JPS5774626A - Knock sensor - Google Patents

Knock sensor

Info

Publication number
JPS5774626A
JPS5774626A JP15162380A JP15162380A JPS5774626A JP S5774626 A JPS5774626 A JP S5774626A JP 15162380 A JP15162380 A JP 15162380A JP 15162380 A JP15162380 A JP 15162380A JP S5774626 A JPS5774626 A JP S5774626A
Authority
JP
Japan
Prior art keywords
engine
vibrator
retainer
vibrating part
thickness
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
JP15162380A
Other languages
Japanese (ja)
Inventor
Katsuhiko Tanaka
Yasuo Kato
Masami Kise
Masatoshi Suzuki
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.)
Denso Corp
Original Assignee
NipponDenso 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 NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
Priority to JP15162380A priority Critical patent/JPS5774626A/en
Publication of JPS5774626A publication Critical patent/JPS5774626A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0603—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a piezoelectric bender, e.g. bimorph

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To prevent the production of a change in an oscillation frequency at a using time, by a method wherein, in a bimorph type piezo-electric vibrator which vibrates in synchronism with a natural frequency generated at a time when an engine knocks, a thickness of a retainer thereof is thicker than that of a vibrating part. CONSTITUTION:In an ignition device when an engine efficiency is improved by setting forward an ignition time of an engine to the limit to which a knocking is generated, a bimorph type piezo-electric vibrator is employed to a sensor for detecting engine knocking. A thickness T2 of a retainer 5b, supporting a vibrating part 5a of the vibrator, is enoughly thicker than a thickness T1 of the vibrating part 5a to form a double vibrator in a cantilever in which one end is fixed and the other end is free. Thus, even if a slippage deformation is caused between the retainer 5b and a support body surface during the use, a c-part, which forms the vibrating point of the vibrating part 5a, is monolithically structured, and this permits the stabilization of a resonance frequency, which results in enabling to prevent the production of a change in an oscillation frequency.
JP15162380A 1980-10-29 1980-10-29 Knock sensor Pending JPS5774626A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15162380A JPS5774626A (en) 1980-10-29 1980-10-29 Knock sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15162380A JPS5774626A (en) 1980-10-29 1980-10-29 Knock sensor

Publications (1)

Publication Number Publication Date
JPS5774626A true JPS5774626A (en) 1982-05-10

Family

ID=15522586

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15162380A Pending JPS5774626A (en) 1980-10-29 1980-10-29 Knock sensor

Country Status (1)

Country Link
JP (1) JPS5774626A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0596522A1 (en) * 1992-11-06 1994-05-11 AVANCE TECHNOLOGY, Inc. High frequency crystal resonator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0596522A1 (en) * 1992-11-06 1994-05-11 AVANCE TECHNOLOGY, Inc. High frequency crystal resonator

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