Deere & Company

Greg R Long

Clayton P Neumann

Michael Andrew Holland

A work vehicle includes a plurality of vehicle drivetrain components, a plurality of state sensors and a variable flow conditioning hydraulic fluid source. A control manifold includes a plurality of control valves to control flow of conditioning hydraulic fluid to the plurality of drivetrain components to lubricate and cool the drivetrain components. A controller receives the state signals and is configured to selectively open one or more of the control valves at least in part in response to the one or more of the state signals to provide flow of conditioning hydraulic fluid to lubricate and cool any of the drivetrain components which are in an active operating state and to close one or more of the control valves to reduce or prevent flow of conditioning hydraulic fluid to any of the drivetrain components which are not in an active operating state.

Active lubrication strategy

A hydraulic system of a work vehicle includes a recirculation valve which may be closed during a warm-up mode of operation so that conditioning hydraulic fluid from a conditioning hydraulic fluid pump flows through a high pressure relief valve to a conditioning hydraulic fluid reservoir and recirculates from the conditioning hydraulic fluid reservoir back to the conditioning hydraulic fluid pump. Subsequent to the warm-up mode of operation, the recirculation valve may be opened so that conditioning hydraulic fluid from the conditioning hydraulic fluid pump flows through a low pressure relief valve to a main hydraulic fluid reservoir.

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Clay City, IN, United States of America

Greg R Long