EP0048028A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Low noise level automotive internal combustion engine
Assignee: Nissan Motor Co Ltd
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Filing: 1981-09-16
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Granted: —
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Expires: 2001-09-16
Abstract
Abstract An automotive internal combustion engine (10) comprises a cylinder block (12) formed at its bottom section with a plurality of main bearing carrying sections (16), a plurality of main bearing caps (18) respectively secured to the main bearing carrying sections, and a beam member (24) formed of a sheet metal and disposed to rigidly connect all the main bearing caps (18), thereby effectively suppressing the vibration of the main bearing caps to greatly decrease engine noise emission.
Inventors
- 👤 Yoshimasa Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 17:25
CPC Classifications
F; F02; F02F; F02F7/00; F02F7/0065; F02F7/008
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
90 words
An automotive internal combustion engine (10) comprising: a cylinder block (12) formed at its bottom section with a plurality of main bearing carrying sections (16); a plurality of main bearing caps (18) secured respectively to said main bearing carrying sections so that the secured main bearing carrying section (16) and the main bearing cap (18) define a cylindrical opening (22) for receiving a crankshaft; and- a beam member (24) formed of a sheet metal and disposed to rigidly connect all said main bearing caps (18). (Figs. 3(4), 5, & 6)
Claim 2
Dependent Claim
90 words
An automotive internal combustion engine (10) comprising: a cylinder block (12) formed at its bottom section with a plurality of main bearing carrying sections (16); a plurality of main bearing caps (18) secured respectively to said main bearing carrying sections so that the secured main bearing carrying section (16) and the main bearing cap (18) define a cylindrical opening (22) for receiving a crankshaft; and- a beam member (24) formed of a sheet metal and disposed to rigidly connect all said main bearing caps (18). (Figs. 3(4), 5, & 6)
Claim 3
Dependent Claim
41 words
An automotive internal combustion engine as claimed in Claim 1, wherein the beam member sheet metal (24) is in the shape wherein the rigidity thereof is higher than in the flat state of the sheet metal. (Figs. 3(4), 5, & 6)
Claim 4
Dependent Claim
60 words
An automotive internal combustion engine as claimed in Claim 1, wherein said beam member (24) includes a channel section (26) having a ridge which elongates parallelly with the axis of said cylinder block, said ridge being formed by bending a sheet metal along the a straight line parallel with the axis of the cylinder block. (Figs. 3(4), 5, & 6)
Claim 5
Dependent Claim
36 words
An automotive internal combustion engine as claimed in Claim 3, wherein said channel section (26) has a V-shaped cross-section, said channel section elongating parallelly with the axis of said cylinder block. (Figs. 3(4), 5, & 6)
Claim 6
Dependent Claim
60 words
An automotive internal combustion engine as claimed in Claim 4, wherein said beam member (24) further includes a plurality of attachment flange sections (28) which are aligned in two rows and integral with said channel sections (26), said beam member (24) being secured at its two opposite attachment flange sections to each main bearing cap. (Figs. 3(4), 5, & 6)
Claim 7
Dependent Claim
37 words
An automotive internal combustion engine as claimed in Claim 3, further comprising a damping member (30) made of a material high in damping capacity, and securely disposed inside of said channel section (26) of said beam member.
Claim 8
Dependent Claim
3 words
(Figs. 3(4), 5)
Claim 9
Dependent Claim
3 words
(Figs. 3(4), 5)
Claim 10
Dependent Claim
66 words
An automotive internal combustion engine as claimed in Claim 4, wherein further comprising an elongate reinforcing member (32) which includes a channel section (32a) having a generally C-shaped cross-section which channel section contacts said beam member channel section and extends along said channel section of said beam member, and a plurality of attachment flange sections (32b) which contact respectively said beam member attachment flange sections (28).
Claim 11
Dependent Claim
2 words
(Fig. 5)
Claim 12
Dependent Claim
2 words
(Fig. 5)
Claim 13
Dependent Claim
50 words
An automotive internal combustion engine as claimed in Claim 5, further comprising bolts (34) for securing the flange sections of said beam member, which bolts (34) are other than bolts (20) for securing each main bearing cap to the corresponding main bearing carrying section of said cylinder block. (Fig. 6)
References Cited (Backward Citations)
No citation records indexed.
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