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A Study on Friction and Wear Characteristics of Sintered W/C-35%Ni Tappets for Diesel Engine Application

디젤엔진용 소결(W/C35%Ni) 태핏의 마멸거동에 관한 연구

  • 류병진 (볼보 건설기계 코리아 연구개발팀 선행연구그룹) ;
  • 오세일 (볼보 건설기계 코리아 연구개발팀 선행연구그룹) ;
  • 박맹로 (볼보 건설기계 코리아 연구개발팀 선행연구그룹) ;
  • 양승호 (한국과학기술연구원 트라이볼로지연구센터)
  • Published : 2000.02.01

Abstract

Abstract- In this paper tribological characteristics of solid and liquid phase sintered W/C-35%Ni tappets were investigated. Three test methods were performed to investigate the wear and surface damage mechanism of sintered tappets. First, block-on-ring wear test was performed to investigate the wear characteristics under pure sliding condition. Second, simplified cam and tappet tests (called component wear test hereafter) were carried out to simulate the real contact history of cam and tappet. Also, after the test, contact surfaces were analyzed with scanning electron microscope to study the wear mechanism. As a final screening, engine dynamo tests were performed. Results showed that in the block on ring sliding wear test, solid phase sintered specimens showed superior wear resistance to liquid phase sintered specimens. The component wear tests and engine dynamo tests also showed the same results. Therefore, in these tests, solid phase sintered tappet material revealed superior wear resistant properties to liquid phase sintered one.

Keywords

References

  1. SAE 901728 A Process to predict friction in an automotive valve train M. E. Crane;R. C. Meyer
  2. JASE review v.7 no.1 Research on pitting of cast iron tappets for diesel engines Y. Yamamoto;M. Yoritaka
  3. SAE 770019 I.C. engine cam and tappet wear experience R. F. Abell
  4. TRIBOLOGY HANDBOOK v.A23 M.J. Neals
  5. Journal of Tribology v.112 Tappet rotation and friction reduction in a center pivot rocker arm contact P. A. Willermet;J. M. Pieprzak;D. P. Dailey
  6. 自動車技術論文集 v.26 no.2 Experimental studies on scuffing cam and tappet M. Soejima;Y. Wakuri
  7. Proc. Instn. Mech. Engrs v.180 no.11 Influence of tappet rotation on cam and tappet surface deterioration C. F. Bona;F. G. Ghilardi