초록 ▼

An improved lubricating oil passage structure for an engine, which includes: a sub-gallery and a main gallery positioned adjacent to one another in a cylinder block; a head-side oil passage and a journal-side oil passage both being communicated to the main gallery and provided in the cylinder block,

An improved lubricating oil passage structure for an engine, which includes: a sub-gallery and a main gallery positioned adjacent to one another in a cylinder block; a head-side oil passage and a journal-side oil passage both being communicated to the main gallery and provided in the cylinder block, in which the head-side oil passage is led to an upper surface of the cylinder block, while the journal-side oil passage is inclined so as be oriented toward a journal portion of a crankshaft; a housing-side oil passage communicated to the journal-side oil passage, the housing-side oil passage being provided in a journal housing section of the cylinder block by the use of a spot facing for a housing bolt, the journal housing section supporting the journal portion; a metal-side oil passage communicated to the housing-side oil passage, the metal-side oil passage being provided in the journal housing section at the rear of a journal metal disposed between the journal portion and the journal housing section; and, a chain adjuster-side oil passage communicated to the metal-side oil passage.

대표청구항 ▼

[ What is claimed is:] [1.] In a lubricating oil passage structure for an engine having a crankshaft rotatably supported on a cylinder block of the engine, a connecting rod provided in said cylinder block, a larger end portion of said connecting rod connected to said crankshaft, a smaller end portio

[ What is claimed is:] [1.] In a lubricating oil passage structure for an engine having a crankshaft rotatably supported on a cylinder block of the engine, a connecting rod provided in said cylinder block, a larger end portion of said connecting rod connected to said crankshaft, a smaller end portion of said connecting rod linked to a piston, said piston being reciprocably supported in a cylinder of said cylinder block through a sleeve, an oil filter mounted on a filter-mounting surface at an outer surface of said cylinder block, and a sub-gallery and a main gallery, both of said galleries provided in said cylinder block, in which said sub-gallery permits oil fed under pressure from an oil pump to be guided to said oil filter, and said main gallery distributes the oil from said oil filter to sections of said engine, the improvement comprising: said sub-gallery and said main gallery being provided adjacent one another in said cylinder block; a head-side oil passage and a journal-side oil passage both being in communication with said main gallery and provided in said cylinder block, said head-side oil passage is led to an upper surface of said cylinder block, said journal-side oil passage is slanted so as to be oriented toward a journal portion of said crankshaft; a housing-side oil passage in communication with said journal-side oil passage, said housing-side oil passage being provided in a journal housing section of said cylinder block by a spot facing for a housing bolt, said journal housing section supporting said journal portion; a metal-side oil passage in communication with said housing-side oil passage, said metal-side oil passage being provided in said journal housing section at the rear of a journal metal disposed between said journal portion and said journal housing section; and, a chain adjuster-side oil passage in communication with said metal-side oil passage, said chain adjuster-side oil passage being provided in said cylinder block.