JPS57173563A - Ignition device of internal combustion engine - Google Patents
Ignition device of internal combustion engineInfo
- Publication number
- JPS57173563A JPS57173563A JP5958981A JP5958981A JPS57173563A JP S57173563 A JPS57173563 A JP S57173563A JP 5958981 A JP5958981 A JP 5958981A JP 5958981 A JP5958981 A JP 5958981A JP S57173563 A JPS57173563 A JP S57173563A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- ignition
- capacitor
- light emitting
- point
- 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
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P9/00—Electric spark ignition control, not otherwise provided for
- F02P9/002—Control of spark intensity, intensifying, lengthening, suppression
- F02P9/005—Control of spark intensity, intensifying, lengthening, suppression by weakening or suppression of sparks to limit the engine speed
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Ignition Timing (AREA)
Abstract
PURPOSE:To prevent overrevolution of an engine effectively with a small number of part items, in an ignition device of the internal combustion engine for power of a portable tool, by utilizing a photocoupler when the device is controlled with voltage of timing to be controlled and reverse voltage. CONSTITUTION:A capacitor 14 is charged through a diode and resistor 11 to increase potential at a point C in a period when voltage across x-y of a primary winding 2 in an ignition coil 1 built in a magneto becomes positive at a point y. If voltage at a point x becomes positive, an electric charge of the capacitor 14 flows in a light emitting diode 12, and this light turns on a phototransistor 16, and voltage division ratio is changed by a divider resistor 7 to decrease applied voltage to a thyristor 5. As an electric discharge goes on, light is not emitted from the light emitting diode 12, and the thyristor 5 is turned on to perform ignition. Now if speed of an engine increases, higher reverse voltage is generated from the ignition coil 1, and potential of the capacitor 14 is also increased to extend a light emitting period, then a delay of ignition timing is increased to prevent overrevolution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5958981A JPS57173563A (en) | 1981-04-20 | 1981-04-20 | Ignition device of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5958981A JPS57173563A (en) | 1981-04-20 | 1981-04-20 | Ignition device of internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57173563A true JPS57173563A (en) | 1982-10-25 |
Family
ID=13117563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5958981A Pending JPS57173563A (en) | 1981-04-20 | 1981-04-20 | Ignition device of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57173563A (en) |
-
1981
- 1981-04-20 JP JP5958981A patent/JPS57173563A/en active Pending
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