A control system for an internal combustion engine is provided. The engine includes a compression ratio control mechanism (102) and an ignition timing control system (103). The control system comprises an engine control (33) for controlling the compression...

A variable valve timing control apparatus is provided which comprises an operation angle control mechanism (10) capable of varying an intake operation angle, a phase control mechanism (20) capable of varying an intake maximum lift phase, and a control unit...

A device for controlling an internal combustion engine, comprising a variable valve mechanism for varying opening areas (valve lift) or the working angles (valve-opening periods) of at least either the intake valves or the exhaust valves, wherein a pressur...

An internal combustion engine comprises a variable valve control device that varies a lift degree of an intake valve, an air intake passage led to an intake port of the engine that is incorporated with the intake valve and a fuel injection valve arranged t...

An open-close characteristic of an intake valve is controlled so that a target intake air amount for an engine can be obtained, and also a retarded angle limitation of closing timing of an exhaust valve is set based on opening timing of the intake valve, t...