Continental Automotive Gmbh

Continental Automotive France

Jerome Dileon

Philippe Serrecchia

Jean-Luc Fremaux

In a method of cleaning injectors of a direct-injection controlled-ignition engine, while idling, maximum fuel pressure to be injected for cleaning is calculated, by executing for at least one predetermined engine operating speed an iterative loop. During each loop the injected fuel pressure value increases and the injection time corresponding to the increased pressure is determined, selecting for each operating speed a cleaning pressure equal either to the maximum fuel pressure to which an injection time greater than the calibrated minimum injection time determined for the operating speed corresponds or to a maximum limit pressure corresponding to a given calibrated pressure for the engine/injectors system. Secondly, a cleaning treatment includes selecting an operating speed allowing the maximum cleaning pressure and controlling an engine operation by applying this speed and programming the cleaning pressure over a treatment duration exceeding the operating time allowed while running under operating conditions of this kind.

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Gudas, France

Jerome Dileon