Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
1997-07-18
2001-01-30
Miller, Carl S. (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S469000
Reexamination Certificate
active
06178950
ABSTRACT:
TECHNICAL FIELD
The present invention relates generally to brackets for mounting a fuel injector on an engine, and more particularly to a noise reducing bracket for mounting fuel injectors on an engine.
BACKGROUND ART
Engineers are often looking for ways to reduce noise in internal combustion engines. In the case of diesel type engines, one known source of engine noise results from operation of the fuel injection system. Most fuel injectors include several moving components, such as valve members, that come into contact with other injector components at relatively high speeds creating noise. This noise is transferred to the engine since the injector is typically clamped rigidly into an injector bore made in the head of the engine. As an example, the poppet control valve member of a hydraulically actuated fuel injector creates undesirable noise whenever the member is brought to an abrupt stop when it contacts a valve seat. This undesirable noise is transferred to the engine due to the substantially rigid mounting of the injector to the engine head.
The present invention is directed toward reducing noise in an engine that is produced during operation of a fuel injection system.
DISCLOSURE OF THE INVENTION
A noise reducing fuel injection system includes an engine having a head with a first injector bore. A first fuel injector is suspended in the injector bore with a mounting bracket. The mounting bracket has a first clamping portion separated from a support by a first arm portion. The first clamping portion is clamped to the first fuel injector. The support is attached to the head of the engine. The first fuel injector is capable of sliding a slight distance in and out of the first injector bore when the engine is running. One method of accomplishing this sliding is to make the first arm portion slightly flexible so that the injector can slide in and out of the injector bore when the engine is running.
In another embodiment of the present invention, a fuel injector mounting bracket includes a support. A first clamping portion sized to be clamped to a first fuel injector is attached to the support via a first arm. A second clamping portion that is sized to be clamped to a second fuel injector is attached to the support via a second arm that is positioned on the opposite side of the support from the first arm.
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Stockner Alan R.
Youakim Mike
Caterpillar Inc.
McNeil Michael B.
Miller Carl S.
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