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At the SIA (French Automotive Engineers Society) Congress in Rouen, France this week, Delphi will be presenting information on its latest-generation direct fuel injection and control systems for diesel engines. Delphi produces both electromagnetic servo injectors and the more advanced piezo-electric injectors. For the latest editions of both systems, Delphi has bumped the maximum operating pressures from the 2,000 BAR level that has been used in the last few years up to 2,400 BAR (34,800 psi). T

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One of the keys to helping clean up diesel emissions and improving performance in recent years has been the piezo electric fuel injectors developed by companies like Bosch, Continental and Delphi. Previous injector designs used electro-magnetic solenoids to move the injector needle and feed fuel to the combustion chambers. In piezo injectors, a stack of piezo crystals expand when an electric current is applied. The piezo actuators respond more precisely and repeatably providing more accurate fue

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One of the keys to making the latest generation of diesel engines as clean and efficient as they are has been common rail injection systems and, more recently, piezo electric injectors. Continental Automotive Systems has just introduced a new type of piezo injector that may take diesels to the next level. Earlier injectors used electro-magnetic solenoids to move the injector needles allowing fuel to flow into the combustion chamber. Piezo injectors use a stack of piezo crystal plates that expand

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Siemens VDO has announced that for the first time an engine equipped with piezo direct injection gasoline (DIG) technology has featured in Ward's 10 Best Engine List of 2007. The 300 hp / 224 kW BMW 335i Twin Turbo 3-liter engine, which features Siemens VDO DIG technology, was unveiled at the Geneva Auto Show last year.

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