WO2000063656A1 - Débitmètre d'air à fil chaud et moteur à combustion interne - Google Patents

Débitmètre d'air à fil chaud et moteur à combustion interne Download PDF

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Publication number
WO2000063656A1
WO2000063656A1 PCT/JP1999/002032 JP9902032W WO0063656A1 WO 2000063656 A1 WO2000063656 A1 WO 2000063656A1 JP 9902032 W JP9902032 W JP 9902032W WO 0063656 A1 WO0063656 A1 WO 0063656A1
Authority
WO
WIPO (PCT)
Prior art keywords
resistor
heating
air flow
resistors
circuit
Prior art date
Application number
PCT/JP1999/002032
Other languages
English (en)
Japanese (ja)
Inventor
Atsushi Kanke
Masamichi Yamada
Keiichi Nakada
Izumi Watanabe
Original Assignee
Hitachi, Ltd.
Hitachi Car Engineering Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi, Ltd., Hitachi Car Engineering Co., Ltd. filed Critical Hitachi, Ltd.
Priority to PCT/JP1999/002032 priority Critical patent/WO2000063656A1/fr
Priority to JP2000612709A priority patent/JP4154125B2/ja
Publication of WO2000063656A1 publication Critical patent/WO2000063656A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • F02D41/187—Circuit arrangements for generating control signals by measuring intake air flow using a hot wire flow sensor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/688—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element
    • G01F1/69—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element of resistive type
    • G01F1/692—Thin-film arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/696—Circuits therefor, e.g. constant-current flow meters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/696—Circuits therefor, e.g. constant-current flow meters
    • G01F1/698—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters

Abstract

L'invention concerne un débitmètre d'air à fil chaud comprenant un organe à montage en pont qui forme un circuit d'attaque à température constante avec une résistance chauffante et une résistance de compensation thermique. Ce débitmètre est également muni d'un organe permettant de détecter le pouvoir calorifique de ladite résistance chauffante, un organe circuit étant par ailleurs destiné à régler la durée de chauffage en fonction de ce pouvoir calorifique. A l'inverse, un débitmètre d'air à fil chaud traditionnel, conçu pour mesurer un volume d'air injecté dans le moteur à combustion interne d'une automobile ou similaire, nécessite l'utilisation d'une résistance chauffante avec une capacité calorifique réduite, par exemple un corps de chauffe à couches minces formé sur un substrat de silicium afin d'améliorer la réceptivité. Toute substance absorbant la chaleur, comme la poussière ou l'eau, peut néanmoins être déposée sur la résistance chauffante afin d'obtenir un pouvoir calorifique continu maximal dépassant la capacité calorifique originelle de cette résistance qui suffit normalement pour détériorer une résistance à fines couches.
PCT/JP1999/002032 1999-04-16 1999-04-16 Débitmètre d'air à fil chaud et moteur à combustion interne WO2000063656A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP1999/002032 WO2000063656A1 (fr) 1999-04-16 1999-04-16 Débitmètre d'air à fil chaud et moteur à combustion interne
JP2000612709A JP4154125B2 (ja) 1999-04-16 1999-04-16 熱式空気流量計

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1999/002032 WO2000063656A1 (fr) 1999-04-16 1999-04-16 Débitmètre d'air à fil chaud et moteur à combustion interne

Publications (1)

Publication Number Publication Date
WO2000063656A1 true WO2000063656A1 (fr) 2000-10-26

Family

ID=14235491

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1999/002032 WO2000063656A1 (fr) 1999-04-16 1999-04-16 Débitmètre d'air à fil chaud et moteur à combustion interne

Country Status (2)

Country Link
JP (1) JP4154125B2 (fr)
WO (1) WO2000063656A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61102522A (ja) * 1984-10-25 1986-05-21 Japan Electronic Control Syst Co Ltd 内燃機関の熱線式空気流量計
JPS62123318A (ja) * 1985-08-13 1987-06-04 Nippon Soken Inc 直熱型流量センサ
JPH0448221A (ja) * 1990-06-15 1992-02-18 Aisan Ind Co Ltd 吸入空気量検出装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61102522A (ja) * 1984-10-25 1986-05-21 Japan Electronic Control Syst Co Ltd 内燃機関の熱線式空気流量計
JPS62123318A (ja) * 1985-08-13 1987-06-04 Nippon Soken Inc 直熱型流量センサ
JPH0448221A (ja) * 1990-06-15 1992-02-18 Aisan Ind Co Ltd 吸入空気量検出装置

Also Published As

Publication number Publication date
JP4154125B2 (ja) 2008-09-24

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