Multiple rpm indicating tachometer for motor vehicles

• US 6,625,562 B2
• Filed: 10/12/2001
• Issued: 09/23/2003
• Est. Priority Date: 10/12/2001
• Status: Expired due to Fees

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Coato Workshop, Inc., Nissan Motor Co., Ltd.
• Inventors: Horwitz, Stephanie, Keizer, Floris H.J.F., Hayashi, Toshiaki, Shilling, Henry, Simula, Stephen, Ueda, Taro
• Primary Examiner(s): Bui, Bryan
• Application Number:
  US09/976,184
• Publication Number:
  US 20030074158A1
• Time in Patent Office: 711 Days
• Field of Search: 702/127, 702/141, 702/142, 702/145, 324/160, 324/165, 324/166, 340/438-439, 340/441, 340/461-462
• US Class Current: 702/145
• CPC Class Codes: G01P 1/08 Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
• CPC Class Codes: G07C 5/002 Analysing tachograph charts arrangements for graph-reading in general G06K11/00

Abstract

A tachometer for a motor vehicle includes a controller adapted to provide a current rpm value at a current gear which is engaged and at least one predicted rpm value at a different gear which is not currently engaged. A display is operatively connected to the controller and is adapted to produce an observable indication of the current rpm value and an observable indication of the predicted rpm value. By displaying predicted rpm values for different gears, the motor vehicle operator can easily see the effect of shifting gears so that the gears can be shifted in a manner to obtain optimum performance of the motor vehicle. The display preferably produces an observable indication of the current gear number near the current rpm value and an observable indication of the different gear number near the observable indication of the predicted rpm value.

Claims

1. A tachometer for a motor vehicle comprising, in combination:

a display adapted to produce an observable indication of a current rpm value for a current gear and an observable indication of at least one predicted rpm value for a different gear which is a prediction of what the current rpm will become upon changing the current gear to the different gear;

wherein the display is adapted to simultaneously produce the of observable indication of the current rpm value and the observable indication of the at least one predicted rpm value;

wherein the current rpm value is different than the at least one predicted rpm value when the motor vehicle is moving and the current gear is different than the different gear;

a controller operably connected to the display and adapted to provide signals representing the current rpm value for the current gear and the at least one predicted rpm value for the different gear to the display;

at least one sensor operably connected to the controller and adapted to provide signals representing at least the current rpm and the current gear; and

wherein the controller is adapted to determine the at least one predicted rpm value using predetermined performance information and the signals representing at least the current rpm and the current gear.

2. The tachometer according to claim 1, wherein the controller is adapted to calculate the at least one predicted rpm value with stored equations.

3. The tachometer according to claim 1, wherein the display is adapted to produce an observable indication of the current gear near the observable indication of the current rpm value and an observable indication of the different gear near the observable indication of the at least one predicted rpm value.

4. The tachometer according to claim 1, wherein the display is adapted to produce an observable indication of a power-peak rpm value.

5. The tachometer according to claim 4, wherein the display is adapted to produce an observable indication of a torque-peak rpm value.

6. The tachometer according to claim 4, wherein the display is adapted to change a magnitude of the power-peak rpm value during operation of the motor vehicle.

7. The tachometer according to claim 6, wherein the display is adapted to produce an observable indication of a torque-peak rpm value and to change a magnitude of the torque-peak rpm value during operation of the motor vehicle.

8. The tachometer according to claim 1, wherein the display is adapted to produce an observable indication of a torque-peak rpm value.

9. The tachometer according to claim 8, wherein the display is adapted to change a magnitude of the torque-peak rpm value during operation of the motor vehicle.

10. The tachometer according to claim 1, wherein the observable indication of the current rpm value is an arc-shaped bar graph.

11. The tachometer according to claim 10, wherein the arc-shaped bar graph has a height increasing from a low rpm end of the bar graph to a high rpm end of the bar graph.

12. The tachometer according to claim 10, wherein the observable indication of the at least one predicted rpm value is an arc-shaped bar graph adjacent the arc-shaped bar graph indicating the current rpm value and utilizing common scale divisions with the arc-shaped bar graph indicating the current rpm value.

