JPS57165641A - Signal detector circuit of injection valve lift sensor - Google Patents
Signal detector circuit of injection valve lift sensorInfo
- Publication number
- JPS57165641A JPS57165641A JP56051936A JP5193681A JPS57165641A JP S57165641 A JPS57165641 A JP S57165641A JP 56051936 A JP56051936 A JP 56051936A JP 5193681 A JP5193681 A JP 5193681A JP S57165641 A JPS57165641 A JP S57165641A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- capacitor
- time constant
- valve lift
- speed
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/32—Controlling fuel injection of the low pressure type
- F02D41/34—Controlling fuel injection of the low pressure type with means for controlling injection timing or duration
- F02D41/345—Controlling injection timing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
PURPOSE:To perform correct control at detection of a needle valve lift, by arranging the time constant of resistor and capacitor, in a feedback circuit of the comparison operational amplifier between sensor and reference signals, to a large value at low speed and a small value at high speed. CONSTITUTION:For engine speed not more than a prescribed value, an H signal is output from a processor 33 to turn on a transistor 31 and short circuit a capacitor 30, and the time constant of a feedback circuit 11 is increased by a resistor 12 and capacitor 13 to extend an H level section of the output signal W of an operational amplifier 6, accordingly the output signal S of a pick up coil 2 can be correctly detected even for continuous generation of a noise signal S0. On the contrary, for the speed of become at least the prescribed value, the transistor 31 is turned off, and the capacitor 30 is connected for the capacitor 13 to decrease the time constant. Accordingly, H level width of the signal W is decreased, and the signal W following up the signal S can be obtained, then operation of a needle valve can be correctly detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56051936A JPS57165641A (en) | 1981-04-06 | 1981-04-06 | Signal detector circuit of injection valve lift sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56051936A JPS57165641A (en) | 1981-04-06 | 1981-04-06 | Signal detector circuit of injection valve lift sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57165641A true JPS57165641A (en) | 1982-10-12 |
Family
ID=12900746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56051936A Pending JPS57165641A (en) | 1981-04-06 | 1981-04-06 | Signal detector circuit of injection valve lift sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57165641A (en) |
-
1981
- 1981-04-06 JP JP56051936A patent/JPS57165641A/en active Pending
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