Our patented Variable Valve Actuation technologies & Single cylinder research engines
SINGLE CYLINDER RESEARCH ENGINES
Together with our partner SwRI we have developed an advanced single cylinder engine architecture capable of running a wide range of engine sizes and configurations. Suitable for a number of development tasks, including combustion, cylinder head, valvetrain and piston development work, individual builds can be tailored to our customer’s unique needs. With our two base engines for both light and heavy duty applications we are able to cover engine bores from 65-145mm with cylinder pressure ratings of 200-300 Bar.
This is 2-step “discrete” mechanism for profile switching in engine valvetrains. Because the variability is achieved wholly within the camshaft, it is possible to switch between two valve opening events without adding to the valvetrain moving mass, with consequent speed, friction and packaging advantages. Functionalities are either:
- 2 valve lift settings
- Secondary valve opening
- Valve deactivation
The parts responsible for the profile switching are entirely contained within the camshaft. The system can be packaged with minimal changes to cylinder blocks or heads and does not add to the dynamic mass of the valvetrain. LATCHCAM is applicable to a multitude of valvetrain architectures including:
- Direct acting
- Rocker follower (either centre or end pivoted)
This is a fully variable mechanical Variable Valve Actuation (VVA) system with the unique advantage of providing full and seperate control of valve opening period and peak lift. The system is applicable to both rocker actuated and in line valvetrains.
The oscillatory motion of the cam is actuated, via a mechanical linkage, by a small eccentric and is therefore positively controlled in both directions, avoiding the need for a controlling return spring and allowing high rotating speeds. OSCAM is applicable to OHC gasoline and diesel cylinder head configurations, and to heavy duty truck valvetrain arrangements, including “skewed” systems.
In addition to being a production solution, OSCAM offers a robust and flexible system for research of valve timing and lift requirements for both gasoline and diesel engines and can be made available as a test bed development tool.