Method and device for diagnosing an injection valve, connected to a fuel rail, of an internal combustion engine
A fuel distribution pipe and injection valve technology, which is applied in fuel injection control, mechanical equipment, engine control, etc., can solve problems such as changes in injection valves that are not considered, and achieve the effect of reducing uneven operation and reducing emissions
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[0065] exist figure 1 The high-pressure fuel system shown in has a high-pressure fuel pump 1 . A flow control valve 2 is connected to the high-pressure pump 1 , and the flow control valve 2 delivers fuel provided by the high-pressure fuel pump 1 to a fuel distribution pipe 4 via an input line 3 . A plurality of injectors 5 is connected to the fuel distribution line 4 . In order to supply fuel to the injectors 5 , each injector 5 has an injector feed line 6 connected to the fuel distribution line 4 . Furthermore, a pressure sensor 7 , in the illustrated exemplary embodiment a high pressure sensor 7 , is shown as the pressure measuring device. The fuel pressure in fuel rail 4 can be measured with this pressure sensor 7 . A control unit (ECU), not shown in detail, is provided for actuating injection valve 5 and for controlling other variables of the high-pressure fuel system.
[0066] The control device is provided for shutting off the fuel supply to the fuel rail 4 via the f...
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