JPS5599075A - Engine rotational variation gauge - Google Patents
Engine rotational variation gaugeInfo
- Publication number
- JPS5599075A JPS5599075A JP760779A JP760779A JPS5599075A JP S5599075 A JPS5599075 A JP S5599075A JP 760779 A JP760779 A JP 760779A JP 760779 A JP760779 A JP 760779A JP S5599075 A JPS5599075 A JP S5599075A
- Authority
- JP
- Japan
- Prior art keywords
- output
- signal
- engine
- circuit
- pulse
- 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.)
- Granted
Links
Abstract
PURPOSE: To accomplish clear discrimination of engine conditions, good or bad, at a glance while reducing the engine regulation time by precisely measuring the rotational speed variations in the engine each time each cylinder is ignited.
CONSTITUTION: The signal whose frequency is proportional to the rotational speed of the engine is shaped in the waveform with a Schmitt circuit 12 and the frequency of the signal is converted to voltage with an F-V converter 14 to produce the output A. The DC component of the output is removed and the high frequency spike and low frequency undulation thereof are removed to produce the output signal B. On the other hand, the point signals generated by each ignition of the cylinders is divided in the voltage and shaped in the waveform by circuit 20 to form a pulse signal C. A monostable multivibrators 22 and 24 generate the output pulses D and E according to the rising and the tailing of the output pulse of the circuit 20. A sample hold circuit 26 sample holds the output signals according to the pulse D and then, the output is inverted to yield the output signal F. Likewise, the sample hold circuit 28 produces the output signal G. The difference between the signals F and G serves as a signal for indicating the variation in the engine rotation.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP760779A JPS5599075A (en) | 1979-01-25 | 1979-01-25 | Engine rotational variation gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP760779A JPS5599075A (en) | 1979-01-25 | 1979-01-25 | Engine rotational variation gauge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5599075A true JPS5599075A (en) | 1980-07-28 |
| JPS631530B2 JPS631530B2 (en) | 1988-01-13 |
Family
ID=11670484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP760779A Granted JPS5599075A (en) | 1979-01-25 | 1979-01-25 | Engine rotational variation gauge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5599075A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5759138A (en) * | 1980-09-27 | 1982-04-09 | Toyota Motor Corp | Method and device for inspecting engine rough idling |
| JPS60201232A (en) * | 1984-02-13 | 1985-10-11 | ゼネラル モ−タ−ズ コ−ポレ−シヨン | Method of diagnosing peak clamp pressure in cylinder for internal combustion engine with output crankshaft |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS633824U (en) * | 1986-06-25 | 1988-01-12 |
-
1979
- 1979-01-25 JP JP760779A patent/JPS5599075A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5759138A (en) * | 1980-09-27 | 1982-04-09 | Toyota Motor Corp | Method and device for inspecting engine rough idling |
| JPS60201232A (en) * | 1984-02-13 | 1985-10-11 | ゼネラル モ−タ−ズ コ−ポレ−シヨン | Method of diagnosing peak clamp pressure in cylinder for internal combustion engine with output crankshaft |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS631530B2 (en) | 1988-01-13 |
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