The latest product of Lotus Engineering’s ongoing development work on alternative drivetrains is a new engine custom designed for use as a range extender in electric drive vehicles. The engineers at Lotus have developed an optimized architecture using a mono-block layout that combines the cylinder head, exhaust manifold and cylinder block into a single casting. Such an architecture allows for lower weight and reduced cost which is critical to making range extended EVs or series hybrids economically viable.
Because the engine in these applications is primarily designed to provide a flow of electricity to the motor and battery with the battery providing transient power needs, the range extender can be optimized for operation under certain specific conditions. That’s exactly what Lotus has done, setting up this engine to generate 20 or 47 hp at 1,500 rpm or 3,500 rpm. The engine only weighs 124 lbs and features a two valve per cylinder configuration with port fuel injection keeping the cost down. Lotus created this engine as part of the Limo-Green project it has been working on with Jaguar, MIRA and Caparo.
Frankfurt Preview: Lotus develops a range extender engine originally appeared on Autoblog Green on Tue, 08 Sep 2009 09:05:00 EST. Please see our terms for use of feeds.