Oil Film Thickness Measurement and Analysis of a Three Ring Pack in an Operating Diesel Engine

Takiguchi, Masaaki; Sasaki, Ryuichiro; Takahashi, Ikuma; Ishibashi, Fumihiko; Furuhama, Shoichi; Kai, Ryoji; Sato, Masaharu

doi:10.4271/2000-01-1787

Cited by 33 publications

(36 citation statements)

References 2 publications

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“…The type of motion seen in figure 10 has also been reported by Takiguchi et al [35], although for different loading conditions and the secondary compression ring. The power loss at these engine speeds is shown in figure 12.…”

Section: Resultssupporting

confidence: 67%

Effect of Compression Ring Elastodynamics Behaviour upon Blowby and Power Loss

Baker¹,

Rahmani²,

Karagiannis³

et al. 2014

SAE Technical Paper Series

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Section: Resultssupporting

confidence: 67%

Effect of Compression Ring Elastodynamics Behaviour upon Blowby and Power Loss

Baker¹,

Rahmani²,

Karagiannis³

et al. 2014

SAE Technical Paper Series

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“…These data are used to carry out simulation studies using the methodology presented in our work. Figures 17 and 18 show comparisons between the experimental results, presented in Takiguchi et al [36], and the analysis predictions made here. The latter have been obtained at engine speeds (2000rpm and 2400rpm), showing reasonable agreement with measurements.…”

mentioning

confidence: 78%

“…Takiguchi et al [36] have provided film thickness predictions and measurements, as well as the required input data to replicate their reported study. The cylinder temperature was measured for a variety of speeds and loads, varying around 120°C.…”

mentioning

confidence: 79%

“…There are a host of underlying reasons for this, including bore out-of-roundness (not taken into account in the analysis), and a lack of detail regarding surface topography in [36], which has meant that predictive analysis could only be carried out for an assumed smooth conjunction and a parabolic axial ring profile. The bore is assumed to be a right circular cylinder for all analyses reported here.…”

mentioning

confidence: 99%

“…Recently, Baker et al [34,35] [36], showing improved accuracy, when ring modal behaviour is included in the tribological study.…”

mentioning

confidence: 99%

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On the Effect of Transient In-Plane Dynamics of the Compression Ring Upon Its Tribological Performance

Baker

Rahmani

Theodossiades

et al. 2014

Journal of Engineering for Gas Turbines and Power

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Energy losses in an internal combustion engine are either thermal or parasitic. The latter are the mechanical inefficiencies, chiefly as the result of generated friction. Nearly half of these losses are attributed to the piston–cylinder system. During idle and at low engine speeds, friction is the major contributor to the overall engine losses. In particular, the rather small top compression ring accounts for a disproportionate share. Therefore, detailed understanding of compression ring tribology/dynamics (referred to as tribodynamics) is essential. Moreover, the ring’s primary sealing function may be breached by its elastodynamic behavior. The reported analyses in literature do not account for the transient nature of ring elastodynamics, as an essential feature of ring–bore tribology. The transient in-plane dynamics of incomplete rings are introduced in the analysis and verified using a finite element analysis (FEA) model, in order to address this shortcoming. The methodology is then coupled with the tribological analysis of the top compression ring. Comparison is made with experimental measurements which show the validity of the proposed method. The radial in-plane elastodynamic response of the ring improves the accuracy of the frictional power loss calculations.

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