Method for automatically controlling an internal combustion engine
AssigneeMTU Friendrichshafen GmbH
InventorArmin Dolker
Life of this patent
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Abstract
A method for automatically controlling an internal combustion engine, where, during normal operation in a first controller mode, a charge air temperature controller is set as dominant for a map-controlled thermostatic valve for automatically controlling the charge air temperature (TLL), or, during normal operation in a second controller mode, a coolant temperature limit controller is set as dominant for the map-controlled thermostatic valve for automatically controlling the coolant temperature (TKM). If a charge air temperature sensor fails, the second controller mode is set with the coolant temperature limit controller dominant, and if a coolant temperature sensor fails, the first controller mode is set with the charge air temperature controller dominant.
Claims7
A method for automatically controlling an internal combustion engine, comprising the steps of:
- setting, during normal operation in a first controller mode (RM1), a charge air temperature controller as dominant for a map-controlled thermostatic valve for automatically controlling charge air temperature (TLL), or, setting during normal operation in a second controller mode (RM2), a coolant temperature limit controller as dominant for the map-controlled thermostatic valve for automatically controlling coolant temperature (TKM);
- setting the second controller mode (RM2) with the coolant temperature limit controller dominant if a charge air temperature sensor fails;
- and
- setting the first controller mode (RM1) with the charge air temperature controller dominant if a coolant temperature sensor fails.
Dependencies are inferred from the claim text.