Designing cars for low-carbon chic

By Simon Marks
Published: July 6, 2008

PARIS: As governments seek to cut carbon emissions through regulation and consumers react to rising fuel prices, automakers and designers are mapping out a new generation of lighter, sleeker vehicles that could give a radical new look to urban streets.
Toyota has already set a benchmark for low emissions and fuel economy. Its Prius model, introduced in 2000, pioneered new technologies, including the first fully integrated hybrid engine, able to switch between gasoline and battery power, and electronic and computerized controls replacing heavy hydraulic systems.
Toyota has been followed by another Japanese company, Honda, with a Civic hybrid, and a string of releases or planned models from European and U.S. competitors. Carmakers are now racing to design more innovative bodies incorporating advanced aerodynamics and light, biodegradable plastic components. They are also trying to second-guess the kind of styling that the next generation of car buyers will want.
Gilles Vidal, designer of a recent "green" concept car, the C-Cactus, for the French automaker PSA Peugeot Citroën, said, "To make a real environmental effort, you need to work on all of the possible factors - materials, optimization of processes, simplifying, going back to essentials."
Students at Créapôle, a leading industry-sponsored design school in Paris, are among those working with manufacturers to develop new designs and technologies that could become auto industry standards.

Alec Moran, a final-year master's student at the school, said that instead of selling cars based on the size of the engine, the car's relationship with its surroundings and how it interacts with people should be increasingly important.
"We are trying to develop the aesthetic element of the shape and interior comfort while assimilating the car's essence to the cultural needs of a particular social group," he said.
The evolution in fuel economy is continuing. For example, Ford fitted its EcoBoost engine this year to the new Lincoln MKS and Ford Flex models. The motor combines direct injection for higher fuel efficiency with additional turbo-charged power generated by using waste exhaust gas energy.
Guy Negre, a motor engineer and founder of MDI Enterprises, a company that studies new technologies and production concepts to reduce the environmental impact of carbon dioxide, invented a compressed-air engine in 1996. The engine emits one-third the carbon dioxide of conventional motors of the same size. Cold air, compressed in tanks to 300 times atmospheric pressure, is heated and fed into the cylinders of a piston engine. No combustion takes place, meaning there is no pollution, although the energy needed to compress the air may still come from polluting oil- or coal-burning power stations.
"Obviously, we are obliged to make changes to the design in relation to the requirements and specifics of new technologies," Negre said. "The weight, for example, is extremely important for many reasons. The heavier a vehicle is, the more energy is needed to power it and the more it pollutes."
Negre's engine will be offered as an option in Tata Motor's new production model, the Nano, next year. The Nano, a minicar with an ultralow price tag, was introduced in January and is primarily aimed at the Indian market. Negre said a full tank of compressed air would cost about $3 and provide about 200 kilometers, or 125 miles, of driving. The tank could be filled by gas station compressors used for inflating tires, or a built-in compressor powered by plugging in to an electrical outlet, he said.
Designers at automakers like Chrysler, Toyota and Citroën are already adapting to changing customer needs and perceptions. The Citroën C-Cactus, a retro take on the legendary 2CV, is designed for a post-SUV urban world where small is beautiful and low environmental impact is a top priority.
Maria Mack, a senior design specialist in Brussels for Toyota, said, "From the very first stage of design, the project leader responsible for a particular vehicle sets environmental impact reduction targets."
The C-Cactus is an example of how manufacturers are experimenting to reduce the industry's total carbon footprint, including production and driving emissions. Besides choosing a hybrid engine, Vidal, its designer, said he halved the weight of the car and simplified everything that could be simplified to cut energy consumption.
Olivier Frémont, head of Créapôle's department of transport design, said: "Four or five years ago much of our design work was focused on the Chinese and emerging markets. But in the last three years or so trends have radically changed as designers have become much more ecologically minded."
He added, "We are regularly looking to simplify the vehicle whether it be outside or inside," and he said that "we are coming back to basic questions of what is actually useful inside the vehicle, what we actually need."
Moran, the Créapôle student, has designed a car that addresses two main issues: the escalation of oil prices and the need to minimize environmental impacts. His car runs on an electric motor using a lithium-ion battery, substantially lighter than traditional lead-acid batteries. It has a chassis made of bamboo, reinforced with spiders' silk and plant resin.
Car companies like Mazda are looking to bioplastics for the fenders and dashboards of future models. Mazda says that the plastic will be made from cellulosic biomass produced from inedible vegetation like plant waste and wood shavings. Toyota's concept car, the COMS BP, an electric vehicle, also uses bioplastics for some of its body parts, including the hood, pillars and roof.
Moran said his car was designed for people he likes to call "No-Nos" - those who reject mainstream consumerism and popular advertising.
"'No-Nos' are a growing minority of people who care a great deal about their carbon footprint," Moran said. "Aesthetically conventional but technically advanced," he said, his target buyers would be "activist consumers who are both thoughtful and introspective."
Cyril Randuineau, another master's student at the school, spent some time at Toyota's main design center in Tokyo, where he studied cultural trends and noticed that many Japanese people had small garages and tended to travel in groups.
His response was to design a car with a miniaturized hybrid engine to maximize passenger space within a small frame, and a molded cocoonlike interior where driver and passengers could relax in comfort when stationary.
He has also designed a car for an emerging African market that he hopes will take off in the future. He says that rising oil prices will open up the market for exciting new technologies using electricity and solar power, all of which will change the shape and functions of the car.
"It's uncertain that this type of car would actually have mass appeal," said Moran. "The aim of this project is really to throw the idea out there."