Honda Unveils Next-Generation Power Plant Technologies

Press Release

Honda Demonstrates the FCX Concept Vehicle

Honda Motor Co., Ltd. today held a demonstration drive of the next-generation FCX Concept fuel cell vehicle. The FCX Concept features a newly developed compact, high-efficiency Honda FC Stack as well as a low-floor, low-riding, short-nose body. It offers a comfortably large cabin and futuristic styling along with significant improvements in power output and environmental performance. Limited marketing of a totally new fuel cell vehicle based on this concept model is to begin in 2008 in and the

To meet Honda objectives for significant gains in both environmental and driving performance, the FCX Concept is equipped with a V Flow1 fuel cell platform consisting of a compact, high-efficiency fuel cell stack arranged in an innovative center-tunnel layout. This has allowed designers to create an elegant, low-riding, sedan form that would have been difficult to achieve in a conventional fuel cell vehicle. This new fuel cell stack is 20% smaller and 30% lighter than the current FCX FC Stack, yet its power output is 14kW greater. The drive motor has been positioned coaxially with the gearbox for a more compact design, with output increased by 15kW. Overall, the power plant is about 180kg lighter than that of the current FCX and about 40% smaller in volume. The result is improved energy efficiency and performance along with a more spacious interior.

While with previous fuel cell stacks the hydrogen and the water formed in electricity generation flowed horizontally, the new FCX Concept features vertical-flow design. This allows gravity to assist in discharging the water that is produced, resulting in a major improvement in water drainage, key to high-efficiency fuel stack performance. The result is stable power generation under a broad range of conditions, and higher output from a smaller package. Low-temperature startup has also been significantly improved, enabling cold-weather starts at temperatures 10?C lower than the current FCX— as low as minus 30?C.

1 V Flow indicates three features of the stack: Vertical gas flow (downward flow of hydrogen), Vertebral layout (center-tunnel layout), Volume-efficient (highly efficient packaging)

As an auxiliary power source, the FCX Concept carries a compact, high-efficiency lithium ion battery, contributing to increased power output and a more compact power plant. These efficiency improvements to major power plant components give the vehicle a travel range approximately 30% greater than the current FCX. The vehicle is also highly efficient, with an energy efficiency of around 60%—approximately three times that of a gasoline-engine vehicle, twice that of a hybrid vehicle, and 10% better than the current FCX.

Other features include seat upholstery and door linings made from Honda Bio Fabric, a plant-based material that offers outstanding durability and resistance to sunlight damage. Other improvements such as Shift-by-Wire and a newly designed instrument panel with easy-to-read display of hydrogen fuel consumption facilitate improved ease of operation.

The new fuel cell vehicle currently under development for release in 2008, will feature the principle technologies of the FCX Concept to achieve a new dimension in environmentally friendly driving pleasure not found with gasoline-engine vehicles.

Specifications

* When driven in LA4 mode (Honda calculations)

Honda Develops Flexible Fuel Vehicle (FFV) System

For Introduction in in 2006

Honda Motor Co., Ltd., today announced that it has developed a new flexible fuel vehicle (FFV) system that enables gasoline engine-based power plants to operate on either 100% ethanol or a wide range of ethanol-gasoline fuel mixtures.

Up to now, variations in the ratio of ethanol-to-gasoline have affected low-temperature startup performance, and caused variations in air-fuel ratio and engine output. This has made it a challenge to maintain stable dynamic performance, fuel economy and emissions levels. The new Honda system adapts to different ethanol-to-gasoline ratios by estimating the concentration of ethanol in the ethanol-gasoline mix in the fuel tank based on measurements of exhaust gas concentration in the vehicle's exhaust system. This provides the flexibility to adapt to ethanol-to-gasoline ratios of between 20% and 100%, while achieving outstanding fuel economy and dynamic performance on a par with a 100% gasoline-powered vehicle. In addition, a cold-start system utilizing a secondary fuel tank ensures reliable starts even at low ambient temperatures.

Bioethanol fuel, as used in and other countries, is made from plant sources such as sugar cane. Because plants absorb CO2 via photosynthesis, the amount of CO2 released into the atmosphere from burning bioethanol fuel does not increase atmospheric CO2. This makes bioethanol fuel an effective means to combat global warming as well as an alternative to petroleum.

In late 2006, Honda plans to begin sales of FFVs in , where bio-ethanol has gained in popularity.

Engine Specifications (Honda calculations)

1: 100% ethanol
2: 22% ethanol mixture