Method for controlling the compression ratio of an internal combustion engine
2,max opt A method for controlling the compression ratio ε in a supercharged combustion engine. The latter is provided with a control device in which a maximum final compression temperature Tis ascertained, and, within the framework of a precontrol, an optimum efficiency compression ratio εis ascert...
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| Main Authors | , |
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| Format | Patent |
| Language | English |
| Published |
22.02.2005
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| Online Access | Get full text |
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| Summary: | 2,max opt A method for controlling the compression ratio ε in a supercharged combustion engine. The latter is provided with a control device in which a maximum final compression temperature Tis ascertained, and, within the framework of a precontrol, an optimum efficiency compression ratio εis ascertained. The knock limit is determined from the compression ratio ε, to which it corresponds, and which is ascertained from the precontrol. As a function of the efficiency curve in the characteristics map η=f, a further change occurs in compression ratio γ or a setting back of the change in compression ratio ε. The values learned for ε and the ignition angle as a function of the operating point are permanently stored in a characteristics map to which the engine control has access. |
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