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VR-pulley
Intended for use with B-ISG and full Hybrid powertrains, IP has produced a new multi-mode crankshaft mounted VR-pulley technology. This largely passive device which packages within the standard pulley diameter provides all normal pulley functions including a crankshaft torsional damper. The VR-pulley gives the following functions and benefits.
applications
- B-ISG for gasoline and diesel passenger car engines
- B-ISG for heavy-duty engines
- Improved hybrid regenerative braking
- Simplification of hybrid powertrains through integrated electric ancillary mode
technology
- In normal operation the drive to the pulley is via a one-way mechanism, as with many conventional de-coupler alternator drives. By engaging a simple clutch with and low power solenoid, the drive is transmitted via an epicyclic mechanism containing only simple spur gears creating a ratio that can be tuned to suit specific applications.
- If the clutch is left open whilst the engine is stationary, the pulley is de-coupled from the crankshaft enabling the electrical machine to drive FEAD ancillaries through the belt.
benefits
- Up to 3.5 x reduced electrical machine torque requirement for engine cranking
- Major reduction in belt tension requirement
- De-coupler function to improve dynamics and prevent belt squeal
- Ancilliary drive mode enabling electrical machine to drive engine ancillaries e.g. A/C compressor, water pump, vac pump etc., whilst engine is stopped
- Re-optimised electrical machine can provide increased regeneration power in comparison to conventional B-ISG machines
references
1) VR-pulley introduction
2) Greencar congress -Click Here
3) Landrover Ultra Cost-Efficient Hybrid Powertrain - Click Here
latest news
Link to latest VR-pulley news item
To talk to us about your requirements click here
