An apparatus for filling a liquefied petroleum gas (LPG) vehicle with LPG may include an auxiliary chamber disposed in an LPG bombe of the LPG vehicle, an auxiliary injection line branched from a fuelling line extending to the LPG bombe from a fuel inlet port for connection to the auxiliary chamber, a solenoid valve mounted in the auxiliary injection line to selectively allow or block a flow of LPG to the auxiliary chamber, a temperature sensor to detect a temperature in the bombe, and a controller to control the solenoid valve to be opened when the temperature detected by the temperature sensor is equal to or higher than a critical temperature.

A fuel system and method of controlling the fuel system in an engine using a liquid propane fuel wherein a fluid pressure control module 11 having a housing 12 and plurality of solenoids 20 are provided for venting the fuel pressure in the fuel rails of the fuel system after shut down of the vehicle to reduce fuel leakage from the fuel injectors and fuel rail by having a fuel bleed 20B solenoid vent the fuel pressure in the fuel rail to an evaporative emissions canister, while other solenoids (20R, 20F and 20S) are shut, to further eliminate evaporative fuel emissions from the vehicle during engine shut down.

A gaseous fuel engine system includes a quick start fuel system having a pressurized gaseous fuel supply, a fuel feed conduit and a quick start fuel admission valve. The fuel feed conduit is coupled to an intake conduit for the engine at a downstream fuel admission location. A main fuel system is coupled to the intake conduit at an upstream fuel admission location. The quick start fuel admission valve is electrically actuated to admit a pressured gaseous fuel from the pressurized gaseous fuel supply for quick starting the gaseous fuel internal combustion engine. The quick start fuel may have a fuel composition different than a fuel composition of the main fuel.

An apparatus for filling a liquefied petroleum gas (LPG) vehicle with LPG may include an auxiliary chamber disposed in an LPG bombe of the LPG vehicle, an auxiliary injection line branched from a fuelling line extending to the LPG bombe from a fuel inlet port for connection to the auxiliary chamber, a solenoid valve mounted in the auxiliary injection line to selectively allow or block a flow of LPG to the auxiliary chamber, a temperature sensor to detect a temperature in the bombe, and a controller to control the solenoid valve to be opened when the temperature detected by the temperature sensor is equal to or higher than a critical temperature.

A valve assembly of a fuel supply system includes a first body defining a first bore, an inlet port to receive fuel into the first bore, and an outlet port. The valve assembly further includes a pneumatic chamber disposed in fluid communication with the first bore. The valve assembly further includes a first piston to move between a first position and a second position. The first piston restricts and allows flow of fuel from the inlet port to the outlet port, in the first position and the second position, respectively. The valve assembly further includes a vent passage located upstream of the pneumatic chamber and configured to receive fuel leaked from a flow path defined between the inlet port and the outlet port. The valve assembly also includes a check valve disposed in the vent passage and configured to selectively vent the fuel entering the vent passage.

A valve device includes: a main valve element dividing a valve element space of a housing into first and second pressure chambers; a sealing member configured to isolate the first and second pressure chambers from each other; a first pilot passage including one end communicating with a primary passage, the other end communicating with the second pressure chamber, and a first restrictor; a second pilot passage including a second restrictor and formed at the main valve element; a pilot valve element configured to open and close the second pilot passage; a drive mechanism configured to, when a current flows through the drive mechanism, drive the pilot valve element such that the pilot valve element opens the second pilot passage against biasing force of a biasing member; and a pin coupling the main valve element and the pilot valve element to each other.

A system includes a gas actuated device and the gas actuated device is configured to receive and release gas associated with actuating the gas actuated device. An actuation gas return path is associated gas actuated device and the actuation gas return is path configured to not vent to atmosphere. A method of reducing gas emissions includes providing a first compressor, operating a gas actuated device using actuation gas, and reusing the actuation gas instead of venting the actuation gas to atmosphere or environment.

Methods and systems for accurate and precise fuel supply control for continuous-flow of gaseous fuel to an internal combustion engine over a large dynamic power range, including a dual-stage valve that allows optimal controla first stage in the form of a voice-coil driven electronic pressure regulator, and a second stage in the form of a voice-coil-driven choked-flow valve; monitoring the pressure of the fuel intermediate the two stages and making appropriate adjustments to the first stage via a pressure actuator loop; feeding the gaseous fuel mixture through a unitary block assembly into the second stage; monitoring the pressure of the air/fuel mixture and making appropriate adjustments to the second stage via a valve actuator control loop.

A power generating assembly including an internal combustion engine and a combustion gas supply connected to the internal combustion engine in order to supply combustion gas. The combustion gas supply has an at least double-walled line at least in the region of the internal combustion engine, the line having an inner line volume for combustion gas and an outer line volume. The outer line volume is fluidically connected to an inert gas supply. The power generating assembly also includes a combustion gas pressure adjusting device that adjusts a combustion gas pressure in the inner line volume, and an inert gas pressure adjusting device that adjusts an inert gas pressure in the outer line volume. The combustion gas pressure adjusting device and the inert gas pressure adjusting device select the inert gas pressure and the combustion gas pressure such that the inert gas pressure is higher than the combustion gas pressure.

A valve assembly of a fuel supply system includes a first body defining a first bore, an inlet port to receive fuel into the first bore, and an outlet port. The valve assembly further includes a pneumatic chamber disposed in fluid communication with the first bore. The valve assembly further includes a first piston to move between a first position and a second position. The first piston restricts and allows flow of fuel from the inlet port to the outlet port, in the first position and the second position, respectively. The valve assembly further includes a vent passage located upstream of the pneumatic chamber and configured to receive fuel leaked from a flow path defined between the inlet port and the outlet port. The valve assembly also includes a check valve disposed in the vent passage and configured to selectively vent the fuel entering the vent passage.