×

Fuel-consumption monitoring system for motor vehicles with manually-shifted transmissions

  • US 4,494,404 A
  • Filed: 11/12/1982
  • Issued: 01/22/1985
  • Est. Priority Date: 11/19/1981
  • Status: Expired due to Fees
First Claim
Patent Images

1. A fuel consumption monitoring system for motor vehicles with manually shifted transmissions, equipped with a processing and evaluating means for generating an output signal correlated with the instantaneous fuel consumption of the vehicle, and with an indicating means for emitting an indicating signal informing the driver of the fuel utilization to be expected if another gear were selected, the processing, evaluating and indicating means generating the output signal from a processing operation involving data which are specific to the vehicle and are stored in an electronic read only memory in the evaluating means, and data characterizing the fuel consumption and the operating condition of the propulsion unit of the vehicle, the processing and evaluating means receiving interrogating signals which indicate possible transmission ratios for a change of gear, the evaluating means comprisingmeans for generating a response signal as a measure of at least one of the fuel consumption reduction and the fuel consumption increase which would be obtained if, at an engine power which remains constant, the gear ratio signalled by the interrogating signal in question were to be engaged, instead of the gear ratio currently engaged, andindicating means for displaying a response signal proportional to the consumption difference.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×