Internal-combustion engines – Cooling – With jacketed head and/or cylinder
Patent
1982-05-26
1985-01-22
Lall, Parshotam S.
Internal-combustion engines
Cooling
With jacketed head and/or cylinder
123193CH, 277235B, F02F 1100, F16J 1502
Patent
active
044944918
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION AND PRIOR ART STATEMENT
This invention relates to a liquid-cooled internal combustion engine, and more particularly it is concerned with sealing means for sealing between a cylinder and a cylinder head of the liquid-cooled internal combustion engine.
In a liquid-cooled internal combustion engine including a cylinder and a cylinder head each provided with an inner shell and an outer shell, the cylinder and the cylinder head being connected to each other to provide cooling liquid chambers defined by the outer shells and the inner shells of the cylinder and the cylinder head while a combustion chamber is formed by the inner shells of the cylinder and the cylinder head, it is necessary that surfaces of contact between the cylinder and cylinder head be sealed to avoid leaking of gas from the combustion chamber and leaking of cooling liquid from the cooling liquid chambers. To this end, sealing means has hitherto been provided between the cylinder and cylinder head, to avoid leaking of gas and cooling liquid. This type of sealing means of the prior art has, however, had the disadvantage that difficulties are encountered in positively avoiding, in particular, the leaking of gas from the combustion chamber, and also had the disadvantage that the production cost of the sealing means itself is high or that the production cost of the cylinder or the cylinder head is increased due to the provision of the sealing means. Also, there has hitherto been the danger that some of the sealing means interfere with normal combustion in the internal combustion engine.
FIGS. 1 to 3 show liquid-cooled internal combustion engines provided with this type of sealing means of the prior art. In order to clarify the aforesaid disadvantages of the prior art, the liquid-cooled internal combustion engines of the prior art will be described by referring to FIGS. 1 to 3.
The liquid-cooled internal combustion engine shown in FIG. 1 comprises a cylinder 1 and a cylinder head 6. The cylinder 1 is provided with an inner shell 3 and an outer shell 5, and the cylinder head 6 is also provided with an inner shell 8 and an outer shell 10. The cylinder head 6 is connected at its lower end surface to the upper end surface of the cylinder 1 through sealing means comprising gasket 14. The inner shells 3 and 8 of the cylinder 1 and cylinder head 6 respectively define a combustion chamber 2, and a portion of the combustion chamber 2 defined by the inner shell 8 of the cylinder head 6 forms an upper combustion chamber 7. Moreover, the inner shells 3 and 8 and the outer shells 5 and 10 of the cylinder 1 and the cylinder head 6 respectively define cooling liquid chambers 4 and 9 communicating with each other.
As shown in FIG. 2, the gasket 14 is formed of an annular asbestos plate 12 which has core bars 11 embedded therein and grommets 13 of stainless steel wound around the inner and outer peripheries thereof. The gasket 14 of this construction is arranged between the end surfaces of the cylinder 1 and cylinder head 6, and the contacting surfaces of the cylinder 1 and cylinder head 6 are sealed by the gasket 14 as the cylinder 1 and cylinder head 6 are fastened together by bolts 15.
The liquid-cooled internal combustion engine shown in FIG. 3 is similar to that shown in FIG. 1 in that it includes the cylinder 1 having the inner shell 3 and outer shell 5, the cylinder head 6 having the inner shell 8 and outer shell 10, the combustion chamber 2, its upper combustion chamber 7, cooling liquid chambers 4 and 9, the bolts 15 etc. However, in the construction shown in FIG. 3, annular grooves 16 are formed on the upper end surfaces of the inner shell 3 and outer shell 5 respectively of the cylinder 1 and have fitted therein sealing means comprising O-rings 17 formed of heat resisting rubber and having a thickness large enough to enable the rings to project outwardly from the grooves 16. The O-rings 17 are held between the end surfaces of the cylinder 1 and cylinder head 6 by the clamping force exerted by the bolts 15, to thereby provide a
REFERENCES:
patent: 2972341 (1961-02-01), Forst
patent: 3340774 (1967-09-01), Brenneke
patent: 3410256 (1968-11-01), Herschmann
patent: 3628427 (1971-12-01), Bailey
patent: 3843141 (1974-10-01), Kuhn
Takada Toshiyuki
Tamba Shinichi
Kawasaki Jukogyo Kabushiki Kaisha
Lall Parshotam S.
Wolfe W. R.
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