摘要:
A module which fits into a cup attached to the bottom of an automotive fuel tank contains a fuel pump, a fuel filter, a jet pump and associated manifold components for maintaining a minimum level of fuel in a reservoir to provide a continuous source of fuel to the fuel pump when the tank fuel level is low or when vehicle operations, such as cornering, braking, acceleration, or slope parking cause the tank fuel level to fall below the fuel pump inlet.
摘要:
An arrangement for supplying fuel from a supply container to an internal combustion engine of a motor vehicle, has a supply tank having an interior with a separate chamber, a supply aggregate having a suction side connected with the supply tank and a pressure side connectable with the internal combustion engine, the supply aggregate receiving fuel from the separate chamber of the supply tank, a branching conduit connected with the pressure side of the supply aggregate and having a portion extending near a bottom of the supply tank, an ejector arranged in the portion of the branching conduit and having a pressure pipe opening in the chamber of the supply tank, and a check valve provided in the branching conduit upstream of the ejector as considered in a flow direction of fuel, and opening in the branching conduit after a predetermined limiting pressure has been exceeded.
摘要:
The invention is directed to a membrane fuel pump for a membrane carburetor of an internal combustion engine. The carburetor has a pressure controller and the engine has a crankcase wherein pressure fluctuates during the operation thereof. The membrane fuel pump includes a pump membrane mounted in a housing which partitions a space of the housing into a pump chamber for receiving fuel from a fuel supply connection and a drive chamber. The drive chamber is charged with the pressure of the crankcase. A pressure connection connects the pump chamber to the pressure controller of the membrane carburetor. A bypass channel connects the pressure connection to the fuel supply connection and a valve is interposed between the pressure connection and the bypass channel. This valve is responsive to the pressure present in the pressure connection for switching the valve between a first position wherein the bypass channel is open to the pressure connection and a second position wherein the bypass channel is closed to the pressure connection.
摘要:
A modular fuel delivery system including a reservoir in fuel tank, an electric high pressure pump in the reservoir fed only from inside the reservoir, and a jet pump fed only from the fuel tank and discharging into the reservoir to keep the latter filled and energized from the high pressure pump. A check valve is disposed between the jet pump inlet and the fuel tank to prevent backflow into the fuel tank. A partition on the bottom of the reservoir separates the jet pump discharge from the high pressure pump inlet and defines a standpipe around and above the jet pump discharge so that the jet pump stays submerged in fuel when the high pressure pump empties the reservoir. The pumping efficiency of the jet pump when submerged is better than when dry so that the delay in restarting the engine after the both the fuel tank and the resvoir are pumped empty is minimized.
摘要:
A fuel delivery system for internal combustion engines in which an electric-motor fuel pump supplies fuel under pressure from a tank to a fuel injector carried by the engine, and excess fuel is returned by a pressure regulator from the engine to the supply tank. A restriction is positioned in the fuel return line to restrict flow of return fuel therethrough, and thereby create a back-pressure of fuel in the return line. A pressure sensor is coupled to the return line between the pressure regulator and the restriction and drives the fuel pump as an inverse function of fuel pressure in the return line, and thus as a direct function of fuel demand at the engine.
摘要:
In a dashpot for fuel tanks the cover of the intake chamber of the dashpot is dome-shaped and the suction filter is arranged at an interval below the cover. This arrangement prevents gas bubbles also being drawn off via the suction filter together with fuel.
摘要:
A dashpot for fuel tanks is designed such that gas bubbles produced in the latter can no longer cause troublesome noises within the fuel tank. This is achieved by means of a gas separation space which is separated from the dashpot intake chamber, into which a fuel return line opens and to the upper wall of which a degassing line discharging above the maxiumum fuel level in the fuel tank is connected.
摘要:
A bottom wall of a fuel tank body defines an inwardly extending projection which separates at least a lower segment of an interior of the fuel tank body into a first fuel chamber and a second fuel chamber. Fuel is pumped out of the first fuel chamber. A portion of the fuel pumped out of the first fuel chamber is returned to the first fuel chamber by way of an ejector pump disposed within the fuel tank body. The ejector pump is driven by the return fuel. A communication pipe connects the second fuel chamber to the ejector pump. The ejector pump transports fuel from the second fuel chamber to the first fuel chamber via the communication pipe.
摘要:
In an emission control system for a vehicle powered by an internal combustion engine, the purge of fuel vapor from a canister containing fuel vapor is effected through a purge valve operated by a control vacuum signal, as controlled by operation of a thermal vacuum switch, which signal is also applied to an exhaust gas recirculating valve, acting on one side of a diaphragm in the purge valve, the diaphragm being operative to control flow of fuel vapor supplied to a compartment on the opposite side of the diaphragm via a restricted inlet passage from the canister to a passage having a positive crankcase ventilation vacuum signal applied thereto with flow through the passage controlled by movement of the diaphragm.
摘要:
A unitary structure for a vehicle engine which provides an air cleaning function, a fuel vapor storage function and a valve cover function. The structure may be molded or cast in a configuration particularly adapted to be secured to the outer portion of an engine cylinder head thus forming an enclosure means for valve components such as rocker arms and a camshaft if the engine is an overhead cam type engine. First and second wall means are spaced progressively outward from the cylinder head to form a space therebetween adapted to hold a quantity of activated charcoal. The charcoal is connected to the fuel tank and carburetor to trap and store fuel vapors therefrom. Another space is formed above the second wall means to house an air filter element. Air inlet and outlet means are located below and above the filter element to provide for a flow of air to the engine carburetor.