Variable compression in SI engines Rheinisch-Westfälisch Technische Hochschule Aachen, Germany

Format:

Conference/Event

Author/Creator:

Pischinger, Stefan, author.

Conference Name:

2001 Internal Combustion Engines (2001-09-23 : Capri - Naples, Italy)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Naples, ITALY Consiglio Nazionale delle Ricerche 2001

Summary:

Downsizing is an effective way to further improve the efficiency of SI engines. To make most of this concept, the compression ratio has to be adjusted during engine operation. Thus, the efficiency disadvantages during part load can be eliminated. A fuel consumption reduction of up to 30% can be realized compared to naturally aspirated engines of the same power.After the assessment of several known concepts it turned out that the eccentric crankshaft positioning represents an appropriate solution which meets the requirements of good adjustability, unaltered inertia forces, low power demand of the positioning device and reasonable design effort. The basic challenges posed by the eccentric crankshaft positioning have been tackled, namely the crankshaft bearing and the integration of the newly developed power take-offs which have almost no influence on the base design.The thermodynamic potential of the downsizing concept should justify the additional design effort and the related cost increase of the assembly

Notes:

Vendor supplied data

Publisher Number:

2001-24-0050

Access Restriction:

Restricted for use by site license