Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2000-01-27
2001-07-24
Moulis, Thomas N. (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S502000, C123S372000
Reexamination Certificate
active
06263861
ABSTRACT:
This invention relates to a governor suitable for use in controlling the quantity of fuel supplied to a cylinder of an associated internal combustion engine.
In known governor arrangements for use in controlling the operation of the engines of alternator and generator sets, a centrifugal weight mechanism is arranged to be rotated at a speed associated with the operating speed of the engine. The weight mechanism acts against a lever which is spring biased towards a rest position. The lever is coupled to the valve member of a throttle or metering valve. In use, upon the speed of operation of the engine varying due to a change in load, the force applied to the lever by the weights varies resulting in the lever moving. The change in position of the lever results in the setting of the metering valve changing. In use, the quantity of fuel supplied through the metering valve is arranged to reduce with increasing engine speed. As a result, the engine is controlled in such a manner as to operate at a near constant speed.
Variations in the spring rate and in the geometry of other components of the governor may result in the presence of differences in the operation of governors of identical nominal specifications. Further, the performance of a particular governor may vary, for example as a result of wear. It is an object of the invention to provide a governor suitable for use with an engine intended to be operated at near constant speed in which the effects of these disadvantages are mitigated.
According to the present invention there is provided a governor comprising a metering valve member slidable within a bore to control the degree by which an outlet is obscured, the valve member and bore together defining first and second chambers, a restricted flow passage whereby fuel can flow from the first chamber to the second chamber at a restricted rate, and a control valve controlling communication between the second chamber and a low pressure reservoir, the control valve being adjustable by a centrifugal weight mechanism.
The restricted flow passage is conveniently defined by a passage extending through the metering valve member.
REFERENCES:
patent: 1 475 065 (1973-05-01), None
patent: 1 579 334 (1976-06-01), None
patent: 1 552 737 (1977-12-01), None
Andrus Sceales, Starke & Sawall
Delphi Technologies Inc.
Moulis Thomas N.
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