JPH0469640U

JPH0469640U -

Info

Publication number: JPH0469640U
Application number: JP11150190U
Authority: JP
Priority date: 1990-10-24
Filing date: 1990-10-24
Publication date: 1992-06-19

Description

[Brief explanation of the drawing]

第１図は本考案実施例による吸気装置における
吸気通路の構造を示す模式的な断面図、第２図は
第１図に示した吸気通路の境界部の面を得るため
のパラメータを説明するための模式図、第３図は
第１図に示した吸気通路構造と従来構造のロータ
リ弁による吸気量の変化についての比較結果を説
明するための線図、第４図は第３図に示した比較
結果を別な条件下で比較した場合の結果を説明す
るための線図、第５図は従来の吸気装置の全体構
成を示す断面図、第６図は第４図に示した吸気装
置に用いられる吸気通路の一構造例を示す模式的
な断面図である。１……エンジン本体、１Ａ……シリンダヘツド
、２……ポペツト弁、３……吸気通路をなすイン
テークマニホールド、３Ａ……ハウジング、３Ａ
１……円弧部、４……ロータリ弁、４Ａ１……弁
板、１１……境界部、Ｒ１……境界部の面の半径
。 FIG. 1 is a schematic cross-sectional view showing the structure of the intake passage in the intake device according to the embodiment of the present invention, and FIG. 2 is for explaining the parameters for obtaining the boundary surface of the intake passage shown in FIG. 1. Fig. 3 is a diagram to explain the comparison results of the intake passage structure shown in Fig. 1 and the change in intake air amount due to the conventional rotary valve structure, Fig. 4 is the diagram shown in Fig. 3. A line diagram for explaining the comparison results under different conditions. Figure 5 is a sectional view showing the overall configuration of a conventional intake system. Figure 6 is a diagram showing the overall configuration of a conventional intake system. FIG. 3 is a schematic cross-sectional view showing an example of the structure of an intake passage used. 1...Engine body, 1A...Cylinder head, 2...Poppet valve, 3...Intake manifold forming the intake passage, 3A...Housing, 3A
1... Arc part, 4... Rotary valve, 4A1... Valve plate, 11... Boundary part, R1... Radius of surface of boundary part.

Claims

[Scope of Claim for Utility Model Registration] A poppet valve that opens and closes an intake port communicating with a combustion chamber, and a rotary valve that is located upstream of the poppet valve in the intake direction and is rotatable to open and close the intake passage. and a phase having a structure in which the support shaft of the rotary valve is used as an output shaft, and the crank rotational force of the engine is transmitted to the output shaft as an input, and the rotational phase of the output shaft is changed with respect to the crank rotational phase. In an intake system for an automobile engine comprising a variable mechanism and a drive unit that changes the rotational phase of the output shaft in the variable phase mechanism, the structure of the intake passage in which the rotary valve is located includes a rotation locus of the rotary valve. It has a structure in which a circular arc part with an inner diameter that provides the same internal diameter is connected to the boundary part of the intake passage connected to this circular arc part. The inner diameter is set so that the rotation locus of the valve can be obtained, and the boundary part is centered at a position opposite to the center position of the radius for forming the circular arc part with the opening start position of the rotary valve in between. An intake device for an automobile engine, characterized in that the surface has a radius that forms an arc connecting the valve opening start position and the intake passage.