초록 ▼

A fuel additive system of a fuel delivery system of a vehicle includes an additive tank assembly, and a dosing unit in communication with the additive tank assembly to control the amount of additive dosed to the fuel tank. The additive tank assembly includes a pressurized tank of generally torispher

A fuel additive system of a fuel delivery system of a vehicle includes an additive tank assembly, and a dosing unit in communication with the additive tank assembly to control the amount of additive dosed to the fuel tank. The additive tank assembly includes a pressurized tank of generally torispherical or ellipsoidal shape, a tank conduit with one end in communication with a sump in the pressurized tank and an opposite end extending out of the pressurized tank, and a valve in communication with the tank conduit near the opposite end thereof and being normally closed under pressure from the pressurized tank. The dosing unit includes a housing having an inlet passage in communication with the tank conduit, and a valve actuator in the inlet passage to displace the valve of the additive tank assembly to an open position once the dosing unit is assembled to the additive tank assembly.

대표청구항 ▼

What is claimed is: 1. A fuel additive system, comprising:a fuel level sensor sensing the level of fuel in a fuel tank and providing an electric signal indicative of the level of fuel in the fuel tank;a pressurized additive tank having at least one wall defining an interior receiving a pressurized p

What is claimed is: 1. A fuel additive system, comprising:a fuel level sensor sensing the level of fuel in a fuel tank and providing an electric signal indicative of the level of fuel in the fuel tank;a pressurized additive tank having at least one wall defining an interior receiving a pressurized propellant gas and with a low-lying collection area receiving a liquid additive pressurized by the gas with the pressure of the liquid additive changing in response to each dispensing of liquid additive from the pressurized additive tank and change in temperature of the propellant gas in the pressurized additive tank, and further having an opening through the at least one wall;a tank conduit having one end in communication with the low-lying liquid additive collection area of the pressurized additive tank, extending at least partially through the opening of the pressurized additive tank, and terminating in an opposite end to the outside of the pressurized additive tank; anda valve in communication with the tank conduit substantially at the opposite end thereof and being normally closed under fluid pressure in the pressurized additive tank;a dosing unit in communication with the pressurized additive tank assembly, including:a housing having an inlet passage in communication with the tank conduit of the pressurized additive tank downstream of the valve; anda valve actuator disposed in the inlet passage of the housing to displace the valve of the pressurized additive tank to an open position for the flow of pressurized liquid additive from the pressurized additive tank through the tank conduit to the inlet passage of the dosing unit;at least one electric sensor of an additive pressure sensor sensing the pressure of the additive in the pressurized additive tank and providing an electric signal indicative of the pressure of the additive therein or an additive temperature sensor sensing the temperature of the gas pressurizing the additive in the pressurized additive tank and providing an electric signal indicative of the temperature of the gas therein;a metering valve in communication with the inlet passage of the housing to control a desired amount of additive to flow therethrough to the fuel tank; andan electronic control module in communication with and utilizing the electric signal of the fuel level sensor to determine that a refueling event of the fuel tank has occurred and in response to the refueling event utilizing at least an electric signal of the at least one sensor to determine for an injection event a pressure of the liquid additive in the pressurized additive tank;the control module having an electronic processor determining an injection period of time for the liquid additive for the injection event based on the determined pressure of the liquid additive in the pressurized additive tank and electric signals from the fuel level sensor; andthe control module controls opening of the metering valve for the determined injection period of time for the injection event to supply liquid additive to the fuel tank.