New Methodology of Life Cycle Assessment for Clean Energy Vehicle and New Car Model 2011-01-0851
Mazda announced that all customers who purchase Mazda cars are
provided with the joy of driving and excellent environmental and
safety performance under slogan of "Sustainable
Zoom-Zoom" long-term vision for technology development.
The purpose of this study is to develop a new approach of Life
Cycle Assessment (abbreviated to LCA) to be applied to clean energy
vehicles and new car models. The improvement of both environmental
performance, e.g., fuel consumption, exhaust emissions, vehicle
weight reduction, and LCA that is a useful methodology to assess
the environmental load of automobiles for their lifecycles has
become more important.
LCA by inventory analysis, for RX-8 Hydrogen RE as a rotary
engine vehicle used hydrogen as clean energy, was carried out and
disclosed the world for the first time. LCA for new Mazda 5 was
carried out as the portfolio of all models, previously only the
specific model equipped with fuel efficiency device based on
ISO14040. The majority of data on production of materials were
taken from GaBi4 database. The data on production of parts and
these assemblies were taken from in-house.
As a result, lifecycle environmental load of the RX-8 Hydrogen
RE depends on production methods of hydrogen fuel. The RX-8
Hydrogen RE using by-product hydrogen of caustic soda with least
environmental load was verified to reduce 57% of carbon dioxide
(abbreviated to CO₂) compared with the one using gasoline fuel. The
lifecycle environmental load of the new Mazda 5 depends on fuel
efficiency and emission gas purification. The new Mazda 5 was
verified to reduce 14% of CO₂ compared with the predecessor.
In this study, LCA of the RX-8 Hydrogen RE in the Japanese
market and of the new Mazda 5 in the European market were carried
out. Further studies for other markets are necessary as expansion
of these delivered markets.