The present invention discloses an oil-gas dual-purpose integrated switch. The oil-gas dual-purpose integrated switch comprises a valve and a knob switch for controlling an ignition coil and a carburetor solenoid valve; the valve cap is fixed on the valve body to form a valve cavity; the valve core is disposed in the valve body; the valve core passes through the valve cap to be fixed with the knob of the knob switch such that when the knob switch is rotated, the valve core is driven to rotate; the valve body is provided with an oil inlet pipe joint, an oil outlet pipe joint, a gas inlet pipe joint and a gas outlet pipe joint which are communicated with the valve cavity; the valve core is provided with an oil duct, and a gas duct. The oil-gas dual-purpose integrated switch can switch the oil path and the gas path randomly.

A pressure regulator for regulating a differential pressure between a first fluid pressure of a first fluid and a second fluid pressure of a second fluid is disclosed. The pressure regulator has a valve between a regulator body and a valve member. The valve member is moveably disposed within a first longitudinal bore of the regulator body between a first-fluid-pressure sensing chamber and a second-fluid-pressure sensing chamber. The first-fluid-pressure sensing chamber is in fluid communication with the first-fluid inlet and the second-fluid-pressure sensing chamber is in fluid communication with the second-fluid port. The valve member is moveable between a closed position where a cross-sectional flow area through the valve is below a predetermined level and an open position where the cross-sectional flow area through the valve is above the predetermined level.

A dual fuel system for a combustion engine includes an air and fuel mixer configured to mix air and fuel provided to the combustion engine, a first fuel path for a first fuel, and a second fuel path for a second fuel. The first and second fuels have different physical and chemical properties. The dual fuel system also includes a common fuel path coupled to the air and fuel mixer and both the first and second fuel paths, wherein the common fuel path includes an electronically controlled valve configured to regulate the air to fuel ratio of an air/fuel mixture provided to the combustion engine in response to control signals from a controller, and both the first and second fuel paths are coupled to the common fuel path at a location upstream of the electronically controlled valve.

A fuel selector for use with a dual fuel generator includes a selector plate, a first fuel valve assembly positioned adjacent the selector plate and actuatable between an ON position and an OFF position to selectively control a first fuel flow to an engine of the dual fuel generator, and a second fuel valve assembly positioned adjacent the selector plate and actuatable between an ON position and an OFF position to selectively control a second fuel flow to the engine of the dual fuel generator. A selector switch coupled to the selector plate is linearly translatable from a first position to a second position, so as to enable positioning of only one of the first fuel valve assembly and the second fuel valve assembly in the ON position at a given time, such that the first and second fuel valve assemblies cannot be in the ON position concurrently.

An apparatus includes a pressure regulator, an in-cylinder fuel injector and a controller programmed to, when fueling with a first gaseous fuel, command the regulator to regulate the pressure of the first gaseous fuel to a first injection pressure; and command the injector to inject within 90 CA of TDC during a compression stroke an injected quantity of a first gaseous fuel into the combustion chamber at the first injection pressure, and when fueling with a second gaseous fuel, to command the regulator to regulate the pressure of the second gaseous fuel to a second injection pressure; and command the injector to inject within 90 CA of TDC during the compression stroke an injected quantity of a second injected gaseous fuel.

A fuel selector for use with a dual fuel generator includes a selector plate, a first fuel valve assembly positioned adjacent the selector plate and actuatable between an ON position and an OFF position to selectively control a first fuel flow to an engine of the dual fuel generator, and a second fuel valve assembly positioned adjacent the selector plate and actuatable between an ON position and an OFF position to selectively control a second fuel flow to the engine of the dual fuel generator. A selector switch coupled to the selector plate is linearly translatable from a first position to a second position, so as to enable positioning of only one of the first fuel valve assembly and the second fuel valve assembly in the ON position at a given time, such that the first and second fuel valve assemblies cannot be in the ON position concurrently.

A dual fuel system for an internal combustion engine includes a plurality of fuel injectors, a first fuel pump and a first fuel conduit extending to the plurality of fuel injectors, and a second fuel pump and a second fuel conduit extending to a fuel manifold fluidly connected to the plurality of fuel injectors. The dual fuel system also includes an overflow buffer arranged to receive a volume of the second fuel expelled from the second fuel conduit, and a valve movable from a closed position to an open position fluidly connecting the overflow buffer to the second fuel conduit. Expelling fuel from the second fuel conduit enables a rapid pressure drop in a supply pressure of the second fuel to hasten switchover of the internal combustion engine between fuel type.

An apparatus includes a pressure regulator, an in-cylinder fuel injector and a controller programmed to, when fueling with a first gaseous fuel, command the regulator to regulate the pressure of the first gaseous fuel to a first injection pressure; and command the injector to inject within 90 CA of TDC during a compression stroke an injected quantity of a first gaseous fuel into the combustion chamber at the first injection pressure, and when fueling with a second gaseous fuel, to command the regulator to regulate the pressure of the second gaseous fuel to a second injection pressure; and command the injector to inject within 90 CA of TDC during the compression stroke an injected quantity of a second injected gaseous fuel.

The present disclosure provides a multifunctional switch base assembly and a control method thereof, solving problems such as safety of switching between fuel and gas. The multifunctional switch base assembly comprises a switch base, where a switch knob as well as a gas switch assembly and an oil line switch assembly which are controlled by the switch knob to turn on or off are mounted on the switch base, the gas switch assembly and the oil line switch assembly are connected to a control module, and the control module is connected to a storage battery and an ignition coil. The present disclosure has the advantages of high safety, stable switching and the like.

A method of regulating and injecting a gaseous fuel in an internal combustion engine includes regulating a pressure of the gaseous fuel to an injection pressure at an engine load and an engine speed; and injecting within 90 crank angle degrees of top dead center during a compression stroke of the internal combustion engine an injected quantity of the gaseous fuel into a combustion chamber at the injection pressure; where the gaseous fuel comprises hydrogen; where the injection pressure equals a product of a peak cylinder pressure multiplied by a multiplication factor, the multiplication factor within a range of 1.15 and 1.4; and where the injected quantity of the gaseous fuel is burned in a diffusion combustion mode.