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US 2013/0276749 A1Published application
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 improving 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 improved.
Claims20
An auto-ignition internal combustion engine comprising:
- at least two cylinders wherein the at least two cylinders 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 can be switched in a load-dependent manner,
- the at least two groups are characterized by different compression ratios;
- and
- the at least one cylinder of a first group having a lower compression ratio and the at least one cylinder of a second group having a higher compression ratio and in the event of a partial deactivation in the lower part-load range, the at least one cylinder of the first group is the at least one cylinder in operation.
1 more element
A method, comprising:
- operating first and second cylinder groups of an engine to carry out auto-ignition combustion, the first cylinder group having a lower compression ratio and cylinder volume than the second cylinder group;
- and
- deactivating one of the cylinder groups in a load-dependent manner.
A method, comprising:
- operating first and second cylinder groups of an engine to carry out auto-ignition combustion, the first cylinder group having a lower compression ratio and cylinder volume than the second cylinder group;
- and
- deactivating and reactivating each of the first and second cylinder groups based on engine load compared with respective engine load thresholds.
Dependencies are inferred from the claim text.