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Port of internal combustion engine

Inactive Publication Date: 2012-12-06
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]The invention thus provides a port of an internal combustion engine in which the intended characteristics of the port are

Problems solved by technology

In contrast, when the degree of variation is fairly large, the intended characteristics of the port are unable to be sufficiently obtained, so the flow of gas in the combustion chamber may not be able to be appropriately controlled.

Method used

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  • Port of internal combustion engine
  • Port of internal combustion engine
  • Port of internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

Outline of the Port

[0047]FIG. 1 is a view schematically showing the structure of a system in which ports (i.e., an intake port and an exhaust port) according to a first embodiment of the invention have been applied to an internal combustion engine 10. The internal combustion engine 10 is a four-cycle spark-ignition multiple cylinder (four cylinder) engine. FIG. 1 is a view of only the cross section of one of the plurality of cylinders. The other cylinders have the same structure as this cylinder.

[0048]This internal combustion engine 10 includes a cylinder block portion 20, a cylinder head portion 30 that is fixed to an upper portion of the cylinder block portion 20, an intake system 40 for introducing gas that is a mixture of air and fuel (i.e., an air-fuel mixture) into the cylinder block portion 20, an exhaust system 50 for discharging gas (i.e., exhaust gas) from the cylinder block portion 20 to outside of the internal combustion engine 10, an accelerator pedal 61, various sensor...

second embodiment

[0081]Next, a port according to a second embodiment of the invention will be described.

Outline of the Port

[0082]The port according to the second embodiment of the invention differs from the port according to the first embodiment described above only in that the valve seat portion has a specific mode. Therefore, the port according to the second embodiment will be described in detail focusing on this difference. In FIGS. 6 and 7 described below, members that are the same as those that make up the port according to the first embodiment will be denoted by the same reference characters as those denoting the members in the first embodiment.

[0083]FIG. 6 is an enlarged perspective view schematically showing the port 31 that is the port according to the second embodiment. Just like the intake port according to the first embodiment, the valve seat portion 31a is connected to a combustion chamber side end portion of the throat portion 31b so as to communicate the throat portion 31b with the in...

third embodiment

[0090]Next, a port according to a third embodiment of the invention will be described.

Outline of the Port

[0091]The port according to the third embodiment of the invention differs from the port according to the first embodiment described above only in that the valve seat portion has a specific mode. Therefore, the port according to the third embodiment will be described in detail focusing on this difference. In FIG. 8 described below, members that are the same as those that make up the port according to the first embodiment will be denoted by the same reference characters as those denoting the members in the first embodiment.

[0092]FIG. 8 is a view schematically showing a cross section of the combustion chamber 25, the intake port 31, and the exhaust port 35 when a region including the combustion chamber 25, the intake port 31, and the exhaust port 35 has been cut along a plane parallel to the axis of the combustion chamber 25. Moreover, in FIG. 8, an enlarged view of the area (i.e., ...

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PUM

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Abstract

A port that communicates an inside of a combustion chamber of an internal combustion engine with an outside of the combustion chamber includes a throat portion that has at least a portion of a truncated cone shape, a valve seat portion that is connected to one end portion of the throat portion to communicate the throat portion with the inside of the combustion chamber, and a passage portion that is connected to the other end portion of the throat portion to communicate the throat portion with the outside of the combustion chamber.

Description

INCORPORATION BY REFERENCE[0001]The disclosure of Japanese Patent Application No. 2011-121179 filed on May 31, 2011 including the specification, drawings and abstract is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates to a port of an internal combustion engine.[0004]2. Description of Related Art[0005]A combustion chamber of an internal combustion engine is typically communicated with the outside of the combustion chamber by an intake port so that gas that has not yet been combusted (such as air, an air-fuel mixture, or the like) can be introduced into the combustion chamber, as well as communicated with the outside of the combustion chamber by an exhaust port such that combusted gas (i.e., exhaust gas) can be discharged outside of the combustion chamber. The modes in which these gases are introduced and discharged may have a variety of effects on the characteristics of the internal combustion engi...

Claims

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Application Information

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IPC IPC(8): F01L3/00F01L3/06
CPCF02B31/00F01L1/46Y02T10/146F01L2001/0537F01L2103/00F01L3/22F01L2303/00Y02T10/12
Inventor ABE, KAZUYOSHI
Owner TOYOTA JIDOSHA KK