A fuel line check valve system and a fuel system that includes the fuel line diaphragm valve system are described. The fuel line diaphragm valve system may prevent flow into a fuel system that is generated via a vacuum in the fuel system. The fuel line diaphragm valve may also remain in an open state after it is open via a reduced pressure.

A connection assembly is used to detachably connect fuel injector to an injector cup of a fuel rail. The connection assembly includes the injector cup that receives and supports the fuel injector, a pair of retaining pins that an configured to retain an inlet end of the fuel injector within a bore of the injector cup, and a retaining clip that retains the retaining pins in corresponding through holes provided in the injector cup. The retaining clip is C-shaped and partially encircles the injector cup such that a first end of the retaining clip extends into the through hole that receives the first pin, the second end of the retaining clip extends into the through hole that receives the second pin. The retaining clip is configured to prevent the pins from exiting the respective through holes and minimize assembly noise.

The flexibility of the attachment angle and attachment interval of the member (e.g., injector) attached to the joint member is increased to improve the flexibility of layout even in the case of the forged rail for high-pressure direct injection. In addition, the manufacturing cost can be reduced while keeping high strength of the joint portion. A rail body 1 manufactured by forging, the rail body 1 having a through hole 4 opened on a wall surface 3 for communicating a fuel passage 2 extending in an axial direction with an outside; and a tubular joint member 6 manufactured separately from the rail 1 body and fixed to the rail body 1 at a position of the through hole 4 for allowing a fuel to flow from the fuel passage 2 through the through hole 4 are provided.

A monolithic fuel rail structure is configured to receive and support a fuel injector, and includes a log, an injector cup that protrudes integrally from an outer surface of the log, and a fuel passage. An inner surface of the log defines a main fuel channel, and the injector cup includes a bore that opens at one end of the injector cup. An inlet end of the fuel injector is received in the bore. The fuel passage provides fluid communication between the bore and the main fuel channel, and the fuel passage corresponds to a portion of a hole that extends through the injector cup on each of opposed sides of the injector cup.

A component for an injection system for mixture-compressing, spark-ignition internal combustion engines, which is used to apportion a fluid under high pressure, in particular a highpressure line or fluid manifold. The component includes a main body on which at least one hydraulic connection is provided, at least the main body having the connection being formed by single stage or multistage forging, an interior being formed on the main body by chip-removing machining after forging and a connection channel, which intersects with the interior in an intersection region, being formed at the connection by chip-removing machining after forging. The intersection region is deburred by mechanical deburring. An injection system and a method for producing such a component are also described.

A high-pressure fuel pipe is a pipe disposed between an injector and a high-pressure fuel pump, the high-pressure fuel pump is provided on a downstream side of a low-pressure fuel pump, an engine is a single cylinder or a two-cylinder, the high-pressure fuel pump is a plunger type that performs pressurization once or twice per rotation in synchronization with a camshaft of the engine, and a volume of the high-pressure fuel pipe is k×Q/ΔP/1000×n or less, where k is a volume modulus of fuel, Q is a maximum discharge amount of the fuel in one reciprocation of the high-pressure fuel pump, ΔP is a difference between a target fuel pressure boosted by the high-pressure fuel pump and a feed fuel pressure boosted by the low-pressure fuel pump, and n is the number of times of boosting in one rotation of the high-pressure fuel pump.

A method of adaptively predicting, during operation of a pump, a mass of fuel pumped by the pump during a pumping event to a fuel accumulator (“Q.sub.pump”) to control operation of the pump is provided, comprising: generating an adaptive model of operation of the pump, including estimating a start of pumping (“SOP”) position of a plunger of the pump, estimating Q.sub.pump, determining a converged value of the estimated SOP position, and determining a converged value of the estimated Q.sub.pump; using the adaptive model to predict Q.sub.pump by inputting to the model the converged value of the estimated SOP position, a measured pressure of fuel in the fuel accumulator and a measured temperature of fuel in the fuel accumulator; and controlling operation of the pump in response to the predicted Q.sub.pump.

Separation of carbon dioxide from the exhaust of an internal combustion engine, the production of hydrogen from water, and reformation of carbon dioxide and hydrogen into relatively high-octane fuel components.

A method of controlling an engine system includes controlling a fuel injector to perform a zero-fueling injector operation during operation of the engine, the zero-fueling injector operation including a non-zero injector on-time resulting in zero fueling by the injector, determining an injection system pressure change associated with the zero-fueling injector operation, modifying at least one fuel injection control parameter in response to the injection system pressure change, and using the modified fuel injection control parameter to control injection of fuel by the fuel injector during operation of the engine.

A connection assembly is used to connect a first body to a second body. The first body includes a bore that is coaxial with a first axis, and a retainer opening that extends coaxially with a second axis. The second axis is perpendicular to the first axis and offset relative to the first axis. In addition, a portion of the retainer opening intersects the bore. The second body includes an insertion portion that is disposed in the bore, a fluid passage that extends through the insertion portion and communicates with the bore, and an outer surface of the second body has a channel. The connection assembly employs an elastic retaining pin that retains the insertion portion within the bore. The retaining pin is disposed in the retainer opening such that a portion of the retaining pin resides in the channel, and the retaining pin is self-aligning and self-retaining.