Control method of internal combustion engine
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United States of America Patent
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Apr 18, 2017
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N/A
app pub date -
Aug 13, 2015
filing date -
Aug 27, 2014
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Abstract
A control method takes an internal combustion engine including a port injection valve that injects fuel into an intake port and a cylinder injection valve that directly injects fuel into a combustion chamber as a control target. In the control method, when request torque to the internal combustion engine is in a first torque range, lean combustion is realized by port asynchronous injection. When the request torque is increased from the first torque range to a second torque range which is higher than the first torque range, fuel injection is switched to port synchronous injection from port asynchronous injection, and lean combustion is realized by the port synchronous injection. When the request torque is increased from the second torque range to a third torque range that is higher than the second torque range, the port synchronous injection is stopped, and lean combustion is realize by cylinder injection.
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