JPS63122234U

JPS63122234U -

Info

Publication number: JPS63122234U
Application number: JP1326587U
Authority: JP
Priority date: 1987-01-30
Filing date: 1987-01-30
Publication date: 1988-08-09

Description

[Brief explanation of the drawing]

図面は本考案の一実施例を示すもので、第１図
は吸入空気量検出装置の正断面図、第２図はスロ
ツトルボデイの平面図、第３図は絞り部材の正面
図、第４図は第１図の―線断面図、第５図は
電気回路図、第６図は吸入空気の流れを示す流線
図、第７図及び第８図は従来例を示すもので、第
７図は吸入空気量と比ベンチユリ効率との関係を
示す特性線図、第８図は吸入空気の流れを示す流
線図である。１……スロツトルボデイ、６……吸気通路、７
……バイパス通路、１４……入口、１６……絞り
部材、１９……出口、Ｒｔ，Ｒｓ……熱線。 The drawings show an embodiment of the present invention, in which Fig. 1 is a front sectional view of the intake air amount detection device, Fig. 2 is a plan view of the throttle body, Fig. 3 is a front view of the throttle member, and Fig. 4 is a front view of the throttle body. Fig. 1 is a cross-sectional view taken along the - line, Fig. 5 is an electric circuit diagram, Fig. 6 is a streamline diagram showing the flow of intake air, Figs. 7 and 8 are conventional examples, and Fig. 7 is a FIG. 8 is a characteristic line diagram showing the relationship between intake air amount and specific ventilating efficiency, and FIG. 8 is a streamline diagram showing the flow of intake air. 1...Throttle body, 6...Intake passage, 7
... Bypass passage, 14 ... Inlet, 16 ... Throttle member, 19 ... Outlet, Rt, Rs ... Heat wire.

Claims

[Scope of utility model registration request]

The intake air amount detection device includes a bypass passage formed in the intake passage of a throttle body, a hot wire of a hot wire flowmeter arranged in the bypass passage, and the amount of air flowing through the bypass passage being detected by the hot wire flowmeter. , a constriction portion having an apex that protrudes toward the vicinity of the center of the intake passage on a part of the inner wall of the intake passage downstream of the inlet of the bypass passage, and an outlet of the bypass passage is opened at the apex; An intake air amount detection device characterized in that it is provided in a raised shape.