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Influence of piston surface treatment on piston assembly friction in an eco-mileage vehicle engine
1
Department of Vehicle and Mechanical Engineering, Meijo University, Japan
Submission date: 2021-08-09
Final revision date: 2021-09-22
Acceptance date: 2021-09-23
Online publication date: 2021-10-03
Publication date: 2022-02-01
Corresponding author
Kohei Nakashima
Department of Vehicle and Mechanical Engineering, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku, 468-8502, Nagoya, Japan
Department of Vehicle and Mechanical Engineering, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku, 468-8502, Nagoya, Japan
Combustion Engines 2022,188(1), 18–23
KEYWORDS
pistoneco-mileage vehicle enginefloating cylinder linerpiston assembly frictionfine particle bombarding
TOPICS
ABSTRACT
This study investigated the effect on piston assembly friction after treating piston surfaces with a fine particle bombarding process, using a friction measurement apparatus with a floating cylinder liner, similar to an eco-mileage vehicle engine. Friction was measured in four conditions: (1) no treatment (standard piston in a commercially-available engine), (2) micro dimple treatment (45 μm ceramic particles were air-blasted onto the piston surface), (3) molybdenum disulfide (MoS2) shot treatment (1 μm MoS2 particles were air-blasted onto the piston surface), and (4) combination of the previous two micro dimple and MoS2 shot treatments (first 45 μm ceramic particles and then 1 μm MoS2 were air-blasted onto the piston surface). Results indicated that friction decreased in the following order: no treatment > micro dimple treatment > MoS2 shot treatment > combination of micro dimple and MoS2 shot treatments.
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