13. The tachometer according to claim 12, wherein the arc-shaped bar graph indicating the current rpm value has a larger height than the bar graph indicating the at least one predicted rpm value at each scale division.

14. The tachometer according to claim 12, wherein the display is adapted to produce a numerical indication of the current gear at a high rpm end of the bar graph indicating the current rpm value and a numerical indication of the different gear at a high rpm end of the bar graph indicating the at least one predicted rpm value.

15. The tachometer according to claim 14, wherein the numerical indication of the current gear is larger than the numerical indication of the different gear.

16. The tachometer according to claim 12, wherein the arc-shaped bar graph indicating the at least one predicted rpm value is located below the arc-shaped bar graph indicating the current rpm value when the different gear is lower than the current gear and is located above the arc-shaped bar graph indicating the current rpm value when the different gear is higher than current gear.

17. The tachometer according to claim 10, wherein the display is adapted to produce an observable indication of a power-peak rpm value and the power-peak rpm value is located at a substantially vertical portion of the arc-shaped bar graph.

18. The tachometer according to claim 1, wherein the observable indication of the current rpm value is a vertical linear bar graph and the observable indication of the at least one predicted rpm value is a vertical linear bar graph adjacent the vertical bar graph indicating the current rpm value and utilizing common scale divisions with the vertical linear bar graph indicating the current rpm value.

19. The tachometer according to claim 1, wherein the observable indication of the current rpm value is a horizontal linear bar graph and the observable indication of the at least one predicted rpm value is a horizontal linear bar graph adjacent the horizontal bar graph indicating the current rpm value and utilizing common scale divisions with the horizontal linear bar graph indicating the current rpm value.

20. The tachometer according to claim 1, wherein the observable indication of the current rpm value is a circular bar graph.

21. The tachometer according to claim 20, wherein the observable indication of the at least one predicted rpm value is a circular bar graph coaxial with the circular bar graph indicating the current rpm value and utilizing common scale divisions with the circular bar graph indicating the current rpm value.

22. The tachometer according to claim 20, wherein the observable indication of the at least one predicted rpm value is a circular bar graph spaced apart from the circular bar graph indicating the current rpm value and having separate scale divisions from the circular bar graph indicating the current rpm value.

23. A motor vehicle comprising, in combination:

a transmission having a current gear which is currently engaged and at least one different gear which is not currently engaged;

a tachometer including a display adapted to produce an observable indication of a current rpm value for the current gear and an observable indication of a predicted rpm value for the different gear which is a prediction of what the current rpm will become upon changing the current gear to the different gear;

wherein the display is adapted to simultaneously produce the of observable indication of the current rpm value and the observable indication of the predicted rpm value;

wherein the current rpm value is different than the predicted rpm value when the motor vehicle is moving and the current gear is different than the different gear;

a controller operably connected to the display and adapted to provide signals representing the current rpm value for the current gear and the predicted rpm value for the different gear to the display;

at least one sensor operably connected to the controller and adapted to provide signals representing at least the current rpm and the current gear; and

wherein the controller is adapted to determine the predicted rpm value using predetermined performance information and the signals representing at least the current rpm and the current gear.

24. The motor vehicle according to claim 23, wherein the controller is adapted to calculate the predicted rpm value with stored equations.

25. A method of providing rpm information comprising the steps of, in combination:

producing an observable indication of a current rpm value for a current gear with a display;

producing an observable indication of at least one predicted rpm value for a different gear which is a prediction of what the current rpm will become upon changing the current gear to the different gear with the display gear;

wherein the of observable indication of the current rpm value and the observable indication of the at least one predicted rpm value are simultaneously produced;

wherein the current rpm value is different than the at least one predicted rpm value when the motor vehicle is moving and the current gear is different than the different gear;

providing signals representing the current rpm value for the current gear and the at least one predicted rpm value for the different gear from a controller to the display;

providing signals representing at least the current rpm and the current gear from at least one sensor to the controller; and

determining the at least one predicted rpm value using predetermined performance information and the signals representing at least the current rpm and the current gear.

26. The method according to claim 25, wherein the step of determining the at least one predicted rpm value includes calculating the at least one predicted rpm value with stored equations of the controller.