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Intake port structure of internal combustion engine

一种内燃发动机、进气口的技术，应用在内燃活塞发动机、燃烧发动机、发动机控制等方向，能够解决限制内燃发动机排放效果等问题，达到排放量减少、稳定涡流的效果

Inactive Publication Date: 2009-02-25
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, unless the swirl can be stably generated, the retardation of the ignition timing is correspondingly limited, and as a result, the emission effect of the internal combustion engine is inevitably limited

Method used

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  • Intake port structure of internal combustion engine
  • Intake port structure of internal combustion engine
  • Intake port structure of internal combustion engine

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Experimental program
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Embodiment Construction

[0026] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Figure 1A to Figure 1E is a view schematically showing the intake port structure 100A and the intake port structure 100AX according to the first embodiment of the present invention. Specifically, Figure 1A is a view showing the intake port structure 100A and the cylinder block 51 , the cylinder head 52A, and the piston 53A which are main components of the internal combustion engine 50A. Figure 1B is an enlarged view showing the intake port structure 100A in a state where the airflow control valve 1A is fully opened. Figure 1C is an enlarged view showing the intake port structure 100A in a fully closed state of the airflow control valve 1A. Figure 1D It is an enlarged view showing the intake port structure 100A in a state where the airflow control valve 1A is replaced by the airflow control valve 1X. Figure 1E It is a view showing the app...

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PUM

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Abstract

An intake port structure of an internal combustion engine includes an intake port (10A), a valve shaft (2) provided in proximity to an inner wall of the intake port, and an airflow control valve (IA) having a proximal end which is pivotally supported on the valve shaft (2) and a distal end which becomes part of the inner wall of the intake port when the airflow control valve is fully opened. The inner wall of the intake port has a recess into which the airflow control valve is partially or entirely retracted when the airflow control valve is fully opened. The recess has a flow smoothing portion located downstream of the proximal end.

Description

technical field [0001] The present invention relates to an air intake structure of an internal combustion engine, and more particularly, the present invention relates to an air intake structure of an internal combustion engine comprising an air flow control valve at It is pivotally supported near the inner wall of the air inlet at its proximal end. Background technique [0002] A known air intake structure of an internal combustion engine comprises a flow control valve which generates vortices, such as tumble flows (longitudinal vortex) and swirl flows (transverse vortex). This vortex facilitates the mixing of fuel and air and helps the flame to spread in the combustion chamber, thus improving the combustion efficiency. In addition, by using such a swirl, it is possible to concentrate a rich air-fuel mixture around each spark plug and perform stratified combustion. Among these air intake structures, there is known an air intake structure in which the airflow control valve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B31/06
CPCY02T10/146Y02T10/125F02D9/1015F02D9/104F02D9/103F02B2275/48F02B31/06Y02T10/12
Inventor 阿部和佳吉松昭夫
Owner TOYOTA JIDOSHA KK
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