METHOD FOR OPERATING A HYDRAULIC HYBRID VEHICLE
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United States of America Patent
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Issued Date -
Mar 8, 2012
app pub date -
Jan 19, 2010
filing date -
Mar 5, 2009
priority date (Note) -
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Abstract
The invention relates to a method for operating a hydraulic hybrid vehicle (2) having a primary (5) and a hydraulic (6) drive unit, which is operated with a hydraulic medium for creating a positive or negative torque, said medium being delivered in different operational states by means of the hydraulic drive unit (6) from a hydropneumatic low pressure accumulator (12) into a hydropneumatic high pressure accumulator (11) or is discharged from the hydropneumatic high pressure accumulator (11) into the hydropneumatic low pressure accumulator (12) for driving the hydraulic drive unit (6). In order to further increase the safety and/or the driving comfort during the operation of the hydraulic hybrid vehicle having a primary drive unit and a hydraulic drive unit, the pressure and/or the temperature or a change of the pressure and/or the temperature is detected in the hydropneumatic high pressure accumulator (11) in order to monitor the torque generated by the hydraulic drive unit (6).
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