Continued from Toyota Shows Off Long-drive-range FCV Concept (1)
As the mass around a wheel increases, so does the deformation of the tire. This time, Toyota developed a wheel in cooperation with Sumitomo Rubber Industries Ltd and employed an airless tire whose spoke is made of plastic. The tire does not need to be inflated.
By replacing the hollow rubber part with the spoke, the tire can reduce the deformation caused by the increase of mass, making it easier to control the IWM. The reduction of the heat loss caused by the deformation also contributes to reducing rolling resistance. Toyota has been developing the IWM to be combined with the tire for about 10 years.
Furthermore, the fuel-electricity conversion efficiency of the FC stack was improved.
"We improved the efficiency by 10-20%, compared with the Mirai," Toyota said.
The key is a catalyst technology. A team specialized in catalysts is developing it at the company.
Toyota designed the shape of the auto body so that it can reduce air resistance and realize a spacious interior space. With the design, which the company calls "diamond cabin," the space for the second row of seats is the largest. Whether the FCV is seen from a side or top view, the second row looks as if it is expanding. The large interior space enables seats to move widely.
The Fine-Comfort Ride has three rows of seats. Its riding capacity is six people. Its dimensions are 4,830 (L) x 1,950 x (W) x 1,650mm (H), and its wheelbase is 3,450mm. Compared with Toyota's "Noah" minivan, the FCV is 135mm longer, 255mm wider and 175mm lower.