Internal-combustion engines – Combustion chamber means having fuel injection only – Air entering combustion chamber through plural inlets
Patent
1995-12-21
1996-12-10
McMahon, Marguerite
Internal-combustion engines
Combustion chamber means having fuel injection only
Air entering combustion chamber through plural inlets
123661, F02B 2308, F02B 2300
Patent
active
055821472
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a combustion chamber for an internal combustion engine and, more particularly, to a combustion chamber configuration which can enhance engine output by reducing a combustion time.
2. Description of Related Art
In general, many schemes of a combustion chamber configuration have been proposed to increase engine output.
Since the engine output depends on a combustion state of the engine, a combustion chamber should be configured such that a distance of flame propagation can be shortened to accomplish fast burn, thereby increasing compression ratio and enabling ignition advancement.
To shorten the distance of the flame propagation, it is desirable to make the combustion chamber compact. Therefore, to make the combustion chamber compact, it is preferable to change the configuration of the bottom surface of a cylinder head which defines the combustion chamber with a cylinder block and a piston head.
That is, it is desirable to design the bottom surface of the cylinder head to give rise tea squish flow. It is also desirable to properly change the position of an ignition plug in accordance with design of the combustion chamber.
However, although the configuration of the combustion chamber has an effect on engine output, thermal efficiency, exhaust gas, and the like, it is impossible to obtain good characteristic in the all aspects. Accordingly, the configuration of the combustion chamber is to be designed in accordance with a design purpose or a type of the engine.
If an element which disturbs the flow of the gases exists in the engine, powerful turbulence cannot be generated such that the combustion ratio is deteriorated.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a combustion chamber for an internal combustion engine having multiple valves which can shorten the distance of flame propagation and generate the powerful turbulence such that the combustion time can be reduced.
To achieve the above object, the present invention provides a combustion chamber for an internal combustion engine having multiple valve, comprising: a cylinder block; a piston reciprocating in said cylinder block; a cylinder head defining the combustion chamber with said cylinder block and said piston; a roof defined on a bottom surface of the cylinder head; first, second, third and fourth quadrants which are defined on said roof by ordinate and abscissa axes which pass through a center point of the roof; a sparking plug mounting hole formed on the first quadrant; an exhaust port formed on the second quadrant; a first intake port formed on the third quadrant; a second intake port formed on the fourth quadrant; a first squish area formed over the third and fourth quadrants; and a second squish area formed over the first and second quadrants.
BRIEF DESCRIPTION OF THE INVENTION
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate an embodiment of the invention, and together with the description, serve to explain the principles of the invention.
FIG. 1 is a sectional view showing a cylinder head of an internal combustion engine to which a combustion chamber according to the present invention can be adapted;
FIG. 2 is a bottom plan view of the cylinder head of FIG. 1 where a roof of a combustion chamber according to a first embodiment of the present invention is shown;
FIG. 3 is a sectional view taken alone the line A--A of FIG. 2;
FIG. 4 is a three dimensional view showing the roof of the combustion chamber according to the first embodiment of the present invention;
FIG. 5 is a view showing a roof of a combustion chamber according to a second embodiment of the present invention;
FIG. 6 is a view showing a roof of a combustion chamber according to a third embodiment of the present invention; and
FIG. 7 is a view showing a roof of a combustion chamber according to a fourth embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to FIG.
REFERENCES:
patent: 4763622 (1988-08-01), Indra et al.
patent: 4972814 (1990-11-01), Matsuki et al.
patent: 5207210 (1993-05-01), Yamagata et al.
Hyundai Motor Company
McMahon Marguerite
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