Both an improvement in detection accuracy of a valve opening position of a blocking valve and a reduction in time required for learning of the valve opening position are achieved. An evaporated fuel processing apparatus is provided with a learning device configured to learn the valve opening position of the blocking valve. The learning device learns the valve opening position (i) by stepwisely increasing a stroke amount by rotating a stepping motor by two steps at each time in a valve opening direction and (ii) by determining whether a difference between the stroke amount at present and the stroke amount corresponding to the valve opening position is one step of rotation of the stepping motor, or two steps, on the basis of pressure fluctuation on the canister side of the blocking valve associated with the rotation of the stepping motor when the blocking valve is opened, when learning the valve opening position.

A fuel delivery system has a tank, a fuel pump, and an air filtering apparatus coupled with the tank and the fuel pump. The air filtering apparatus includes a housing that defines a housing chamber, a fuel flow controller coupled with the housing, and a passive separator disposed within the housing chamber. The passive separator is constructed and arranged to separate air and fuel of a fuel mixture passively while the fuel mixture enters the housing chamber from the tank and while filtered fuel exits the housing chamber toward the fuel pump in response to operation of the fuel flow controller. Such a system is well-suited for supplying fuel to a combustion engine in which consistent fuel pressure may be critical. Furthermore, the passive separator alleviates the need for a power source for active air and fuel separation, a control mechanism, and so on.

An energy generator includes: an internal combustion engine; a power generator that is driven by the internal combustion engine to generate operating power; a communication interface that receives information given from working equipment; a supply interface that supplies the operating power to the working equipment; and circuitry configured to control at least one of the internal combustion engine and the power generator based on information given from the working equipment through the communication interface.

A fuel booster system having a fuel inlet port, a fuel outlet port, and a fuel accumulator fluidically coupled to both ports. The fuel inlet port allows fuel to be delivered to the fuel accumulator and the fuel outlet port is in fluid communication with a combustion engine to deliver fuel from the fuel booster system to the combustion engine. A source of pressurized gas is also fluidically coupled to the fuel accumulator to deliver pressurized gas through a gas port in one end of the fuel accumulator. A piston is located within the fuel accumulator and the source of pressurized gas can be discharged into the fuel accumulator to force accumulated fuel from the fuel accumulator and to the engine when the fuel booster system determines that the engine needs more fuel.

A fuel supply device (2), in particular for use in a motor vehicle comprising an internal combustion engine (20), has a fuel supply pump (4) which is designed to remove fuel (28) from a fuel tank (6) and to release said fuel under increased pressure through an outlet; a first fluid connection (7) which is provided for connecting an exhaust line metering device (8) and; a second fluid connection (10) which is provided for connecting an engine injection device (12). The first fluid connection (7) is directly connected to the outlet of the fuel supply pump (4). A fluid choke (16) is arranged between the outlet of the fuel supply pump (4) and the second fluid connection (10). The invention enables an exhaust line metering device (8) and an engine injection device (12) to be operated reliably on a common fuel supply device (2).

A high pressure pump for complex injection engines is provided. A body of the high pressure pump includes a first flow path that transports the low pressure fuel flowing in through the low pressure fuel inlet and a low pressure fuel storage chamber that is disposed in a lower portion of the body to store the low pressure fuel transported from the first flow path. A second flow path transports the low pressure fuel stored in the low pressure fuel storage chamber and a flow control valve is disposed over the low pressure fuel storage chamber to discharge the low pressure fuel, transported through the second flow path, to the pressure unit or the damper disposed in an upper portion of the body based on an opening or closing operation. A low pressure fuel outlet discharges the low pressure fuel, transported through the damper, to a low pressure fuel rail.

An improved fuel injection pump is provided for an internal combustion engine (e.g., diesel engine), and is configured such that the secondary hand pump of the prior art can be eliminated. To achieve this result, the injection pump employs a one-way bearing or clutch on the input side of the drive shaft of the injection pump. By employing a one-way bearing or clutch, such as of the concentric roller type, or other suitable clutch, the fuel injection pump can be operated by direct coupling of the engine and the drive shaft of the fuel injection pump. Also with this configuration, once the engine is stopped, the drive shaft of the fuel injection pump can be manually driven in order to prime the system. Accordingly, by locating a one-way bearing or similar clutch device along the driveline of the fuel injection pump, the fuel injection pump can be both manually operated when the engine is shut off and automatically driven when the engine is running.

A fuel system for an internal combustion engine is provided, which comprises a first fuel tank, a fuel filter device, arranged between a low pressure pump operated by an electric motor and a high pressure pump, a first fuel conduit, through which the low pressure pump is arranged to supply fuel to the fuel filter device, and a control device, arranged in connection with an electric motor operating the low pressure pump. An overflow conduit is arranged in connection with a deaeration outlet, arranged in the fuel filter device and the first fuel tank, and the control device is arranged to control the electric motor, in such a way that the low pressure pump is active when the internal combustion engine is turned off for a limited period, whereby fuel may flow from the fuel filter device via the deaeration outlet and the overflow conduit, back to the first fuel tank.

The present invention relates to a fuel system for a combustion engine, the fuel system comprising a low-pressure circuit comprising at least one fuel tank, at least one low-pressure fuel pump, a first fuel filter and a second fuel filter which is arranged downstream of the first fuel pump, and a high-pressure circuit comprising a high-pressure fuel pump. The high-pressure fuel pump comprises means to suck fuel from the low-pressure circuit and in case of failure in the at least one low-pressure fuel pump, to suck fuel from the low-pressure circuit and the fuel is arranged to by-pass the at least one low-pressure fuel pump and optionally, at least one of the first or second fuel filters, via at least one by-pass pipe comprising a check valve that prevents the flow of fuel back to the fuel tank.

A fuel control valve assembly that includes a ball bearing assembly and retainer assembly for a mixture control valve assembly and idle control valve assembly in use with general aviation fuel injector servos is disclosed. The assembly desirably reduces friction and wear on the components of the fuel control valve assembly.