Subaru Robin Power Products RGX3510 manual Judgement of oil level, Decision of oil shortage

[Judgement of oil level]

When sufficient oil is in the crankcase, both of inner and outer electrodes are immersed in the oil through which current flows across the electrodes. The sensor judges that oil in the crankcase is sufficient.

\%'hen oil levelgoesdownandtheinnerelectrodeisexposedtotheairduetoconsumptionof oil,no current flow between the electrodes as air is considered to be electrically non-conductive.

The sensor in this case judges that oil is insufficient.

[Decision of oil shortage]

Oil level at the electrodes may go down momentarily probably dueto the engine being slanted or affected by vibration even if a sufficient oil is in the crankcase.

Forthatreason,thesensorhasanelectronictimercircuit to prevent it from- interpreting as short of oil when amount of oil is sufficient. The sensor has been designed so that the engine i s LO be stopped only when oil-shortage is detected for 5 seconds uninterrupted.

The timer emplovs an integration circuitand it is to be reset when the inner electrode is soaked in the oil again before the sensor decidesit as oil-shortage.

The oil levelwherethesensordecidesasoil-shortage,whenoillevelgoesdowngradually,iscalled "threshold level".

[Automatic stopof engine]

When rhe sensor decides as oil-shortage, it makes the engine to stop running automatically for protection of engine.

Once the stopping circuit is activated, it keeps functioning until it confirms thattheenginehas made a complete stop, then the circuit stops functioning automatically.

5-5-4BLOCK DIAGRAM OF THE CIRCUIT

Power circuit

Innerpole	1	Detection		-	Deley circuit
	-	circuit
oil I
Outer					pole
					Fig. 5-15
: 1: Po\\:er	circuit	-. *
/"			Thisrectifiesa		part of powertotheigniterandregulates
u

stabilized power to necessary circuits.

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Igniter

-

-LEDindicator

Stopping circuit

it to supplythe