Motor vehicle fuel economy indicating circuit

Details Motor vehicle fuel economy indicating circuit Motor vehicle fuel economy indicating circuit

G - Physics

01

D

73/168, 354/24,

G01D 21/00 (2006.01) G01M 99/00 (2011.01) G01F 9/02 (2006.01) G01P 3/56 (2006.01)

Patent

CA 1058721

ABSTRACT OF THE DISCLOSURE 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. - 1 -

253070

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