Patents by Inventor Zengzhi Zhao

Zengzhi Zhao 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).

  • FOUR-WHEEL STEERING CONTROL SYSTEM AND CONTROL METHOD THEREFOR
    Publication number: 20240367718
    Abstract: A The four-wheel steering control system includes a front drive axle, a front drive cylinder, a rear drive axle, a rear drive cylinder, a first reversing valve, a second reversing valve, and a switch valve. The front drive cylinder is drivingly connected to the front drive axle, and the rear drive cylinder is drivingly connected to the rear drive axle. A first working oil port of the first reversing valve communicates with one oil chamber of the front drive cylinder. A second working oil port of the first reversing valve communicates with an oil inlet of the second reversing valve. An oil return port of the second reversing valve communicates with another oil chamber of the front drive cylinder. Two working oil ports of the second reversing valve communicate with two oil chambers of the rear drive cylinder one to one.
    Type: Application
    Filed: November 29, 2022
    Publication date: November 7, 2024
    Inventors: Zhaolliang Zhang, Shaolei Li, Dehong Wang, Desen Xue, Zengzhi Zhao, Xiaofei Deng, Bing Guo