JPS6451732U

JPS6451732U -

Info

Publication number: JPS6451732U
Application number: JP14626787U
Authority: JP
Priority date: 1987-09-25
Filing date: 1987-09-25
Publication date: 1989-03-30

Description

[Brief explanation of the drawing]

第１図は従来の二次空気導入装置を備えた内燃
機関の出力特性を示す図、第２図ないし第８図は
本考案の一実施例を説明するための図であつて、
第２図は出力特性を示す図、第３図は縦断面図、
第４図は第３図の―線に沿う矢視図、第５図
は第４図の―線に沿う矢視図、第６図は二次
空気導入装置の概略図、第７図はクラツチ機構を
構成する各部材の組立前の斜視図、第８図はクラ
ツチ機構の作動手段を示す平面図である。１…シリンダ、３…ピストン、４…燃焼室、７
…クランクシヤフト、１０…吸気バルブ、１１…
排気バルブ、１２…カムシヤフト、１８ａ，１８
ｂ…二次空気導入孔、２０…クラツチ機構、２９
…制御手段、Ｐ_１…第１のエアポンプ、Ｐ_２…第
２のエアポンプ。 FIG. 1 is a diagram showing the output characteristics of an internal combustion engine equipped with a conventional secondary air introduction device, and FIGS. 2 to 8 are diagrams for explaining an embodiment of the present invention,
Figure 2 is a diagram showing the output characteristics, Figure 3 is a longitudinal cross-sectional view,
Figure 4 is a view along the line - in Figure 3, Figure 5 is a view along the line - in Figure 4, Figure 6 is a schematic diagram of the secondary air introduction device, and Figure 7 is the clutch. FIG. 8 is a perspective view of each member constituting the mechanism before assembly, and a plan view showing the actuating means of the clutch mechanism. 1...Cylinder, 3...Piston, 4...Combustion chamber, 7
...Crankshaft, 10...Intake valve, 11...
Exhaust valve, 12...Camshaft, 18a, 18
b... Secondary air introduction hole, 20... Clutch mechanism, 29
...control means, _P1 ...first air pump, _P2 ...second air pump.

Claims

[Claims for Utility Model Registration] An intake valve in which a combustion chamber is formed above the top dead center of a piston that is slidably fitted in a cylinder, and that operates in synchronization with the rotation of a crankshaft to which the piston is connected. and an exhaust valve, a secondary air introduction hole formed in the inner wall of the cylinder and opened and closed by the piston, and an air pump that pumps secondary air into the cylinder from the secondary air introduction hole. An internal combustion engine equipped with a secondary air introduction device includes at least two air pumps, a clutch mechanism that is connected to these air pumps and transmits and shuts off driving force to each air pump, and a clutch mechanism that transmits driving force to each air pump and shuts off the driving force. The clutch is configured to drive one air pump when the rotation is in the middle rotation range, drive all the air pumps when the rotation is in the medium rotation range, and stop driving all the air pumps when the rotation is in the high rotation range. An internal combustion engine equipped with a secondary air introduction device, characterized in that it is equipped with a control means for controlling the mechanism.