|The third generation of the Bosch common-rail system, with CP4 high-pressure pump, piezo-inline injectors, and electronic control unit .Click to enlarge. Picture: Bosch|
The Bosch Group anticipates increasing sales of its common-rail diesel direct injection technology by nearly 18% to more than eight million systems in 2007, up from 6.8 million last year. Bosch alone has equipped more than 33 million passenger-car and commercial-vehicle engines with this technology since 1997.
Ten years ago, Bosch was the first company to put a common-rail system for passenger cars on the market. The first vehicles to feature the technology were the Alfa Romeo 156 JTD and the Mercedes-Benz 220 CDI.
In conjunction with turbocharging, the injection system has helped the diesel engine achieve a market breakthrough to approximately 50% of the new car market in western Europe. Ten years ago, diesel’s share was only 22%. The diesel engine’s main selling points are its reduced fuel consumption and lower CO2 emissions, combined with a much cleaner emissions profile than before.
Since the early 1990s, carbon monoxide, nitrogen oxide, and hydrocarbon emissions from new diesels have been reduced by 95% and more.
Our common-rail technology will play a major role in meeting the future Euro 5, Euro 6, and US07 Bin5 exhaust emission standards. As a result, the combination of common-rail technology and exhaust-gas treatment is securing the future of the diesel engine.—Dr. Ulrich Dohle, president of the Bosch Diesel Systems division
In 2006, Belgium had the highest percentage of diesel engines with a market share of 74%, followed by France (71%), Spain (68%), Portugal (65%), Austria (62%) and Italy (59%). In Germany, 44% of all new passenger cars had a diesel engine.
Bosch expects the market share of diesel-powered light-duty vehicles in the US to increase from its current level of approximately 6% to 15% in 2015. Bosch also expects rapid growth in Asia.
This year, Bosch plans to sell about 100,000 common-rail systems in both India and China. By 2013, it is likely that there will be some 1.3 million such systems in each of these countries. At present, just one-fifth of the company’s total production of high-pressure injection systems is for the markets in Asia and the Americas, but by 2015 this figure will be nearly 50%.
Bosch currently supplies common-rail systems with injection pressures of 1,350, 1,600, and 1,800 bar, using both solenoid-valve and piezo-valve technology. The next step—2,000-bar systems—goes into series production before the end of the year.
At the same time, Bosch is developing more cost-effective common-rail systems with an injection pressure of 1,100 to 1,450 bar for emerging markets such as India or China. They are primarily intended for the low-price vehicle segment, and will be launched at the end of 2007. For the middle market segment, Bosch is developing new systems in order to gradually reduce costs and fuel consumption.