55 Articles
Frankfurt Preview: Lotus develops a range extender engine

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 economica

Free piston engines could dramatically improve efficiency of ER-EVs

Over the last century and a half engineers and designers have created a wide array of different combustion engine designs. In spite of certain inherent advantages of some of these designs, the traditional four stroke reciprocating engine has continued to dominate the transportation space. Many of these alternatives have worked in principle but have never been adopted for several reasons. The most important reason is typically the problem of converting the chemical energy of combustion into rotat

Is Tesla Motors working with Daimler?

A few months back, Tesla Motors revealed that its upcoming WhiteStar sedan would be available in two variants, a pure battery electric like the Roadster and a range-extended electric more like the Chevy Volt. We still don't have many details on the car, although we do know that lessons learned while working on the drivetrain for the heavier sedan have been fed back into the Roadster for its updated 2.0 drivetrain.

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