Multiple pressure mode operation for hydraulic hybrid...

Details Multiple pressure mode operation for hydraulic hybrid... Multiple pressure mode operation for hydraulic hybrid...

2006-09-05

2006-09-05

Restifo, Jeff (Department: 3618)

Motor vehicles

With fluid or mechanical means to accumulate energy to power...

C180S306000, C180S307000, C180S308000

Reexamination Certificate

active

07100723

ABSTRACT:
A system for a hydraulically driven vehicle includes a pump producing fluid flow at an outlet, pump-motors having variable flow rates for driving the wheels, a hydraulic rail having a pressure and connecting the pump and the pump-motors, sensors producing signals representing rail pressure, pump-motor speed, pump-motor displacement, and a controller for determining a target hydraulic system parameter, determining, based at least in part on the flow rate of the pump-motor, rail pressure, and a flow rate produced by the engine-pump, a flow rate produced by the engine-pump that is required to produce the target system parameter, and adjusting an engine operating parameter of a cylinder-pump bank such that the demanded magnitude of the system parameter is produced.

REFERENCES:
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patent: 6971232 (2005-12-01), Singh
patent: 6971463 (2005-12-01), Shore et al.
patent: 2005/0016167 (2005-01-01), Singh

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