A method of operating a hydraulic hybrid powertrain

摘要

The invention relates to a method for operating a hydraulic hybrid drive train (1) which comprises an internal combustion engine drive (4) with an internal combustion engine (6) and a hydraulic drive (10) having a primary hydrostat that can be coupled to the internal combustion engine (6) via a planetary gearbox (20) (11) and a Sekundärhydrostaten (12), which can be driven hydraulically from a high-pressure accumulator (17). In order to improve the comfort and / or the performance when operating a hydraulic hybrid powertrain, in a sailing operation, a valve (41, 42) between the Primärhydrostaten (11) and the high-pressure accumulator (17) is closed.