Poster Session
Poster Sessions for Academia
1st November

1. Vehicle Engine Laboratory, Meijo University
Prof. Kohei Nakashima
Observation of Axial Behavior of Piston Rings in a Two-Stroke Engine with Back Light of LEDs Mounted Inside
PistonWe developed an experimental two-stroke engine with a transparent cylinder and a piston with LEDs mounted
on its inside, so that we can observe the axial ring behavior with the light leaked through the side clearance
between the ring side face and the ring groove side face. Using this engine, we investigated the influences ofthe cylinder ports and the piston behavior on axial behavior of the top and second rings.
2. Machine Elements Lab., Kyoto University
Prof. Tomoko Hirayama
Micro-Dimple Effect and Its Mechanism for Friction Reduction of Plain Contact under Mixed Lubrication
In this study, friction tests were conducted to determine the optimum depth of micro dimples effective in
reducing friction of plain contact under mixed lubrication. In addition, the lubricant flow in the gap aroundmicro dimples was visualized by fluorescence microscopy to elucidate the friction reduction mechanism.
3. Iijima Lab., Nihon University
Ryo lgarashi
2st Opposed Piston Engine Research and Development for Series Hybrid System
This engine is assumption that will use for power generation. Characteristics are high power, low vibration ornoise, and high efficiency. We succeed engine test run through designing component. Currently, we are trying
the Performance measurement for this engine and compared Single-Cylinder.

2nd November

4. Advanced Research Lab., Tokyo City University
Tatsuro Kichima
Numerical Study on the Effect of Injection Timing on Mixture Formation in Jet-Plume-Controlled
Direct-Injection Near-zero Emission Hydrogen Engines
In direct injection hydrogen engines, the Plume Ignition and Combustion Concept (PCC) developed by theauthors has been applied to improve thermal efficiency and reduce NOx emissions. In this study, thecharacteristics of the PCC combustion mixture formation were verified by numerical analysis based on
experimental data of different injection timing.
5. Engine Research Lab., Tokyo City University
Yohsuke Inoue
Effect of Piston Skirt Diameter and Profile on Piston-to-Cylinder Friction ForceIn this study, friction force was measured on single-cylinder floating liner engines with different diameters andprofiles of the piston skirt. The friction reduction effect was evaluated by FMEP, 10% to 30% reduction wasachieved with smaller piston skirt diameters. In addition, friction reduction of up to 25% was achieved with theprofile modification, especially on the low revolution side.
6. Engine Research Lab., Tokyo City University
Riki Chida
Study on Oil Film Behavior and Vibration Transmission Characteristics between Crank Journals and Plain
Bearings
To understand the vibration transmission characteristics through the oil film between the crank journal and theplain bearing, vibration was measured using an engine bearing tester. Frequency analysis of the measured
vibrations indicated no peak in the natural frequency, suggesting the vibration transfer characteristics were dueto the oil film.
7. Engine Research Lab., Tokyo City University
Masashi Shirai
Experimental Validation to Improve the Accuracy of Calculations to Predict Lubricating Oil Consumption
To improve the accuracy of the lubricant oil consumption (LOC) prediction method, the amount of LOC wasmeasured by the S-trace method. By measuring the oil film thickness and pressure at the piston land, wecompared our experimental and calculated results. In this session we introduce the flow near the oil ring.

3rd November

8. Motorsports Engineering, University of North Carolina – CharlotteProf. Norman Garrett
Development of a Rotary Valve Engine for Handheld Equipment
A multi-position 4-Stroke piston engine utilizing a novel rotary valve system was developed for handheld
outdoor power equipment. The intent of the project was to create a low-emission 4-Stroke engine with 2-Stroke
performance levels including high RPM limits and power output. This was accomplished using a rotary valve
system in lieu of the typical poppet valves of traditional 4-Stroke engines.

Short presentation schedule (5 minutes presentation for each poster.)
1st November

Poster number

2nd November

Poster number

3rd November

Poster number

12:30-13:00

1, 2, 3

12:20-13:00

4, 5, 6, 7

11:00-11:15

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