JPS56159533A - Device for preventing afterfire of internal-combustion engine - Google Patents
Device for preventing afterfire of internal-combustion engineInfo
- Publication number
- JPS56159533A JPS56159533A JP6251580A JP6251580A JPS56159533A JP S56159533 A JPS56159533 A JP S56159533A JP 6251580 A JP6251580 A JP 6251580A JP 6251580 A JP6251580 A JP 6251580A JP S56159533 A JPS56159533 A JP S56159533A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- switch
- generate
- pressure
- negative
- 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
Abstract
PURPOSE: To prevent the occurrence of the after-fire while retaining comfortableness in driven by a method wherein the operation of an ignition coil is interrupted for a predetermined period of time during a rapid deceleration, and the secondary air is introduced into an exhaust-gas passage at least during said period of time.
CONSTITUTION: Negative-pressure switches 8, 9 are provided in an intake manifold 3 so that a high load on the engine is detected by the switch 8 and the full-closing of a throttle valve 3a is detected by the switch 9. For example, the switch 8 is designed to generate a signal "0" when the intake negative-pressure is not lower than -150mmHg and to generate a signal "1" when the negative pressure is lower than that value. On the other hand, the switch 9 is so designed, for instance, as to generate a signal "0" when the intake negative-pressure is not higher than -500mmHg and to generate a signal "1" when the negative pressure is higher than that value. When a rapid closing of the throttle valve 3a is detected by a rapid-deceleration detector 11 through the switches 8, 9, an ignition control circuit 12 is controlled so that the supply of an ignition signal from an ignition signal generator 13 to the ignition coil 14 is interrupted for the predetermined period of time, for instance, 2sec.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6251580A JPS56159533A (en) | 1980-05-12 | 1980-05-12 | Device for preventing afterfire of internal-combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6251580A JPS56159533A (en) | 1980-05-12 | 1980-05-12 | Device for preventing afterfire of internal-combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56159533A true JPS56159533A (en) | 1981-12-08 |
Family
ID=13202386
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6251580A Pending JPS56159533A (en) | 1980-05-12 | 1980-05-12 | Device for preventing afterfire of internal-combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56159533A (en) |
-
1980
- 1980-05-12 JP JP6251580A patent/JPS56159533A/en active Pending
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