Product Environmental Management（Eco-Products）
Improving Environmental Friendliness and Efficiency in Product Functions
In consideration of the environment, DENSO believes that an advanced automotive society firmly maintains a balance between caring for the environment and enjoying the full potential of the vehicle. To realize an advanced automotive society, DENSO seeks to enhance functions such as safety, maneuverability, comfort, and other aspects while working to reduce the environmental impact throughout a vehicle’s life.
Specifically, we: (1) develop products that contribute to enhanced fuel efficiency in vehicles, such as hybrid systems, engine management systems, and idling stop systems; and (2) develop products that contribute to enhanced fuel efficiency in harmony with social infrastructures, such as car navigation systems.
All DENSO products aim to create new value that provides enhanced comfort and convenience for customers while minimizing greenhouse gas emissions, resource consumption, and the risk of chemical substance pollution. This rationale is based on the approach to environmental efficiency recommended at the 1992 Earth Summit.
Product Development Techniques that Anticipate the Entire Life Cycle
Since 1995, DENSO has employed a product environmental management system that evaluates the environmental impact of a product in advance, during the planning and design stages, in order to minimize this impact.
At present, we ascertain the balance between product value and environmental impact using Factor Delta environmental factors and set targets for each product (Plan step). We then conduct a life cycle assessment (LCA) to determine environmental friendliness and impact at the design stage (Do step). The extent to which these targets are met is checked at a Quality Assurance Meeting, a milestone in the design process (Check step), and the results are reflected in the development of upcoming models (Act step).
Environmental impact during the automotive component lifecycle
Operation of Factor Delta
The multiplier at which environmental efficiency for evaluated products is increased relative to standard products is known as an “improvement factor.”
DENSO has collaborated with the Japan Auto Parts Industries Association (JAPIA) to develop a reasonable method for calculating this factor for automotive components, and these efforts have been summarized in the series of Guidelines for Environmental Factors for Products. Based on Japan’s Basic Environmental Law, these guidelines provide a means for calculating indices linked to product value in the form of positive factors and negative factors related to global warming, resource depletion, and emissions of environmentally hazardous substances throughout the automotive part life cycle.
In conjunction with the above indices, in fiscal 2011 we collaborated with JAPIA to formulate the JAPIA life cycle inventory *1 calculation guidelines and calculation rules in an effort to efficiently calculate the environmental burden during the manufacture and use stage in the extremely complex supply chain for the automotive parts industry. These activities have garnered high praise, receiving the Award of the Director-General of the Industrial Science and Technology Policy and Environment Bureau (METI) at the LCA Japan Forum *2 Awards in March 2018.
Calculation of Factor Delta indices
|Overview of key product and function||
Power control unit for hybrid automobiles
(Enhancement of environmental performance)
|Principal value improvement||
33% smaller than conventional units installed in the Toyota Prius due to cooling structure improvement and electric control circuit integration.
|Principal impact on environment||
Reduces switching loss and steady loss in insulated-gate bipolar transistor (IGBT) by approximately 20% compared with conventional units installed in the Toyota Prius