A DEVICE TO BE USED IN AUTOMOBILES TO INDICATE SPEED ALONG WITH APPROXIMATE VALUE OF FUEL EFFICIENCY AND SUGGESTED GEAR NUMBER TO BE USED AND SAFE LIMITS OF SPEED

摘要

A device to be used in automobiles for indicating the measured value of speed along with pre-calibrated value of fuel efficiency and suggested gear number simultaneously using moving coil deflection meters or their equivalent display arrangements used for indicating speed, speed markings/calibrations (103) used for measuring speed of vehicle, pre-calibrated fuel efficiency markings (104) for giving fuel efficiency, optimal gear markings (105) for suggested gear for the corresponding speed indicated by deflection of a single pointer (101). At present the driver is unable to determine the speed and gear to drive in, which will give her/him maximum fuel efficiency, as this data is not available to her/him in a simple format in automobiles. Fuel efficiency and gear scales are calibrated using the performance and efficiency parameters obtained at testing stage by testing agency or research lab. It suggests the driver to drive the vehicle at optimum speed to maximize fuel efficiency and minimize wear and tear of the vehicle along with warning beyond safe limits of speed in the given country/state.