Governor

A governor for use in an engine provided with an overspeed protection device which is arranged to trip in the event that engine speed exceeds a predetermined speed, the governor comprising a centrifugal weight mechanism comprising at least one weight coupled to an angularly adjustable metering valve member through a lever member, the metering valve member being operable to control the level of fuelling of the associated engine depending on engine speed, the governor further comprising a damping arrangement associated with the lever member which is arranged to damp oscillatory movement of the lever member, in use, and a prevention arrangement for preventing the overspeed protection device associated with the engine from tripping upon engine start up, wherein the damping arrangement takes the form of a hydraulic damping arrangement, and wherein the damping arrangement includes a damping piston which is slidable within a bore provided in a housing against a damping spring arrangement, the bore defining a working chamber for receiving a fluid which applies a force on the damping piston to oppose the damping force.

A governor for use in an engine provided with an overspeed protection device which is arranged to trip in the event that engine speed exceeds a predetermined speed, the governor comprising a centrifugal weight mechanism comprising at least one weight coupled to an angularly adjustable metering valve member through a lever member, the metering valve member being operable to control the level of fuelling of the associated engine depending on engine speed, the governor further comprising a damping arrangement associated with the lever member which is arranged to damp oscillatory movement of the lever member, in use, and a prevention arrangement for preventing the overspeed protection device associated with the engine from tripping upon engine start up, wherein the damping arrangement takes the form of a hydraulic damping arrangement comprising a damping piston and a working chamber for receiving a fluid, whereby fluid pressure within the working chamber acts on a surface associated with the damping arrangement, and a restricted outlet for permitting fluid to flow into and out of the working chamber at a relatively low rate, the damping arrangement being provided with a by-pass arrangement to permit fluid to flow out of the working chamber at a higher, relatively unrestricted rate, thereby by-passing the restricted outlet and causing the damping arrangement to be disabled.