Komatsu Corporation

Koichiro Itow

Hikosaburo Hiraki

Jun Morinaga

Hiroaki Inoue

Noboru Kanayama

Hikosaburou Hiraki

Hideaki Saito

Ryuichi Shimada

Hiroaki Inoueo

A hybrid machine with a hydraulic drive device having hydraulic actuators allowed to operate against and by external loads is provided. To this end, the hybrid machine comprises hydraulic cylinders (), first hydraulic pumps (P) connected, with closed circuits, to head side pressure receiving chambers (S) and bottom side pressure receiving chambers (L) of the hydraulic cylinders (), and second hydraulic pumps (P) connected, with open circuits, to the bottom side pressure receiving chambers (L) and an external oil chamber (), wherein the first and second hydraulic pumps (P, P) are connected to electric motors (M) so as to be driven.

Hybrid machine with hydraulic drive device

An engine control device capable of improving engine efficiency by operating the engine in an area where fuel consumption is small (good) while allowing high responsivity of the engine to be maintained. The object can be achieved by operating to match at a point on a target torque line of a torque diagram and operating an electric motor when a matching point moves on the target torque line in a direction in which a load applied to the engine output shaft becomes large.

Engine control device

A cylinder driving system capable of reducing the number of hydraulic devices and the amount of energy loss and an energy regenerating method thereof are provided. To this end, the system includes i) a hydraulic cylinder, ii) a hydraulic pump having three suction/discharge ports of a first port for supplying oil to a bottom chamber of the hydraulic cylinder or draining oil from the bottom chamber, a second port for draining oil from a head chamber of the hydraulic cylinder or supplying oil to the head chamber, and a third port for draining oil from a tank or supplying oil to the tank, the suction rate or the discharge rate in the first port being the sum of the respective discharge rates or suction rates in the second port and the third port, and iii) a driving source for driving the hydraulic pump.

Cylinder driving system and energy regenerating method thereof

Power unit for generating discharge shock waves

Growing community of inventors

Tokyo, Japan

Koichiro Itow