| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a device for control of an internal combustion engine provided with a structure capable of coping with decline in a compression pressure in a cylinder when the decline arises. <P>SOLUTION: An arithmetic processing device stores a PV<SP POS="POST">κ</SP>calculation processing for calculating a heat generation amount correlation parameter PV<SP POS="POST">κ</SP>. During fuel-cut of an internal combustion engine, an in-cylinder pressure P is calculated on the basis of an in-cylinder pressure sensor output immediately after an intake valve is closed. An in-cylinder volume V immediately after the intake valve is closed is calculated. The PV<SP POS="POST">κ</SP>immediately after the intake valve is closed is denoted as "PV<SP POS="POST">κ</SP><SB POS="POST">1</SB>". During the fuel-cut of the internal combustion engine, the in-cylinder pressure P is calculated on the basis of the in-cylinder pressure sensor output at a prescribed crank angle θ in a period immediately after the intake valve is closed to the opening of an exhaust valve. The in-cylinder volume V at the prescribed crank angle θ is calculated. The PV<SP POS="POST">κ</SP>at the prescribed crank angle θ is denoted as "PV<SP POS="POST">κ</SP><SB POS="POST">θ</SB>". A compression pressure reduction rate is calculated on the basis of PV<SP POS="POST">κ</SP><SB POS="POST">θ</SB>/PV<SP POS="POST">κ</SP><SB POS="POST">1</SB>. <P>COPYRIGHT: (C)2012,JPO&INPIT |
