Electric governor

Claim 1

An electric governor for attachment to a fuel injection pump for an internal combustion engine, the pump having an elongated movable fuel injection regulating member and a cam shaft, comprising: a governor casing attachable to the fuel injection pump with the regulating member and the cam shaft projecting into said governor casing; a solenoid type electromagnetic actuator fixed to said governor casing including a first coil, the axis of which is substantially parallel to the regulating member, and an output rod which is inserted into said coil to be substantially parallel to the regulating member, said output rod being movable axially in response to an electric signal to be applied to said coil; a position detector detachably secured to said casing transversely of the regulating member, said first coil and said output rod, and including a second coil and a core which are positioned transversely of the regulating member, said first coil and said output rod, said core being movable reciprocally in said second coil and extending from said position detector into said casing, said position detector being removable from said casing from the exterior thereof, a link mechanism positioned in said casing between said output rod and said core with the regulating member therebetween, said mechanism including: a block detachably fixed to said casing; a shaft extending through said block, said shaft being positioned at a side of said output rod opposite said position detector and at a side of the regulating member remote from said actuator; a first lever connected between said output rod and said shaft to transmit reciprocal movements of said output rod to said shaft to oscillate the latter, said first lever being substantially in transverse relationship to said output rod; a second lever positioned between said shaft and the regulating member to transmit oscillating movements of said shaft to the regulating member to reciprocate the latter, said second lever being substantially parallel to said first lever; and a third lever positioned between said shaft and said core of said position detector to transmit oscillating movements of said shaft to said core to reciprocate the latter, said third lever being substantially normal to said first and second levers; a spring supported by said position detector and said core in such a manner that said spring biases said third lever so as to balance with the electromagnetic force generated by said electromagnetic actuator; and an electromagnetic pick-up fixed to said casing for detecting the rotational speed of the cam shaft, an electric signal from said pick-up being used to energize said first coil of said electromagnetic actuator.