Method for operating an internal combustion engine, and motor vehicle
AssigneeDaimlerChrysler AG
InventorsFrank Duvinage, Matthias Klingebiel, Ruediger Pfaff, Helko Sass, Lothar Welte
Life of this patent
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Abstract
In a method for operating an internal combustion engine, and a motor vehicle to be heated by the engine coolant, wherein the internal combustion engine has a cooling circuit, a heating mode can be established in which operating parameters of the internal combustion engine, while satisfying required output set values, are set for the maximum possible introduction of heat into the coolant and the exhaust gas in order to reach or hold a desired coolant temperature.
Claims19
A method for operating an internal combustion engine which has a coolant circuit and exhaust gas re-circulation, during warm-up by switching engine operation from a normal mode to a heating mode for rapidly reaching or holding a desired coolant temperature, wherein operating parameters of the internal combustion engine, while satisfying required output values, are set for the maximum possible introduction of heat into the coolant and/or the exhaust gas, said method comprising the step of setting an exhaust-gas re-circulation rate in an exhaust-gas re-circulation device of the internal combustion engine to a maximum possible value while maintaining predetermined limit values.
A motor vehicle having an internal combustion engine and a heater installation for rapidly heating the interior of the vehicle, comprising means for monitoring variables which are characteristic of a heating state of the internal combustion engine and means for setting a heating mode of the internal combustion engine, in which operating parameters of the internal combustion engine, while satisfying required output set values, are set during a starting phase of the engine for a maximum possible introduction of heat into the coolant and the exhaust gas.
Dependencies are inferred from the claim text.