Damage to engine parts caused by high pressure rates dp/dt

G. Wachtmeister, G. Woschni, K. Zeilinger

Research output: Contribution to journalConference articlepeer-review

Abstract

The necessity to develop more economical engines has resulted in an ever-increasing approximation of the combustion process towards the isochore constant volume combustion, which causes a considerable increase in pressure rate in the combustion chamber. It is known that this can result in malfunctioning and damage to the power plant components. This was the reason to investigate theoretically and experimentally the mechanisms that produce these problems. Basically, it was shown that on the one hand high pressure rate values cause the mass-spring-system piston-connecting rod to move in longitudinal oscillations (tertiary motion). The amplitude of these oscillations depends solely on the pressure rate. On the other hand the 1. piston ring is subject to high radial forces and is drawn inwards from the cylinder wall. This causes radial cracks which could break the ring.

Original languageEnglish
Pages (from-to)555-563
Number of pages9
JournalProceedings - Society of Automotive Engineers
StatePublished - 1990
Externally publishedYes
EventEighteenth FISITA Congress - The Promise of New Technology in the Automotive Industry - Torino, Italy
Duration: 7 May 199011 May 1990

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