US 12,378,734 B2
Control method for road roller machine, and road roller machine
Hengning Tang, Yiyang (CN); Gan Jia, Yiyang (CN); and Xiangping Hu, Yiyang (CN)
Assigned to Hunan Sany Zhongyi Machinery Co., Ltd., Yiyang (CN)
Filed by Hunan Sany Zhongyi Machinery Co., Ltd., Yiyang (CN)
Filed on Feb. 24, 2022, as Appl. No. 17/679,473.
Application 17/679,473 is a continuation of application No. PCT/CN2021/100946, filed on Jun. 18, 2021.
Claims priority of application No. 202010596207.5 (CN), filed on Jun. 28, 2020.
Prior Publication US 2022/0275591 A1, Sep. 1, 2022
Int. Cl. E01C 19/28 (2006.01); B06B 1/18 (2006.01)
CPC E01C 19/286 (2013.01) [B06B 1/183 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A control method for a road roller machine, wherein the road roller machine comprises an engine, a driving pump, a vibration pump and a vibration assembly, the driving pump and the vibration pump are powered by the engine, the vibration pump is connected with the vibration assembly, and the control method comprises:
before starting the vibration pump, turning up, in response to a request of starting vibration, a revolving speed of the engine until the revolving speed exceeds a preset revolving speed range and turning down a displacement of the driving pump;
starting the vibration pump;
judging whether the vibration assembly has completed a vibration start; and
turning down, after the vibration assembly completes the vibration start, the revolving speed of the engine to be within the preset revolving speed range, turning up the displacement of the driving pump, and turning up a displacement of the vibration pump, wherein an adjustment amount of the revolving speed of the engine is inversely proportional to an adjustment amount of the displacement of the driving pump.