JPS57178115A - Knocking detector - Google Patents
Knocking detectorInfo
- Publication number
- JPS57178115A JPS57178115A JP6367281A JP6367281A JPS57178115A JP S57178115 A JPS57178115 A JP S57178115A JP 6367281 A JP6367281 A JP 6367281A JP 6367281 A JP6367281 A JP 6367281A JP S57178115 A JPS57178115 A JP S57178115A
- Authority
- JP
- Japan
- Prior art keywords
- knocking
- criterion
- decided
- during
- detection
- 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.)
- Granted
Links
Classifications
-
- 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
- G01L23/225—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 circuit arrangements therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Testing Of Engines (AREA)
Abstract
PURPOSE:To eliminate continuous errornous detection and to improve the accuracy of controlling by eliminating the omission in the detection of knocking at a relatively low criterion and raising the criterion during a predetermined time when the knocking is once decided. CONSTITUTION:A time limiting circuit 17 and an adder 16 are added between a noise detecting part 5 and a decision part 6. For the beginning, the device is operated at a relatively low criterion, and when knocking is decided in the part 6, the output thereof is inputted to the circuit 17 constituted of charging and discharging circuits, and the signal of a preddtermined value is outputted and are inputted to the adder 16 during the short time which is the generation interval of a trace knock or light knock. In the circuit 16, the above-mentioned signal is added to the BGL signal of a noise detecting part 5 and is outputted to the part 6. Therefore, the level of the criterion increases only during the predetermined time, the erroneous detection by which the knocking is decided continuously is eliminated, and over-controlling is prevented, whereby accuracy is improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6367281A JPS57178115A (en) | 1981-04-27 | 1981-04-27 | Knocking detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6367281A JPS57178115A (en) | 1981-04-27 | 1981-04-27 | Knocking detector |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29616286A Division JPS63139220A (en) | 1986-12-12 | 1986-12-12 | Knocking detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57178115A true JPS57178115A (en) | 1982-11-02 |
| JPS6235608B2 JPS6235608B2 (en) | 1987-08-03 |
Family
ID=13236074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6367281A Granted JPS57178115A (en) | 1981-04-27 | 1981-04-27 | Knocking detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57178115A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04125334U (en) * | 1991-04-30 | 1992-11-16 | 明 末広 | Ceiling material support device |
-
1981
- 1981-04-27 JP JP6367281A patent/JPS57178115A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04125334U (en) * | 1991-04-30 | 1992-11-16 | 明 末広 | Ceiling material support device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6235608B2 (en) | 1987-08-03 |
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