Exhaust-gas-recirculation system for use in diesel engines

In an exhaust-gas-recirculation system for use in a diesel engine having an intake pipe connected to the engine to introduce fluid thereinto and an exhaust pipe connected to the engine to discharge exhaust gas therefrom, said system including an exhaust-gas-recirculation passage having one end thereof connected to said intake pipe and the other end connected to said exhaust pipe, and valve means associated with said exhaust-gas-recirculation passage to control the flow rate of the exhaust gas to be recirculated from said exhaust pipe to said intake pipe through said exhaust-gas-recirculation passage, the improvement which comprises:

• a shaft rotatable in synchronization with the engine;
• a fly-weight mounted on said shaft to produce a centrifugal force upon the rotation of said shaft;
• a governor member movable in response to a thrust acting thereon due to the centrifugal force produced by said fly-weight;
• at least one control spring acting against the thrust on said governor menber and having a spring load variable in response to the change in amount of depression of an accelerator pedal;
• and
• actuating means operative in response to the movement of said governor member to actuate said valve means.