NBXs.org

In recent years, with innovative features of advanced transmission technology, competing contests, diversified, innovative automatic transmission technology into the development of the world auto industry a beautiful landscape.

AT Market

In the past 20 years, the global automotive automatic transmission AT technology, products, market continuously rapid development, despite its complex structure, large size, the quality too much weight, fuel consumption and higher, higher prices, maintenance costs, etc. subject to AMT , CVT, DCT and other more advanced automatic transmission a serious challenge, but its automatic shift transmission reliability and supple nature of the market are still to be widely recognized. In order to improve the inherent lack of AT, in particular to improve the fuel economy and comfort, AT gradually from 3-speed, 4-speed development to 5-speed. For each additional forward gear, it is reasonable size is bound to increase, the quality is bound to increase.

In 2001, the German company ZF introduced the first rear-wheel drive six-speed 6HP26-type AT, the first use of such bodies, 6HP26-type 6-speed AT model 5HP24 than the previous generation 5-speed AT decreased by 30% of the parts, quality and reduce by 12%, output of 600Nm torque, weighs only 85kg, size is also shorter than the previous 50mm, acceleration performance and fuel economy also have significantly improved. Since then, a subsidiary of Aisin AW Toyota, Nissan unit JATCO companies have launched a 6-speed AT. Mercedes-Benz Motor Company in 2003, is introduced seven-speed 7G-Tronic type AT. General Motors Corp. and Ford Motor Company unwilling to transmission technology, competition, decline, have to catch up, in 2003, an unprecedented collaboration and cooperation, joint development of 6-speed AT.

2006 Aisin AW introduced the world’s first eight-speed tiptronic smart electronic control AT ECT-i, 2007 Nian 5 Yue ZF announced that it has successfully developed a new 8-speed AT, plans to enter the market before 2008, claiming that the eight AT-speed fuel consumption and now use six-speed AT can reduce by 6% compared with the original 5-speed AT can be reduced by about 14% compared to.

1998 GM and Shanghai Automotive Group established a joint venture Shanghai General Motors Company, in Pudong production 4-speed AT; 1999 during Honda Automobile and Dongfeng Motor Corporation established a joint venture Dongfeng Honda Engine Co., Ltd. in Guangzhou, production of four-speed and 5-speed AT; 2004 Nian June ZF joint venture with Shanghai Automotive Group, established in Shanghai ZF transmission companies in the Shanghai Anting production 5HP-19-type 5-speed AT, and in 2006 started producing 6HP-type 6-speed AT; 2004 Nian 11, Japanese AISIN AW’s joint venture with China FAW Group Corporation, Tianjin, Ada automatic transmission, co-production six-speed AT; 2006 Nian 3 Yue Honda in China, Foshan, Nanhai, Guangdong Province, to establish wholly-owned Honda Auto Parts Manufacturing Co., Ltd., plans to produce 240,000 units automatic transmission, in 2006 with Ford’s Getrag close cooperative relationship with the establishment of Jiangxi Jiangling Motors Getrag transmission company, intends to produce cars with the MT and AMT.

However, to objectively pointed out, the new 6AT, 7AT, 8AT only in the high-end luxury car field emission display its advantages in the automotive market, becomes a mainstream medium and small-displacement cars, and in no use, in this area, the traditional AT rather gradually advanced CVT and DCT substitution trends.

CVT Market

Bosch Group in the Netherlands Van Doorne’s CVT transmission is a steel manufacturers and suppliers, as CVT transmission belt is one of the most important parts, so Van Doome company’s innovation in the push-type CVT belt, enjoy the patented technology to protect privileges, and a monopoly in the world. The company’s first seven-generation CVT strip has been to meet the power 200kW, torque 400Nm of power transmission.

The 20th century, the late ’80s, CVT success in Japan, and gradually, especially in JATCO company, formed a predecessor, post-drive, CVT-type spectra of different emissions, all this has energetically promoted the cause of the rapid development of CVT in Japan. At present, Japan’s Nissan, Mitsubishi, Toyota, Fuji Heavy Industries Ltd. and other auto manufacturers have the choice of models according to their own, and actively carry CVT transmission, equipped with Nissan’s JATCO company’s X-TRONIC CVT already qualified the maximum torque of 350Nm , and intends to further expand the carrying capacity.

JATCO company in 2007 in China, Guangzhou Science City, the establishment of a dedicated production of cars for the precursor of sole proprietorship with the strip-type CVT, the annual output of 14 million units, the sole proprietorship is scheduled in May 2007 was established in 2009 officially put into operation.

2007 Luk held in Shanghai Science and Technology Day, declared for the Au-di’s A8 sedan provided to carry a new continuously variable transmission torque of 450Nm has been developed and will be available the second half.

In recent years, has 80 years of experience in bearing industry, Japan’s JTEKT Corporation aware of the world’s major automobile manufacturers began to speed up the transformation from the traditional AT to the development trend of CVT to be involved in an efficient and low-noise tooth steel chain manufacturing competition. May 2007 JTEKT Corporation and the Netherlands toothed chain industry company (Dutch com-pany Gear Chain Industrial B.V., referred to as GCI) has signed a highly efficient CVT with a steel chain, an exclusive manufacturing license agreement, JTEKT company plans in 2008 on the market, and in 2012 annual sales of 100 billion yen.

