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A dispenser for delivering different grades of gasoline through a single nozzle at each fueling position, includes a pair of hoses connected to the nozzle, one of which hoses is used for selectively delivering high octane gasoline, and the other of which hoses is for selectively delivering either lo

A dispenser for delivering different grades of gasoline through a single nozzle at each fueling position, includes a pair of hoses connected to the nozzle, one of which hoses is used for selectively delivering high octane gasoline, and the other of which hoses is for selectively delivering either low octane or mid octane gasoline through the nozzle, whereby a control system is programmed for monitoring the dispensing of low octane gasoline relative to the dispensing of mid octane gasoline, for injecting a sufficient quantity of high octane gasoline through the nozzle at the initiator of a mid octane dispensing cycle for compensating for low octane fuel remaining in the other hose from an immediately prior low octane dispensing cycle relative to a mid octane dispensing cycle.

대표청구항 ▼

In a multi-fuel dispenser with a single nozzle per fueling position, including a nozzle having an inlet port; first and second hoses each having one end for discharging fuel into said inlet port; low and mid octane flow-control valves each having an outlet port connected to the other end of said fir

In a multi-fuel dispenser with a single nozzle per fueling position, including a nozzle having an inlet port; first and second hoses each having one end for discharging fuel into said inlet port; low and mid octane flow-control valves each having an outlet port connected to the other end of said first hose, and an inlet port connected to low and mid octane fuel supplies, respectively; and a high octane flow-control valve having an outlet port connected to the other end of said second hose, and an inlet port connected to a high octane fuel supply; a method for compensating for residual low octane fuel filling said first hose at the initiation of a mid octane fuel dispensing cycle, comprising the steps of: monitoring the dispensing of low octane fuel relative to mid octane fuel; turning on for a relatively short pulse-like period of time said high octane flow-control valve during a mid octane fuel dispensing cycle that immediately follows a low octane fuel dispensing cycle, for partially compensating for the residual low octane fuel dispensed during the mid octane fuel dispensing cycle; turning off said high octane flow-control valve; turning on for a relatively short pulse-like period of time said mid octane flow control valve; turning off said mid octane flow control valve; repeating the previous four steps in an iterative manner until the residual low octane fuel is fully compensated; and turning on said mid octane flow control valve for a period of time necessary to complete the dispensing of a desired quantity of mid octane fuel. A multi-fuel dispenser with a single nozzle per fueling position, comprising: low octane, mid octane, and high octane individual pressurized sources of gasoline; a nozzle having an inlet port; first and second hoses each having one end for discharging gasoline into said inlet port of said nozzle; a first flow control valve connected between said low octane source of gasoline and the other end of said first hose; a second flow control valve connected between said mid octane source of gasoline and the other end of said first hose; a third flow control valve connected between said high octane source of gasoline and the other end of said second hose; and controller means programmed for (1) turning on only said third flow-control valve whenever high octane fuel is to be delivered from said nozzle, (2) turning on only said first flow control valve whenever low octane fuel is to be delivered from said nozzle, and (3) whenever mid octane fuel is to be delivered from said nozzle, in a first mode of operation only turning on said second flow control valve whenever the last delivery of fuel through said first hose was mid octane fuel, and in a second mode of operation subsequent to delivery of low octane fuel through said first hose, turning on said second flow-control valve, and turning on said third flow-control valve only for a period of time sufficient to mix in enough high octane gasoline for compensating for said first hose full of low octane gasoline.