Centrifugal governor for internal combustion engines, having a function of releasing adaptation means

In a centrifugal governor for combination with an internal combustion engine, including:

• flyweights radially displaceable in response to the rotational speed of said engine;
• a shifter movable in response to radial displacement of said flyweights;
• a tension lever having one end pivotally supported by a stationary shaft and another free end disposed for urging contact with said shifter;
• an adaptation spring disposed for counteracting movement of said shifter caused by radially outward displacement of said flyweights;
• a control spring arranged for applying biasing force to said tension lever in a direction counteracting radially outward displacement of said flyweights;
• a guide lever connected between said one end of said tension lever and said shifter;
• a floating lever having one end engaging a control rack;
• a supporting lever having one end engaging said another free end of said tension lever and another end engaging another end of said floating lever, said supporting lever being angularly displaceable about said one end thereof;
• a fuel quantity increasing lever having one end engaging said guide lever and another end engaging an intermediate portion of said floating lever;
• and an adjusting member carried by said tension lever, said adjusting member having one end disposed for urging contact with an intermediate portion of said fuel quantity increasing lever;
• wherein when the rotational speed of said engine exceeds a predetermined value, said adjusting member comes into urging contact with said fuel quantity increasing lever as said shifter is moved in response to radially outward displacement of said flyweights, further movement of said shifter causing contraction of said adaptation spring whereby said fuel quantity increasing lever is angularly displaced about said intermediate portion thereof to cause said floating lever to displace said control rack in a fuel quantity increasing direction thereof;
• the improvement comprising means responsive to angular displacement of said supporting lever to displace said adjusting member relative to said fuel quantity increasing lever, said displacing means being adapted to bring said adjusting member into urging contact with said fuel quantity increasing lever when the rotational speed of said engine exceeds a predetermined value at full load operation of said engine, whereby contraction of said adaptation spring causes angular displacement of said fuel quantity increasing lever for increasing fuel injection quantity.