Claims
- 1. A cylinder block having opposite ends comprising:
- a skirt section having oppositely disposed first and second walls;
- a transmission installation section to which a transmission is to be securely connected, said transmission installation section being located at one of said ends of the cylinder block; and
- noise and vibration reducing means comprising first and second reinforcement ribs which are respectively formed integrally with said skirt section first and second walls, each reinforcement rib being located on an outer surface of the respective skirt section wall and projecting outwardly, each reinforcement rib extending generally along the axis of a crankshaft and located generally at the same level as the crankshaft axis, each reinforcement rib having a first end connected to said transmission installation section and a second end located in a vicinity of the other end of the cylinder block, wherein each reinforcement rib has a lower surface spaced from a bottom surface of each skirt section wall and is located above a level of bottom surface of the skirt section and being free from any surface contact between the ends of each rib.
- 2. A cylinder block as claimed in claim 1, wherein each reinforcement rib has the shape of a flange.
- 3. A cylinder block as claimed in claim 2, wherein each reinforcement rib is formed so that its thickness and width gradually decrease from the one end toward the other end of said cylinder block.
- 4. A cylinder block as claimed in claim 1, further comprising a bearing beam structure including a plurality of bearing cap sections, each of which is secured to a bearing support section integral with said skirt section, said crankshaft being rotatably supported by each bearing support section and each bearing cap section being secured to each other and also to a beam section which securely connects said plurality of bearing cap sections with each other, said beam section extending along the axis of said crankshaft.
- 5. A cylinder block as claimed in claim 4, wherein said beam section is integral with said plurality of bearing cap sections.
Priority Claims (2)
Number |
Date |
Country |
Kind |
55-142991[U] |
Oct 1980 |
JPX |
|
55-142989[U] |
Oct 1980 |
JPX |
|
Parent Case Info
This is a division of application Ser. No. 309,386, filed Oct. 7, 1981, now U.S. Pat. No. 4,452,192.
US Referenced Citations (5)
Foreign Referenced Citations (4)
Number |
Date |
Country |
0054474 |
Jun 1982 |
EPX |
0074120 |
Mar 1983 |
EPX |
2839885 |
Apr 1979 |
DEX |
0613072 |
Nov 1960 |
ITX |
Non-Patent Literature Citations (2)
Entry |
ATZ Automobiltechnische Zeitschrift, vol. 78, No. 10, Oct. 1976, pp. 423-426, F. Hauk et al., "Der erste serienmassige Reihen-Fuenfzylinder-Ottomotor fuer Personenwagen-eine Entwicklung von Audi Nsu". |
Japanese Textbook published Feb. 15, 1979 by Kabushiki Kaisha "Sankaido", (Sankaido Company, Ltd.), Author: The Zenkoku Jidosha Seibi Gakko Renmi, (Japanese Automotive Vehicle Servicing School Federation), Gasoline Engine Construction, pp. 24 and 25. |
Divisions (1)
|
Number |
Date |
Country |
Parent |
309386 |
Oct 1981 |
|