JPS56159515A - Indicator of water temperature - Google Patents

Indicator of water temperature

Info

Publication number
JPS56159515A
JPS56159515A JP6058780A JP6058780A JPS56159515A JP S56159515 A JPS56159515 A JP S56159515A JP 6058780 A JP6058780 A JP 6058780A JP 6058780 A JP6058780 A JP 6058780A JP S56159515 A JPS56159515 A JP S56159515A
Authority
JP
Japan
Prior art keywords
voltage
comparator
water
temperature
impressed
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP6058780A
Other languages
Japanese (ja)
Inventor
Masaru Kugo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi 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 filed Critical Hitachi Ltd
Priority to JP6058780A priority Critical patent/JPS56159515A/en
Publication of JPS56159515A publication Critical patent/JPS56159515A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/14—Indicating devices; Other safety devices
    • F01P11/16—Indicating devices; Other safety devices concerning coolant temperature

Abstract

PURPOSE:To enable to indicate the water temperature clearly by a method wherein a signal generated by a water-temperature sensor is converted into a voltage level, the temperature of engine-cooling water is detected by comparing the voltage level with a reference voltage, and the temperature detected is indicated by a light-emitting member. CONSTITUTION:An output V from the water-temperature sensor 2 is impressed on the noninversion input side of a voltage comparator 9 and is compared with the reference voltage E1 which is impressed on the inversion input side of the comparator 9. When V>E1, a signal ''1'' is generated from the comparator 9 and is fed to an input register 16 of a controller 13, whereby output registers 14 and 15 are set at ''0'' and ''1'', respectively, and a voltage E2 corresponding to the ratio between the electric resistances of voltage-dividing resistors 11, 12 is impressed on the inversion input terminal of the comparator 9. Then, the voltage E2 and the voltage V are compared with each other, and when V>E2, a signal ''1'' is generated from the comparator 9, whereby a lamp 26 is turned on through a transistor 23 to indicate that the water temperature is not lower than about 40 deg.C. Similarly, a lamp 27 or a lamp 28 is turned on according as the water temperature is 41-109 deg.C or is not lower than 110 deg.C.
JP6058780A 1980-05-09 1980-05-09 Indicator of water temperature Pending JPS56159515A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6058780A JPS56159515A (en) 1980-05-09 1980-05-09 Indicator of water temperature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6058780A JPS56159515A (en) 1980-05-09 1980-05-09 Indicator of water temperature

Publications (1)

Publication Number Publication Date
JPS56159515A true JPS56159515A (en) 1981-12-08

Family

ID=13146514

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6058780A Pending JPS56159515A (en) 1980-05-09 1980-05-09 Indicator of water temperature

Country Status (1)

Country Link
JP (1) JPS56159515A (en)

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