A Development of Measurement System for Piston Ring Sliding Surface Pressure

Mochizuki, Kazuya; Watanabe, Y.; Owashi, Michiyasu; Mihara, Yuki

doi:10.4271/2018-32-0022

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…In this research, the following improvements were made to the measurement system in order to realize high-precision measurement in the low pressure region [15,16]. Figure 5 shows the improvement of the Wheatstone bridge circuit device.…”

Section: Outline Of the Measurement Systemmentioning

confidence: 99%

A Study on Sliding Surface Pressure Measurement of Piston Ring under Reciprocating Condition Using Thin-Film Sensor

et al. 2019

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In the tribology of mechanical elements using lubricating oil, verification of the dynamic surface pressure distribution during sliding operation is necessary in order to elucidate the sliding condition. The same also applies to the piston rings which are the sliding part of compression reciprocating device. Although some verification case in static condition or limited sliding area has been studied, there are many unknown aspects in this field. The thin-film sensor, since it has small influence on the shape of the sliding surface, is widely used as a measurement method of the sliding surface pressure between two different surfaces, however this method has never been applied to the piston ring in the past. In this study, various film deposition methods on the piston ring of the thin-film sensor were examined, and the thin-film pressure sensor with a total thickness of 4.6 μm was successfully formed on the sliding surface by sputtering. The surface pressure distribution of the sliding part was measured using the reciprocating sliding tester by this thin-film pressure sensor, and the measurement values were in good agreement with the mixed lubrication model between the piston ring and the cylinder liner.

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Section: Outline Of the Measurement Systemmentioning

confidence: 99%

A Study on Sliding Surface Pressure Measurement of Piston Ring under Reciprocating Condition Using Thin-Film Sensor

et al. 2019

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“…Such sensors are characterized as causing little change in the shape and rigidity of the object being measured. As a result, thin-film sensors have been used to succesfully measure the oil film pressure on main bearings [7], big-end bearings [8], piston skirts [9], gear tooth surfaces [10], piston pin bosses [11][12][13], and piston ring sliding surfaces [14] in unit fatigue tests.…”

Section: Introductionmentioning

confidence: 99%

Development of Oil Film Pressure Measurement System for Engine Sliding Parts

Oikawa,

Owashi,

Mihara

et al. 2023

Tribology Online

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Reduction of heat and mechanical losses is a critical factor in reducing CO 2 emissions and fuel consumption of automotive engines. Toward that end, it is necessary to investigate the lubrication conditions of engine sliding surfaces and instantaneous heat flux in the combustion chamber in order to obtain experimental data for validating computer-aided engineering (CAE) calculations. The authors used thin-film sensors to measure the distribution of the oil film pressure on the sliding surfaces of engine parts including pistons, bearings and gear tooth surfaces. This paper describes the structure and configuration of the thin-film sensors and the measurement system used for direct observation, especially of piston pins, and presents the measured results.

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The Neutronic Engine: A Platform for Operando Neutron Diffraction in Internal Combustion Engines

Wissink,

Wray,

Lee

et al. 2023

SAE Int. J. Engines

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<div>Neutron diffraction is a powerful tool for noninvasive and nondestructive characterization of materials and can be applied even in large devices such as internal combustion engines thanks to neutrons’ exceptional ability to penetrate many materials. While proof-of-concept experiments have shown the ability to measure spatially and temporally resolved lattice strains in a small aluminum engine on a timescale of minutes over a limited spatial region, extending this capability to timescales on the order of a crank angle degree over the full volume of the combustion chamber requires careful design and optimization of the engine structure to minimize attenuation of the incident and diffracted neutrons to maximize count rates. We present the design of a “neutronic engine,” which is analogous to an optical engine in that the materials and external geometry of a typical automotive engine have been optimized to maximize access of the diagnostic while maintaining the internal combustion chamber geometry and operability of the engine. The high transparency of aluminum to neutrons makes it the ideal window material for neutron diagnostics, which allows the neutronic engine to be a truly all-metal engine with the same load and boundary condition capabilities of a modern downsized passenger car engine. The neutronic engine will enable 3D and time-resolved measurements of strain, stress, and temperature fields as well as phase transformation, texture, and microstructure throughout the metal components of the combustion chamber.</div>

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A Development of Measurement System for Piston Ring Sliding Surface Pressure

Cited by 3 publications

References 9 publications

A Study on Sliding Surface Pressure Measurement of Piston Ring under Reciprocating Condition Using Thin-Film Sensor

A Study on Sliding Surface Pressure Measurement of Piston Ring under Reciprocating Condition Using Thin-Film Sensor

Development of Oil Film Pressure Measurement System for Engine Sliding Parts

The Neutronic Engine: A Platform for Operando Neutron Diffraction in Internal Combustion Engines

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