Fig. 4.33. Built-in oil sensor: 1 – oil level sensor; 2 – float with magnet; 3 – connector; 4 – engine crankcase; 5 – control hole with bimetallic plate
The oil level indicator light on the instrument panel lights up when the oil level is in the lower third of the dipstick. To avoid false signals, a delayed signal transmission is used. In addition, the oil must be sufficiently liquid. A special sensor on the side of the crankcase (Fig. 4.33) monitors the oil level in the engine. The bimetallic plate at the bottom of the oil level sensor only opens at 60°C. Only then can the oil level in the funnel-shaped sensor change. This plate prevents false signals during sharp turns.
When the ignition is turned on, the control lamp lights up dimly (checking the light bulb) and goes out when the engine starts.