JPS5652571A - Ignition timing control device - Google Patents
Ignition timing control deviceInfo
- Publication number
- JPS5652571A JPS5652571A JP12907979A JP12907979A JPS5652571A JP S5652571 A JPS5652571 A JP S5652571A JP 12907979 A JP12907979 A JP 12907979A JP 12907979 A JP12907979 A JP 12907979A JP S5652571 A JPS5652571 A JP S5652571A
- Authority
- JP
- Japan
- Prior art keywords
- negative pressure
- ignition timing
- control device
- pressure
- back pressure
- 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
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/05—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means
- F02P5/10—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means dependent on fluid pressure in engine, e.g. combustion-air pressure
- F02P5/103—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means dependent on fluid pressure in engine, e.g. combustion-air pressure dependent on the combustion-air pressure in engine
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (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 shift spark advance at the time of normal running and at the time of acceleration by providing a negative pressure control device, which works with back pressure, in the negative pressure line leading from the negative pressure takeout port of a carburettor to a vacuum advance device of distributor. CONSTITUTION:As the back pressure in an exhaust manifold 9 becomes low during constant running, the pressure in a back pressure chamber 14 of negative pressure control device 8 sinks and, thereby, a diaphragm 13 loses its deflection and a valve 17 is closed. Thus, communication between a negative pressure chamber 16 and an atmospheric chamber 15 is shut off, and the pressure is applied directly to a vacuum advance device 6, which is set so as to give larger spark advance than that of any conventional arrangement, so that the ignition timing is sufficiently advanced and the driving feeling and fuel consuming rate are improved. The back pressure in the exhaust manifold 9 becomes high during acceleration, on the other hand, and the negative pressure to be applied to the vacuum advance device 6 as well as that in the negative pressure chamber 16 sinks and the amount of spark advance becomes small, so that the ignition timing is delayed. Generation of HC, NOx, etc. in the exhaust gas is thus reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12907979A JPS5652571A (en) | 1979-10-05 | 1979-10-05 | Ignition timing control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12907979A JPS5652571A (en) | 1979-10-05 | 1979-10-05 | Ignition timing control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5652571A true JPS5652571A (en) | 1981-05-11 |
Family
ID=15000551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12907979A Pending JPS5652571A (en) | 1979-10-05 | 1979-10-05 | Ignition timing control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5652571A (en) |
-
1979
- 1979-10-05 JP JP12907979A patent/JPS5652571A/en active Pending
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