Capacitive fuel composition sensor with slow oscillator and high

Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters

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324663, 324690, 73 6143, 307351, G01R 2726, G01N 2722

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active

052313581

ABSTRACT:
A fuel composition sensor provides to a voltage divider comprising sensor and reference capacitors a voltage which oscillates between two voltages at a comparatively low frequency, such as 6 KHz, for lower power dissipation, but which switches fast to produce periodic fast voltage changes across the voltage divider to produce voltage spikes at the junction of the capacitors indicative of the capacitance ratio and thus of fuel composition.

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