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US 9,039,552 B2Granted
Secondary assembly drive of an internal combustion engine and method for operating same
AssigneeSchaeffler Technologies AG & Co. KG
InventorBernd Hartmann
Life of this patent
Estimating the term…
Abstract
A secondary assembly drive of an internal combustion engine and a method for operating same are provided. The secondary assembly drive includes, in two drive planes, an assembly drive (2) and a starter drive (12) and permits, in addition to a normal operating mode, the following operating modes: —starting of the internal combustion engine, —boosting of the internal combustion engine, —air-conditioning, and —deactivation of the assembly drive (2).
Claims10
Ancillary drive of an internal combustion engine, comprising two parallel drive planes and:
- a first crankshaft wheel that is adapted to be rotationally connected to a crankshaft of the internal combustion engine and is arranged in the first drive plane,
- a second crankshaft wheel that is adapted to be rotationally connected to the crankshaft and is arranged coaxial to the first crankshaft wheel in the second drive plane,
- an electric machine that is operable selectively as a generator (AL) or as a motor (M) with a machine shaft,
- a first machine shaft wheel that is rotationally connected to the machine shaft and is arranged in the first drive plane, in order to be driven by the crankshaft in a generator mode of the electric machine,
- a second machine shaft wheel that can be rotationally connected to the machine shaft and is arranged coaxial to the first machine shaft wheel in the second drive plane, in order to drive the crankshaft in a motor mode of the electric machine,
- an endlessly rotating first traction mechanism that wraps around the wheels arranged in the first drive plane,
- an endlessly rotating second traction mechanism that wraps around the wheels arranged in the second drive plane,
- a first coupling that is arranged in the first drive plane and allows the machine shaft to be taken over relative to the crankshaft,
- and a second coupling that is arranged in the second drive plane and allows the crankshaft to be taken over relative to the machine shaft,
- the second coupling is a freewheel coupling that is arranged, in terms of the drive, between the second crankshaft wheel and the crankshaft and allows the crankshaft to be taken over relative to the second crankshaft wheel.
7 more elements
Method for operating an ancillary drive of an internal combustion engine, comprising two parallel drive planes and:
- a first crankshaft wheel that is adapted to be rotationally connected to a crankshaft of the internal combustion engine and is arranged in the first drive plane,
- a second crankshaft wheel that is adapted to be rotationally connected to the crankshaft and is arranged coaxial to the first crankshaft wheel in the second drive plane,
- an electric machine that is operable selectively as a generator (AL) or as a motor (M) with a machine shaft,
- a first machine shaft wheel that is rotationally connected to the machine shaft and is arranged in the first drive plane, in order to be driven by the crankshaft in a generator mode of the electric machine,
- a second machine shaft wheel that is rotationally connected to the machine shaft and is arranged coaxial to the first machine shaft wheel in the second drive plane, in order to drive the crankshaft in a motor mode of the electric machine,
- an endlessly rotating first traction mechanism that wraps around the wheels arranged in the first drive plane,
- an endlessly rotating second traction mechanism that wraps around the wheels arranged in the second drive plane,
- a first coupling that is arranged in the drive sense between the first machine shaft wheel and the machine shaft and allows, in a rotational direction of the generator mode, the machine shaft to be taken over relative to the first machine shaft wheel,
- and a second coupling that is arranged in the drive sense between the second crankshaft wheel and the crankshaft and allows the crankshaft to be taken over relative to the second crankshaft wheel,
- wherein the following operating modes are provided:
- a start mode in which the electric machine is operated as a motor and drives the crankshaft until the internal combustion engine starts up,
- a normal operating mode in which the electric machine is operated as a generator and is driven by the crankshaft,
- and a boost mode in which the electric machine is operated as a motor and supports the driving of the crankshaft when the internal combustion engine is running.
10 more elements
Dependencies are inferred from the claim text.