Title:
THERMAL FLOWMETER
Document Type and Number:
Japanese Patent JPH0611372
Kind Code:
A
Abstract:
PURPOSE: To detect the intake air flow of an automobile with high accuracy even when the air flow abruptly changes by absorbing noise associated with the variation of the air flow while the air flow strongly varies.
CONSTITUTION: The title flowmeter uses a temperature sensitive resistor RR for detecting air flow rate and is provided with a capacitor C5 between the (-) and (+) input terminals of the amplifier OP1 of a feedback circuit which controls the heat generation of the resistor RR.
Inventors:
SUGIURA NOBORU
Application Number:
JP33834892A
Publication Date:
January 21, 1994
Filing Date:
December 18, 1992
Export Citation:
Assignee:
HITACHI LTD
International Classes:
F02D45/00; G01F1/68; G01F1/698; G01F15/04; G01P5/12; (IPC1-7): G01F1/68; F02D45/00
Domestic Patent References:
| JPS5550121A | 1980-04-11 | |||
| JPS54113788A | 1979-09-05 | |||
| JPS557069U | 1980-01-17 |
Attorney, Agent or Firm:
Ogawa Katsuo
Next Patent: THERMAL AIR FLOWMETER