JPS6281046U

JPS6281046U -

Info

Publication number: JPS6281046U
Application number: JP17259085U
Authority: JP
Priority date: 1985-11-08
Filing date: 1985-11-08
Publication date: 1987-05-23
Also published as: JPH0247487Y2

Description

[Brief explanation of the drawing]

第１図は本考案による一実施例センサの側断面
図、第２図は本考案目的を達成するために必要な
、棒状透光体の長さと半径及び取付け方法を決定
するための計算式を導き出すための光の進路解析
図、第３図は本考案センサを組込んだ自動車エン
ジン用の電子制御燃料噴射装置のシステム図、第
４図はセンサ受光素子の出力電圧対ガソリン〜ア
ルコール混合比の相関グラフの形状が棒状透光体
の寸法によつて左右される有様を示した図である
。図中、Ａ……混合比センサ、１……棒状透光体
、２……発光素子、３……受光素子、４，５……
把持用部材、６……筒状ケーシング、Ｃ……混合
液、Ｌ……棒状透光体の長さ、ｄ……一方の端面
側の把持用部材の長さ。 Figure 1 is a side cross-sectional view of an embodiment of the sensor according to the present invention, and Figure 2 is a calculation formula for determining the length and radius of the rod-shaped transparent body and the mounting method necessary to achieve the purpose of the present invention. Figure 3 is a system diagram of an electronically controlled fuel injection device for an automobile engine that incorporates the sensor of the present invention, and Figure 4 shows the output voltage of the sensor light-receiving element versus the gasoline-alcohol mixture ratio. FIG. 7 is a diagram showing how the shape of a correlation graph is influenced by the dimensions of a rod-shaped transparent body. In the figure, A...Mixing ratio sensor, 1... Rod-shaped transparent body, 2... Light emitting element, 3... Light receiving element, 4, 5...
Gripping member, 6... Tubular casing, C... Mixed liquid, L... Length of rod-shaped transparent body, d... Length of the grasping member on one end surface side.

Claims

[Claims for Utility Model Registration] (1) A rod-shaped transparent body whose both ends are supported by gripping members and whose outer peripheral surface is in contact with a gasoline-alcohol mixture, a light-emitting element on one end face and a light-emitting element on the other end face. In the gasoline-alcohol mixture ratio sensor in which a light-receiving element is attached to the end face with the center lines of each of these three light flux passing directions aligned, the length and radius of the rod-shaped light-transmitting body and the method of attaching the gripping member are as follows: The light is incident on one end face of the rod-shaped transparent body, and the mixture ratio of gasoline to alcohol is 10.
It is characterized in that it is set so that all of the light irradiated with a critical angle at the contact interface with the mixed liquid of 0:0 to 0:100 reaches the other end face after being totally reflected only once. Gasoline to alcohol mixture ratio sensor. (2) The length of the rod-shaped transparent body is L, the radius is r, the length in the light traveling direction of the gripping member attached to the one end face is d, and the length L is attached to the other end face. The value obtained by subtracting the length of the gripping member in the light traveling direction is D, the distance from the light emitting surface of the light emitting element to the one end surface is n, and the critical angle of the rod-shaped light guide at the interface in contact with 100% alcohol is is θa, and the incident angle of the light that produces this critical angle is φ
a. When the angle of incidence of the rod-shaped light guide at the interface in contact with 100% gasoline is θg, and the angle of incidence of light that produces this critical angle is φg, the values of L, D, and n are determined by the following inequality L. <(3r-dtanφa)tanθa D>(r-dtanφg)tanθg d<(r-dtanφa)tanθa The gasoline according to claim 1 of the utility model registration claim, wherein the gasoline is set to satisfy the following relationship. ~Alcohol mixture ratio sensor.