EXHAUST PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE
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United States of America Patent
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Feb 5, 2016
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Feb 18, 2015
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Abstract
An exhaust purification apparatus for an internal combustion engine has an exhaust purification catalytic agent disposed in an exhaust passage. The exhaust purification apparatus for the internal combustion engine has an exhaust throttle valve, an actuator, and a controller. The exhaust throttle valve is arranged upstream of the exhaust purification catalytic agent in the exhaust passage and changes a passage sectional area of the exhaust passage. The actuator operates the exhaust throttle valve to be open and closed. The controller controls the exhaust throttle valve to be open and closed through the actuator. The controller decreases an opening degree of the exhaust throttle valve to narrow the passage sectional area of the exhaust passage upon a heating request for heating the exhaust purification catalytic agent.
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