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All Journal Jurnal Teknik Mesin RING Mechanical Engineering Jurnal Pendidikan Teknik Mesin
Nicko Nur Rakhmaddian
Politeknik Negeri Malang
Aerospace Engineering Automotive Engineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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Impact of Injection Duration and Injection Timing Variations on Torque and Power Output of the Ken Arok Urban Car Utilizing E100 Ethanol Nike Nur Farida; Muhammad Rafi Akbar Yudhistira; Nicko Nur Rakhmaddian
Jurnal Teknik Mesin (Sinta 3) Vol. 21 No. 2 (2024): OCTOBER 2024 (SINTA 3)
Publisher : Institute of Research and Community Outreach, Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jtm.21.2.43-50

Abstract

State Polytechnic of Malang (Polinema) actively participated in the energy-efficient car competition. The Polinema team has developed an energy-efficient car called Ken Arok, which competes in the urban ethanol class (Internal Combustion Engine) concept. This class emphasizes using internal combustion engines as the driving force and ethanol as the fuel. Ken Arok won fifth place in the competition due to obstacles in the programmed ECU program, especially in the injection duration. This study examines the effect of the interaction between injection duration and injection time variations on the torque and power output of the Ken Arok urban car fueled by E100 ethanol. An experimental approach was used in this study. A modified motor, converted into an energy-efficient urban car, was tested. The injection duration mapping was varied in multiples of 2 ms, with values ​​ranging from 2 ms less than the standard to 2 ms more than the standard. Likewise, the injection time was varied in multiples of 2 degrees, including 2 degrees less than the standard and 2 degrees more than the standard. The dyno tester measured the torque and power generated under these conditions. The main objective of this study was to identify the optimal torque and power settings for the Ken Arok energy-efficient engine. The highest torque value recorded was 10.13 N.m, achieved at 6000 rpm when using an injection duration of 2 ms more than the standard (9.06 ms) and an injection timing advanced by 2 degrees (3580). The peak power output reached 8.7 HP at 6000 rpm under compression injection duration plus 2 ms (9.06 ms), and when the injection was advanced by 20 (3580).
ANALISIS KINERJA POROS RODA SEPEDA MOTOR MELALUI PENDEKATAN FINITE ELEMENT METHOD DENGAN DUKUNGAN SOFTWARE SOLIDWORKS Agus dwi Putra; Galuh Zuhria Kautzar; Nicko Nur Rakhmaddian; Faradilla Fauziyah Risnawati
Jurnal Pendidikan Teknik Mesin Vol. 12 No. 1 (2025): Jurnal Pendidikan Teknik Mesin
Publisher : Program Studi Pendidikan Teknik Mesin Fakultas Keguruan dan Ilmu Pendidikan Universitas Sriwiajaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jptm.v12i1.56

Abstract

The motorcycle wheel shaft is a vital component that significantly impacts vehicle performance and rider safety. This study is motivated by the need to ensure an optimal wheel shaft design, considering its critical role in transmitting power, bearing loads, and maintaining the motorcycle's stability. The approach used in this research employs the Finite Element Method (FEM) through SolidWorks software to evaluate Von Mises stress, strain, and the factor of safety, with carbon steel a material known for its strength and corrosion resistance as the primary material. The analysis results reveal a maximum stress of 2.827x108 N/m², a maximum Displacement of 4.252x10-3 mm, and a minimum factor of safety of 5.111x102, indicating a reliable design. The study identifies critical areas prone to failure. Using a simulation-based approach, this research underscores the importance of FEM analysis in the development of safe and efficient mechanical components, contributing to enhanced performance and safety of vehicles.
The Effect of Thermostat Condition on Thermal Stability and Combustion Emission Efficiency in an Inline 4-Cylinder Gasoline Engine Agus Dwi Putra; Rangga Ega Santoso; Yayi Febdia Pradani; Diama Rizky Septiawan; Faqih Fadillah; Nicko Nur Rakhmaddian
RING ME Vol 6 No 1 (2026): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rme.v6i1.25320

Abstract

This study investigates the effect of thermostat conditions on thermal stability and exhaust emission efficiency in a 1,300 cc inline 4-cylinder gasoline engine. The novelty of this research lies in the integrated evaluation of thermostat removal and thermostat failure on both engine temperature stability and combustion emissions under identical operating conditions. A quantitative experimental method was applied using three thermostat conditions: normal thermostat, without thermostat, and clogged/damaged thermostat. Cooling system temperature and exhaust emissions (CO, HC, and CO₂) were measured at idle speed (800–1000 rpm) for 10 minutes with 2-minute intervals. The data were analyzed using descriptive comparative statistical analysis. The results show that the normal thermostat maintained the most stable operating temperature, reaching 95.8°C at the 8th minute. In contrast, the engine without a thermostat experienced unstable temperature increases and reached 93.4°C at the 10th minute, while the clogged thermostat condition produced the highest temperature of 96.6°C, indicating overheating potential. Removing the thermostat increased CO emissions from 0.01% to 0.04% and HC emissions from 31.7 ppm to 52.3 ppm. These findings confirm that thermostat condition significantly affects engine thermal stability and combustion efficiency; therefore, thermostat removal is not recommended.
Co-Authors Diama Rizky Septiawan Faqih Fadillah Faradilla Fauziyah Risnawati Galuh Zuhria Kautzar Muhammad Rafi Akbar Yudhistira Nike Nur Farida Putra, Agus Dwi Rangga Ega Santoso Yayi Febdia Pradani