公开(公告)号：US11035099B2

公开(公告)日：2021-06-15

申请号：US16085402

申请日：2017-09-08

Applicant: Hitachi Construction Machinery Co., Ltd.

Inventor： Shota Kimura ,  Tadashi Osaka ,  Hidekazu Moriki ,  Kazuo Ishida ,  Noritaka Itou

IPC: E02F9/20 ,  E02F9/22

Abstract: A wheel loader includes a working device, a lift cylinder 152 which is a hydraulic actuator that drives the working device, a hydraulic pump 220 that supplies hydraulic oil to the lift cylinder 152, a lift cylinder bottom pressure detector 252 that detects a pressure of the lift cylinder 152, a control valve 221 that controls the amount of hydraulic oil to be supplied from the hydraulic pump 220 to the lift cylinder 152, a vehicle acceleration detector 254 that detects a vehicle acceleration in a longitudinal direction, and a control device 240. The control device 240 determines whether the working device has started excavation, or not, based on the lift cylinder bottom pressure detected by the lift cylinder bottom pressure detector 252 and the vehicle acceleration detected by the vehicle acceleration detector 254.