Motor vehicle drive layout includes circuited medium pump joined upstream by line to retarder plus valved expansion tank with safety valve.

摘要

The operating medium for the hydrodynamic retarder (3) also acts as engine (1) coolant in a pump-fitted (2) circuit (8). A line leads between retarder working space and a connection point (8.5) circuited upstream of the pump (2) and the system includes a regulating valve (6.1) to regulate the internal pressure in the expansion tank (6). Connection point (8.5) is directly on the inlet and the system contains a valved leakage line (8.3). The expansion tank interior has its own safety valve (6.3).