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[Judgement of oil level]
When sufficient oilis in the crankcase, bothof inner and outer electrodes are immersed in the oil through
whichcurrentflowsacrosstheelectrodes.Thesensorjudgesthatoil in the crankcase is sufficient. 4 When oil level goes down and the inner electrode is exposed to the air due to consumption of oil, no current flow between the electrodes as isairconsidered to be electrically
The sensor in this case judges that oilis insufficient.
[Decision of oil shortage]
Oil level at the electrodesmay go down momentarily probably due to the engine being slantedor affected by vibration even if a sufficient oil isin the crankcase.
For that reason, the sensor has an electronic timer circuit to prevent it from interpreting as short of oil when amount of oil is sufficient. The sensor has been designed so that the engine is to be stopped only when
The timer employs an integration circuitand it is to be reset when the inner electrode is soaked in the oil again before the sensor decidesit as
The oillevelwhere the sensordecides as
[Automatic stopof engine]
When the sensor decides as
Once the stopping circuit is activated, it keeps functioning until it confirms that the engine has made a
complete stop, thenthe circuit stops functioning automatically. | e |
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| Power circuit | Igniter |
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| LED indicator |
Innerpole - | Detection | - Deley circuit | Stopping |
circuit |
| circuit | |
oil I |
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Outer pole |
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| Engine |
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| Fig. |
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0Power circuit | and regulates it to supply the | ||
| stabilized power to necessary circuits. |
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