Communications: electrical – Selective – Having indication or alarm
Patent
1975-06-19
1976-09-28
Caldwell, John W.
Communications: electrical
Selective
Having indication or alarm
340 62, 180103BF, 123198R, G08B 2100
Patent
active
039835332
ABSTRACT:
A circuit for providing an indication to the operator of a motor vehicle that the engine or vehicle is operating under conditions likely to produce poor fuel economy. The fuel economy indicating circuit includes a first circuit for generating a first electrical signal having a magnitude proportional to the angular velocity of a component of the vehicle drive train, and a second circuit for generating a second electrical signal having a magnitude proportional to the angular acceleration of a component of the vehicle drive train. A third circuit combines the first and second electrical signals to generate a third signal having a magnitude that is a function of the magnitudes of the first and second electrical signals. An electrically actuable indicating device is controlled by a fourth circuit that is responsive to the magnitude of the third electrical signal to cause actuation of the indicating device when the third electrical signal reaches a predetermined threshold level.
REFERENCES:
patent: 2253425 (1941-08-01), Garland
patent: 2455573 (1948-12-01), Fant, Jr.
patent: 2894252 (1959-07-01), Lawhorn et al.
patent: 3699935 (1972-10-01), Adler et al.
patent: 3757519 (1973-09-01), Graewert
patent: 3909778 (1975-09-01), Maria et al.
Goszyk Kurt A.
Schaefer Richard A.
Brown Robert W.
Caldwell John W.
Ford Motor Company
Nowicki Joseph E.
Zerschling Keith L.
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