Bearing arrangements for balancing shafts of internal combustion engines
An internal combustion engine is described including cylinder block means having inner wall means defining at least one cylinder bore, outer wall means provided outside the inner wall means and defining cooling water jacket means with the inner wall means, deck means provided below and continuous with the outer wall means to provide at least partly an upper part of crankcase means, a piston disposed in the cylinder bore for reciprocating movements, crankshaft means disposed in the crankcase means and connected with the piston means so that a reciprocating movement of the piston is converted into a rotation of the crankshaft means, balancing shaft means supported by the cylinder block means in parallel with the crankshaft means and having eccentric mass means, the balancing shaft means being rotated to counterbalance effects of reciprocating mass in the cylinder block means. The cooling water jacket means has a lower end located above the deck means, the inner wall means having downward extension means extending downwardly beyond the deck means, the downward extension means and the upper part of the crankcase means defining balancing shaft cases means. The balancing shaft means are located in the balancing shaft case means, the balancing shaft means being supported by bearing means formed in the upper part of the crankcase means at least partly defined by the deck means. The eccentric mass means are located in the cylinder block means and housed at least partly in the balancing shaft case means.
- Assignee:
- Mazda Motor Corp., Hiroshima
- Patent Number(s):
- US 4690111
- OSTI ID:
- 6096648
- Resource Relation:
- Patent File Date: Filed date 28 Oct 1985
- Country of Publication:
- United States
- Language:
- English
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