A vehicle includes a residual pressure holding valve provided downstream a feed pump of a fuel to hold a pressure in a fuel pipe leading to the port injection valve. Residual pressure holding valve is opened to return the fuel in the fuel pipe to the fuel tank when the pressure in the fuel pipe exceeds a valve opening pressure, and closed when the pressure in the fuel pipe is lower than the valve opening pressure. At the time of a request to reduce a target pressure of the fuel to be supplied to the electric feed pump, a control device refrains from causing the target pressure to decrease when a load of the engine is smaller than a prescribed value, and causes the target pressure to decrease when the load of the engine is greater than the prescribed value.

Methods and systems are provided for the integration of a fuel level sensor and a fuel pressure sensor in a fuel tank within a fuel system. In one example, an integrated fuel pressure and fuel level sensor for a fuel tank may include a float arm of the fuel sensor coupled to a floating body and a pressure sensor (e.g., a fuel tank pressure transducer) coupled to the floating body, the integrated fuel pressure and fuel level sensor adapted to simultaneously measure fuel level and fuel vapor pressure of the fuel tank.

For the functional testing of an arrangement for dynamic fuel consumption measurement, at least two reference flows are produced through successive operation, at different frequencies, of a system pump (6) provided in any case for the regulated fuel flow, and the gradient determined from the reference measured values obtained is compared with the known gradients of the characteristic curve of the system pump (6).

Various methods and systems are provided diagnosing a valve. In one example, a system comprises a valve configured to regulate a fuel flow, and a controller configured to determine degradation of the valve based on an initial opening characteristic of the valve.

A fuel injection apparatus for an internal combustion engine includes a fuel supply line in communication with a fuel tank and a fuel pump system. A fuel rail is connected to the fuel supply system and a plurality of fuel injectors. A return line extending from the fuel rail to the fuel tank. A by-pass passage extending from the supply line to the return line and including a pressure release valve having a pre-set activation pressure. A fuel temperature sensor for sensing a feed temperature of the fuel in the fuel supply system. A pressure control module that sets a first pressure set point in the fuel rail below the pre-set activation pressure when the feed temperature is below a predetermined temperature and sets a second pressure set point above the pre-set activation pressure of the pressure release valve when the feed temperature is above the predetermined temperature.

A fuel supply apparatus able to stop actuating of a fuel supply pump without mounting a special fuel supply sensor when the fuel supply is stopped or becomes slow, includes a control section which calculates an amount of the fuel in the fuel tank based upon a signal from a fuel gauge, and outputs the result to a fuel meter. The control section also calculates from the fuel gauge signal the amount of the supplied into the fuel tank per unit of time, and if the amount of the fuel supplied per unit of time is determined to be less than a set supply rate, the fuel supply pump is stopped so that a malfunction of the fuel supply can be detected without mounting a special fuel supply sensor.

A gasoline gasification apparatus comprising a gasifier housing (1). An electronic control fuel inlet nozzle (2) is mounted on the gasifier housing (1). One end of the electronic control fuel inlet nozzle (2) is connected to a gasoline feed pipe (7). The other end of the electronic control fuel inlet nozzle (2) is in communication with a cavity (3) of the gasifier housing (1). An electric heating component (4) is mounted in the cavity (3). A vapor outlet (5) is provided on the cavity (3). The electric heating component (4) mounted in the cavity (3) is connected to a controllable power source (6). This gasoline gasifier apparatus sublimates injected gasoline droplets into gaseous state, thus allowing gasoline molecules to come into complete contact with oxygen, ensuring complete combustion of gasoline in an engine, and reducing emission of pollutants.

One embodiment of the invention relates to an electronic fuel injection module including a throttle body including a throat extending between an inlet port and an outlet port and a fuel delivery injector too unit. The fuel delivery injector unit includes a cavity, a fuel inlet, a magnetic assembly, a pumping assembly, a spring, a valve seat, a valve, and an out valve. The fuel inlet receives fuel and directs fuel into the cavity. The magnetic assembly is within the cavity and includes a magnet, a pole, and a hollow sleeve. The pumping assembly includes a bobbin and piston. The bobbin is configured to move the pumping assembly. The piston is coupled to the bobbin. The valve seat is located at one end of the piston. The valve selectively allows fuel to flow into a pressure chamber. The out valve is configured to provide fuel to the throat.

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 internal combustion engine including an intake passage fuel injection valve for injecting fuel into an intake passage and a cylinder inside fuel injection valve for injecting fuel into a combustion chamber, includes: a fuel pump pressurizing and feeding fuel, which is fed from a fuel tank, to the cylinder inside fuel injection valve; a securing part provided on a cylinder head member of the internal combustion engine to secure the fuel pump; an introducing member having heat conductivity, the introducing member connected to the fuel pump and formed with: a first introducing path for introducing fuel from the fuel tank to the fuel pump; and a second introducing path for introducing fuel from the fuel tank to the intake passage fuel injection valve; and a heat transmitting member transmitting heat between the introducing member and the securing part.