It is an object to suppress turbo lag, while suppressing a decrease in torque in an acceleration-transient state to a supercharged state, occurring owing to a rise in required load. In a prescribed steady state, an engine compression ratio µm and ignition...

The engine (10) has two groups in which each group is provided with two cylinders (30). One cylinder of first group is formed as the cylinder that can be switched in a load-dependent manner. The two groups are characterized by different compression ratios....

The auto-ignition internal combustion engine (10) has two groups of cylinders having different compression ratios. Each cylinder of one group has a compression ratio greater than the compression ratio of each cylinder of the other group. In event of partia...

A determination is made as to whether or not knocking is actually occurring inside a combustion chamber (5), and on the basis of the knocking detection result, a knocking-correlated parameter (octane number, alcohol concentration, compression ratio of the ...

A variable compression ratio engine control apparatus includes a fuel injection section, a variable compression ratio section (20), a target compression ratio setting section and a compression ratio controlling section. The fuel injection section injects f...

The present invention provides an engine system control device to be applied to an engine system provided with an engine having a variable compression ratio mechanism capable of changing a compression ratio. In the case where generation of failure in a com...

A determination is made as to whether or not knocking is actually occurring inside a combustion chamber (5), and on the basis of the knocking detection result, a knocking-correlated parameter (octane number, alcohol concentration, compression ratio of the ...

In an internal combustion engine having a compression ratio varying mechanism, in response to detection of the occurrence of any failure or trouble in the compression ratio varying mechanism, the control technique of the invention restricts execution of a ...