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US 2020/0299923 A1Published application
Wheel loader and method for controlling wheel loader
AssigneeKomatsu Ltd.
InventorsRyota ENOMOTO, Masanori IKARI, Kentaro YAJIMA, Takuma NISHIMURA
Life of this patent
Estimating the term…
Abstract
A wheel loader includes a boom, a forward clutch, and a controller configured to control hydraulic pressure of hydraulic oil supplied to the forward clutch. The controller performs clutch hydraulic pressure control for bringing the forward clutch into a semi-engagement state by controlling the hydraulic pressure of the hydraulic oil supplied to the forward clutch on condition that the wheel loader advances while raising the boom in at least a loaded state.
Claims19
A wheel loader comprising:
- a boom;
- a forward or speed stage clutch;
- and
- a controller configured to control hydraulic pressure of hydraulic oil supplied to the clutch,
- wherein the controller performs clutch hydraulic pressure control in which the clutch is brought into a semi-engagement state by controlling the hydraulic pressure of the hydraulic oil supplied to the clutch on condition that the wheel loader advances while raising the boom in at least a loaded state.
2 more elements
A wheel loader comprising:
- a boom;
- a power train including a plurality of clutches;
- a controller configured to control hydraulic pressure of hydraulic oil supplied to each of the plurality of clutches of the power train;
- and
- a distance measuring sensor configured to measure a distance between the wheel loader and an approaching object,
- wherein the controller
- performs clutch hydraulic pressure control in which a predetermined clutch among the plurality of clutches is brought into a semi-engagement state by controlling the hydraulic pressure of the hydraulic oil supplied to the predetermined clutch on condition that the wheel loader advances and approaches the approaching object while raising the boom in at least a loaded state, and
- controls the hydraulic pressure of the hydraulic oil supplied to the predetermined clutch based on the distance measured by the distance measuring sensor in the clutch hydraulic pressure control.
5 more elements
A method for controlling a wheel loader, comprising the steps of:
- determining whether the wheel loader advances while raising a boom in a loaded state;
- and
- bringing a predetermined clutch included in a power train into a semi-engagement state by controlling hydraulic pressure of hydraulic oil supplied to the predetermined clutch when a determination is made that the wheel loader advances while raising the boom in the loaded state.
Dependencies are inferred from the claim text.