Cruise control economizer
First Claim
1. A cruise control economizer for controlling an electronically controlled throttle for selectively modulating fuel flow from an injector pump of an engine by selectively adjusting fuel pressure in accordance with a throttle setting signal, comprising:
- the throttle setting signal being a cruise control throttle signal delivered to an electronic throttle interface;
a cruise control receiving a brakes or clutch pressed signal and a set cruise signal;
the cruise control operating in closed loop control to maintain a set cruise speed while the brakes or clutch pressed signal is not on;
an electronic setback throttle control for modifying the cruise control throttle setting signal; and
POM switches for indicating on and off states when prolongation of momentum is desired and for indicating a big fuel cutback setting and a small fuel cutback setting;
the POM switches being connected to a microcontroller that operates using a control method such that upon the conditions that at least one of the POM switches is on and the vehicle speed is below a preprogrammed maximum limit and above a preprogrammed lower POM limit and the brakes or clutch pressed signal is not on;
the microcontroller sends the electronic setback throttle a cruise override signal and a throttle setting that in accord with POM switch indicator and replaces the cruise control throttle control signal going to the throttle with an override throttle control signal that is approximately 80 percent of the set cruise throttle for the small fuel cutback setting and 50 percent of the set cruise throttle for the big fuel cutback setting whereby the electronic fuel control modulates the fuel flow accordingly.
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Accused Products
Abstract
A new cruise control economizer for utilizing momentum gained on downhill travel which operates by selectively overriding a throttle on a vehicle with electronic throttle controls during and after the vehicle is traveling down an incline gaining momentum with minimum fuel consumption. The inventive device includes at least one POM (prolongation of momentum) switch, a microcontroller, a vehicle speed input, a brakes or clutch pressed input, and a vehicle setback throttle means to override cruise control output and send modified throttle setting signals that override electronic cruise controls.
42 Citations
7 Claims
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1. A cruise control economizer for controlling an electronically controlled throttle for selectively modulating fuel flow from an injector pump of an engine by selectively adjusting fuel pressure in accordance with a throttle setting signal, comprising:
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the throttle setting signal being a cruise control throttle signal delivered to an electronic throttle interface; a cruise control receiving a brakes or clutch pressed signal and a set cruise signal; the cruise control operating in closed loop control to maintain a set cruise speed while the brakes or clutch pressed signal is not on; an electronic setback throttle control for modifying the cruise control throttle setting signal; and POM switches for indicating on and off states when prolongation of momentum is desired and for indicating a big fuel cutback setting and a small fuel cutback setting; the POM switches being connected to a microcontroller that operates using a control method such that upon the conditions that at least one of the POM switches is on and the vehicle speed is below a preprogrammed maximum limit and above a preprogrammed lower POM limit and the brakes or clutch pressed signal is not on; the microcontroller sends the electronic setback throttle a cruise override signal and a throttle setting that in accord with POM switch indicator and replaces the cruise control throttle control signal going to the throttle with an override throttle control signal that is approximately 80 percent of the set cruise throttle for the small fuel cutback setting and 50 percent of the set cruise throttle for the big fuel cutback setting whereby the electronic fuel control modulates the fuel flow accordingly. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification