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US 2012/0055144 A1Published application
Method for operating a hydraulic hybrid vehicle
AssigneeRobert Bosch GmbH
InventorsVolker Pitzal, Udo Schulz
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AssigneeRobert Bosch GmbH
InventorsVolker Pitzal, Udo Schulz
Estimating the term…
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).
A method for operating a hydraulic hybrid vehicle (2) having a primary drive unit (5) and a hydraulic drive unit (6), which, to generate a positive or negative torque, is operated with a hydraulic medium which, in different operational states, is delivered from a hydropneumatic low-pressure accumulator (12) into a hydropneumatic high-pressure accumulator (11) with the aid of the hydraulic drive unit (6) or discharged from the hydropneumatic high-pressure accumulator (11) into the hydropneumatic low-pressure accumulator (12) in order to drive the hydraulic drive unit (6), characterized in that one or more first conditions in the hydropneumatic high-pressure accumulator (11) are detected in order to monitor the torque generated by the hydraulic drive unit (6).
Dependencies are inferred from the claim text.