Patent US3579846A successfully refreshed from Google Patents.
Patent EP0056588A2 successfully refreshed from Google Patents.
EP0056588A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Internal combustion engine with bearing beam structure
Assignee: Nissan Motor Co Ltd
•
Filing: 1982-01-08
•
Granted: —
•
Expires: 2002-01-08
Abstract
Abstract An internal combustion engine (10) comprises a cylinder block (12) including a skirt section (16), and a plurality of bearing sections (22) connected to the skirt section; and a bearing beam structure (26) secured to the bottom part of the cylinder block and including a plurality of main bearing cap sections (28) each associating with each cylinder block bearing section (22) to rotatably support a crankshaft, first and second beam sections (32A, 32B) disposed to connect the main bearing cap sections with each other, and first and second side wall sections (34A, 34B) disposed to securely connect the bearing cap sections with each other respectively at their one of opposite side portions and at the other one of the opposite side portions, each side wall section (34A, 348) being securely connected at its lower part with each beam section (32A, 32B) and the its top part with the lower part of the cylinder block skirt section (16), thereby greatly improving the rigidity of the entire bearing beam structure (26), thereby effectively suppressing noise emission from the cylinder block (12).
Inventors
- 👤 Naoki Ogawa
- 👤 Kazuyuki Fujigaya
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 20:21
CPC Classifications
F; F16; F16M; F16M1/00; F16M1/02; F16M1/021; F02; F02F; F02F7/00; F02F7/0065; F02F7/008; F02F7/0043; F02F7/0053; F02F2007/0056
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
236 words
An internal combustion engine (10) comprising: a cylinder block (12) including a skirt section (16), and a plurality of bearing sections (22) integrally connected to said skirt section; and a bearing beam structure (26) secured to the bottom part of said cylinder block (12) and including a plurality of main bearing cap sections (28) each of which associates with each cylinder block bearing section (22) to rotatably support the journal of a crankshaft (24), first and second beam sections (32A,32B) disposed to securely connecting said main bearing cap sections (28) with each other, said first and second beam sections extending parallel with the axis of the crankshaft and being located spacedly along the respective opposite side portions of each bearing cap section (28), and first and second side wall sections (34A,34B) disposed to securely connecting said bearing cap sections (28) with each other respectively at their one of opposite side portions and at their another of the opposite side portions, said first side wall section (34A) being securely connected at its bottom part with said first beam section (32A) and connected at its top part with the lower part of said cylinder block skirt section (16), said second side wall section (34B) being securely connected at its bottom part with said second beam section (32B) and connected at its top part with the lower part of said cylinder block skirt section (16). (Figs. 4(5A,5B,5C,5D & 5E))
Claim 2
Dependent Claim
236 words
An internal combustion engine (10) comprising: a cylinder block (12) including a skirt section (16), and a plurality of bearing sections (22) integrally connected to said skirt section; and a bearing beam structure (26) secured to the bottom part of said cylinder block (12) and including a plurality of main bearing cap sections (28) each of which associates with each cylinder block bearing section (22) to rotatably support the journal of a crankshaft (24), first and second beam sections (32A,32B) disposed to securely connecting said main bearing cap sections (28) with each other, said first and second beam sections extending parallel with the axis of the crankshaft and being located spacedly along the respective opposite side portions of each bearing cap section (28), and first and second side wall sections (34A,34B) disposed to securely connecting said bearing cap sections (28) with each other respectively at their one of opposite side portions and at their another of the opposite side portions, said first side wall section (34A) being securely connected at its bottom part with said first beam section (32A) and connected at its top part with the lower part of said cylinder block skirt section (16), said second side wall section (34B) being securely connected at its bottom part with said second beam section (32B) and connected at its top part with the lower part of said cylinder block skirt section (16). (Figs. 4(5A,5B,5C,5D & 5E))
Claim 3
Dependent Claim
66 words
An internal combustion engine as claimed in Claim 1, wherein each of said first and second side wall sections (34A,34B) extend along the crankshaft axis from said bearing cap section located in the vicinity of one extremity of said bearing beam structure (26) to said bearing section located in the vicinity of the other opposite extremity of said bearing beam structure (26). (Figs. 4(5A,5B,5C,5D & 5E))
Claim 4
Dependent Claim
56 words
An internal combustion engine as claimed in Claim 1, wherein each of said first and second side wall sections (34A,34B) is provided at its top part with a flange (37) which is securely connected to the bottom part of said cylinder block skirt section (16), said flange extending along the crankshaft axis. (Figs. 4(5A,5B,5C,5D & 5E))
Claim 5
Dependent Claim
80 words
An internal combustion engine as claimed in Claim 2, further comprising first and second connecting sections (40A,40B) for connecting said first and second side wall sections (34A,34B) at their bottom part to form a bearing beam structure frame-like bottom surface which is continuous and integral said first and second connecting sections being integral with said bearing cap sections (28), respectively, which are located in the vicinity of the opposite extremities of said bearing beam structure (26). (Figs. 4(5A,5B,5C,5D & 5E))
Claim 6
Dependent Claim
31 words
An internal combustion engine as claimed in Claim 4, further comprising an oil pan (42) whose flange is securely connected to said bearing beam structure bottom surface. (Figs., 4(5A,5B,5C,5D & 5E)
Claim 7
Dependent Claim
65 words
An internal combustion engine as claimed in Claim 2, further comprising first and second oil seal installation portions (38) which are formed respectively integrally with said bearing cap sections (28) located in the vicinity of the respective opposite extremities of said bearing beam structure (26), said oil seal installation portion being for securely carrying an oil seal for the crankshaft (24). (Figs. 4(5A,5B,5C,5D & 5E))
Claim 8
Dependent Claim
64 words
An internal combustion engine as claimed in Claim 5, wherein said bearing beam structure (26) is generally of the shape of an isosceles trapezoids in cross-section, wherein the top part, connected to said cylinder block, of said bearing beam structure (26) being larger in width than the bottom part, connected to said oil pan, of said bearing beam structure (26). (Figs. 4(5A,5B,5C,5D & 5E)
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.