Multi-functional display for tachometer
First Claim
1. A two dimensional graphical display for indicating optimal shifting RPM of a motor vehicle engine from a current gear to a desired gear comprising:
- a tachometer having a face plate and a pointer that rotates in a clockwise direction as the engine RPM increases;
concentric arcs on the face of the face plate that represent different gears; and
multiple Archimedean spirals overlaying the concentric arcs on the face plate;
wherein when the current RPM of the engine pointer overlays the intersection of the concentric arc of a first gear with an Archimedean spiral then the intersection of that Archimedean spiral with the concentric arc of the next higher gear is the optimal shifting RPM of the next higher gear; and
wherein each Archimedean spiral indicates a constant vehicle speed.
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Abstract
A novel display apparatus and method that enables the operator to shift gears smoothly on motor vehicles is described. The display shows engine revolutions per minute (RPM) at various traveling speeds for any gears all in one dial. The display may also show shifting paths for different driving styles. The static version of the display may be overlaid on top of existing tachometer. The dynamic version of display runs on portable devices with Global Positioning System (GPS) will show optimal RPM and shift indicator continuously. Further, the dynamic display is wireless networked to provide real-time driving instructions.
19 Citations
12 Claims
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1. A two dimensional graphical display for indicating optimal shifting RPM of a motor vehicle engine from a current gear to a desired gear comprising:
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a tachometer having a face plate and a pointer that rotates in a clockwise direction as the engine RPM increases; concentric arcs on the face of the face plate that represent different gears; and multiple Archimedean spirals overlaying the concentric arcs on the face plate; wherein when the current RPM of the engine pointer overlays the intersection of the concentric arc of a first gear with an Archimedean spiral then the intersection of that Archimedean spiral with the concentric arc of the next higher gear is the optimal shifting RPM of the next higher gear; and wherein each Archimedean spiral indicates a constant vehicle speed. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for indicating optimal shifting RPM of a motor vehicle engine from a current gear to a desired gear with a two dimensional display comprises:
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providing a tachometer having a face plate and a pointer that rotates in a clockwise direction as the engine RPM increases; providing concentric arcs on the face of the face plate that represent different gears; and overlaying multiple Archimedean spirals on the concentric arcs on the face plate; wherein when the current RPM of the engine pointer overlays the intersection of the concentric arc of a first gear with an Archimedean spiral then the intersection of that Archimedean spiral with the concentric arc of the next higher gear is the optimal shifting RPM of the next higher gear; and wherein each Archimedean spiral indicates a constant vehicle speed. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification