Centrifugal rpm governor for fuel injected internal combustion engines

Claim 1

In a centrifugal rpm regulator for fuel injected internal combustion engines, especially diesel engines, including a housing mounting; centrifugal weight means, an adaptor sleeve slidably displaceable under the influence of the centrifugal weight means and as a function of engine rpm, an intermediate lever, a fuel quantity control rod, the adaptor sleeve transmitting the forces associated with its controlled motions resulting from its slidable displacement through the intermediate lever to the fuel quantity control rod for adjusting the fuel quantity delivered by an injection pump used in conjunction with the regulator, an abutment structure which serves to limit the movement of the control rod in the direction of increasing fuel supply, the abutment structure being fixedly connected to the regulator housing and being pivotable as a function of engine rpm to thereby determine the maximum fuel quantity, and means coupling the adaptor sleeve to the abutment structure, the abutment structure having a cam plate including a cam sector that determines the starting excess fuel quantity and also the full load fuel supply quantity, a shaft on which the cam plate is mounted, a cam follower member, and means connecting the cam follower member to the control rod, the cam follower member being adapted to abut the cam sector whenever the maximum fuel supply quantity corresponding to a particular rpm is delivered, the improvement comprising: a. a further cam plate, wherein the cam plate of the abutment structure and said further cam plate constitute a first and second cam plate, respectively, said second cam plate being mounted on the shaft mounting the first cam plate to be parallel therewith and rotatable independently thereof, said second cam plate also being adapted to operatively engage with the cam follower member; and b. a control apparatus which functions in dependence on the temperature of an operating medium such that when an operating medium temperature is reached which corresponds to an operationally warmed-up engine a portion of the second cam plate blocks the cam sector of the first cam plate from being engaged by the follower member thereby preventing the delivery of a starting excess fuel quantity, and when the operating medium temperature reached is below a temperature which corresponds to an operationally warmed-up engine, the cam follower member abuts the cam sector of the first cam plate so that at least a partial starting excess fuel quantity is delivered.