Numerical study on reducing methods of static strain along the fillet on upper deck of diesel engine cylinder block

Katsuyuki Iguchi, Naoya Tada, Ichiro Shimizu, Kouji Iwasaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Large static strain appears on the fillet on upper deck of diesel engine cylinder block by tightening force of cylinder head bolts. Reducing static strain is necessary to avoid the crack initiation on the fillet. The static strain along the fillet can be reduced, for example, by modifying the depth of thread engagement, and modifying the bead shape and position into the bore grommet of cylinder head gasket. In the present study, the depth of thread engagement was optimized considering four conditions, the overall magnitude of strain, the circumferential fluctuation of strain, the change rate of strain against the depth of thread engagement, and the length of cylinder head bolt. The bead shape or position was optimized considering two conditions, the overall magnitude of strain, and the distribution of contact pressure on the contact area with the cylinder block and the cylinder liner. The analysis results of the circumferential distribution of static strain were agreed with the measurement results. The optimum depth of thread engagement of cylinder head bolt and the optimum type of the cylinder head gasket were evaluated using FEM.

Original languageEnglish
Title of host publication12th International Conference on Fracture 2009, ICF-12
Pages787-796
Number of pages10
Volume1
Publication statusPublished - 2009
Event12th International Conference on Fracture 2009, ICF-12 - Ottawa, ON, Canada
Duration: Jul 12 2009Jul 17 2009

Other

Other12th International Conference on Fracture 2009, ICF-12
CountryCanada
CityOttawa, ON
Period7/12/097/17/09

Fingerprint

Cylinder blocks
diesel engine
Engine cylinders
Diesel engines
Cylinder heads
bolt
Bolts
Bolt tightening
method
liner
Crack initiation
crack
Finite element method

Keywords

  • Cylinder block
  • Diesel engine
  • Finite element method
  • Fixing
  • Optimum design
  • Stress concentration

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

Cite this

Iguchi, K., Tada, N., Shimizu, I., & Iwasaki, K. (2009). Numerical study on reducing methods of static strain along the fillet on upper deck of diesel engine cylinder block. In 12th International Conference on Fracture 2009, ICF-12 (Vol. 1, pp. 787-796)

Numerical study on reducing methods of static strain along the fillet on upper deck of diesel engine cylinder block. / Iguchi, Katsuyuki; Tada, Naoya; Shimizu, Ichiro; Iwasaki, Kouji.

12th International Conference on Fracture 2009, ICF-12. Vol. 1 2009. p. 787-796.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Iguchi, K, Tada, N, Shimizu, I & Iwasaki, K 2009, Numerical study on reducing methods of static strain along the fillet on upper deck of diesel engine cylinder block. in 12th International Conference on Fracture 2009, ICF-12. vol. 1, pp. 787-796, 12th International Conference on Fracture 2009, ICF-12, Ottawa, ON, Canada, 7/12/09.
Iguchi K, Tada N, Shimizu I, Iwasaki K. Numerical study on reducing methods of static strain along the fillet on upper deck of diesel engine cylinder block. In 12th International Conference on Fracture 2009, ICF-12. Vol. 1. 2009. p. 787-796
Iguchi, Katsuyuki ; Tada, Naoya ; Shimizu, Ichiro ; Iwasaki, Kouji. / Numerical study on reducing methods of static strain along the fillet on upper deck of diesel engine cylinder block. 12th International Conference on Fracture 2009, ICF-12. Vol. 1 2009. pp. 787-796
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AB - Large static strain appears on the fillet on upper deck of diesel engine cylinder block by tightening force of cylinder head bolts. Reducing static strain is necessary to avoid the crack initiation on the fillet. The static strain along the fillet can be reduced, for example, by modifying the depth of thread engagement, and modifying the bead shape and position into the bore grommet of cylinder head gasket. In the present study, the depth of thread engagement was optimized considering four conditions, the overall magnitude of strain, the circumferential fluctuation of strain, the change rate of strain against the depth of thread engagement, and the length of cylinder head bolt. The bead shape or position was optimized considering two conditions, the overall magnitude of strain, and the distribution of contact pressure on the contact area with the cylinder block and the cylinder liner. The analysis results of the circumferential distribution of static strain were agreed with the measurement results. The optimum depth of thread engagement of cylinder head bolt and the optimum type of the cylinder head gasket were evaluated using FEM.

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