FUEL MEASURING DEVICE FOR VEHICLE Russian patent published in 1995 - IPC

FIELD: automotive industry. SUBSTANCE: system has multi-channel (according to the number of fuel tanks) meter of fuel mass density, additional channels for measuring fuel storage in the tanks by mass units, system for measuring position of the center of mass of a movable object with respect to the lateral symmetry axis, indicator of fuel storage in tanks or total fuel storage by mass units, measuring switches, and logical elements. Each channel for measuring mass fuel density in the tanks has bridge circuit that is balanced with respective servo system. The first arm of the servo system has the pickup for measuring volume of the fuel column in respective tank. The second arm of the bridge has parallel capacity pickups for measuring mass of fuel column in the tank. The third arm of the bridge is provided with a capacitor of feedback with linear (by angle of rotation of the rotor) static characteristic, the rotors of which are rigidly secured to the outlet shaft of the reduction gear of servo system for balancing the bridge. The fourth arm of the bridge has a capacitor of constant capacity. The supplying diagonal of the bridge is provided with adjusting alterative resistor and the first temperature-sensitive resistor connected in series and connected with the heat compensating circuit which consists of the first and second adjusting resistors connected in parallel and the first resistor and second temperature-sensitive resistors connected in series. The rotors of respective output elements, e.g. variable resistors, are rigidly secured to the output shaft of the reduction gear of the servo system. The first of the resistors are energized from the individual channel of DC voltage stabilizer, the second one from the common DC voltage stabilizer, the first of which energize respective output elements, e.g. variable resistor which are the output elements of the bridge meter of fuel volume in tanks having the same number of channels as the number of fuel tanks. The outputs of the output elements of the meter are connected with indicator through a logical circuit. For instance, the indicator can be made up as a converter of analog voltage into respective code and digital indicator. The meters for measuring position of center of mass of the movable object with respect to the longitudinal and lateral symmetry axes have two operational meters which calculate the relationship presented in the invention description. EFFECT: improved accuracy. 7 dwg