Premixed-compression-ignition internal combustion engine and method of controlling the same

A valve mechanism control device for a compression-ignition internal combustion engine having a valve mechanism including an intake valve and an exhaust valve arranged in a cylinder of said internal combustion engine;

• and a fuel injector for supplying fuel to a combustion chamber surrounded by said cylinder and a piston, wherein a mixture of the fuel injected from said fuel injector and air sucked into said combustion chamber is ignited by compression action through reciprocal motion of said piston,
• said valve mechanism control device being configured to control auto-ignition timing with at least one of opening timing and closing timing of at least said intake valve and said exhaust valve based on at least an air-to-fuel ratio so that the ignition occurs at an appropriate timing.

A valve mechanism control device for a compression-ignition internal combustion engine having a valve mechanism including at least one intake valve and at least one exhaust valve arranged in a cylinder of said internal combustion engine;

• and a fuel injector having injection holes directed toward a combustion chamber surrounded by a piston and a cylinder wall of said internal combustion engine, wherein a mixture of the fuel injected from said fuel injector and air sucked into said combustion chamber is ignited by compression action through reciprocal motion of said piston,
• said valve control device being configured to control auto-ignition timing with at least one of opening timing and closing timing of the at least intake valve and exhaust valve based on at least a rotating speed of said internal combustion engine so that the ignition occurs at an appropriate timing.

A valve mechanism control device for a compression-ignition internal combustion engine having a valve mechanism including at least one intake valve and at least one exhaust valve arranged in a cylinder of said internal combustion engine;

• and a fuel injector for supplying fuel to a combustion chamber surrounded by said cylinder and a piston, wherein a mixture of the fuel injected from said fuel injector and air sucked into said combustion chamber is ignited by compression action through reciprocal motion of said piston,
• said valve control device being configured to control auto-ignition timing with at least one of opening timing and closing timing of the at least one intake valve and exhaust valve based on at least an atmospheric pressure so that the ignition occurs at an appropriate timing.

A valve mechanism control device for a compression-ignition internal combustion engine having a valve mechanism including at least one intake valve and at least one exhaust valve arranged in a cylinder of said internal combustion engine;

• and a fuel injector for supplying fuel to a combustion chamber surrounded by said cylinder and a piston, wherein a mixture of the fuel injected from said fuel injector and air sucked inside said combustion chamber is ignited by compression action through reciprocal motion of a piston,
• said valve control device being configured to control auto-ignition timing with at least one of opening timing and closing timing of said at least one intake valve and exhaust valve based on at least an intake temperature so that the ignition occurs at an appropriate timing.

A valve mechanism control device for a compression-ignition internal combustion engine having a valve mechanism including at least one intake valve and exhaust valve arranged in a cylinder of said internal combustion engine;

• and a fuel injector for supplying fuel to a combustion chamber surrounded by said cylinder and a piston, wherein a mixture of the fuel injected from said fuel injector and air sucked into said combustion chamber is ignited by compression action through reciprocal motion of said piston, and
• controlling auto-ignition timing with at least one of opening timing and closing timing of said at least one intake valve and exhaust valve minimize a difference between the actual ignition timing and a target ignition timing.

A valve mechanism control device for a compression-ignition internal combustion engine having a valve mechanism including at least one intake valve and at least one exhaust valve arranged in a cylinder of said internal combustion engine;

• and a fuel injector for supplying fuel to a combustion chamber surrounded by said cylinder and a piston, wherein a mixture of the fuel injected from said fuel injector and air sucked into said combustion chamber is ignited by compression action through reciprocal motion of said piston,
• said valve control device being configured to control auto-ignition timing with at least one of opening timing and closing exhaust timing of said at least one intake valve and exhaust valve so that a maximum point of a cylinder pressure falls within 20 degrees after top dead center.