Metier Technologies > Our Technologies

Valvetrain Technologies

DuoCam, DuoPhase and DuoPhase Link

The most cost effective and reliable solutions for cam phasing on single cam engines

DuoCam

Delivers the functionality of VVT on a single cam with low investment costs

Provides phasing of either intake or exhaust valves.

DuoPhase

Provides the functionality of DOHC with VVT on a single cam with low investment costs

Independent phasing of intake and exhaust valve timing.

DuoPhase Link

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 NO_X 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 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