Front End Motor-Generator System and Hybrid Electric Vehicle Operating Method
First Claim
1. An integrated switchable coupling of a hybrid electric arrangement for an internal combustion engine, comprising:
- an engine-side portion configured to be coupled for co-axial rotation to a rotatable shaft of the engine,a drive-side portion configured to be drive an engine accessory drive, to be selectively engaged with the engine-side portion, and to be driven by an electric motor at a front side of the drive-side portion opposite a rear side of the drive side portion facing the rotatable engine shaft, andan engagement actuator configured to selectively engage the drive portion with the engine-side portion,wherein the drive-side portion concentrically surrounds at least a portion of the clutch along a coupling rotation axis
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Accused Products
Abstract
A system and method are provided for hybrid electric internal combustion engine applications in which a motor-generator, a narrow switchable coupling and a torque transfer unit therebetween are arranged and positioned in the constrained environment at the front of an engine in applications such as commercial vehicles, off-road vehicles and stationary engine installations. The motor-generator is preferably positioned laterally offset from the switchable coupling, which is co-axially-arranged with the front end of the engine crankshaft. The switchable coupling is an integrated unit in which a crankshaft vibration damper, an engine accessory drive pulley and a disengageable clutch overlap such that the axial depth of the clutch-pulley-damper unit is nearly the same as a conventional belt drive pulley and engine damper. The front end motor-generator system includes an electrical energy store that receives electrical energy generated by the motor-generator when the coupling is engaged. When the coupling is disengaged, the motor-generator may drive the pulley portion of the clutch-pulley-damper to drive the engine accessories using energy returned from the energy store, independent of the engine crankshaft.
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Citations
18 Claims
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1. An integrated switchable coupling of a hybrid electric arrangement for an internal combustion engine, comprising:
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an engine-side portion configured to be coupled for co-axial rotation to a rotatable shaft of the engine, a drive-side portion configured to be drive an engine accessory drive, to be selectively engaged with the engine-side portion, and to be driven by an electric motor at a front side of the drive-side portion opposite a rear side of the drive side portion facing the rotatable engine shaft, and an engagement actuator configured to selectively engage the drive portion with the engine-side portion, wherein the drive-side portion concentrically surrounds at least a portion of the clutch along a coupling rotation axis - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification