Method for controlling and regulating an internal combustion engine
AssigneeMTU Friedrichshafen GmbH
InventorArmin Dölker
Life of this patent
Estimating the term…
Abstract
Proposed is a method for controlling and regulating an internal combustion engine (1) having a common rail system and having a passive pressure limiting valve (11) for discharging fuel out of a rail (6) into the fuel tank (2), in which method, in a first stage, the pressure limiting valve (11) is set as open when the rail pressure, proceeding from a steady-state rail pressure, exceeds a first threshold value and subsequently falls below a second threshold value within a first critical time, wherein the first threshold value characterizes a higher pressure level than the steady-state rail pressure and the second threshold value characterizes a lower pressure level than the first threshold value, and in which method the opening duration of the opened pressure limiting valve (11) is monitored.
Claims17
Method for controlling and regulating an internal combustion engine having a common rail system and having a passive pressure limiting valve for discharging fuel out of a rail into the fuel tank, in which method in a first stage, the pressure limiting valve is then set as open if, within a first critical time, proceeding from a steady-state rail pressure, the rail pressure exceeds a first threshold value and subsequently falls below a second threshold value, wherein the first threshold value characterizes a higher pressure level than the steady-state rail pressure, and the second threshold value characterizes a lower pressure level than the first threshold value, and in which method the opening duration of the pressure limiting valve is monitored.
A method of controlling an internal combustion engine having a common rail system and having a passive pressure limiting valve for discharging fuel out of a rail into the fuel tank, the method comprising:
- setting the pressure limiting valve as open if, within a first time period, the rail pressure increases from a steady-state rail pressure and exceeds a first threshold value, and subsequently falls below a second threshold value, wherein the second threshold value is a lower pressure level than the first threshold value, and
- monitoring an opening duration of the pressure limiting valve.
Dependencies are inferred from the claim text.