Internal-combustion engines – Cooling – With jacketed head and/or cylinder
Reexamination Certificate
2000-03-21
2001-10-02
Argenbright, Tony M. (Department: 3747)
Internal-combustion engines
Cooling
With jacketed head and/or cylinder
C123S193200
Reexamination Certificate
active
06295954
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to cylinder blocks for water-cooled internal combustion engines, and more specifically to cylinder blocks of a closed deck type.
In general, a cylinder block for a water-cooled engine is a single casting including a cylinder wall forming cylinder bores, and a water jacket wall forming a water jacket. Specifically, the casting process of cost-advantageous cast iron (gray iron) using sand cores is often employed for a closed deck type cylinder block having a top deck covering the water jacket to improve the sealing of a cylinder head gasket.
Japanese Patent Kokai Publications Nos. 10311242 (published on Nov. 24, 1998) and 08028342 (published on Jan. 30, 1996) show cylinder blocks having head bolt bosses receiving cylinder head bolts joining a cylinder head on top of a top deck.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a cylinder block designed to prevent stress concentration specifically around a cylinder head bolt boss.
According to the present invention, a cylinder block for a water-cooled internal combustion engine, comprises:
a row of cylinder wall sections each defining a cylinder bore;
a water jacket wall defining a water jacket around the row;
a top deck connecting upper ends of the cylinder wall sections and an upper end of the water jacket wall and thereby defining an upper end of the water jacket;
a head bolt boss having a cylinder head bolt hole, the head bolt boss being formed in the water jacket wall; and
a rib formed between the head bolt boss located at an end of the cylinder block and an adjacent one of the cylinder wall sections, and connected with the head bolt boss, the top deck, and the adjacent one of the cylinder wall sections.
According to another aspect of the present invention, a cylinder block for a water-cooled internal combustion engine, comprises: a top deck; a cylinder wall structure extending underneath the top deck and defining a row of cylinder bores; and a jacket wall structure extending underneath the top deck and defining a water jacket around the cylinder wall structure. The jacket wall structure comprises:
a jacket wall comprising first and second end wall sections, and first and second side wall sections, the first end wall section being located between a first longitudinal end of the cylinder block and the row of the cylinder bores, the second end wall section being located between a second longitudinal end of the cylinder block and the row of the cylinder bores, the first and second side wall sections extending from the first end wall section to the second end wall section along the row, the first side wall section being on a first side of the row, and the second side wall section being on a second side of the row opposite to the first side;
intermediate head bolt bosses formed in the first and second side wall sections of the jacket wall, each intermediate head bolt bosses having a cylinder head bolt hole; and
at least one terminal head bolt boss having a cylinder head bolt hole, the terminal head bolt boss being formed in the first end wall section, and connected with the cylinder wall structure by a rib extending from the top deck.
REFERENCES:
patent: 2507034 (1950-05-01), Martin
patent: 2853062 (1958-09-01), Barr et al.
patent: 4066057 (1978-01-01), Hale
patent: 4237847 (1980-12-01), Baugh et al.
patent: 4520768 (1985-06-01), Shimonosono et al.
patent: 6024056 (2000-02-01), Hojyo et al.
patent: 08-028342 (1996-01-01), None
patent: 10-311242 (1998-11-01), None
Argenbright Tony M.
Foley & Lardner
Harris Katrina B.
Nissan Motor Co,. Ltd.
LandOfFree
Cylinder block for water-cooled engine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cylinder block for water-cooled engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cylinder block for water-cooled engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2607554