Auto-ignition internal combustion engine with partial deactivation and method for the operation of an internal combustion engine of said type
AssigneeFord Global Technologies, LLC
InventorsMoritz Klaus Springer, Albert Breuer, Thomas Lorenz, Helmut Hans Ruhland, Jan Linsel
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Abstract
Methods and systems are provided for optimizing the operation of a multi-cylinder auto-ignition internal combustion engine. By configuring the cylinders in multiple groups based on compression ratios, and operating the cylinders in a load-dependent manner, fuel consumption may be optimized.
Claims20
An auto-ignition internal combustion engine having at least two cylinders, in which at least two cylinders are configured so as to form at least two groups with in each case at least one cylinder, the at least one cylinder of at least one group being formed as a cylinder that are switched in a load-dependent manner, wherein
- the at least two groups are characterized by different compression ratios εi, and
- the at least one cylinder of a first group has a compression ratio ε1 and the at least one cylinder of a second group has a compression ratio ε2, where ε2<ε1.
A method, comprising:
- operating first and second cylinders of an engine to carry out auto-ignition combustion, the first cylinder having a higher compression ratio and a lower cylinder volume than the second cylinder;
- and
- deactivating one of the cylinders in a load-dependent manner.
A method, comprising:
- operating first and second cylinders of an engine to carry out auto-ignition combustion, the first cylinder having a higher compression ratio and a lower cylinder volume than the second cylinder;
- and
- deactivating and reactivating each of the first and second cylinders based on engine load compared with respective engine load thresholds.
Dependencies are inferred from the claim text.