Vehicle with hydrostatic drive has retarder valve for hydraulically acquiring braking energy with connected pressure-limiting valve for choking output vol. flow of variable delivery pump

摘要

The vehicle has a variable hydraulic pump (3) and a hydraulic motor (4) in a closed circuit, an internal combustion engine (1) for driving the hydraulic pump and a variable delivery pump (2) for producing an output vol. flow in an open circuit contg. a retarder valve arrangement for hydraulically acquiring the braking energy. The retarder valve arrangement has a valve (10) and a connected pressure-limiting valve (11) for choking the output vol. flow of the variable delivery pump. An Independent claim is also included for a hydraulic controller.