Method for controlling an internal combustion engine
AssigneeContinental Automotive GmbH
InventorGerhard Haft
Life of this patent
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Abstract
The invention relates to a method for controlling an internal combustion engine with a motor control system that adjusts the exhaust-gas temperature by influencing the air-fuel mixture. Said motor control system has a temperature model so as to determine a preset temperature for a component in the exhaust manifold, which is achieved after a longer period of time while maintaining current operating and driving conditions. The motor control system regulates the exhaust-gas temperature depending on the preset temperature for the purpose of component protection.
Claims14
A method for controlling an internal combustion engine having a motor control system, comprising:
- adjusting an air-fuel mixture of the engine according to a temperature model of the control system to influence an exhaust gas temperature;
- determining a preset temperature for a component in an exhaust gas manifold of the engine, the preset temperature representing the temperature that would be achieved if the current operating condition and a current driving condition were maintained for a long time;
- regulating the exhaust gas temperature by adjusting the air-fuel mixture as a function of the preset temperature and a maximum permissible temperature value of the component after a current temperature value of the component has exceeded a switching-on threshold value for the purpose of component protection;
- and
- adjusting the preset temperature based on the air-fuel mixture adjustment;
- and
- further regulating the exhaust gas temperature by adjusting the air-fuel mixture as a function of the adjusted preset temperature and the maximum permissible temperature value of the component.
An internal combustion engine, comprising:
- an engine block having a cylinder and plurality of bearing supports for a rotating shaft;
- a crank shaft supported by the bearing supports;
- a piston arranged in the cylinder and connected to the crank shaft;
- a cylinder head arranged on the block opposite the bearing supports for the shaft;
- an exhaust manifold connected to the cylinder head;
- a component arranged in the exhaust gas manifold;
- and
- a control system that regulates engine operation, wherein the control system:
- adjusts an air-fuel mixture of the engine according to a temperature model of the control system to influence an exhaust gas temperature;
- determines a preset temperature for a component in the exhaust gas manifold, the preset temperature representing the temperature that would be achieved if the current operating condition and a current driving condition were maintained for a long time;
- regulates the exhaust gas temperature by adjusting the air-fuel mixture as a function of the preset temperature and a maximum permissible temperature value of the component after a current temperature value of the component has exceeded a switching-on threshold value for the purpose of component protection;
- adjusts the preset temperature based on the air-fuel mixture adjustment;
- and
- further regulates the exhaust gas temperature by adjusting the air-fuel mixture as a function of the adjusted preset temperature and the maximum permissible temperature value of the component.
Dependencies are inferred from the claim text.