An engine includes: a duration apparatus for adjusting an opening duration of an intake valve, a Cylinder De-Activation (CDA) apparatus for controlling deactivation of an exhaust valve, an igniter, an injector for injecting a fuel, an operation state signal unit for measuring an operation state of a vehicle, and a controller for controlling the operations of the duration apparatus, the CDA apparatus, the igniter, and the injector based on an output signal from the operation state signal unit. A control method for this engine includes: determining, by the controller, whether the operation state of the vehicle corresponds to a CDA operation mode; and when the CDA operation mode is determined, operating the CDA apparatus so as to stop the operations of the igniter and the injector, increase an opening duration of the intake valve, and deactivate the exhaust valve by controlling the CDA apparatus.

An engine includes: a duration apparatus for adjusting an opening duration of an intake valve, a Cylinder De-Activation (CDA) apparatus for controlling deactivation of an exhaust valve, an igniter, an injector for injecting a fuel, an operation state signal unit for measuring an operation state of a vehicle, and a controller for controlling the operations of the duration apparatus, the CDA apparatus, the igniter, and the injector based on an output signal from the operation state signal unit. A control method for this engine includes: determining, by the controller, whether the operation state of the vehicle corresponds to a CDA operation mode; and when the CDA operation mode is determined, operating the CDA apparatus so as to stop the operations of the igniter and the injector, increase an opening duration of the intake valve, and deactivate the exhaust valve by controlling the CDA apparatus.

A device for a common rail diesel engine can control an engine phase when the engine is stopped so the engine can be restarted quickly. An engine phase determining means determines an engine phase based on a crank angle and an angle of a camshaft, an engine stop position determining means stores a stopping time spent from the issuance of an engine stop request to the stop of the engine and obtains an engine phase when the engine is stopped based on the engine phase, resulting when the engine stop is requested, and the stopping time, and an at-time-of-stopping injector control means controls fuel injected from the fuel injectors so the engine phase obtained by the engine stop position determining means when the engine is stopped after making the engine stop request allows a piston in a specific cylinder to stop at a bottom dead center of a compression stroke.

A device for a common rail diesel engine can control an engine phase when the engine is stopped so the engine can be restarted quickly. An engine phase determining means determines an engine phase based on a crank angle and an angle of a camshaft, an engine stop position determining means stores a stopping time spent from the issuance of an engine stop request to the stop of the engine and obtains an engine phase when the engine is stopped based on the engine phase, resulting when the engine stop is requested, and the stopping time, and an at-time-of-stopping injector control means controls fuel injected from the fuel injectors so the engine phase obtained by the engine stop position determining means when the engine is stopped after making the engine stop request allows a piston in a specific cylinder to stop at a bottom dead center of a compression stroke.

A system for automatically controlling shut-off of a vehicle includes: a sensor that senses existence of a user in the vehicle; and a vehicle controlling device that determines whether the vehicle is in an idle state, determines whether a user exists in the vehicle based on a sensing value of the sensor, controls the vehicle to automatically shut off, and notifies a user of a vehicle state.

A system for automatically controlling shut-off of a vehicle includes: a sensor that senses existence of a user in the vehicle; and a vehicle controlling device that determines whether the vehicle is in an idle state, determines whether a user exists in the vehicle based on a sensing value of the sensor, controls the vehicle to automatically shut off, and notifies a user of a vehicle state.

Systems and methods for reverse flow detection for a dual fuel engine are disclosed. The engine may include an intake manifold, a liquid fuel supply line and a gaseous fuel supply line, the gaseous fuel supply line including a gaseous fuel supply and a gaseous fuel rail. The method may include: receiving sensed values of gaseous fuel supply pressure, intake manifold pressure, and gaseous fuel rail pressure; determining a threshold value based on the sensed value of gaseous fuel supply pressure; determining a reverse flow in the gaseous fuel supply line based on the sensed values of gaseous fuel supply pressure and gas rail pressure and the determined threshold value; and outputting an indication of reverse flow in response to the determination of reverse flow.

Systems and methods for reverse flow detection for a dual fuel engine are disclosed. The engine may include an intake manifold, a liquid fuel supply line and a gaseous fuel supply line, the gaseous fuel supply line including a gaseous fuel supply and a gaseous fuel rail. The method may include: receiving sensed values of gaseous fuel supply pressure, intake manifold pressure, and gaseous fuel rail pressure; determining a threshold value based on the sensed value of gaseous fuel supply pressure; determining a reverse flow in the gaseous fuel supply line based on the sensed values of gaseous fuel supply pressure and gas rail pressure and the determined threshold value; and outputting an indication of reverse flow in response to the determination of reverse flow.

A combination lever for a carburetor is an integrated shutoff lever and fuel valve. The combination lever includes a longitudinal portion for a handle and a cylindrical portion including a fuel path for the fuel valve. A carburetor casing is shaped to form a valve chamber and a carburetor chamber. The valve chamber supports the cylindrical portion. A directional cavity formed in the cylindrical portion of the combination lever regulates a flow of fuel to the carburetor chamber according to a rotation of the combination lever. At one position the directional cavity opens the fuel path so that fuel flows into the carburetor chamber. At another position the directional cavity closes the fuel path so that the flow of fuel is blocked. The combination lever may also include an abutment portion to engage a switch for completing an electrical shutoff path to an engine coupled to the carburetor.

A combination lever for a carburetor is an integrated shutoff lever and fuel valve. The combination lever includes a longitudinal portion for a handle and a cylindrical portion including a fuel path for the fuel valve. A carburetor casing is shaped to form a valve chamber and a carburetor chamber. The valve chamber supports the cylindrical portion. A directional cavity formed in the cylindrical portion of the combination lever regulates a flow of fuel to the carburetor chamber according to a rotation of the combination lever. At one position the directional cavity opens the fuel path so that fuel flows into the carburetor chamber. At another position the directional cavity closes the fuel path so that the flow of fuel is blocked. The combination lever may also include an abutment portion to engage a switch for completing an electrical shutoff path to an engine coupled to the carburetor.