CAPACITIVE SENSOR ASSEMBLY

摘要

A sensor assembly (20) includes a tilt sensor (42), an oil level sensor (68), an oil temperature sensor (70) and an oil deterioration sensor (72), as well as associated output signal conditioning electronics (78, 90, 92) integrated within a common assembly. The sensor assembly (20) is configured to receive a volume of motor oil proportional to a total volume of oil in an engine. The oil level sensor (68), oil temperature sensor (70) and oil deterioration sensor (72) include electrodes which are completely or partially immersed in the volume of motor oil depending upon the total volume of oil in the engine. The tilt sensor (42) includes only two electrodes (48, 50) both of which are at least partially immersed within a controlled volume of dielectric fluid (58) which is physically and electrically isolated from the volume of motor oil. One of the electrodes (50) of the tilt sensor (42) is completely immersed in the controlled volume of dielectric fluid (58) independent of an angle of the tilt sensor (42) relative to a vector (44) representing forces such as gravity applied to the tilt sensor (42).