HYDRODYNAMIC RETARDER DEVICE, METHOD FOR ITS USE AND VEHICLE

摘要

A hydrodynamic retarder device for installation in a power-train in a vehicle, wherein the retarder device comprises: a shovel-equipped stator which, together with a shovel-equipped rotor, forms a shovel system with a workspace for receipt of an aqueous working medium, and a retarder circuit connected to the workspace, to control the inflow of a working medium to the workspace, wherein the retarder circuit is installed to be connected to the vehicle's ordinary cooling water circuit. The retarder circuit comprises valve elements to shut off the flow of working medium to the workspace, and a negative pressure generator is connected in the retarder circuit, which negative pressure generator is installed to reduce the pressure in the workspace to or below the vapor pressure for the working medium, so that the workspace is thus evacuated of the liquid working medium.

主权项

1. A hydrodynamic retarder device, for connection and disconnection to a power-train in a vehicle, wherein the retarder device comprises:
at least one shovel-equipped stator, which, together with a shovel-equipped rotor, forms a shovel system with a workspace for receipt of an aqueous working medium; a retarder circuit connected to the workspace, in order to control the inflow of a working medium to the workspace, wherein the retarder circuit is arranged to be connected to the vehicle's ordinary coolant circuit, and comprises a draining valve device for forced evacuation of working medium from the workspace; a clutch device for connection and disconnection of said retarder device to/from said power-train; and a negative pressure generator connected in the retarder circuit, arranged to reduce the pressure in the workspace for receipt of liquid working medium evacuated from the workspace, in connection with initiation of the draining valve device.