Toilet bowl flushing device

A toilet bowl flushing device comprising:

• water supply means for supplying flushing water through a water supply pipe to a toilet bowl, said water supply means including flow rate control valve means having a valve disposed in said water supply pipe, for varying the rate of flow of flushing water supplied to the toilet bowl through control of an open condition of said valve;
• an actuator for actuating said flow rate control valve means;
• control means for controlling operation of said actuator;
• said control means comprising a memory storing a predetermined flow rate pattern, said control means controlling .Operation of said actuator to vary said open condition of said valve stepwise with time in one flushing cycle according to said predetermined flow rate pattern stored in said memory so that the flushing water is supplied to the toilet bowl at a flow rate which varies stepwise with time;
• said control means controls operation of said actuator according to the predetermined flow rate pattern stored in said memory so that flushing water is supplied to the toilet bowl at multiple different flow rates during said one flushing cycle;
• said predetermined flow rate pattern is adapted to provide an optimum flushing effect based on a configuration of said toilet bowl;
• and
• said memory stores a plurality of predetermined flow rate patterns, said control means comprising means for controlling operation of said actuator according to a selected one of the flow rate patterns stored in said memory.