The design of the G2 allows for two variants, the first being a Battery Electric Vehicle (BEV) that is powered by a 38kWh battery pack designed and supplied by our partner K2 Energy. A pack of this size is calculated to give the vehicle a range of 100 miles under worst-case conditions. That is, the outside temperature is very cold and all auxiliary systems are running (windshield wipers, headlights, heaters etc).
The second version is a series Plug-in Hybrid Electric Vehicle (PHEV). This will have a smaller battery pack of 22kWh and will include a range extender. The range extender is a small, 3 cylinder, gasoline engine driving an electric generator. For long range driving the range extender can charge the batteries while driving. The range extender is designed by Lotus specifically for this purpose and is not used to directly drive the wheels.
The car weighs approximately 3500 pounds, has a drag coefficient (Cd) of 0.2 and will reach 60 mph in under 7.5 seconds. The Cd measure was made using Computational Fluid Dynamics (CFD) and will be confirmed using the University of Maryland’s wind tunnel. Initial crash simulations show excellent results and we believe a 5 star rating in final design is very feasible.
The G2 is designed to be easily maintained at the dealership level. Our plan is to provide necessary maintenance and repair support to highly trained repair personnel throughout the country via an interactive site.
A key feature of the design is a fully integrated thermal management system. The motor and inverter produce heat and have to be liquid cooled. The batteries need to be warmed above freezing before charging and they can get hot when stressed and need to be cooled. Passengers need to be heated or cooled for their comfort. All of these heat transfer demands have been accommodated in a single thermal management system designed by Dana Thermals.
All product planning and a considerable amount of concept work have been completed and the results are evident in our quarter scale models, simulated crash tests, aerodynamic results and CAD files. We are now entering the implementation phase of development. Tata Technologies will continue as our prime contractor with further subcontracting with our existing team members.
TECHNOLOGY + STYLE
Traditional vehicle design begins with styling. Much time and effort goes into creating a very specific appearance that creates an image to match the targeted buyer. Once the styling is complete, it is up to the engineers to fit all the necessary parts into the space available. Engines, drive train, suspensions etc must fit into a limited envelope.
This often causes compromises when it comes to optimizing any of those parts. That is why many cars don’t perform as well as they look. Genovation’s approach was to create the engineering model first and then wrap it in a stylish body. This approach had two major benefits; the technology fits together very simply and easily in such a modular fashion that upgrades to motors or batteries can be made easily as technology advances and also the frame is designed such that it can be restyled into a convertible or a four door with minimum effort.
Technology also played an important role in the vehicles coefficient of drag (Cd). The two major factors affecting the car’s performance are weight and Cd. Styling tweaks were made using computational fluid dynamics (CFD) analysis that resulted in a very low Cd of 0.2.
A SUSTAINABLE FUTURE
Sustainable materials are already available for use in cars, such as carpeting made from recycled, plastic, water bottles. Unfortunately, color consistency cannot be guaranteed and is therefore not acceptable to some large manufacturers. We consider this inconsistency to be a environmental badge of merit when we choose these materials. Expanding this thinking throughout the vehicle in terms of minimizing the use of petrochemicals in the vehicle is not difficult when making it a core objective.
We will apply such thinking to our manufacturing processes also and will maximize the use of solar and wind power in our factories. Our customers will be the people that enjoy not only the experience of driving our cars but also enjoy making a contribution to sustainability.