Actuator for internal combustion engine exhaust gas system does not require external power supply, is very cheap to manufacture and requires little space - has shape memory alloy element suitable for high temp. that exerts setting or control function depending on temp. of exhaust gas

摘要

The actuator has a shape memory alloy or SMA element (30) suitable for high temp. that exerts the setting or control function depending on the temp. of the exhaust gas. The SMA element can be exposed to the exhaust gas from the internal combustion engine either directly or indirectly and can be a rod-shaped element that is linearly expandable or a helical element.