Development Strategy for High Specific Power Low Emission Diesel Engines

Vora, K. C.; Ramdasi, S. S.; Walke, Nagesh Harishchandra; Marathe, A. V.; Marathe, N. V.

doi:10.4271/2009-26-0020

Cited by 8 publications

(2 citation statements)

References 9 publications

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“…In engine development, the compression ratio and the specific power of engines have been progressively increased [1,2] resulting in higher cylinder liner temperatures near the combustion chamber, especially at top dead centre. This produces conditions that are more likely to produce wear and scuffing of piston ring-cylinder liner contacts [3].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Aluminium–Silicon Alloy on ZDDP Tribofilm Formation on the Counter-Surface

Shimizu

Spikes

2017

Tribol Lett

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In order to reduce vehicle weight and thus improve fuel economy, aluminium (Al) alloys have been increasingly adopted as contact surfaces such as piston skirts and cylinder liners in current engines. In general, hypereutectic Al-Si alloys are used, in which hard silicon grains are embedded in a softer Al-Si single phase matrix. It is reported that after rubbing, the matrix is removed to leave silicon grains protruding from the surface. However, the response of the counter-surface by these silicon grains is rarely investigated. In this study, mini traction machinespace layer imaging (MTM-SLIM) has been used to monitor tribofilm formation in situ and investigate the evolution of both surfaces in the contact of a steel ball on an Al-Si disc lubricated by ZDDP solution. In low-load conditions, the top layer of aluminium on the Al-Si disc is removed physically to leave silicon grains protruding from the surface, while ZDDP tribofilm pads are formed mainly on the grains. On the counter-surface (steel ball), ZDDP tribofilms are formed and build up with no wear scars. In high-load conditions, deep gaps are observed to form initially round the silicon grains on the disc. During rubbing, these become shallower, while the silicon grains start to protrude. On the steel ball, ZDDP tribofilm is generated initially over the whole rubbing track, but then the tribofilm in the middle of the track is almost completely removed by rubbing against the protruding silicon grains. Wear of the underlying steel surface then ensues.

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Section: Introductionmentioning

confidence: 99%

The Influence of Aluminium–Silicon Alloy on ZDDP Tribofilm Formation on the Counter-Surface

Shimizu

Spikes

2017

Tribol Lett

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“…As a consequence of the need to reduce the fuel consumption of passenger vehicles, the compression ratio and the specific power of internal combustion engines have been steadily increasing throughout the last 20 years [1,2]. Because of this, cylinder liner temperature near the combustion chamber, especially at top dead centre, has increased so the conditions have become more severe for wear and scuffing behaviour of piston ring cylinder liner contacts [3].…”

Section: Introductionmentioning

confidence: 99%

The Tribofilm Formation of ZDDP Under Reciprocating Pure Sliding Conditions

Shimizu

Spikes

2016

Tribol Lett

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The anti-wear and anti-seizure performance and action mechanisms of zinc dithiophosphate (ZDDP) have been investigated under reciprocating pure sliding conditions to simulate piston ring and cylinder liner assembly, using new techniques. The Mini Traction Machine-Space Layer Imaging is a useful method for monitoring tribofilm formation by ZDDPs. However, tests are generally carried out in mixed sliding-rolling conditions and ZDDP film formation in reciprocating pure sliding conditions is rarely investigated. In this paper, the authors describe an investigation of ZDDP film formation in stationary ball on reciprocating disc pure sliding conditions and compare the results to those obtained in unidirectional pure sliding conditions. In unidirectional pure sliding conditions, the worn area on the ball expands with test time. By contrast, in reciprocating pure sliding conditions, tribofilm forms on the stationary ball and no significant damage occurs. In the initial tribofilm formation under reciprocating pure sliding conditions, solid particulate tribofilm with a high concentration of S forms initially in the contact area and subsequently breaks up. During further rubbing, a Zn-and P-rich tribofilm forms on the comminuted sulphur-rich tribofilm and also the area where the initial tribofilm was removed.

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Elevated Temperature Tensile and Creep Performance of Conditioned T7 319 Aluminum Powertrain Alloy for Next Generation Diesel Engine Blocks

Stroh

Sediako

2023

Inter Metalcast

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Development Strategy for High Specific Power Low Emission Diesel Engines

Cited by 8 publications

References 9 publications

The Influence of Aluminium–Silicon Alloy on ZDDP Tribofilm Formation on the Counter-Surface

The Influence of Aluminium–Silicon Alloy on ZDDP Tribofilm Formation on the Counter-Surface

The Tribofilm Formation of ZDDP Under Reciprocating Pure Sliding Conditions

Elevated Temperature Tensile and Creep Performance of Conditioned T7 319 Aluminum Powertrain Alloy for Next Generation Diesel Engine Blocks

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