Implementation help to limit the CO2 emissions of global warming - "wire harness" challenges of aluminized ~

Since the industrial revolution, human through the burning of fossil fuels such as oil and coal to extract energy, to achieve the economic growth.It is said that now of carbon dioxide in the atmosphere (CO₂) concentration compared to before the industrial revolution, increased by about 40% above.With these CO₂Give priority to the increase of greenhouse gases from the "global warming", a serious environmental problems.The impact of global warming, such as abnormal climate and sea level rise, the destruction of the ecological system, impact on agriculture and fisheries, lead to a drop in food resources, etc., have appeared in many aspects.Can say global warming is the most important task to human.

In the face of such situation, the world has taken a substantive action, COP3 in 1997 (the United Nations framework convention on climate change (unfccc) third signatories meeting), in order to curb global warming, people signed let obligation of greenhouse gas emissions in the developed countries of the "Kyoto protocol".Although the international convention for the transformation of the industry has a huge role in promoting, but for the main fossil fuels for power car manufacturers and related products, CO₂Emissions has become a pressing issue.

In order to achieve the CO₂To reduce emissions, inhibition of auto industry began to push for energy consumption, and fuel for the realization of this goal.In addition to the ascension of the combustion efficiency of engine, car body of "lightweight" is indispensable, it has become the industry consensus.In such an environment, sumitomo electric group set out to previously with copper material production of vehicle transmission system "automotive wiring harness," replacement for lightweight materials, aluminum.This is a lightweight car body as the goal of wiring harness "aluminum" attempt.At the same time, this also is the social and global issues of CO₂To reduce emissions, and inhibit the challenges of global warming.

For auto makers, on the other hand, the biggest issue is how to deal with rising fuel prices.To solve the subject, lightweight car body, at the same time, vehicle parts should use aluminium - are discussed for a long time for this.The proportion of aluminum one-third for iron and copper, can be said to be overwhelmingly lightsome.Each at the same time the strength of the bulk density is higher than iron and processability as well, so people think it is the realization of transport equipment lightweight one of the most suitable material.In fact, such as radiators and air conditioning heat exchanger, and part of advanced car doors and body parts, such as aluminum using ratio increasing.At the same time, the auto makers began to focus on types.Like the engine and alternator, wiring harness to body weight will also bring huge load.Among them, the wire is copper pieces, so people expect the wire aluminized would greatly promote lightweight car body and fuel-efficient.However, aluminum, progress is not smooth.

Can say in a stalemate the wiring harness of aluminized this subject appear larger progress associated with the signing of the "Kyoto protocol" have a great deal.Affected by this sign, the European countries began to advance together CO₂To reduce emissions, the EU to CO₂Began to take control.Even do not participate in the "Kyoto protocol" in the United States, are headed by California state, began to advance CO₂Emissions control action.In such an environment, the auto industry began to accelerate aluminized subject of wiring harness is discussed in this paper.

On the other hand, it must be noted that copper prices, the market environment changes.Sharply expand China's copper demand which lead to the high prices, for auto makers, wiring harness of aluminized proposition became necessary to control costs.As a result, lightweight and low price for the realization of the goal of aluminium wire bundle, became the wiring harness manufacturer, led by sumitomo electric group, with the subject.Aluminum wire except for overhead transmission line, also used in car battery cable, the wire support large current, conductor cross-sectional area is larger.But the wiring harness multi-purpose conductor cross-sectional area is small, low pressure with aluminum wire.Other company's development by leaps and bounds, auto makers even claimed that "sumitomo electric already behind"."Out on the wire, sumitomo electric how can defeat 'self-esteem, we raised morale" of nagano (above).Each employee will condense together.

Accept the requirements of auto makers, the development of aluminium wire bundle in the autumn of 2006, official development is at the beginning of 2007.In development, from the beginning to sumitomo electric group "ALL" the appearance.Namely, sumitomo electric, sumitomo denso, automatic network institute of technology in three companies gather together.Wiring harness aluminized aspects of the subject is very clear.The implementation and the reliability of copper equivalent.Specifically, is to ensure that the strength of the aluminum wire itself (tensile strength) and electrical conductivity (= electrical conductivity liquidity index), the electrical connection in the wires and terminals, reliability and prevent being criticized for a long time of different kinds of metal corrosion caused by contact.

During the development of aluminium wires, a member of the sumitomo electric group -- toyama sumitomo electric also played a big role.The company is the production of various aluminum wire, especially in the area of aluminium, have rich experience in knowledge.In cooperation with the company, responsible for aluminium wire development work is automatic network technology institute otsuka is insured."Everyone has been clear about the development goal, began to work on the development of aluminum wire.The biggest issue is how to meet the requirements of strength and conductivity at the same time.Strength and conductivity in a reciprocal relationship, we need to even improve strength, also won't reduce the conductivity of aluminium alloy new ".