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Solid Expansion of Energy Conserving Technology
Toyota positively implemented all energy saving
measures based on the scenario for CO2 reduction
created in FY2000.
Key measures taken to incorporate energy conserving technology developed by Toyota
included consolidation of production lines to reduce fixed energy consumption,
a shortening of processes in newly established lines, introduction of new technology
into existing equipment, miniaturization and addition of inverters to such equipment,
and thermal emissions recovery. Toyota also made efforts to reduce energy losses
on existing lines by reviewing the air blow system on existing lines or changing
to high-efficiency equipment, as well as optimizing the schedule for starting
and stopping equipment, etc.
Since FY2001, Toyota has been carrying out measures aimed at reducing power consumption
during non-operation of the lines and goals were set at all plants. After conducting
an operation status survey of equipment during non-operation of lines and clarifying
whether or not it was necessary to run equipment at such times, a "Turn off equipment" policy
was thoroughly implemented which resulted in a 5% decrease in power consumption
compared to the previous fiscal year.
Through these efforts, in FY2002 Toyota reduced CO2 emissions
to 1.61 million tons, achieving its goal. |
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•Energy Consumption at Toyota's Automobile
Production Process and CO2 Emissions per
Sales Unit
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•Component Ratio of Energy
Used during Automobile
Production
 See
details on
coefficients used to calculate
CO2 emissions volumes |
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Purchase of Green Power
In FY2000 Toyota concluded a
Green Power Certification System agreement with Japan Natural
Energy Company Limited. Based on this subcontracting agreement
Toyota has been purchasing and using 2 million kWh of wind-generated
power each year. In the future, Toyota plans to expand the use
of green power as a form of energy indispensable to the prevention
of global warming. |
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| Development of Low-Pressure Carburizing and Quenching Methods
Leads to Conservation of Energy in Heat Processing Furnaces |
Carburizing and quenching is a process
where carbon steel or low alloy steel is heated to about 950OC in
a carburizing/carbonitriding atmosphere to increase the amount of
carbon in the surface layer to approximately 1%, and then hardened
by quenching.
Conventional gas carburization was done at atmospheric pressure and
required a long heating time and large amounts of energy. The new
low-pressure carburizing and quenching method established in FY2002
reduces pressure in the furnace and alters the operating conditions,
thus accelerating the carburizing process and greatly shortening the
processing time. As a result, CO2 emissions have been reduced by approximately
60% compared to the conventional method, also reducing energy consumption. |
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•Comparison of Heating Time
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•Comparison of CO2 Emissions
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