Observation of Transient Oil Consumption with In-Cylinder Variables

Ariga, Susumu

doi:10.4271/961910

Cited by 10 publications

(5 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The measurement of the gas pressures in the spaces between the rings, the axial displacements of the rings in the grooves and the gas temperatures were, however, technically possible. Literature mentions the measurement of these quantities [1][2][3][7][8][9][10][11][12]. Piezoelectric converters were used most frequently for the measurement of the pressures [3,8,9,12], though a piezo-resistant sensor was mentioned in the literature as well [11].…”

Section: Opis Modelu I Założenia Do Budowy Stanowiskamentioning

confidence: 99%

“…Piezoelectric converters were used most frequently for the measurement of the pressures [3,8,9,12], though a piezo-resistant sensor was mentioned in the literature as well [11]. For the measurement of the axial displacements of the rings in the grooves capacitive [10,12] or induction [1,7,8] sensors were used. The authors decided that the said three quantities would be used for the validation of the model.…”

Section: Opis Modelu I Założenia Do Budowy Stanowiskamentioning

confidence: 99%

“…Za możliwe technicznie uznano natomiast wykonanie pomiarów ciśnień gazu w przestrzeniach międzypierścieniowych, przemieszczeń osiowych pierścieni w rowkach, a także temperatury gazu. W literaturze występują informacje o pomiarach tych wielkości [1][2][3][7][8][9][10][11][12]. Do pomiaru ciśnienia najczęściej używano przetworników piezoelektrycznych [3,8,9,12], choć spotkano się również z wykorzystaniem do tego celu, w silniku średnioobrotowym, czujnika piezorezystancyjnego [11].…”

Section: Opis Modelu I Założenia Do Budowy Stanowiskaunclassified

“…Do pomiaru ciśnienia najczęściej używano przetworników piezoelektrycznych [3,8,9,12], choć spotkano się również z wykorzystaniem do tego celu, w silniku średnioobrotowym, czujnika piezorezystancyjnego [11]. Do pomiaru przemieszczeń osiowych pierścieni w rowkach tłoka stosowano czujniki pojemnościowe [10,12] lub indukcyjne [1,7,8]. Podjęto decyzję, że wymienione trzy wielkości wykorzystane będą to weryfikacji modelu.…”

Section: Opis Modelu I Założenia Do Budowy Stanowiskaunclassified

See 3 more Smart Citations

A research stand for the testing of the sealing properties of the piston-rings-cylinder assembly in a combustion engine

Koszałka¹,

Hunicz²,

Kordos³

2013

Combustion Engines

View full text Add to dashboard Cite

The paper discusses research assumptions and describes a test stand for the investigations of the sealing properties of the piston rings. The research stand includes an engine brake together with a control system, a research engine and a lubrication and engine thermal state stabilization systems. The engine was fitted with a research piston containing a measuring device enabling the recording of fast varying quantities such as the pressures in the space between the rings, axial displacements of the oil sealing rings in the piston grooves and the temperatures of the gas blown through the seal.

show abstract

Section: Opis Modelu I Założenia Do Budowy Stanowiskamentioning

confidence: 99%

Section: Opis Modelu I Założenia Do Budowy Stanowiskamentioning

confidence: 99%

Section: Opis Modelu I Założenia Do Budowy Stanowiskaunclassified

See 2 more Smart Citations

A research stand for the testing of the sealing properties of the piston-rings-cylinder assembly in a combustion engine

Koszałka¹,

Hunicz²,

Kordos³

2013

Combustion Engines

View full text Add to dashboard Cite

show abstract

“…Yilmaz et al concluded that at loads less than 50% of the maximum, oil consumption is mainly due to oil transport past the piston rings and increased as load increased. Ariga (1996) stressed the importance of developing oil reduction strategies specifically pointing out that the current levels of oil-derived particulate emissions in a heavy duty diesel engine is approximately 0.02 g/bhp-hr under the US FTP transient emissions test procedure. This is 25% of the 0.1 g/bhp-hr particulate standard.…”

Section: Introductionmentioning

confidence: 99%

Oil Accumulation and First Fire Readiness Analysis of Cylinder Deactivation

et al. 2017

View full text Add to dashboard Cite

Cylinder deactivation (CDA) is a technology that can improve the fuel economy and exhaust thermal management of compression ignition engines (diesel and natural gas), especially at low loads and engine idling conditions. The reduction in engine displacement during CDA improves fuel efficiency at low loads primarily through a reduction in pumping work. During deactivation of a given cylinder, the drop in pressure inside the cylinder could possibly lead to the transport of oil from the crankcase into the cylinder owing to the reduced pressure difference between the crankcase and the cylinder. In addition, CDA might inhibit the first fire readiness of a reactivating cylinder as a result of reduced wall, head, and piston temperatures. Both of these potential issues are quantitatively studied in this article. This article describes a strategy to estimate in-cylinder oil accumulation during CDA, and first fire readiness following CDA, through comparison of individual heat release profiles before and after CDA. Cylinder cool-down and oil accumulation during deactivation could possibly result in misfire or degraded combustion upon an attempt to reactivate a given cylinder. Fortunately, experiments described in this article demonstrate no cases of misfire at any speed/load conditions for the CDA durations tested, specifically 100 ft-lb load at 800 rpm and 1,200 rpm with deactivation intervals of 0.5, 5, 10, and 20 min. Although pilot heat release in the reactivated cylinders was delayed by approximately 1 CAD after 5 min of CDA, the main heat release was very similar to the heat release of a continuously activated cylinder. As such, results show no first fire readiness issues at the conditions tested. The duration of time the engine could be operated in CDA mode without significant oil accumulation and other methods to minimize oil accumulation during CDA have also been proposed.

show abstract