Patents by Inventor Maoqing LI

Maoqing LI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Frequency variable fuel vapor recovery control system and method for fuel dispenser with self-calibrated vapor liquid ratio
    Patent number: 10501309
    Abstract: A fuel vapor recovery control system includes a controller, a recovery electrical motor, a fuel vapor switching valve, a fuel vapor recovery pump, a fuel tank, a fueling pump, a fuel gun, and a temperature sensor connected in sequence. A fueling flowmeter is arranged on a fueling pipeline, in signal connection with the controller, the recovery electrical motor and the fuel vapor recovery pump in sequence. The temperature sensor is in signal connection with the controller for controling the recovery electrical motor and the fuel vapor recovery pump by temperature signals. The fuel vapor recovery control system includes a fuel vapor flowmeter for measuring the fuel vapor recovery amount, in signal connection with the controller for controling the recovery electrical motor and the fuel vapor recovery pump by fuel vapor recovery amount signals. The fuel vapor recovery ratio is between 1-1.4. A method of adopting the system is provided herein.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: December 10, 2019
    Assignee: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
    Inventors: Yajun Liu, Maoqing Li, Yeqing Chen
  • Frequency Variable Fuel Vapor Recovery Control System And Method For Fuel Dispenser With Self-Calibrated Vapor Liquid Ratio
    Publication number: 20170349427
    Abstract: A fuel vapor recovery control system includes a controller, a recovery electrical motor, a fuel vapor switching valve, a fuel vapor recovery pump, a fuel tank, a fueling pump, a fuel gun, and a temperature sensor connected in sequence. A fueling flowmeter is arranged on a fueling pipeline, in signal connection with the controller, the recovery electrical motor and the fuel vapor recovery pump in sequence. The temperature sensor is in signal connection with the controller for controling the recovery electrical motor and the fuel vapor recovery pump by temperature signals. The fuel vapor recovery control system includes a fuel vapor flowmeter for measuring the fuel vapor recovery amount, in signal connection with the controller for controling the recovery electrical motor and the fuel vapor recovery pump by fuel vapor recovery amount signals. The fuel vapor recovery ratio is between 1-1.4. A method of adopting the system is provided herein.
    Type: Application
    Filed: June 30, 2015
    Publication date: December 7, 2017
    Inventors: Yajun LIU, Maoqing LI, Yeqing CHEN