« QuantumSphere Files Patent on Catalyst Device for Low-Cost, High-Efficiency Hydrogen Electrolysis | Main | UK Parliament Report Blasts Government’s Bioenergy Policies; Calls for 2nd-Gen Biofuels on Road and in Aviation »
Siemens VDO Debuts Piezo Diesel Technology for Light Commercial Vehicles
20 September 2006
|
| NOx/PM-trade-off improvement by 50% in an Audi V8 TDI engine equipped with piezo-actuated injectors. Click to enlarge. (cf. Bauder et al: MTZ 66 (2005) Nr.11) |
Siemens VDO is now offering piezo common-rail diesel injection systems for light commercial vehicles such as small delivery vans and US pick-ups with weights of up to 6 tons and engines with up to 6.5 liters of cylinder capacity. Use of piezo injection improves fuel economy and reduces emissions compared to solenoid injection technology.
The system for commercial vehicles is being shown for the first time at the IAA Commercial Vehicles 2006 show in Hanover, Germany.
In developing the commercial vehicle system, the company is drawing on its experience with piezo direct injection systems for diesel passenger cars. Alongside injectors, components include high-pressure pumps and control units. In addition, Siemens VDO offers numerous sensors and actuators that carry out operation and measurement tasks along the air and exhaust gas conduits.
High injection pressures, currently at more than 1,750 bar, atomize the fuel very finely, and the equally precise measurement of tiny and large amounts of fuel and rapid switching enable the injection profile to be adjusted exactly according to the engine’s operating status at the time.
Using flexible multiple injection, the stages of combustion can be shaped in the cylinder, optimizing the entire combustion process. Diesel engines with piezo common rail injection save up to 25% of the fuel used by four-cylinder, naturally aspirated, gasoline engines. Piezo common rail technology as part of the overall vehicle tuning can save up to 15% fuel consumption in comparison with conventional diesel engines, and makes it easier to meet emission standards.
High-performance piezo actuation in the control unit balances out production tolerances and environmental influences. The piezo driver can use the actuator’s characteristics for injector-selective actuation, as well as to compensate for mechanical and hydraulic deviations. Overall, piezo technology makes precise, economical and reliable injection systems possible.
Siemens VDO is designing future piezo systems for injection pressures of 2,000 bar and more. Additional technical progress and functions that have been expanded are aimed at achieving a higher level of thermodynamic efficiency and thus a higher torque per liter of cylinder capacity. Future generations of pumps will also achieve an even greater output pressure.
Siemens VDO began series-production of piezo direct injection for diesel engines in 2000. In 2005, Siemens was awarded the German Future Prize 2005 jointly with Robert Bosch GmbH for the development of piezo injection technology for use in diesel and gasoline engines. (Earlier post.)
About 4 million diesel passenger cars in Europe are equipped with piezo injection, and thus more than 16 million injectors are in operation.
Resources:
September 20, 2006 in Diesel, Emissions, Engines, Fuel Efficiency, Vehicle Systems | Permalink | Comments (5) | TrackBack (0)
TrackBack
TrackBack URL for this entry:
http://www.typepad.com/t/trackback/22062/6112288
Listed below are links to weblogs that reference Siemens VDO Debuts Piezo Diesel Technology for Light Commercial Vehicles:
Comments
I believe their numbers are off. Diesel engine does have about 25% better volumetric fuel consumption then gasoline, but fuel efficiency is better only by half of this number, since diesel fuel is denser then gasoline.
High pressure common rail fuel injection, especially piezo controlled, dramatically decreases diesel emissions, but fuel consumption improvement is closer to 5%, not 15.
Posted by: Andrey | Sep 20, 2006 11:33:25 PM
Andrey, their estimates are in line with what Bosch have reported. Here is more info about Piezo controlled high pressure common rail fuel injection:
http://www.wardsauto.com/about/WEU_sample.pdf#search=%22bosch%20claim%20%25%20better%20fuel%20efficiency%20piezo%20%22
Posted by: NT | Sep 21, 2006 5:09:58 AM
Chinahanji Parts plant: We are the OEM who has specialized in manufacturing of diesel fuel injection
system for quite a few years. Our parts include nozzle, elements & plunger, delivery valve, VE-pump and
so on. All products are in higher quality with competitive price.Our excellent quality has been performance in various kind of reputation brand-BOSCH, ZEXEL,DENSO, Delphi.Now we are producing the parts which used in the engine system of M35A2 and M60 tank, the type of the parts are HD90101A and HD8821, their most competitive price(almost one tenth of the product which made in USA) and the same quality will meet your need fairly.
Visit our website.
http://www.chinahanji.com & http://www.vepump.cn
Email:support@vepump.com
Email:nozzles@gmail.com
Tel:+86-594-3603380 Fax:+86-594-3600560
Posted by: chinahanji | Dec 21, 2006 4:24:21 PM
Puxing Fuel Pump Nozzle Plant is an exporter & manufacturer of diesel parts in china,we are specialize in manufacture a full range of engine diesel parts . we can offer our customers
high performance nozzle, plunger(element), delivery valve, head rotor . our parts can be available to
Japanese heavy duty vehicles like Comatsu, Kato, Isuzu, and America vehicles like Cat , Cummins and so on.
also, we can design the specifications exactly as you prefered and offer you the replacements for BOSCH,
DENSO, ZEXEL, CAT, etc. we now have good reputations among our clients from Australia, Greece, Sweden, Indonesia, South Africa,
and many Mid-east countries. we hereby sincerely hope to set up long-terms friend business relationship
with customers from all the world.
Puxing Fuel Pump Nozzle Plant
Contact Person: karen
TEL:86-594-2399300
FAX:86-594-6989700
ADD.:124#Puyang Road,Putian,Fujian,China 351100
Email:px_diesel@163.com
Posted by: karen | Mar 10, 2007 1:23:28 AM
I'm interested in developing a liquid LPG injection system possibly using your injectors.
Any further detailed information ,and price of your injectors would be apreciated.
Thanks Col
Posted by: Colin Vardy | May 9, 2007 10:43:52 PM
