DuoCam - VVT on a Single Camshaft
Description
An assembled camshaft that enables the timing of one set of cam lobes to be moved relative to a second set of lobes.
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
- Delivers the functionality of VVT on a single cam with low investment costs
- 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 hydraulic cam phaser system controlled by the engines ECU
- Continuously Variable - simple calibration. Direct positional feedback for simple, low cost OBD
- Application – Suitable for a wide range of engines Passenger, commercial, off-highway vehicles, marine and power generators
- Compatible – Benefit with all fuel types, Gasoline, Diesel, Natural Gas (LNG), Ethanol, Methanol, Hydrogen and Synthetic Fuels