According to reports, J-IC steel chain is capable of carrying large torque, with a metal strip has been twice as large than the torque capacity of today’s metal belt type CVT torque limit of approximately 400Nm, while the J-IC steel chain, the potential transfer Moment range was already twice the strip, allegedly, J-IC steel chain, the unique structure of steel chain, compared with today, you can significantly reduce the steel chain and sprocket meshing when the impact energy, reducing noise levels. Equipped with a J-IC steel CVT chain CVT can also be fuel-efficient than the existing 4% -5%, which will possibly cause the CVT more market appeal, so CVT range of applications in the vehicle to be even greater expansion. J-IC industry will wait and see the future of steel chain, the market performance.

DCT Market

European companies such as VW, ZF, GETRAG, Luk, Ricardo, Mag-neti Marrelli, GIF, etc. to cultivate mechanical automatic transmission than the North American, Japanese companies are more efforts, and has made remarkable achievements in recent years. Today in a variety of cars, the application of AMT, SMG, DCT (DSG) most, is the most successful European companies. Some European gearbox manufacturer issued a “double-clutch automatic transmission with DCT will be rapid development” of the notice.

According to a large number of experiments show that there are level with the conventional automatic transmission compared to wet DCT with AT compared to 15% increase in fuel efficiency, fuel-efficient DCT-dry wet DCT is even higher than 15%. Wet and dry clutch is the future of the most critical DCT technology, not only can effectively reduce fuel consumption, but also for the hybrid powertrain to build a good platform to further reduce fuel consumption. In addition, the hybrid application technology also helps to enter the fuel cell era, Getrag company is focus on developing hybrid variable speed drive technology and devices, recently announced a partnership with Bosch Getrag’s hybrid power systems in the DCT fields.

February 9, 2007, Getrag Corporation and Daimler – Chrysler Corporation signed a memorandum of understanding to be in North America by Getrag Corporation Daimler – Chrysler Corporation develops and manufactures DCT. Getrag company plans to expand in the global effort DCT market, is expected by 2015, Getrag’s DCT output will reach 2.4 million units or more, when the global DCT production of about 550 million units.

In June 2007 Volkswagen announced that the latest release of the DQ200-type 7-speed DCT, in order to improve efficiency and performance, using a pair of dry-type clutch to replace the original 6-speed dual-clutch wet, its compact size, the length of only 369mm, the quality of only 79kg, can be applied to a variety of models of vehicles. 7-speed DCT production is expected to be completed at the end of 2007.

United States BorgWarner (BorgWarn-er) is the world’s production and supply of DCT with a well-known technology and products company, is the main supporting DCT Volkswagen factory. China’s Shanghai Automotive Gear Factory will be the Borg Warner DualTronic products, the first five partners.

However, DCT development costs, and a huge investment in new plants, if there is not enough power, works on the DCT is not a very easy thing to do, while there are certain risks of changing market developments.

“Power to pass without interruption” and Ze-roShift AMT technology, electronically controlled automatic mechanical transmission AMT has already broken the “power transmission interrupted,” the fatal shortcomings, Ze-roShifit with single dry clutch, gear-shifting time to zero, the power to pass without interruption, this new technology in Europe, the birth of AMT, in the mechanical efficiency, fuel consumption, emissions targets, the degree of comfort, especially in the cost price declared superior to the current international market is the best-selling CVT and DCT, it is the CVT and the DCT launched a challenge. In August 2002 established ZeroShifi company in July 2003 -2005 year in January the development Zeroshift technology, in February 2005 completion of the first vehicle equipped with an automatic shift test, in September 2005 Zeroshift corporations, announced that its Zeroshift technology in the manual transmission shift based on the successful implementation of the time 0ms, smooth shifting automatic road test results and hit the industry.

This novel ZeroShift AMT advantages:

(1) shift during the time shift is zero, the power transfer without interruption;

(2) that the continued use of single dry clutch, you can significantly reduce product costs, reduce the transmission quality, and technically to ensure that the reduction of transmission of the energy loss within the organization, so that mechanical efficiency significantly improved;

(3) The transformation of the original manual transmission parts and components of the increase in most of the traditional components, manufacturing easily, Ze-roShift strength of the program is that it and the traditional manual transmission is very close to, but will be replaced by a synchronous ring gear part of the simultaneous dual-slider body.

(4) ZeroShift AMT technology, a wide range of applications, whether it is mini-cars, small displacement and large displacement of the passenger, or a variety of commercial vehicles, regardless of vehicle power, torque, size, as long as the original vehicle with manual transmission, can application and is compatible with.

Some automotive technology sector also think that, ZeroShifit market potential than any other emerging transmission transmission technology, because ZeroShift technology can be applied to all the various models, as well as can be offered to the world, already in use, the after-market catalog is still in the sales of various models. Projections, Zero rise ZeroShift emerging technologies should be fully rise to the Chinese automotive industry and the young automobile transmission industry concerns. In automatic transmission technology, the rapid development of a diversified today, China’s auto industry should strengthen cooperation with domestic and international transmission of the communication and exchange of product development for the Chinese automobile transmission direction and control, should be more wise, prudent, or more accurately, is.

Incoming search terms:

• cvt vs dsg (7)
• future development of dsg gearbox (3)
• cvt vs dsg transmission (2)
• chevron corporation (2)
• cvt dct efficiency comparison (2)
• cvt gm (2)
• vw dct maintenance (2)
• future trends in geared transmission (2)
• www future development of the gearbox (2)
• luk dct transmission (1)