JPS6439418U

JPS6439418U -

Info

Publication number: JPS6439418U
Application number: JP1987134567U
Authority: JP
Priority date: 1987-09-04
Filing date: 1987-09-04
Publication date: 1989-03-09
Anticipated expiration: 2002-09-04
Also published as: JPH0541215Y2

Description

[Brief explanation of the drawing]

第１図は本考案の第１実施例に係る排気ガス浄
化装置の正面図、第２図は第１図の―線に沿
う断面図、第３図は第１図―線に沿う断面図
、第４図は第１図の装置における排気ガス流路断
面積の比とフイードバツク周波数との関係を示す
特性図、第５図は第１図の装置における排気ガス
流路断面積の比と背圧との関係を示す特性図、第
６図は第１図の装置における排気ガス流路面積の
比と排気ガス温度との関係を示した特性図、第７
図は本考案の第２実施例に係る排気ガス浄化装置
の正面図、第８図は第７図の装置の側面図、第９
図は第７図の装置における排気マニホルドの長さ
と触媒コンバータに流入する排気ガスの温度との
関係を示した特性図、第１０図は本考案の第３実
施例に係る排気ガス浄化装置の正面図、第１１図
は本考案の第４実施例に係る排気ガス浄化装置の
正面図、第１２図は第１１図の―線に沿
う断面図、第１３図および第１４図は第１２図の
各変形例を示した断面図、である。１０……シリンダヘツド、１１……排気マニホ
ルド、１１ａ……ブランチ、１１ｂ……排気ガス
流入口、１１ｄ……集合部、１１ｅ……絞り部、
１１ｆ……拡径部、１２，２４，３５，３６，４
５……触媒コンバータ、１３……酸素センサ、Ａ
……排気ガス流入口の流路断面積、Ｂ……絞り部
の流路断面積、Ｃ……触媒コンバータの流路断面
積。 FIG. 1 is a front view of an exhaust gas purification device according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along line - in FIG. 1, and FIG. 3 is a sectional view taken along line - in FIG. Fig. 4 is a characteristic diagram showing the relationship between the ratio of the cross-sectional area of the exhaust gas flow path and the feedback frequency in the device shown in Fig. 1, and Fig. 5 is a characteristic diagram showing the relationship between the ratio of the cross-sectional area of the exhaust gas flow path and the feedback frequency in the device shown in Fig. 1. Fig. 6 is a characteristic diagram showing the relationship between the exhaust gas flow area ratio and exhaust gas temperature in the device of Fig. 1;
The figures are a front view of an exhaust gas purification device according to a second embodiment of the present invention, FIG. 8 is a side view of the device of FIG. 7, and FIG.
The figure is a characteristic diagram showing the relationship between the length of the exhaust manifold and the temperature of the exhaust gas flowing into the catalytic converter in the device shown in FIG. 7, and FIG. 10 is a front view of the exhaust gas purification device according to the third embodiment of the present invention. 11 is a front view of an exhaust gas purification device according to a fourth embodiment of the present invention, FIG. 12 is a sectional view taken along the line - in FIG. 11, and FIGS. 13 and 14 are It is a sectional view showing each modification. 10... Cylinder head, 11... Exhaust manifold, 11a... Branch, 11b... Exhaust gas inlet, 11d... Collection part, 11e... Throttle part,
11f... Expanded diameter part, 12, 24, 35, 36, 4
5...Catalytic converter, 13...Oxygen sensor, A
...Cross-sectional area of the exhaust gas inlet, B...Cross-sectional area of the throttle section, C...Cross-sectional area of the catalytic converter.

Claims

[Scope of utility model registration request]

In an exhaust gas purification device, a catalytic converter is disposed immediately downstream of an exhaust manifold, an oxygen sensor is disposed upstream of the catalytic converter, and the exhaust gas purification is controlled based on a feedback signal from the oxygen sensor. , a constriction part is formed in which the cross-sectional area of the flow path becomes smaller as it goes downstream, allowing the exhaust gas flowing into the exhaust manifold to reach the oxygen sensor without reducing the flow velocity, and a catalytic converter is installed downstream of the constriction part. 1. An exhaust gas purification device characterized by forming an enlarged diameter portion in which the cross-sectional area of the passage gradually increases as it approaches the exhaust gas purifier.