Low pressure EGR apparatus
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United States of America Patent
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Sep 11, 2012
Grant Date -
Aug 19, 2010
app pub date -
Feb 18, 2010
filing date -
Feb 18, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A converting mechanism is provided between an EGR control valve driven by an actuator and an intake-air valve for generating negative pressure, so that the intake-air valve is also driven by the actuator. The converting mechanism has a cam plate rotated together with the EGR control valve and an arm rotated together with the intake-air valve. A cam groove formed in the cam plate is engaged with a driving pin of the arm. The intake-air valve is held at its maximum valve opening position, when the EGR control valve is rotated in a first angular range, while the intake-air valve is rotated from the valve opening position to a maximum valve closing position when the EGR control valve is rotated in a second angular range.
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