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Intake port structure for engine

An air inlet and engine technology, applied in the direction of engine components, combustion engines, machines/engines, etc., to achieve the effect of increasing the speed, strengthening the tumble flow, and improving the tumble flow ratio

Active Publication Date: 2017-09-26
MITSUBISHI MOTORS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Therefore, the technical problem underlying the invention is to enhance the tumble flow in the fuel chamber without complicating the structure.

Method used

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  • Intake port structure for engine
  • Intake port structure for engine
  • Intake port structure for engine

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Experimental program
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Embodiment Construction

[0035] Embodiments of the present invention will be described based on the drawings. Figure 1A It is an enlarged view of main parts showing the vicinity of the intake port of the engine of this embodiment. Figure 1B Yes Figure 1A modification example.

[0036] exist Figure 5A-Figure 5C It shows the arrangement of the combustion chamber 3 of the engine and the shape of the intake port 5 . The engine of this embodiment is a diesel engine for automobiles. A piston 2 is housed in a cylinder 1 of the engine. The combustion chamber 3 is formed by the inner peripheral surface of the cylinder 1, the upper surface of the piston 3, and the like. It includes: an intake passage 5 for sending intake air into the combustion chamber 3 of each cylinder; an exhaust port 7 protruding from the combustion chamber 3; a fuel injection device 9 for injecting fuel into the combustion chamber 3, and the like.

[0037] In these drawings, components and units directly related to the present inve...

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PUM

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Abstract

Tumble flow in a fuel chamber is strengthened without complicating structure. An intake port structure for an engine has an intake port (5) of an engine which is continuous with the upstream side of the inner surface of an annular seat ring (20) in the intake port (5), the inner surface of the intake port is provided with an inner-surface-matching part (32) that, in plan view along the axial direction of the seat ring (20) from a combustion chamber (3) side, is flush with the inner surface of the seat ring (20) on the rear end side farther from the axial center of a cylinder bore, and any other portion is provided with a projecting part (31) that protrudes farther inward than the inner surface of the seat ring (20).

Description

technical field [0001] The present invention relates to an intake port structure of an engine capable of achieving good combustion in a combustion chamber. Background technique [0002] Heretofore, various technologies have been known: in the combustion chamber of the engine, swirl flow—tumble flow (longitudinal vortex) flowing along the axial direction of the cylinder bore; Swirling flow to flow - various technologies generated by vortex (horizontal vortex). [0003] As a technique for generating tumble flow, there is, for example, changing the degree of shielding in the intake port by using an intake flow control valve provided in the intake port to generate tumble flow (see, for example, Patent Document 1 below). In addition, air is jetted downward from a nozzle provided in the intake port along the wall surface of the valve throat to generate a tumble flow (see, for example, Patent Document 2 below). [0004] In addition, in order to enhance the tumble flow, there is a...

Claims

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Application Information

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IPC IPC(8): F02F1/42F02B31/00F01L3/06
CPCF01L3/06F02B31/00F02F1/42Y02T10/12
Inventor 森冈辽吉川智干场义幸
Owner MITSUBISHI MOTORS CORP