The disclosure relates to an engine having a cylinder head which is divided into multiple sections which each delimit a combustion chamber of a cylinder of the engine and which each comprise inlet and outlet ducts, inlet and outlet valves, and a spark device which is fastened in a through hole of the cylinder head section, for at least one cylinder head section a throttle flap being provided for completely closing the corresponding inlet duct in the event of a deactivation of the associated cylinder. In the at least one cylinder head section, a first gas flow duct is formed between the through hole and the outlet duct, and the spark device is in the form of a rotary slide valve with integrated spark electrodes and is configured to selectively either keep the first gas flow duct closed or connect said first gas flow duct to the associated combustion chamber.

The disclosure relates to an engine having a cylinder head which is divided into multiple sections which each delimit a combustion chamber of a cylinder of the engine and which each comprise inlet and outlet ducts, inlet and outlet valves, and a spark device which is fastened in a through hole of the cylinder head section, for at least one cylinder head section a throttle flap being provided for completely closing the corresponding inlet duct in the event of a deactivation of the associated cylinder. In the at least one cylinder head section, a first gas flow duct is formed between the through hole and the outlet duct, and the spark device is in the form of a rotary slide valve with integrated spark electrodes and is configured to selectively either keep the first gas flow duct closed or connect said first gas flow duct to the associated combustion chamber.

An engine having at least a primary and secondary fuel supplies is configured to operate by determining a fueling mode for each of first and second groupings of cylinders, independently. A method, therefore, for operating the engine includes monitoring engine operating parameters with an electronic controller, determining an engine operating point based on the engine operating parameters, calculating a first operating mode of a first cylinder grouping based on the engine operating point, calculating a second operating mode of a second cylinder grouping based on the engine operating point, and selectively activating at least one of a diesel injector, a gaseous fuel injector and a spark device in each engine cylinder separately and selectively for each cylinder of the first and second cylinder grouping based on the engine operating point.

An engine having at least a primary and secondary fuel supplies is configured to operate by determining a fueling mode for each of first and second groupings of cylinders, independently. A method, therefore, for operating the engine includes monitoring engine operating parameters with an electronic controller, determining an engine operating point based on the engine operating parameters, calculating a first operating mode of a first cylinder grouping based on the engine operating point, calculating a second operating mode of a second cylinder grouping based on the engine operating point, and selectively activating at least one of a diesel injector, a gaseous fuel injector and a spark device in each engine cylinder separately and selectively for each cylinder of the first and second cylinder grouping based on the engine operating point.

An engine control device (1) having a supercharger (30) includes an injection controller (3) that controls injections of fuel through a cylinder injection valve (11) and through a port injection valve (12), based on a rotation speed Ne of an engine (10), and a variable valve controller (5) that controls a variable valve actuating mechanism (40) based on the rotation speed Ne. The variable valve controller (5) provides a valve overlap period in a first rotation speed region, and shortens the valve overlap period in a second rotation speed region of greater rotation speeds Ne than in the first rotation speed region. The injection controller (3), in the period during which the rotation speed is shifting from the first rotation speed region to the second rotation speed region, carries out a cylinder injection and a port injection, and advances timing for injecting the fuel through the port injection valve (12).

An engine control device (1) having a supercharger (30) includes an injection controller (3) that controls injections of fuel through a cylinder injection valve (11) and through a port injection valve (12), based on a rotation speed Ne of an engine (10), and a variable valve controller (5) that controls a variable valve actuating mechanism (40) based on the rotation speed Ne. The variable valve controller (5) provides a valve overlap period in a first rotation speed region, and shortens the valve overlap period in a second rotation speed region of greater rotation speeds Ne than in the first rotation speed region. The injection controller (3), in the period during which the rotation speed is shifting from the first rotation speed region to the second rotation speed region, carries out a cylinder injection and a port injection, and advances timing for injecting the fuel through the port injection valve (12).

An engine includes: a piston including a cavity; a cylinder head configured to form a combustion chamber having a pent roof shape; a fuel injection valve configured to inject fuel from a second half of a compression stroke until a first half of an expansion stroke; and a spark plug arranged at a position corresponding to an upper side of the cavity. Injection openings are arranged in a circumferential direction surrounding a longitudinal axis of the valve. The combustion chamber at a compression top dead center is divided into a plurality of fuel injection regions, located in respective injection directions of the injection openings, by vertical surfaces extending radially from the longitudinal axis through a middle between adjacent injection openings. When a volume of the fuel injection region located in the injection direction of the injection opening is large, an opening area of the injection opening is large.

An engine includes: a piston including a cavity; a cylinder head configured to form a combustion chamber having a pent roof shape; a fuel injection valve configured to inject fuel from a second half of a compression stroke until a first half of an expansion stroke; and a spark plug arranged at a position corresponding to an upper side of the cavity. Injection openings are arranged in a circumferential direction surrounding a longitudinal axis of the valve. The combustion chamber at a compression top dead center is divided into a plurality of fuel injection regions, located in respective injection directions of the injection openings, by vertical surfaces extending radially from the longitudinal axis through a middle between adjacent injection openings. When a volume of the fuel injection region located in the injection direction of the injection opening is large, an opening area of the injection opening is large.

An engine having at least a primary and secondary fuel supplies is configured to operate by determining a fueling mode for each of first and second groupings of cylinders, independently. A method, therefore, for operating the engine includes monitoring engine operating parameters with an electronic controller, determining an engine operating point based on the engine operating parameters, calculating a first operating mode of a first cylinder grouping based on the engine operating point, calculating a second operating mode of a second cylinder grouping based on the engine operating point, and selectively activating at least one of a diesel injector, a gaseous fuel injector and a spark device in each engine cylinder separately and selectively for each cylinder of the first and second cylinder grouping based on the engine operating point.

An engine having at least a primary and secondary fuel supplies is configured to operate by determining a fueling mode for each of first and second groupings of cylinders, independently. A method, therefore, for operating the engine includes monitoring engine operating parameters with an electronic controller, determining an engine operating point based on the engine operating parameters, calculating a first operating mode of a first cylinder grouping based on the engine operating point, calculating a second operating mode of a second cylinder grouping based on the engine operating point, and selectively activating at least one of a diesel injector, a gaseous fuel injector and a spark device in each engine cylinder separately and selectively for each cylinder of the first and second cylinder grouping based on the engine operating point.