JPS56168560A - Tachometer for diesel engine - Google Patents

Tachometer for diesel engine

Info

Publication number
JPS56168560A
JPS56168560A JP7215780A JP7215780A JPS56168560A JP S56168560 A JPS56168560 A JP S56168560A JP 7215780 A JP7215780 A JP 7215780A JP 7215780 A JP7215780 A JP 7215780A JP S56168560 A JPS56168560 A JP S56168560A
Authority
JP
Japan
Prior art keywords
output
vibration
low
revolutions
revolution region
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
JP7215780A
Other languages
Japanese (ja)
Inventor
Yoichi Murata
Akira Niimi
Shigeru Niijiki
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.)
Rion Co Ltd
Toyota Motor Corp
Original Assignee
Rion Co Ltd
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 Rion Co Ltd, Toyota Motor Corp filed Critical Rion Co Ltd
Priority to JP7215780A priority Critical patent/JPS56168560A/en
Publication of JPS56168560A publication Critical patent/JPS56168560A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/4802—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general
    • G01P3/4805—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general by using circuits for the electrical integration of the generated pulses

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)

Abstract

PURPOSE:To accurately measure from low revolutions to high revolutions, by drawing out the engine vibration detecting signal through a high-pass filter in the high- revolution region while drawing out directly in the low-revolution region, in a tachometer for a diesel engine. CONSTITUTION:The vibration of the injection valve caused when the fuel injection is performed in a diesel engine is detected by means of a piezoelectric sensor 1 and drawn out as an output A through an automatic gain controller (AGC)2. When the engine is rotating at high speed, vibration of a relatively high frequency is caused, while at low speed, such a vibration is not caused. Therefore, through a switch 4, the output A is passed through a high-pass filter 3 in the high-revolution region, while through nothing in the low-revolution region to obtain an output B. The output C, which has been rectified and integrated, is compared with a reference voltage output D of an integrator 13 having a large time constant and pulse-shaped in a mono-stable multivibrator 14. This is passed through an F-V converter 23 to obtain a voltage proportional to the number of revolutions.
JP7215780A 1980-05-31 1980-05-31 Tachometer for diesel engine Pending JPS56168560A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7215780A JPS56168560A (en) 1980-05-31 1980-05-31 Tachometer for diesel engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7215780A JPS56168560A (en) 1980-05-31 1980-05-31 Tachometer for diesel engine

Publications (1)

Publication Number Publication Date
JPS56168560A true JPS56168560A (en) 1981-12-24

Family

ID=13481132

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7215780A Pending JPS56168560A (en) 1980-05-31 1980-05-31 Tachometer for diesel engine

Country Status (1)

Country Link
JP (1) JPS56168560A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4225819A1 (en) * 1991-08-06 1993-02-11 Jeco Kk Measurement circuit representing measured frequency values - contains clock pulse generator, edge detector, gate circuit, digital filter and corrects for display equipment scatter
EP0952454A1 (en) * 1998-04-23 1999-10-27 DaimlerChrysler AG Rotational speed detection device for turbochargers
CN107328951A (en) * 2017-08-21 2017-11-07 安徽中家智康科技有限公司 It is a kind of that the method for reducing frequency-changeable compressor tachometric survey error is realized by dividing measurement

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4225819A1 (en) * 1991-08-06 1993-02-11 Jeco Kk Measurement circuit representing measured frequency values - contains clock pulse generator, edge detector, gate circuit, digital filter and corrects for display equipment scatter
DE4225819C2 (en) * 1991-08-06 1994-12-22 Jeco Kk Measuring circuit for use in displaying measured frequency values
EP0952454A1 (en) * 1998-04-23 1999-10-27 DaimlerChrysler AG Rotational speed detection device for turbochargers
US6298728B1 (en) 1998-04-23 2001-10-09 Daimlerchrysler Ag Rotational turbocharger speed detector
CN107328951A (en) * 2017-08-21 2017-11-07 安徽中家智康科技有限公司 It is a kind of that the method for reducing frequency-changeable compressor tachometric survey error is realized by dividing measurement
CN107328951B (en) * 2017-08-21 2020-01-17 安徽中家智康科技有限公司 Method for reducing measurement error of rotating speed of variable frequency compressor through frequency division measurement

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