A hydraulic air-intake governor for installed in a car near a throttle valve of an engine system of the car, comprising:
- a container being provided at a head portion with a capped water hole via which water is filled into said container, an air inlet pipe for guiding external air to a bottom portion of said container, and an air outlet pipe for guiding air moved from the bottom portion to the head portion of said container to move out of said container;
- and said container always containing a predetermined amount of water therein;
- vertical supports supporting three horizontal steel partitions in said container, namely, upper, middle, and lower steel partitions, said partitions being provided with holes via which air guided to the bottom portion of said container moves upward to the head portion;
- two buoys having a specific gravity close to that of water to separately float on the water between said upper and said middle steel partitions and between said middle and said lower steel partitions, said buoys having a bottom surface of a predetermined area large enough for closing some of said holes on said middle and said lower steel partitions;
- a water level gage connected to and vertically extended in parallel with said container for observation of a water level in said container at any time in order to timely replenish said container with water;
- a vapor/air separator connected to said air outlet pipe extended from said container for sucking vapor and extra air out of said container;
- and
- an air-supply regulator connected downstream to said vapor/air separator with an end thereof indirectly connected to an output end of said vapor/air separator and the other end to an input end of an engine of said engine system, said air-supply regulator including a substantially tubular body, an air-intake branch pipe provided at a lower end of said tubular body with a beveled upper end extended into said tubular body, an air-exit branch pipe connected to an upper end of said tubular body with a flat lower end thereof extended into said tubular body, and a ball disposed in said tubular body between said beveled upper end of said air-intake branch pipe and said flat lower end of said air-exit branch pipe;
- whereby when said engine sucks a large volume of air, said ball is sucked upward to loosely block said flat lower end of said air-exit branch pipe and therefore reduces air supplied to said engine via said air-exit branch pipe, and when said engine sucks a small volume of air, said ball drops to locate above said air-intake branch pipe without blocking said beveled upper end of said air-intake branch pipe to cause any decrease of air flowing into said air-supply regulator via said air-intake branch pipe.