US 12,221,767 B2
Travel stability system, backhoe loader and control method
Bin Zhao, Suzhou (CN); Zhanwen Zhang, Suzhou (CN); Yanbo Geng, Suzhou (CN); and Baoxiang Lang, Suzhou (CN)
Assigned to JIANGSU XCMG CONSTRUCTION MACHINERY RESEARCH INSTITUTE LTD., Jiangsu (CN)
Appl. No. 17/761,758
Filed by JIANGSU XCMG CONSTRUCTION MACHINERY RESEARCH INSTITUTE LTD., Suzhou (CN)
PCT Filed May 27, 2020, PCT No. PCT/CN2020/092471
§ 371(c)(1), (2) Date Mar. 18, 2022,
PCT Pub. No. WO2021/232455, PCT Pub. Date Nov. 25, 2021.
Claims priority of application No. 202010425641.7 (CN), filed on May 19, 2020.
Prior Publication US 2023/0349130 A1, Nov. 2, 2023
Int. Cl. E02F 9/22 (2006.01); E02F 9/26 (2006.01)
CPC E02F 9/2217 (2013.01) [E02F 9/2207 (2013.01); E02F 9/2228 (2013.01); E02F 9/262 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A travel stability system, comprising:
a hydraulic actuator;
a first hydraulic oil source, operatively connected with the hydraulic actuator, and configured to provide pressure oil to the hydraulic actuator;
an energy storage element, operatively connected with a first oil supply path between the first hydraulic oil source and the hydraulic actuator;
a controller, configured to compare an oil pressure of the hydraulic actuator with an oil pressure of the energy storage element after the travel stability system is turned on, and achieve a balance between the oil pressure of the energy storage element and the oil pressure of the hydraulic actuator before the energy storage element is accessed to the first oil supply path;
a second hydraulic oil source, operatively connected with the energy storage element, and configured to supply pressure oil to the energy storage element through a second oil supply path so as to raise the oil pressure of the energy storage element; and
an oil drainage element, operatively connected with the energy storage element, and configured to unload the energy storage element through an oil drainage path so as to reduce the oil pressure of the energy storage element.