Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1993-09-21
1995-03-28
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Fuel injection system
123 1A, F02M 5100
Patent
active
054007585
ABSTRACT:
An electronic sensor (20) for measuring methanol content in gasoline fuels for automotive engines including a sensing coil (108/108') and a paired capacitance element (42,44/42', 44') that cooperates with the coil to define an oscillating circuit wherein the gasoline methanol fuel mixture is used as a dielectric for the capacitor elements of the sensor, a change in the methanol concentration in the fuel resulting in a change in the dielectric constant of the sensor (20) which results in a change in the resonant frequency of the capacitor elements (108/108', 42/44/42', 44'), and a microprocessor circuit (160) which responds to a change in the oscillating frequency to establish a control signal that may be used by an automotive powertrain controller (24) to effect appropriate adjustments in the air/fuel ratio and ignition timing for the engine (10) to compensate for variations in the methanol content of the fuel.
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Barr Rodney E.
Kopera John J. C.
Rader Richard K.
Vogt Carl R.
Borg-Warner Automotive Inc.
Calcaterra Mark P.
Chrysler Corporation
Nelli Raymond A.
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