Cylinder block structure

Details Cylinder block structure Cylinder block structure

1999-01-04

2000-08-15

Kwon, John

Internal-combustion engines

Frame construction

Horizontal cylinder

123 4172, F02F 700

Patent

active

061019941

ABSTRACT:
An aluminum cylinder block (1) of an engine has a plurality of cylinder bores (2), and intermediate marginal areas (17) defined between adjacent cylinder bores (2). A single water jacket (8) is formed in the cylinder block (8) to surround the plurality of cylinder bores (2), and a plurality of oil chutes (15) are also formed in the cylinder block (1) outside the water jacket (8) for allowing an oil to drop from a cylinder head (5) to a crankcase (14) therethrough. These oil chutes (15) are formed between adjacent intermediate marginal areas (17) so that they do not make the cylinder block (1) swell out. An air in the oil chutes (15) functions as a sound insulation layer against combustion noises generated in the cylinder bores (2). The air in the oil chutes (15) also serves as a heat insulation layer for a cooling water in the water jacket (8) so that warming up performance of the engine under a cold condition is improved.

REFERENCES:
patent: 4515112 (1985-05-01), Tsuchiya et al.
patent: 4686943 (1987-08-01), Anno et al.
patent: 4702204 (1987-10-01), Anno et al.
patent: 4712517 (1987-12-01), Anno et al.
patent: 5842447 (1998-12-01), Krotky et al.

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