Shovel having an engine equipped with a supercharger
AssigneeSumitomo(S.H.I.) Construction Machinery Co., Ltd.
InventorKenji Morita
Life of this patent
Estimating the term…
Abstract
A shovel includes a boom cylinder that drives a boom and an arm cylinder that drives an arm. A hydraulic pump supplies operating oil to the boom cylinder and the arm cylinder. An engine is connected to the hydraulic pump and equipped with a supercharger. The engine is controlled to maintain a revolution speed within a certain definite range. A controller controls a rotating speed of the supercharger. The controller performs a process of increasing the rotating speed of the supercharger so as to increase a supercharging pressure generated by the supercharger before a hydraulic load is applied to the engine.
Claims11
A shovel comprising:
- a boom cylinder that drives a boom;
- an arm cylinder that drives an arm;
- a hydraulic pump that supplies operating oil to the boom cylinder and the arm cylinder;
- an engine connected to the hydraulic pump and equipped with a supercharger, the engine being controlled to maintain a revolution speed within a certain definite range;
- and
- a controller that controls a rotating speed of the supercharger,
- wherein the controller performs a process of increasing the rotating speed of the supercharger so as to increase a supercharging pressure generated by the supercharger before a hydraulic load is applied to the engine.
Dependencies are inferred from the claim text.