Turbocompound unit
AssigneeVolvo Truck Corporation
InventorsPontus Eriksson, Kent Giselmo
Life of this patent
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Abstract
A turbocompound unit for converting energy of an exhaust gas from an internal combustion engine to torque increase of a crankshaft of the internal combustion engine includes a turbine arrangement and an arrangement configured to operatively connecting the turbine arrangement to the crankshaft is a hydrodynamic coupling and freewheeling arrangement. The turbocompound unit further includes a brake arrangement, wherein the brake arrangement and the freewheeling arrangement are located on an opposite side of the hydrodynamic coupling in relation to the turbine arrangement.
Claims26
A turbocompound unit for converting energy of an exhaust gas from an internal combustion engine to torque increase of a crankshaft of the internal combustion engine, comprising
- a turbine arrangement,
- means configured to operatively connecting the turbine arrangement to the crankshaft via a hydrodynamic coupling and freewheeling means,
- brake means, the brake means and the freewheeling means being located on an opposite side of the hydrodynamic coupling in relation to the turbine arrangement.
A turbocompound unit for converting energy of an exhaust gas from an internal combustion engine to torque increase of a crankshaft of the internal combustion engine, comprising
- a turbine arrangement,
- means configured to operatively connecting the turbine arrangement to the crankshaft via a hydrodynamic coupling,
- freewheeling means,
- brake means, and
- a controller having at least one input for receiving a signal representing the operational status of the turbocompound unit, wherein the input of the controller is configured to receive a signal representing the engine torque and the engine speed of the associated internal combustion engine, a determination unit being configured to determine a risk of oil leakage in the turbine arrangement being associated with the operational status and to determine a corresponding control signal, and at least one output for transmitting the control signal to the brake means and/or the freewheeling means for controlling the rotational speed of the turbine arrangement of the turbocompound unit.
A method for controlling the operation of a turbocompound unit configured to convert energy of an exhaust gas from an internal combustion engine to torque increase of a crankshaft of the internal combustion engine, the turbocompound unit comprising a turbine arrangement and means configured to operatively connecting the turbine arrangement to a crankshaft of the internal combustion engine via a hydrodynamic coupling, brake means, and freewheeling means, comprising:
- receiving a signal representing the operational status of the turbocompound unit by receiving a signal representing the engine torque and the engine speed of the associated internal combustion engine,
- determining a risk of oil leakage in the turbine arrangement being associated with the operational status,
- determining a corresponding control signal, and
- transmitting the control signal to the freewheeling means and/or to the brake means of the turbocompound unit for controlling the operation of the turbocompound unit by controlling the rotational speed of the turbine arrangement of the turbocompound unit.
Dependencies are inferred from the claim text.