Engine control method
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United States of America Patent
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Jun 30, 2015
Grant Date -
Jan 24, 2013
app pub date -
Jul 20, 2012
filing date -
Jul 22, 2011
priority date (Note) -
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Abstract
Embodiments of the present invention include an engine control method for controlling an engine having an accessory. In the method, a relationship between a torque of the accessory and a controlled variable corresponding to each rotational speed of the engine is stored in advance. An estimated value of the controlled variable is calculated based on a calculated value of the torque of the accessory and the engine rotational speed by reference to the said relationship. A command value of the controlled variable is calculated based on at least one of the engine rotational speed, opening of a throttle, opening of an accelerator and an air supply pressure. A calculated difference is determined by comparing the estimated value of the controlled variable and the command value of the controlled variable.
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