JPS57108728A - Knocking detector for internal combustion engine - Google Patents

Knocking detector for internal combustion engine

Info

Publication number
JPS57108728A
JPS57108728A JP18627380A JP18627380A JPS57108728A JP S57108728 A JPS57108728 A JP S57108728A JP 18627380 A JP18627380 A JP 18627380A JP 18627380 A JP18627380 A JP 18627380A JP S57108728 A JPS57108728 A JP S57108728A
Authority
JP
Japan
Prior art keywords
magnetic
diaphragm
pressure
knocking
cooling water
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
JP18627380A
Other languages
Japanese (ja)
Inventor
Tadashi Hattori
Masanori Hanaoka
Yukihide Hashiguchi
Yoshinori Otsuka
Kimiaki Yamaguchi
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.)
Toyota Motor Corp
Soken Inc
Original Assignee
Nippon Soken Inc
Toyota Motor Corp
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 Nippon Soken Inc, Toyota Motor Corp filed Critical Nippon Soken Inc
Priority to JP18627380A priority Critical patent/JPS57108728A/en
Priority to US06/335,284 priority patent/US4424705A/en
Publication of JPS57108728A publication Critical patent/JPS57108728A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
    • G01H11/02—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by magnetic means, e.g. reluctance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating, or supervising devices
    • F02B77/085—Safety, indicating, or supervising devices with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
    • G01L23/221—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines
    • G01L23/223—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines using magnetic or magnetostrictive means

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Ignition Timing (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

PURPOSE:To realize knocking detection with high accuracy, by detecting in an AC way the responsive working of a magnetic diaphragm to the cooling water pressure and then detecting only the pulsating pressure corresponding to the knocking. CONSTITUTION:A magnetic diaphragm 202 is vibrated and displaced with application of the composite pressure of the pressure of the static cooling water and the pulsating pressure of the cooling water according to knocking. Thus a gap G between the diaphragm 202 and a center magnetic path 206 varies. As a result, an AC type change is caused to the magnetic flux produced at a magnetic path comprising a magnet 203, a magnetic matter 205, the diaphragm 202, the magnetic path 206, a magnetic matter plate 204, etc. Thus only the AC displacement corresponding to the pulsating pressure of the diaphragm 202 is detected via a coil 207. Then only the AC component corresponding to the pulsating pressure is detected. In such constitution, the knocking is detected with high accuracy.
JP18627380A 1980-12-26 1980-12-26 Knocking detector for internal combustion engine Pending JPS57108728A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP18627380A JPS57108728A (en) 1980-12-26 1980-12-26 Knocking detector for internal combustion engine
US06/335,284 US4424705A (en) 1980-12-26 1981-12-28 Engine knock sensing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18627380A JPS57108728A (en) 1980-12-26 1980-12-26 Knocking detector for internal combustion engine

Publications (1)

Publication Number Publication Date
JPS57108728A true JPS57108728A (en) 1982-07-06

Family

ID=16185404

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18627380A Pending JPS57108728A (en) 1980-12-26 1980-12-26 Knocking detector for internal combustion engine

Country Status (1)

Country Link
JP (1) JPS57108728A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016527489A (en) * 2013-06-27 2016-09-08 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング Device for detecting combustion chamber pressure in an internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016527489A (en) * 2013-06-27 2016-09-08 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング Device for detecting combustion chamber pressure in an internal combustion engine

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