Four-stroke internal combustion engine with at least two inlet valves

A four-stroke internal combustion engine with at least two inlet valves and an inlet flow path with at least two inlet ports per cylinder which branch off from a common inlet pipe and are guided separately up to the inlet valves and of which at least one inlet port is designed as a charge loading port and at least one inlet port as a volumetric port, with a throttle device for volumetric control being provided in the inlet flow path and the inlet flow path being connected with a fuel supply device, wherein the fuel supply device is formed by a joint carburetor for both inlet ports, wherein the carburetor is provided with a full-load power jet which is arranged in the direction of flow to the volumetric port, so that the fuel jet of the full-load power jet predominantly enters the volumetric port.

A four-stroke internal combustion engine with at least two inlet valves and an inlet flow path with at least two inlet ports per cylinder which branch off from a common inlet pipe and are guided separately up to the inlet valves and of which at least one inlet port is designed as a charge loading port and at least one inlet port as a volumetric port, with a throttle device for volumetric control being provided in the inlet flow path and the inlet flow path being connected with a fuel supply device, wherein the fuel supply device is formed by a joint carburetor for both inlet ports, wherein at least one self-opening diaphragm valve is provided in the port separating wall between the two inlet ports downstream of the throttle device, which diaphragm valve connects the two inlet ports and which produces the flow connection from the charge loading port to the volumetric port in the case of pressure difference.

A four-stroke internal combustion engine with at least two inlet valves and an inlet flow path with at least two inlet ports per cylinder which branch off from a common inlet pipe and are guided separately up to the inlet valves and of which at least one inlet port is designed as a charge loading port and at least one inlet port as a volumetric port, with a throttle device for volumetric control being provided in the inlet flow path and the inlet flow path being connected with a fuel supply device, wherein the fuel supply device is formed by a joint carburetor for both inlet ports, wherein downstream of the throttle device at least one exhaust gas return conduit opens into at least one inlet port and wherein the exhaust gas return conduit opens into at least one inlet port and wherein the exhaust gas return can be actuated by a slide valve which is coupled with the control for the throttle device.

A four-stroke internal combustion engine with at least two inlet valves and an inlet flow path with at least two inlet ports per cylinder which branch off from a common inlet pipe and are guided separately up to the inlet valves and of which at least one inlet port is designed as a charge loading port and at least one inlet port is volumetric port, with a throttle device for volumetric control being provided in the inlet flow path and the inlet flow path being connected with a fuel supply device, wherein the fuel supply device is formed by a joint carburetor for both inlet ports, wherein the length of the charge loading port and the volumetric port is different, with the charge loading port being longer than the volumetric port.

A four-stroke internal combustion engine with at least two inlet valves and an inlet flow path with at lest two inlet ports per cylinder which branch off from a common inlet pipe and are guided separately up to the inlet valves and of which at least one inlet port is designed as a charge loading port and at least one inlet port as a volumetric port, with a throttle device for volumetric control being provided in the inlet flow path being connected with a fuel supply device, wherein the fuel supply device is formed by a joint carburetor for both inlet ports, wherein at least two inlet ports are arranged above one another in the zone of the carburetor outlet and wherein the volumetric port is arranged above the charge loading port.

A four-stroke internal combustion engine with at least two inlet valves and an inlet flow path with at least two inlet ports per cylinder which branch off from a common inlet pipe and are guided separately up to the inlet valves and of which at least one inlet port is designed as a charge loading port and at least one inlet port as a volumetric port, with a throttle device for volumetric control being provided in the inlet flow path and the inlet flow path being connected with a fuel supply device, wherein the fuel supply device is formed by a joint carburetor for both inlet ports, wherein at least one inlet port is provided with at least one stall edge.

A four-stroke internal combustion engine with at least two inlet valves and an inlet flow path with at least two inlet ports per cylinder which branch off from a common inlet pipe and are guided separately up to the inlet valves and of which at least one inlet port is designed as a charge loading port and at least one inlet port as a volumetric port, with a throttle device for volumetric control being provided in the inlet flow path and the inlet flow path being connected with a fuel supply device, wherein the fuel supply device is formed by a joint carburetor for both inlet ports, wherein a port loop is arranged in one of the inlet ports.