Mechanical valve play compensation element for a valve drive on a piston combustion engine
The invention relates to a method for determining the reducing agent concentration (NH ) in the exhaust-gas flow of an internal combustion engine. The invention relates to a mechanical valve play compensation element for a valve drive on a piston combustion engine, comprising a first pressure part (...
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| Main Author | |
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| Format | Patent |
| Language | English |
| Published |
28.12.2004
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| Online Access | Get full text |
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| Summary: | The invention relates to a method for determining the reducing agent concentration (NH
) in the exhaust-gas flow of an internal combustion engine.
The invention relates to a mechanical valve play compensation element for a valve drive on a piston combustion engine, comprising a first pressure part () which is axially displaceable in relation to a second pressure part () and which is fixed in such a way that it can turn about the axis of displacement; a torsion spring element () which acts between the first pressure part () and the second pressure part () and is axially flexible at least to a certain extent; and at least one helical surface () on the first pressure part (), to which a corresponding helical surface () on the second pressure part () is allocated, these forming a pair of helical surfaces (). The surfaces of the helical surface pair () are configured as a rough surface and are pressed against each other by the torsion spring element (). |
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