JPS5652412A - Engine rotational frequency control unit - Google Patents
Engine rotational frequency control unitInfo
- Publication number
- JPS5652412A JPS5652412A JP12830079A JP12830079A JPS5652412A JP S5652412 A JPS5652412 A JP S5652412A JP 12830079 A JP12830079 A JP 12830079A JP 12830079 A JP12830079 A JP 12830079A JP S5652412 A JPS5652412 A JP S5652412A
- Authority
- JP
- Japan
- Prior art keywords
- comparator
- rotational frequency
- conversion circuit
- output voltage
- voltage
- 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
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Control Of Velocity Or Acceleration (AREA)
Abstract
PURPOSE: To make it possible to reduce the amplitude of rotational frequency of an engine, by sampling and holding the output voltage of the F/V conversion circuit, comparing this voltage with the reference voltage which is equivalent to the target rotational frequency by the comparator, and removing the ripple component in the output voltage.
CONSTITUTION: The sample holding circuit 20 is provided between the F/V conversion circuit 10 and the comparator 40, and the output voltage of the F/V conversion circuit 10 is sampled in a short time and subsequently it is held so that the output voltage is input to the comparator 40. In this way, a ripple component of the input voltage to the comparator 40 is removed, the hysteresis width of the comparator 40 can be reduced low easily, and also the amplitude in the vicinity of the target rotational frequency of an engine can be controlled low, as well. Also, the π type smoothing circuit which is slow in response time is not required for the F/V conversion circuit 10, and therefore the response time becomes swift enough.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12830079A JPS5652412A (en) | 1979-10-03 | 1979-10-03 | Engine rotational frequency control unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12830079A JPS5652412A (en) | 1979-10-03 | 1979-10-03 | Engine rotational frequency control unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5652412A true JPS5652412A (en) | 1981-05-11 |
Family
ID=14981377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12830079A Pending JPS5652412A (en) | 1979-10-03 | 1979-10-03 | Engine rotational frequency control unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5652412A (en) |
-
1979
- 1979-10-03 JP JP12830079A patent/JPS5652412A/en active Pending
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