JPS5797117A - Flow rate control method - Google Patents

Flow rate control method

Info

Publication number
JPS5797117A
JPS5797117A JP17309880A JP17309880A JPS5797117A JP S5797117 A JPS5797117 A JP S5797117A JP 17309880 A JP17309880 A JP 17309880A JP 17309880 A JP17309880 A JP 17309880A JP S5797117 A JPS5797117 A JP S5797117A
Authority
JP
Japan
Prior art keywords
flow rate
electromagnetic valves
duty
electromagnetic
switching
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
JP17309880A
Other languages
Japanese (ja)
Inventor
Tadashi Kobayashi
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP17309880A priority Critical patent/JPS5797117A/en
Publication of JPS5797117A publication Critical patent/JPS5797117A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Flow Control (AREA)

Abstract

PURPOSE:To reduce the switching frequency of electromagnetic valves and to increase the durability of a device, by giving the switching control to only one of plural electromagnetic valves with the necessary duty with other electromagnetic valves opened fully and thus improving both the flow rate and control properties. CONSTITUTION:Electromagnetic valves 13a-13c are connected in parallel; a differential pressure control valve 16 holds the differential pressure between the upper and lower flows of the electromagnetic valves at a prescribed level; and a controller 20 controls the switching of the valves 13a-13c. Then a switching signal of 100 duty is delivered to N-1 units of electromagnetic valves that satisfy an equation (N-1)QO<=Q<N.QO, where Q is the required flow rate, QO is the flow rate per electromagnetic valve in the case of the duty 100 and N is a positive integer respectively. At the same time, the switching signal having the duty which is set to obtain the flow rate of Q-(N-1)QO is delivered to an electromagnetic valve excepting the above-mentioned N-1 units of the electromagnetic valve.
JP17309880A 1980-12-10 1980-12-10 Flow rate control method Pending JPS5797117A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17309880A JPS5797117A (en) 1980-12-10 1980-12-10 Flow rate control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17309880A JPS5797117A (en) 1980-12-10 1980-12-10 Flow rate control method

Publications (1)

Publication Number Publication Date
JPS5797117A true JPS5797117A (en) 1982-06-16

Family

ID=15954143

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17309880A Pending JPS5797117A (en) 1980-12-10 1980-12-10 Flow rate control method

Country Status (1)

Country Link
JP (1) JPS5797117A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60171501A (en) * 1984-02-15 1985-09-05 Fujitsu Ten Ltd Flow rate controller
US5353770A (en) * 1992-05-21 1994-10-11 Toyota Jidosha Kabushiki Kaisha Apparatus for controlling flow of evaporated fuel from canister to intake passage of engine using purge control valves
JPH07121240A (en) * 1993-10-26 1995-05-12 Railway Technical Res Inst Method and device for flow rate control

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60171501A (en) * 1984-02-15 1985-09-05 Fujitsu Ten Ltd Flow rate controller
US5353770A (en) * 1992-05-21 1994-10-11 Toyota Jidosha Kabushiki Kaisha Apparatus for controlling flow of evaporated fuel from canister to intake passage of engine using purge control valves
JPH07121240A (en) * 1993-10-26 1995-05-12 Railway Technical Res Inst Method and device for flow rate control

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