Patents by Inventor Yiqiang Pei

Yiqiang Pei 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).

  • Self-adaptive hydraulic variable valve timing system for diesel engine and control method
    Patent number: 9163531
    Abstract: Self-adaptive hydraulic variable valve timing system for an internal combustion diesel engine, comprising an electronic control unit, an oil pump, a pressure regulating reversing valve, an oil return tube, an oil line, an oil supply main tube, an oil supply branch tube, and a self-adaptive pushrod length changing assembly. When the engine's oil exceeds 70° C., and engine's rotational speed is greater than or equal to 1300 r/m, and engine's load is greater than or equal to 50%, the control unit is configured to send instructions to the pressure regulating reversing valve to switch oil flow direction towards the oil line which leads to the self-adaptive pushrod length changing assembly and thereby put the engine in an operating mode.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: October 20, 2015
    Inventors: Wanhua Su, Qiang Zhan, Yiqiang Pei, Erxi Liu, Songlin Wu
  • SELF-ADAPTIVE HYDRAULIC VARIABLE VALVE TIMING SYSTEM FOR DIESEL ENGINE AND CONTROL METHOD
    Publication number: 20130125844
    Abstract: Self-adaptive hydraulic variable valve timing system for an internal combustion diesel engine, comprising an electronic control unit, an oil pump, a pressure regulating reversing valve, an oil return tube, an oil line, an oil supply main tube, an oil supply branch tube, and a self-adaptive pushrod length changing assembly. When the engine's oil exceeds 70° C., and engine's rotational speed is greater than or equal to 1300 r/m, and engine's load is greater than or equal to 50%, the control unit is configured to send instructions to the pressure regulating reversing valve to switch oil flow direction towards the oil line which leads to the self-adaptive pushrod length changing assembly and thereby put the engine in an operating mode.
    Type: Application
    Filed: October 29, 2010
    Publication date: May 23, 2013
    Inventors: Wanhua Su, Qiang Zhan, Yiqiang Pei, Erxi Liu, Songlin Wu