lotus engineering
NEW HIGH SPEED AVT ™ SYSTEM ADVANCED HYDRAULIC VALVE ACTUATION UP TO 8,000 RPM
Legislation around the world requires combustion engines to operate cleaner, quieter and with lower emissions, whilst customers expect improved performance, economy and refinement. Developing engines to meet these requirements necessitates engine optimisation, research into combustion performance and new engine technologies. Traditionally, testing new camshaft profiles to change valve timing is expensive and time consuming as each new camshaft has to be designed, manufactured and installed each time.
THE LOTUS ACTIVE VALVE (AVT™) SYSTEM ADDRESSES THESE ISSUES... Lotus AVT is a fully variable hydraulically operated valve actuation system which empowers our clients with a tool for faster research and development of new engine technologies and combustion performance. The Lotus Active Valve Train system is renowned for its market leading accuracy and repeatability. It is already in use by leading OEMs in US, Europe and Japan. AVT eliminates the need to change hardware, dramatically speeding up development times and saving costs. AVT replaces the camshaft with a hydraulically operated valve system that can simulate an extensive, used definable range of valve lift profiles and timing from two to eight stroke combustion cycles in real time. Many hydraulic valve actuation systems have a trade off between speed and accuracy. The new Lotus system now operates up to 8,000 rpm whilst maintaining accuracy of results and quality of data for which AVT is renowned. The AVT system is scalable from single cylinder gasoline engines to heavy duty diesel engines.
Lotus can offer existing AVT users an upgrade path to the latest specification with minimal downtime. New clients are provided with a complete turnkey solution integrated with your existing research engine or with our own single cylinder engines.
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AVT™ is an industry proven advanced valve actuation research system SOLUTION Engine Efficiency and Fuel Consumption • Throttleless operation • Minimised charge exchange losses • Multi-stroke operation • Valve de-activation multi-lift • Stable running at lower idle speed due to less residual gas Torque and Power Curve • Optimised valve timing and lift • Simulate any advanced valvetrain system e.g. MultiAir Combustion Benefits • Swirl and tumble variation • Internal EGR control • CAI / HCCI Simulated Camshaft Design and Validation • Accurate back-to-back comparison • Reduced development cost and time FUNCTIONALITY • • • • • •
Four to eight valve actuators Can operate two cylinders simultaneously with correct configuration Thousands of valve lift profiles Each individual valve can be programmed with up to 128 separate lift profiles in a single test procedure Cycle to cycle valve lift variation Complete engineering support
To find out more information please contact our sales team on +44 (0)1953 608000, Email: eng-uk@lotuscars.com or visit our website lotuscars.com/engineering LIGHTWEIGHT ARCHITECTURES - EFFICIENT PERFORMANCE - ELECTRICAL AND ELECTRONIC INTEGRATION - DRIVING DYNAMICS
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7th Floor, New Jinqiao Tower No.28 New Jinqiao Road, Pudong, Shanghai. PR CHINA 201206
Phone: +44 (0)1953 608423 eng-uk@lotuscars.com
Phone: +1 734 995 2544 eng-usa@lotuscars.com
Phone: + 86 (21)5030 9990 eng-china@lotuscars.com