Ambac Industries, Inc.

Richard D Kraus

John A Kimberley

John B Cavanaugh

An improved fuel rack mounting arrangement, particularly for use in an in-line pump, is structured to reduce actuating forces. The fuel rack is supported by a pair of lever arms pivotally connected thereto at longitudinally spaced pivot axes. Each lever arm is also pivotally connected to the pump housing at separate pivot axes. The orientation and positioning of the various pivots are such as to afford longitudinal reciprocation of the rack in response to actuation of one of the levers about its pivot axis by which it is connected to the housing. The actuation may be provided by a stepper motor acting on an extension of the lever. Each lever may include an integral pivot pin and a locking mechanism for captured pivotal mounting of the rack.

Mounting arrangement for fuel rack in fuel injection pump

A fuel injector for a diesel engine for use with a common rail type universal fuel injection system includes an injection piston driven by the common rail pressure fluid to inject a metered quantity of fuel through an injection nozzle. The opening of the nozzle valve is controlled by a compression spring in a conventional manner. The nozzle closing is effected by the introduction of fuel at injection pressure above the nozzle valve which acts in combination with the spring to seat the valve. In the preferred embodiment, means are provided for connecting the nozzle spring chamber with the pumping chamber of the injection piston at or slightly before the end of delivery of injected fuel to the nozzle, thereby producing a sharp cutoff of fuel flow through the nozzle. The valve spring may accordingly be selected to provide an optimum opening force rather than to satisfy the nozzle closing requirements as heretofore necessary.

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Chicopee, MA, United States of America

Richard D Kraus