METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE, DEVICE FOR THE OPEN-LOOP AND/OR CLOSED-LOOP CONTROL OF AN INTERNAL COMBUSTION ENGINE, INJECTION SYSTEM AND INTERNAL COMBUSTION ENGINE
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Abstract
A method for operating an internal combustion engine having a number of cylinders and an injection system having an injection system that has a common rail and a number of injectors associated with the cylinders, wherein an individual accumulator is associated with each injector and stores fuel from the common rail for the injector. The method has the following steps: starting the internal combustion engine, operating the internal combustion engine, shutting off the internal combustion engine. The following steps are also provided: a state indicating an engine standstill is detected, in particular after the internal combustion engine has been shut off, a high-pressure limit value is defined and a target high pressure is specified, a leakage is produced in the common rail without injection, the fuel pressure in the common rail is reduced to the defined high-pressure limit value below the target high pressure by way of the leakage.
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Citations
22 Claims
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1-11. -11. (canceled)
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12. A method for operating an internal combustion engine having a number of cylinders and an injection system comprising a common rail with a number of injectors associated with the cylinders and similar high-pressure components, in particular wherein a single reservoir that is embodied for holding fuel from the common rail for an injector is associated with the injector, the method comprising the steps of:
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starting the internal combustion engine; operating the internal combustion engine; stopping the internal combustion engine; detecting a state characterizing a stopped engine after stopping the internal combustion engine; determining a high pressure limit value and specifying a setpoint high pressure; producing a leak in the common rail without injection; and decreasing fuel pressure in the common rail to a specified high pressure limit value below the setpoint high pressure by way of the leak. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification