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US 12,472,661 B2Granted
Mixer drum drive with additional pump
AssigneeOshkosh Corporation
InventorsBryan Datema, David Ilgert, Robert Varao, Yanming Hou
Life of this patent
Estimating the term…
Abstract
A vehicle includes an engine, an electric energy system, a drum configured to mix drum contents received therein, and a drum drive system coupled to the drum and the engine. The drum drive system includes a primary pump, an electric motor powered by the electric energy system, an auxiliary pump fluidly coupled to the mechanical pump and powered by the electric motor, and a drum motor fluidly coupled to the primary pump and the auxiliary pump and positioned to drive the drum to agitate the drum contents.
Claims19
A vehicle, comprising:
- an engine;
- an electric energy system;
- a drum configured to mix drum contents received therein;
- a drum drive system coupled to the drum and the engine, the drum drive system including:
- a primary pump mechanically coupled to the engine;
- an electric motor powered by the electric energy system;
- an auxiliary pump fluidly coupled to the primary pump and powered by the electric motor, the auxiliary pump being a variable displacement pump, the electric motor and the auxiliary pump forming part of an accessory power unit that is removably coupled to the vehicle, the accessory power unit further comprising a housing that is configured to enclose the electric motor and the auxiliary pump;
- and
- a drum motor fluidly coupled to the primary pump and the auxiliary pump and positioned to drive the drum to agitate the drum contents;
- and
- a control system communicably coupled to the drum drive system, the control system configured to:
- activate the electric motor based on an operating status of the vehicle;
- and
- control a displacement of the auxiliary pump to satisfy a target rotational speed of the drum without increasing an operating speed of the electric motor.
11 more elements
A vehicle, comprising:
- an engine;
- an electric energy system;
- a drum configured to mix drum contents received therein;
- a drum drive system coupled to the drum and the engine, the drum drive system including:
- a primary pump mechanically coupled to the engine;
- an electric motor powered by the electric energy system;
- an auxiliary pump fluidly coupled to the primary pump and powered by the electric motor, the auxiliary pump being a variable displacement pump;
- and
- a drum motor fluidly coupled to the primary pump and the auxiliary pump and positioned to drive the drum to agitate the drum contents;
- and
- a control system communicably coupled to the drum drive system and the engine, the control system configured to:
- activate the electric motor based on an operating status of the vehicle;
- control a displacement of the auxiliary pump to satisfy a target rotational speed of the drum without increasing an operating speed of the electric motor, and
- when the primary pump is operating, control the displacement of the auxiliary pump to satisfy the target rotational speed of the drum without increasing the operating speed of both the electric motor and the engine.
11 more elements
Dependencies are inferred from the claim text.