초록 ▼

A vehicle performance analyzer which determines and displays instantaneous miles-per-hour, miles-per-gallon and miles-to-end-of-tank. The instantaneous outputs are calculated by a microprocessor using a vehicle speed sensor coupled to the drive shaft of the vehicle transmission, a fuel flow sensor i

A vehicle performance analyzer which determines and displays instantaneous miles-per-hour, miles-per-gallon and miles-to-end-of-tank. The instantaneous outputs are calculated by a microprocessor using a vehicle speed sensor coupled to the drive shaft of the vehicle transmission, a fuel flow sensor introduced in the fuel line between the fuel pump and the carburation system and an analog-to-digital electrical signal converter connected to the electrical fuel gauge. The microprocessor is directed by a resident program contained in read-only memory, which also contains a calibration procedure allowing the person installing the device to accurately calibrate the device to the particular vehicle on which it is installed. This eliminates the need for a variety of special sensors designed to meet the variable needs of different makes and models of vehicles. It also eliminates inaccuracies due to variances in some parameters of different vehicles of identical makes and models.

대표청구항 ▼

A user calibratable vehicle performance system comprising: a plurality of on-board sensing means including speed measuring means for generating a digital representation of the instantaneous vehicle speed; flow measuring means for generating a digital representation of the instantaneous fuel consumpt

A user calibratable vehicle performance system comprising: a plurality of on-board sensing means including speed measuring means for generating a digital representation of the instantaneous vehicle speed; flow measuring means for generating a digital representation of the instantaneous fuel consumption of the vehicle; fuel gauge means for generating a digital representation of the amount of fuel remaining in the vehicle fuel supply; digital computer means responsive to the output of said speed measuring means, said flow measuring means and said fuel gauge means for computing instantaneous miles per gallon of fuel consumption and miles to the end of the vehicle fuel supply; and manually operated calibration means coupled to said computer means for inputting actual data observed by the user at a series of sets of conditions; said manually operated calibration means including manually controlled means for introducing into said digital computer observed data in numerical form; said digital computer responding to said sensing means and the numerical input for generating and displaying a binary signal representative of the calibration constant to be stored in the memory of said digital computer; said manually operated calibration means including a plurality of user operated binary switches for matching the display to input calibration data to the memory of said computer. said computer means thereafter operative to calculate vehicle performance as a function of said calibration values.