JPS5742823A - Knocking detector of internal combustion engine - Google Patents
Knocking detector of internal combustion engineInfo
- Publication number
- JPS5742823A JPS5742823A JP11942880A JP11942880A JPS5742823A JP S5742823 A JPS5742823 A JP S5742823A JP 11942880 A JP11942880 A JP 11942880A JP 11942880 A JP11942880 A JP 11942880A JP S5742823 A JPS5742823 A JP S5742823A
- Authority
- JP
- Japan
- Prior art keywords
- knocking
- same time
- combustion engine
- internal combustion
- vibration levels
- 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
-
- 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)
- Testing Of Engines (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
PURPOSE:To eliminate erroneous detection by detecting vibration levels in >=2 frequency bands wherein the vibration levels each have a peak when knocking occurs and by deciding on knocking when the detected levels exceed predetermined values at the same time. CONSTITUTION:To the cylinder block of an internal combustion engine or the constituent body 1 of a head, etc., one case or two vibrating elements 2 and 3 each incorporated in a case are fitted. The elements 2 and 3 are both of a piezoelectric or magnetostrictive system and so set that they resonate at frequencies f1 and f2 where vibration levels when knocking occurs each have a peak. The vibrators 2 and 3 are connected to a knocking deciding device 6 through preamplifiers 4 and 5 and the deciding device 5 generates an output showing the occurrence of knocking from an output terminal 7 only when the outputs of the amplifiers 4 and 5 exceed a predetermined value H at the same time. Normally, the outputs are seldom detected exceeding the value H at the same time approximately at the frequencies f1 and f2, so that erroneous detection of knocking is eliminated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11942880A JPS5742823A (en) | 1980-08-28 | 1980-08-28 | Knocking detector of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11942880A JPS5742823A (en) | 1980-08-28 | 1980-08-28 | Knocking detector of internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5742823A true JPS5742823A (en) | 1982-03-10 |
Family
ID=14761190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11942880A Pending JPS5742823A (en) | 1980-08-28 | 1980-08-28 | Knocking detector of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5742823A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0192624A (en) * | 1987-10-05 | 1989-04-11 | Mitsubishi Motors Corp | Knocking detecting device |
| JPH0533716A (en) * | 1991-07-29 | 1993-02-09 | Nissan Motor Co Ltd | Knocking detection device for internal combustion engine |
-
1980
- 1980-08-28 JP JP11942880A patent/JPS5742823A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0192624A (en) * | 1987-10-05 | 1989-04-11 | Mitsubishi Motors Corp | Knocking detecting device |
| JPH0533716A (en) * | 1991-07-29 | 1993-02-09 | Nissan Motor Co Ltd | Knocking detection device for internal combustion engine |
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