Operating method for an internal combustion engine with lambda-value control
First Claim
1. Method for the cylinder-selective control of an air/fuel mixture to be burnt in a multi-cylinder internal combustion engine, in which the lambda values for different cylinders or groups of cylinders are separately sensed and controlled,characterized in that the lambda values of the individual cylinders or groups of cylinders are simultaneously controlled to different required values using at least one of an integrating I-control proportion with variable integrator slope and a differentiating D-control proportion.
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Abstract
The invention relates to a method for the cylinder-selective control of an air/fuel mixture to be burnt in a multi-cylinder internal combustion engine, in which the lambda values for different cylinders or groups of cylinders are separately sensed and controlled, and also relates to a multi-cylinder internal engine suitable for carrying out the method. In accordance with the invention, the lambda values of the individual cylinders or groups of cylinders are simultaneously controlled to different required values using an integrating I-control proportion with variable integrator slope and/or a differentiating D-control proportion.
26 Citations
6 Claims
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1. Method for the cylinder-selective control of an air/fuel mixture to be burnt in a multi-cylinder internal combustion engine, in which the lambda values for different cylinders or groups of cylinders are separately sensed and controlled,
characterized in that the lambda values of the individual cylinders or groups of cylinders are simultaneously controlled to different required values using at least one of an integrating I-control proportion with variable integrator slope and a differentiating D-control proportion.
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5. Multi-cylinder internal combustion engine, having
a control device with a plurality of parallel control units for separate control of lambda values for different cylinders or groups of cylinders by corresponding activation of a mixture formation appliance associated with each cylinder and at least one lambda probe for sensing the lambda values for the different cylinders or groups of cylinders, characterized in that the control units are equipped for simultaneous adjustment of different required lambda values for the different cylinders or groups of cylinders and have at least one of an I-controller component with variable integrator slope and a D-controller component.
Specification