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AssigneeRobert Bosch GmbH
InventorsThomas Schuster, Ingolf Rupp, Andreas Roth
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The invention relates to an apparatus and a method for controlling and regulating an internal combustion engine 6; via a transducer disk 16 on the crankshaft 12 and a pickup 15, the annular position of the crankshaft 12 is ascertained continuously, with gasoline direct injection valves, in which the fuel injection valves 5 receive the fuel 1 from a pressure-imposing electric fuel pump 9 via a fuel rail 7. A control unit 25 evaluates the output signals of the pickup 15 to determine the annular position and to ascertain the rpm; depending on the annular position, the control unit 25 trips injection and/or ignition pulses. According to the invention, to detect the phase relationship of the engine 6, the pressure course in the fuel rail sensor 8 is evaluated. Upon blowback at compression counterpressure of fuel-air mixture into one of the injection valves in the event of an incorrect phase relationship offset by 360° KW, this leads to a significant pressure increase in the fuel rail sensor 8; the fuel rail sensor signal is delivered to the control unit 25, and as a result by means of the control unit a reverse synchronization by 360° KW of the ignition and injection is effected, and the affected fuel injection valve 5 into which the blowback takes place is immediately closed.
An apparatus for controlling or regulating an internal combustion engine having a camshaft (26) and a crankshaft (12), whose annular position is ascertained continuously by means of a pickup (15) and a transducer disk (16) with a reference marking (14), having fuel injection valves (5) which inject the fuel (1) directly into the combustion chambers, and the fuel injection valves (5) are delivered the fuel (1) via a fuel rail (7) by an electric fuel pump (9) acted upon by pressure, having a control unit (25) and the fuel (1) is delivered to the fuel injection valves (5) via a fuel rail (7) by an electric fuel pump (9) acted upon by pressure, having a control unit (25) which evaluates the output signals of the pickup (15) to determine the annular position and to determine the rpm, and the control unit (25) trips injection and/or ignition pulses as a function of the annular position, characterized in that for detecting the phase relationship of the engine (6), a pressure sensor (8) is provided, whose pressure signal has a characteristic course upon blowback at compression counterpressure of fuel-air mixture into one of the fuel injection valves (5) in the event of an incorrect phase relationship, offset by 360° KW, between the ignition and the injection, which leads to a significant increase in the pressure sensor signal, and the pressure sensor signal is delivered to the control unit (25) and by way of it a reverse synchronization by 360° KW of the ignition and injection is effected.
Dependencies are inferred from the claim text.