| 摘要 |
<p>This invention provides a method of measuring the distance per amount of fuel that is being consumed by an engine of a vehicle at any one instant, which method comprises measuring the fuel flow rate to the engine of the vehicle, measuring the vehicle speed, and dividing the vehicle speed by the vehicle fuel flow rate, the method being such that the fuel for the engine is injected through an orifice which is in a fuel injection nozzle and which is opened for fuel injection by vibration by providing the injection nozzle with electrical pulses during periods in which the fuel is to be fed to the engine, and the method also being such that the fuel flow rate is measured by measuring and multiplying together the time that the orifice is open for fuel injection and the repetition frequency of the pulses. This invention also provides apparatus for measuring the distance per amount of fuel that is being consumed by an engine of a vehicle at any one instant, which apparatus comprises fuel flow rate measuring means for measuring the fuel flow rate to the engine, vehicle speed measuring means for measuring the vehicle speed, divider means for dividing the vehicle road speed by the vehicle fuel flow rate, a fuel injection nozzle for injecting the fuel for the engine, an orifice in the injection nozzle through which the fuel is injected, and means for providing the injection nozzle with electrical pulses during periods in which the fuel is to be fed to the engine thereby to open the orifice by vibration, said apparatus being such that the fuel flow rate measuring means includes means for measuring the time that the orifice is open for fuel injection and the pulse repetition frequency of the pulses.</p> |
