Regenerative braking system for a work machine
First Claim
1. A regenerative braking system for a work machine, said work machine having a drive system for driving said work machine and a hydraulic system for operating said work machine, said hydraulic system powered by a main hydraulic pump, said regenerative braking system comprising:
- a ground driven hydraulic pump coupled to said drive system, said ground driven hydraulic pump being configured to absorb shaft power from said drive system by converting said shaft power into a hydraulic flow, and said ground driven hydraulic pump also being configured to provide said shaft power to said drive system by converting said hydraulic flow into said shaft power; and
a hydraulic circuit fluidly coupled to said ground driven hydraulic pump,wherein said hydraulic circuit is configured to selectively;
receive and store an energy from said drive system via said ground driven hydraulic pump;
transmit said energy back to said drive system via said ground driven hydraulic pump; and
direct said hydraulic flow from said ground driven hydraulic pump to said hydraulic system when an output of said main hydraulic pump drops below a desired level.
1 Assignment
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Accused Products
Abstract
A regenerative braking system for a work machine includes a ground driven hydraulic pump coupled to a drive system, the ground driven hydraulic pump being configured to absorb shaft power from the drive system by converting the shaft power into a hydraulic flow, and the ground driven hydraulic pump also being configured to provide shaft power to the drive system by converting hydraulic flow into shaft power. The regenerative braking system also includes a hydraulic circuit fluidly coupling the ground driven hydraulic pump. The hydraulic circuit is configured to selectively receive and store energy from the drive system via the ground driven hydraulic pump; transmit the energy back to the drive system via the ground driven hydraulic pump; and direct hydraulic flow from the ground driven hydraulic pump to a hydraulic system of the work machine when an output of the main hydraulic pump drops below a desired level.
11 Citations
24 Claims
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1. A regenerative braking system for a work machine, said work machine having a drive system for driving said work machine and a hydraulic system for operating said work machine, said hydraulic system powered by a main hydraulic pump, said regenerative braking system comprising:
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a ground driven hydraulic pump coupled to said drive system, said ground driven hydraulic pump being configured to absorb shaft power from said drive system by converting said shaft power into a hydraulic flow, and said ground driven hydraulic pump also being configured to provide said shaft power to said drive system by converting said hydraulic flow into said shaft power; and a hydraulic circuit fluidly coupled to said ground driven hydraulic pump, wherein said hydraulic circuit is configured to selectively; receive and store an energy from said drive system via said ground driven hydraulic pump; transmit said energy back to said drive system via said ground driven hydraulic pump; and direct said hydraulic flow from said ground driven hydraulic pump to said hydraulic system when an output of said main hydraulic pump drops below a desired level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A work machine, comprising:
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an engine; a drive system powered by said engine for driving said work machine; a main hydraulic pump powered by said engine; a hydraulic system for operating said work machine, said hydraulic system powered by said main hydraulic pump; and a regenerative braking system, said regenerative braking system including; a ground driven hydraulic pump coupled to said drive system, said ground driven hydraulic pump being configured to absorb shaft power from said drive system by converting said shaft power into a hydraulic flow, and said ground driven hydraulic pump also being configured to provide said shaft power to said drive system by converting said hydraulic flow into said shaft power; and a hydraulic circuit fluidly coupled to said ground driven hydraulic pump, wherein said hydraulic circuit is configured to selectively; receive and store an energy from said drive system via said ground driven hydraulic pump; transmit said energy back to said drive system via said ground driven hydraulic pump; and direct said hydraulic flow from said ground driven hydraulic pump to said hydraulic system when an output of said main hydraulic pump drops below a desired level. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification