Frequency variable fuel vapor recovery control system and method for fuel dispenser with self-calibrated vapor liquid ratio

A variable-frequency fuel vapor recovery control system for a fuel dispenser including a self-calibrated vapor liquid ratio comprising,

• a fuel vapor switching valve;
• a fuel vapor recovery pump disposed in fluid communication with said fuel vapor switching valve;
• a fuel tank disposed in fluid communication with said fuel vapor recovery pump;
• a fueling pump disposed in fluid communication with said fuel tank;
• a fuel gun disposed in fluid communication with said fueling pump;
• a fueling pipeline extending between said fuel gun and said fueling pump to connect said fuel gun with said fueling pump;
• a temperature sensor disposed in connection with said fuel gun;
• a fueling flowmeter disposed on said fueling pipeline;
• a controller disposed in signal connection with said fueling flowmeter;
• a recovery electrical motor disposed in connection with said vapor fuel recovery pump;
• said temperature sensor being disposed in signal connection with said controller for generating temperature signals to control said recovery electrical motor and said vapor fuel recovery pump;
• and
• a fuel vapor flowmeter disposed in signal connection with said controller for measuring a fuel vapor recovery amount and generating a fuel vapor recovery amount signal to control said recovery electrical motor and said fuel vapor recovery pump.