Oil Emissions of a SI Engine

Knoll, Gunter; Schlerege, Frank; Matz, Gerhard; Krause, Sven; Thiemann, Wolfgang; Hollen, Philipp von; Robota, Arnim

doi:10.1007/bf03227935

Cited by 2 publications

(4 citation statements)

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“…XRD measurements were made on the laser treated surface of the samples. The XRD investigations were made with a Philips X'Pert Diffractometer CuKα source with Fuji Imaging Plates (BAS-MS 2025) with a spotsize of 100x500 µm 2 .…”

Section: Methodsmentioning

confidence: 99%

“…To determine the average grain size several FIB images were pasted together, so the pasted images covered an area of approx. 20×7 µm 2 . The average grain sizes (d FIB ) and the…”

Section: Figure 1 Hardness Vs Indentation Depth Curves Of the Nd-yag ...mentioning

confidence: 99%

“…To improve mechanical and tribological properties of cast iron cylinder bores it is possible to use special mechanical [2] and laser structuring treatments [3], or -which is used by a large European automotive manufacturer -a special laser treatment on the V-block engines (after the honing process) to alter the properties of the cylinder bores. Due to the laser treatment, the surface of the cylinder bore melts, it becomes harder and more wear resistant.…”

Section: Introductionmentioning

confidence: 99%

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Laser Treatment of Cast Iron Engine Cylinder Bore with Nanosecond Laser Pulses

Májlinger

Szabó

2010

MSF

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The environmental and polluting materials emission standards in Europe are going to be always stricter, so in order to keep up with them, one of the largest European automotive manufacturer performs a laser treatment on the cylinder bores of their internal combustion engines. Due to the laser treatment, the near surface area of the cylinder bore becomes harder and more wear resistant, furthermore, due to the inhomogenity of the pearlitic matrix and graphite lamellae, oil reserving holes are formed. In our present work we investigated the laser treated layer of cast iron cylinder bores with lamellar graphite. Samples prepared with two different lasertypes and different energies were investigated on behalf of metallographic and functional aspects.

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Section: Methodsmentioning

confidence: 99%

“…To determine the average grain size several FIB images were pasted together, so the pasted images covered an area of approx. 20×7 µm 2 . The average grain sizes (d FIB ) and the…”

Section: Figure 1 Hardness Vs Indentation Depth Curves Of the Nd-yag ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Laser Treatment of Cast Iron Engine Cylinder Bore with Nanosecond Laser Pulses

Májlinger

Szabó

2010

MSF

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“…To improve the mechanical and tribological properties of different cylinder bores, it is possible to use special mechanical treatment [2], chemical coatings [3][4][5], and laser structuring treatments [6]. Originally, different laser machining techniques were used for cutting in order to produce smaller and smaller parts (for medical [7,8] and other applications [9]), nowadays, laser techniques are also used for surface modification at different depths.…”

Section: Introductionmentioning

confidence: 99%

Formation of an ultrafine grained layer due to high temperature treatment of the surface of a cast iron cylinder bore

Májlinger

Szabó

Bobor

2013

Materials at High Temperatures

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In order to meet environmental standards, a finishing laser treatment on the honed cylinder bores of V-engine blocks was performed. Samples of laser-treated cast-iron cylinder bores with lamellar graphite were taken. Scanning electron micrographs were taken on cross-sectioned specimens with a scanning electron microscope/focused ion beam dual beam instrument in order to evaluate the microstructure and grain size of the laser-treated layer. Specimens were found to be ultrafine grained. To simulate the thermal distribution during laser treatment, finite element method simulations were made for different laser energy densities. During laser treatment oil reserving holes were formed due to the inhomogenity of the pearlitic matrix and graphite lamellae, and the high temperature of the laser treatment. To quantify the number of oil reserving holes, a new image analysis method has been developed. It was found that the amount of oil reserving holes increased with higher laser energy densities.Keywords: high temperature treatment, laser surface treatment, cast iron, cylinder bore, finite element method, focused ion beam, image analysis

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Oil Emissions of a SI Engine

Cited by 2 publications

References 0 publications

Laser Treatment of Cast Iron Engine Cylinder Bore with Nanosecond Laser Pulses

Laser Treatment of Cast Iron Engine Cylinder Bore with Nanosecond Laser Pulses

Formation of an ultrafine grained layer due to high temperature treatment of the surface of a cast iron cylinder bore

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