| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device of an internal combustion engine, performing HCCI (Homogeneous Charge Compression Ignition) operation as much as possible when releasing a fuel cut. SOLUTION: A valve opening control part 47, when a fuel cut is started during SI (Spark Ignition) operation (cycle 1), fully closes an intake valve 22 and drives an exhaust valve 23 with a small lift to stay EGR gas in a cylinder (cycle 2). Then, the valve opening control part 47 fully closes both intake and exhaust valves 22, 23 to keep the EGR gas remaining in the cylinder (cycles 3-5), and after release of the fuel cut, drives the intake valve 22 with a small lift to introduce fresh air (cycle 6). With this, temperature decrease of the cylinder is suppressed by the heat of the EGR gas, and the EGR gas becoming unnecessary after release of the fuel cut is discharged. Thereafter, the valve opening control part 47 drives the intake and exhaust valves 22, 23 with a small list to start the HCCI operation (cycles 7, 8). COPYRIGHT: (C)2011,JPO&INPIT |
