Electrical machines with separately integrated starter ring gear and transmission coupler
AssigneeCummins Inc.
InventorPrashanth Visweswara Sastry
Life of this patent
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Abstract
Electric machine assemblies are disclosed. The electric machine assembly includes a stator, a rotor movably coupled with the stator, a starter ring gear component fixedly coupled with the rotor on a first side of the stator, and a transmission coupler fixedly coupled with the rotor on a second side of the stator opposite from the first side. Further disclosed are engine systems and methods of assembling the same, where the engine system includes an engine block with a crankshaft, as well as the electric machine assembly operatively coupled with the engine block such that the starter ring gear component is fixedly coupled with the crankshaft and the rotor on a first side of the stator.
Claims17
An electric machine assembly comprising:
- a stator;
- a rotor movably coupled with the stator;
- a starter ring gear component fixedly coupled with the rotor on a first side of the stator;
- a transmission coupler fixedly coupled with the rotor on a second side of the stator opposite from the first side;
- a first dynamic seal disposed between the starter ring gear component and the stator on the first side of the stator;
- and
- a second dynamic seal disposed between the transmission coupler and the stator on the second side of the stator, wherein each of the first dynamic seal and the second dynamic seal comprises:
- a first seal housing component attached to the rotor;
- a second seal housing component movably coupled with the first seal housing component;
- and
- a sealant disposed between the first seal housing component and the second seal housing component.
An electric machine assembly comprising:
- a stator;
- a rotor movably coupled with the stator;
- a starter ring gear component fixedly coupled with the rotor on a first side of the stator;
- a transmission coupler fixedly coupled with the rotor on a second side of the stator opposite from the first side;
- and
- a plurality of through bolts configured to couple the transmission coupler with the starter ring gear component,
- wherein each through bolt comprises:
- a first end fixedly coupled with the transmission coupler,
- a second end fixedly coupled with the starter ring gear component, and
- an intermediate portion therebetween extending through at least a portion of the rotor.
An electric machine assembly comprising:
- a stator;
- a rotor movably coupled with the stator;
- a starter ring gear component fixedly coupled with the rotor on a first side of the stator;
- a transmission coupler fixedly coupled with the rotor on a second side of the stator opposite from the first side;
- an assembly housing containing the starter ring gear component therein;
- and
- a restriction channel at least partially defined by the starter ring gear component and the assembly housing, the restriction channel configured to retain debris therewithin.
An electric machine assembly comprising:
- a stator;
- a rotor movably coupled with the stator;
- a starter ring gear component fixedly coupled with the rotor on a first side of the stator;
- and
- a transmission coupler fixedly coupled with the rotor on a second side of the stator opposite from the first side, wherein the transmission coupler is one of:
- a gearless flywheel or a flex plate.
An engine system comprising:
- an engine block comprising a crankshaft;
- a starter motor;
- and
- an electric machine assembly operatively coupled with the engine block, the electric machine assembly comprising:
- a stator;
- a rotor fixedly coupled with the crankshaft and movably coupled with the stator;
- a starter ring gear component fixedly coupled with the crankshaft and the rotor on a first side of the stator, wherein the starter motor is operatively coupled with the starter ring gear component;
- a transmission coupler fixedly coupled with the rotor on a second side of the stator opposite from the first side;
- and
- an assembly housing having a starter enclosure portion configured to receive therein the starter motor.
A method of assembling an engine system, the method comprising:
- attaching an electric machine assembly housing to an engine block;
- fixedly coupling a starter ring gear component with a crankshaft of the engine block;
- fixedly coupling a stator within the assembly housing;
- fixedly coupling a rotor with the starter ring gear component on a first side of the rotor and rotatably coupling the rotor with the stator;
- fixedly coupling a transmission coupler with the rotor on a second side of the rotor, the second side being opposite from the first side;
- disposing a first dynamic seal between the starter ring gear component and the stator on the first side of the stator;
- and
- disposing a second dynamic seal between the transmission coupler and the stator on the second side of the stator,
- wherein each of the first dynamic seal and the second dynamic seal comprises:
- a first seal housing component attached to the rotor;
- a second seal housing component movably coupled with the first seal housing component;
- and
- a sealant disposed between the first seal housing component and the second seal housing component.
Dependencies are inferred from the claim text.