JPS62174223U - - Google Patents
Info
- Publication number
- JPS62174223U JPS62174223U JP6211586U JP6211586U JPS62174223U JP S62174223 U JPS62174223 U JP S62174223U JP 6211586 U JP6211586 U JP 6211586U JP 6211586 U JP6211586 U JP 6211586U JP S62174223 U JPS62174223 U JP S62174223U
- Authority
- JP
- Japan
- Prior art keywords
- output signal
- waveform shaping
- shaping circuit
- phase
- intake air
- 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
Links
- 238000007493 shaping process Methods 0.000 claims description 7
- 230000010363 phase shift Effects 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 claims 3
- 238000001514 detection method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Combined Controls Of Internal Combustion Engines (AREA)
- Measuring Volume Flow (AREA)
Description
第１図はこの考案に係る装置の構成図、第２図
は従来装置の構成図、第３図は従来およびこの考
案に係る装置の動作波形図である。
２……渦発生体、４……超音波発信子、５……
超音波受信子、６……発振回路、７……電圧制御
位相偏移回路、８……第１の波形整形回路、９…
…位相比較器、１０……ループフイルタ、１１…
…ローパスフイルタ、１５……吸入空気通路、１
７……第２の波形整形回路、１８……圧力センサ
、１９……増幅器、２０……インバータ。尚、図
中同一符号は同一または相当部分を示す。
FIG. 1 is a block diagram of an apparatus according to this invention, FIG. 2 is a block diagram of a conventional apparatus, and FIG. 3 is an operating waveform diagram of the conventional apparatus and the apparatus according to this invention. 2... Vortex generator, 4... Ultrasonic transmitter, 5...
Ultrasonic receiver, 6...Oscillation circuit, 7...Voltage control phase shift circuit, 8...First waveform shaping circuit, 9...
...Phase comparator, 10...Loop filter, 11...
...Low pass filter, 15...Intake air passage, 1
7...Second waveform shaping circuit, 18...Pressure sensor, 19...Amplifier, 20...Inverter. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
生体、この渦発生体の下流に発生するカルマン渦
列の流れを横切つて超音波を伝幡させるように設
けられた超音波発信子、この超音波発信子を励振
させる発振回路、カルマン渦によつて位相変調さ
れた超音波発信子からの超音波を受信する超音波
受信子、超音波受信子の出力を整形する第１波形
整形回路、第１波形整形回路の出力信号を第１の
入力とする位相比較器、位相比較器の出力の不要
周波数成分を除去するループフイルタ、発振回路
の出力信号からの位相偏移角をループフイルタの
出力電圧に対応して制御する電圧制御位相偏移回
路、電圧制御位相偏移回路の出力を第２の入力と
し第１の入力と第２の入力の位相差を出力する位
相比較器の出力信号から搬送周波数成分を除去す
るローパスフイルタ、超音波受信子近傍の吸入空
気通路内圧力に応動して出力する圧力センサ、圧
力センサの出力信号とローパスフイルタの出力信
号との差動和を整形して出力する第２の波形整形
回路を備えたことを特徴とする内燃機関の吸入空
気量検出装置。 (2) 圧力センサの出力信号をｎ倍する増幅器、
この増幅器の出力信号の位相を反転するインバー
タ、このインバータの出力信号とローパスフイル
タの出力信号を夫々第１および第２のＣＲ直列回
路を介して第２の波形整形回路に入力したことを
特徴とする実用新案登録請求の範囲第１項記載の
内燃機関の吸入空気量検出装置。[Claims for Utility Model Registration] (1) A vortex generator disposed in the intake air passage of an internal combustion engine, which propagates ultrasonic waves across the flow of the Karman vortex street generated downstream of the vortex generator. An ultrasonic transmitter provided as shown in FIG. a first waveform shaping circuit that shapes the output of the first waveform shaping circuit, a phase comparator that takes the output signal of the first waveform shaping circuit as its first input, a loop filter that removes unnecessary frequency components from the output of the phase comparator, and an output signal of the oscillation circuit. A voltage-controlled phase-shift circuit that controls the phase shift angle from A low-pass filter that removes the carrier frequency component from the output signal of the phase comparator that outputs the phase difference, a pressure sensor that outputs in response to the pressure in the intake air passage near the ultrasonic receiver, and the output signal of the pressure sensor and the output of the low-pass filter. An intake air amount detection device for an internal combustion engine, comprising a second waveform shaping circuit that shapes and outputs a differential sum with a signal. (2) an amplifier that multiplies the output signal of the pressure sensor by n;
An inverter inverts the phase of the output signal of the amplifier, and the output signal of the inverter and the output signal of the low-pass filter are input to the second waveform shaping circuit via first and second CR series circuits, respectively. An intake air amount detection device for an internal combustion engine according to claim 1 of the utility model registration claim.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6211586U JPS62174223U (en) | 1986-04-24 | 1986-04-24 | |
| US07/038,607 US4815324A (en) | 1986-04-24 | 1987-04-15 | Intake air meter for an internal combustion engine |
| KR2019870005666U KR900009144Y1 (en) | 1986-04-24 | 1987-04-20 | Air volume detective system of in engine |
| DE19873713523 DE3713523A1 (en) | 1986-04-24 | 1987-04-22 | AIR INLET MEASURING DEVICE FOR A COMBUSTION ENGINE |
| AU71921/87A AU574015B2 (en) | 1986-04-24 | 1987-04-23 | Air intake meter for an internal combustion engine |
| FR878705755A FR2597972B1 (en) | 1986-04-24 | 1987-04-23 | AIR INTAKE MEASURING APPARATUS FOR AN INTERNAL COMBUSTION ENGINE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6211586U JPS62174223U (en) | 1986-04-24 | 1986-04-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62174223U true JPS62174223U (en) | 1987-11-05 |
Family
ID=30896081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6211586U Pending JPS62174223U (en) | 1986-04-24 | 1986-04-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62174223U (en) |
-
1986
- 1986-04-24 JP JP6211586U patent/JPS62174223U/ja active Pending
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