop, fuel consumption, race strategy, aerodynamics, mechanics, engine power is all influenced by operation research. The paper aims at different techniques such as optimization and simulation, further discussing the different types of methods used. It provides brief information about the outcomes, drawbacks, and recommendations given for the efficient use of these techniques in the F1 racing world. It also addresses improvements that can be done by logistics, the necessary factors which need to be considered in the simulation model, and so on. The main objective is to study these techniques and provide an overview and limitations of each method, emphasizing the need for additional research to find solutions.

Sign in / Sign up

Export Citation Format

Share Document