| 摘要 |
PROBLEM TO BE SOLVED: To prevent the durability of a throttle valve and a throttle valve drive means from being lowered by preventing hunching from occurring in a throttle opening when an engine is operated in a steady state. SOLUTION: A target engine load factor KLT is calculated. A target throttle openingθtT necessary for changing an actual engine load factor KL to the target engine load factor KLT is calculated based on an intake pipe pressure which is a pressure in an intake passage on the downstream side of the throttle valve. A convergent throttle openingθtCV which is a throttle opening to converge when the target engine load factor KLT is assumed to be held at the calculated KLT is calculated. In the transient operation of the engine, the target throttle openingθtT is set to a final target throttle openingθtTf, and in the steady operation of the engine, the convergent throttle openingθtCV is set to the target throttle openingθtTf. Next, the throttle valve is driven so that the actual throttle openingθt matches the final target throttle openingθtTf. COPYRIGHT: (C)2006,JPO&NCIPI
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