AVL LIST GmbH-Mirko Plettenberg, Julian Schäffer, Josef Edtmayer, Sigfried Loesch, Heinz-Georg Flesch
Graz University of Technology-Hannes Hick, Simon Walch
To be published on
by SAE International in United States
To achieve future fleet CO2 emission targets all kind of powertrains including thus with internal combustion engines need to achieve highest efficiency. Next to others the reduction of friction is one contributor to increase powertrain efficiency. The piston bore interface (PBI) is responsible for up to 50% of total engine friction losses. Optimizations in this area combined with use of low viscosity oil, which can reduce the friction of further engine sub-systems, will have the highest positive impact. To assess the friction of PBI under consideration of cross effects on other relevant parameters for mechanical function (e.g. blow-by & wear) and emissions (e.g. oil consumption) AVL has established a holistic development method based on the AVL FRISC (FRIction Single Cylinder) engine with floating liner measurement concept combined with synchronous online oil consumption and wear measurement supported by advanced simulation models, which were validated with further advanced measurement techniques. This paper will present the development method approach based on selected exemplary results and the possible transfer of results to multi cylinder engine development. Alternative Session: M203…
This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Technical University of Munich, Germany-Julian Schäffer, Claus Kirner, Martin Härtl, Georg Wachtmeister
by SAE International in United States
The design of cylinder liners, pistons, and piston rings is subject to different conflicting goals. In addition to a loss-free seal of the combustion chamber, sufficient oil must be present between the friction partners. Both the reduction of piston assembly friction and the minimization of oil consumption are crucial to achieve the strictly defined CO2 and emission standards. To master this challenge and find the best compromise requires a lot of system-specific know-how. The automobile and engine manufacturers focus mainly on friction-reducing measures, which are analyzed with different measuring methods such as the floating-liner method, the strip-down method, or the instantaneous indicated mean effective pressure (IMEP) method. However, the interpretation of the results and the development of realistic simulation models lacks information about the oil film behavior and the film thickness. In order to gain this missing knowledge, instruments for oil film visualization and oil film thickness measurement have to be developed. In the FVV-project “Piston ring oil transport - Glassliner”, the two-dimensional laser-induced fluorescence method (2D-LIF) is used to visualize the lubricating oil film…
This content contains downloadable datasets
Annotation ability available
A list of downloadable items.
Please Wait. Loading Available Formats...
This modal will allow the user to download citation information or export specific fields of data into one of three file formats: Excel, comma-separated values, or text.
Sorry, this document is already saved to a project folder.
Share this content via social media.
Share Via Email
Email sent successfully!
Use this modal to save a search.
The current search and criteria have already been saved. Please modify your criteria to save as a new search.
Request Sent successfully!
Search Tips: Search Operators:AND, OR, NOT; Wild Cards; Using Quotes
SAE MOBILUS® Search Tips
Please note: All terms not contained within quotes, will be evaluated using the OR operator. This means that your search results will contain all results that contain ANY of the entered terms.
AND, OR, NOT
SAE MOBILUS supports the use of the AND, OR and NOT BOOLEAN operators ONLY function with the Advanced Search.
Using the asterisk, ( * ) allows you to search for a partial word. For example, entering a keyword search of aero* will search for any word beginning with aero.
Using the question mark, ( ? ) allows you to search for a word with a single character wildcard. For example, searching for t?re would match both tire and tyre
Words in double quotes " " are treated as a phrase. Conducting a search for "heat model" will return all results in which the exact phrase "heat model" is found, while "heat modeling" would NOT be included.
A term combined with a phrase will be joined with an OR operator.
Searching for Standards
When searching for a standard please use the entire Document Number assigned, which includes the abbreviation. A space can be used, or omitted between the abbreviation and number.