Method for operating a serial hydraulic hybrid drive system
AssigneeRobert Bosch GmbH
InventorRichard Bauer
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Abstract
The invention relates to a method for operating a preferably serial hydraulic hybrid drive system (1), comprising an internal combustion engine (8), a first expulsion machine (11), a second expulsion machine (12), a pressure accumulator (20) and an isolating valve device (30). For the purpose of optimization it is proposed that for various operating modes in each case a total efficiency level is read out from characteristic maps. These total efficiency levels are compared with one another. The operating mode with the best total efficiency level is subsequently selected.
Claims19
A method for the operation of a hydraulic hybrid drive system (1), comprising an internal combustion engine (8), a first displacement machine (11), a second displacement machine (12), a pressure reservoir (20) and a decoupling valve device (30), characterized in that for a specified load point (PRad) an overall efficiency of the hybrid drive system (1) for all possible operating modes is read out from corresponding overall efficiency characteristic fields, the overall efficiencies of all possible operating modes that are read out are compared with each other and the hybrid drive system (1) is operated in the operating mode having the best overall efficiency.
Dependencies are inferred from the claim text.