JPH02150518U

JPH02150518U -

Info

Publication number: JPH02150518U
Application number: JP5926789U
Authority: JP
Priority date: 1989-05-23
Filing date: 1989-05-23
Publication date: 1990-12-26

Description

[Brief explanation of drawings]

第１図および第２図は本考案の実施例を示し、
第１図は熱線式流量計の電気回路図、第２図は抵
抗体の温度特性線図、第３図は従来技術を示す熱
線式流量計の電気回路図である。１……感熱素子（熱線抵抗）、２……温度補償
抵抗、３……流量調整抵抗、５，６，７，８……
接続点、９，１０……出力端子、１１……基準抵
抗、１２，１３……抵抗体。 1 and 2 show an embodiment of the present invention,
FIG. 1 is an electric circuit diagram of a hot wire flowmeter, FIG. 2 is a temperature characteristic diagram of a resistor, and FIG. 3 is an electric circuit diagram of a hot wire flowmeter showing a conventional technique. 1... Heat sensitive element (hot wire resistance), 2... Temperature compensation resistance, 3... Flow rate adjustment resistance, 5, 6, 7, 8...
Connection point, 9, 10... Output terminal, 11... Reference resistor, 12, 13... Resistor.

Claims

[Scope of utility model registration request]

A hot wire resistance cooled by intake air flowing through the intake passage and a temperature compensating resistance are arranged in the intake passage of the engine, and a reference resistance and a flow rate adjustment resistance are arranged outside the intake passage. A hot wire flow rate system is constructed by connecting a series circuit consisting of the hot wire resistance and reference resistance and a series circuit consisting of the temperature compensation resistance and flow rate adjustment resistance in parallel between the power source and the ground to form a bridge circuit. In the meter, the reference resistance is connected in series with a first resistor having a positive temperature characteristic, and has a negative temperature characteristic in order to offset the temperature characteristic of the first resistor. A hot wire flowmeter comprising: a second resistor having a second resistor;