DuoPhase Link - Twin Output Actuator Upgrade for DuoCam
Description
- A hydraulic actuator that directly phases a first set of cam lobes of a DuoCam. A “link” mechanism that phases a second set of cam lobes with a fixed characteristic to the first
- The phasing relationship can be tailored to best match the important load points across the engine operating range
Technical Benefits
- Reduced NOx emissions - via Warm Up (EEVO) and Keep Warm (LIVC) strategies.
- Reduced CO2 emissions - For exhaust thermal management (compared to a fuel post injection strategy)
- Miller cycle - retarding the cam lobe for just one intake valve of a cylinder pair to give effective variable duration
- Improved fuel economy
- Increased torque and power
General Application Benefits
- Integration - Retains Existing OHC / OHV architectures for simple implementation
- Reliable - Mechanical valvetrains that use known and well proven technologies
- Conventional valvetrain layout - Low design and manufacturing investment to integrate
- Low friction - conventional roller followers, no additional hydraulic pumping losses
- Simple Controls - same requirements as a conventional single hydraulic cam phaser system controlled by the engines ECU
- Continuously Variable - simple calibration. Direct positional feedback for simple, low cost OBD