Aneroid for a turbocharged engine

An aneroid for use in a fuel supply system for an internal combustion engine including a turbocharger, wherein the quantity of fuel injected in each cycle of the engine is controlled by adjusting the pressure of the fuel in a fuel supply rail, comprising valve means adapted to be connected in said rail and operable to adjust the rail pressure, first means adapted to respond to the pressure boost of the turbocharger and operatively coupled to said valve means for adjusting the rail pressure, and second means adapted to respond to the rail pressure downstream of the aneroid and connected to said valve means for adjusting the rail pressure, said first means being operable to increase the rail pressure with an increase in turbocharger boost and said second means being operable to reduce the rail pressure with an increase in the rail pressure downstream of the aneroid, said first means comprising a diaphragm having a side connected to said valve means by an adjusting spring.

An aneroid for use in a fuel supply system for an internal combustion engine including a turbocharger, wherein the quantity of fuel injected in each cycle of the engine is controlled by adjusting the pressure of the fuel in a fuel supply rail, comprising valve means adapted to be connected in said rail and operable to adjust the rail pressure, first means adapted to respond to the pressure boost of the turbocharger and operatively coupled to said valve means for adjusting the rail pressure, and second means adapted to respond to the rail pressure downstream of the aneroid and connected to said valve means for adjusting the rail pressure, said first means being operable to increase the rail pressure with an increase in turbocharger boost and said second means being operable to reduce the rail pressure with an increase in the rail pressure downstream of the aneroid, and further including adjustable means engagable with said valve means for limiting the reduction in rail pressure when the turbocharger does not produce a pressure boost.

An aneroid for a fuel system of an engine including a turbocharger, a plurality of injectors, a rail for carrying fuel to the injectors, and means for supplying and regulating the pressure of the fuel in the rail, said aneroid comprising valve means connected in the rail and operable to adjust the fuel pressure in the rail, said valve means including a movable member which is movable to adjust the fuel flow area through the rail and thereby adjust the fuel pressure downstream of the aneroid, said aneroid further including manifold air pressure responsive means operatively coupled to said member and operable to move said member in the direction to increase the fuel flow area in response to an increase in the manifold pressure, and rail pressure responsive means operatively coupled to said member and operable to decrease the fuel flow area in response to an increase in the fuel pressure in the rail downstream of the aneroid.

An aneroid for a turbocharged engine including a plurality of injectors, a rail for supplying fuel to the injectors, and pressure regulator means for regulating the fuel pressure in the rail, said aneroid comprising a housing having a bore formed therein, an inlet passage connected to said bore and adapted to be connected to said rail upstream of said aneroid, an outlet passage connected to said bore and adapted to be connected to said rail downstream of said aneroid, a valve member movable in said bore and operable to form a variable area fuel flow passage between said inlet and outlet passages, first means responsive to the turbocharger boost and operable to move said member to increase said area in response to an increase in boost, and second means responsive to the rail fuel pressure downstream of said aneroid and operable to move said member to decrease said area in response to an increase in rail fuel pressure.

An aneroid for a turbocharged engine including a plurality of injectors, a rail for supplying fuel to the injectors, and pressure regulator means for regulating the fuel pressure in the rail, said aneroid comprising a housing having a bore formed therein, an inlet passage connected to said bore and adapted to be connected to said rail upstream of said aneroid, an outlet passage connected to said bore and adapted to be connected to said rail downstream of said aneroid, a valve member movable in said bore and operable to form a variable area fuel flow passage between said inlet and outlet passages, first means responsive to the turbocharger boost and operable to move said member to increase said area in response to an increase in boost, and second means responsive to the rail fuel pressure downstream of said aneroid and operable to move said member to decrease said area in response to an increase in rail fuel pressure, said second means comprising a chamber formed in said housing and adapted to receive fuel from the rail downstream of the aneroid, a piston movable in said chamber, and a spring connecting said piston and said member, and further including a second spring which is engagable with said piston only after said piston has moved a predetermined distance.

An aneroid for a turbocharged engine including a plurality of injectors, a rail for supplying fuel to the injectors, and pressure regulator means for regulating the fuel pressure in the rail, said aneroid comprising a housing having a bore formed therein, an inlet passage connected to said bore and adapted to be connected to said rail upstream of said aneroid, an outlet passage connected to said bore and adapted to be connected to said rail downstream of said aneroid, a valve member movable in said bore and operable to form a variable area fuel flow passage between said inlet and outlet passages, first means responsive to the turbocharger boost and operable to move said member to increase said area in response to an increase in boost, and second means responsive to the rail fuel pressure downstream of said aneroid and operable to move said member to decrease said area in response to an increase in rail fuel pressure, said first means comprising a diaphragm having one side thereof responsive to the turbocharger boost, and a spring connecting the other side of said diaphragm with said member.

An aneroid for a turbocharged engine including a plurality of injectors, a rail for supplying fuel to the injectors, and pressure regulator means for regulating the fuel pressure in the rail, said aneroid comprising a housing having a bore formed therein, an inlet passage connected to said bore and adapted to be connected to said rail upstream of said aneroid, an outlet passage connected to said bore and adapted to be connected to said rail downstream of said aneroid, a valve member movable in said bore and operable to form a variable area fuel flow passage between said inlet and outlet passages, first means responsive to the turbocharger boost and operable to move said member to increase said area in response to an increase in boost, and second means responsive to the rail fuel pressure downstream of said aneroid and operable to move said member to decrease said area in response to an increase in rail fuel pressure, and further including adjustable means for setting the position of said valve member in the absence of a turbocharger boost.