A transport refrigeration system having: a refrigerated cargo space (119); a refrigeration unit (22) in operative association with the refrigerated cargo space, the refrigeration unit providing conditioned air to the refrigerated cargo space; a first engine (150) configured to power the vehicle; a second engine (26) configured to power the refrigeration unit; a first plurality of fuel tanks (350) fluidly connected to first engine, the first plurality of fuel tanks configured to supply fuel to the first engine; a second plurality of fuel tanks (330) fluidly connected to second engine, the second plurality of fuel tanks configured to supply fuel to the second engine; and a single filling point (310) fluidly connected to the first plurality of fuel tanks and second plurality of fuel tanks. The single filling point (310) is configured to receive fuel.

Disclosed is a method for monitoring pressure, for a vessel assembly including a sealed vessel capable of holding a liquid, a filter capable of capturing vapors from the liquid, a pipe connecting the vessel to the filter, and an isolation valve arranged to selectively shut off the pipe, including a detection of the boiling of the liquid contained in the vessel.

A method for a fuel system is provided, comprising adjusting a volume of a sealed fuel tank while maintaining spatial compartmentalization of bulk fuel within the sealed fuel tank, and indicating degradation of the sealed fuel tank based on a change in fuel tank pressure. In this way, the fuel tank may be tested for leaks without being unsealed, and without engaging the fuel pump or other elements of the fuel delivery system.

Disclosed is a method for controlling the pressure inside a fuel tank of a motor vehicle, the motor vehicle including a fuel vapor vent circuit connecting the tank to a fuel vapor canister, the vent circuit including an isolation valve for isolating the tank and a rollover valve. The pressure control method includes steps of: determining an activation duration required for the isolation valve to transition from a closed state to a fully open state, referred to as the full opening duration, when a predefined rollover valve closure risk criterion is satisfied: controlling the isolation valve in repeated activations of respective durations that are shorter than the full opening duration.

Example methods and apparatus to ensure grounding between vehicles during a vehicle-to-vehicle refueling operation are described herein. An example vehicle described herein is to receive fuel from a refueling vehicle via a vehicle-to-vehicle refueling operation. The example vehicle includes a fuel tank having a vent passageway, a valve coupled to the vent passageway, and a controller to close the valve if the vehicle and the refueling vehicle are not electrically coupled during the vehicle-to-vehicle refueling operation.

An evaporative fuel treatment apparatus, which is loaded on a hybrid vehicle equipped with a fuel tank and a battery mounted forward of the fuel tank, has a sealing valve for sealing evaporative fuel in the fuel tank. The sealing valve is disposed between the battery and the fuel tank and is arranged above the battery. The evaporative fuel treatment apparatus can prevent fuel leakage from the sealing valve more reliably.

A fuel filling apparatus and method for a bi-fuel vehicle using both gasoline and liquefied petroleum gas (LPG) as fuel are provided to an LPG fuel tank. The fuel filling apparatus and method are capable of temporarily burning a portion of LPG fuel after collecting a fuel portion, using a gasoline fuel tank and a canister, when the internal pressure of the LPG fuel tank in the bi-fuel vehicle is equal to or greater than an LPG filling pressure of a filling gun. Additionally, the internal pressure of the LPG fuel tank is decreased to a level below the LPG filling pressure of the filling gun, thereby achieving smoother LPG fuel filling of the LPG fuel tank by the filling gun.

A method for operating a hybrid vehicle, wherein the hybrid vehicle has an electric engine, an electric traction energy accumulator interacting with the electric engine, an internal combustion engine, and a fuel tank interacting with the internal combustion engine, includes starting from a purely electric driving mode in which the internal combustion engine is shut down and in which a shut-off valve of the fuel tank is closed, opening the shut-off valve of the fuel tank and starting up the internal combustion engine depending on defined operating conditions. The defined operating conditions include a current charging state of the traction energy accumulator and a current pressure in the fuel tank.

A pressure relief valve (10) is provided for controlling fluid flow between a first fluid path (12a) and a second fluid path (12b). The pressure relief valve includes a housing (14), a diaphragm member (24) movably affixed within the housing and having a fluid port (18), a first biasing member (20) for urging the diaphragm member in a first direction, and a sealing member (26) movably mounted in the housing and configured for reversibly sealing the fluid port (18). When a pressure at the second fluid path (12b) exceeds a first predetermined threshold the diaphragm member (24) is pushed against the first biasing member (20), and the sealing member (26) is initially urged towards the fluid port (18) and subsequently becomes disengaged with the fluid port, allowing fluid communication between the second fluid path (12b) and the first fluid path (12a) via the fluid port. When the pressure at the second fluid path (12b) decreases below a second predetermined threshold, the sealing member (26) becomes disengaged from the diaphragm member (24), allowing fluid communication between the first fluid path and the second fluid path via the fluid port. A valve assembly including the pressure release valve (10) and an externally actuated valve (60) is also provided.

A pressure relief assembly includes a plurality of valve components and a cap configured to house the valve components. The cap includes a ring having a retaining portion. The pressure relief assembly includes a sensor apparatus coupled to the cap via the ring. The sensor apparatus is configured to sense whether a predetermined pressure threshold is reached. The valve components operate to relieve pressure when the predetermined pressure threshold is reached. The sensor apparatus includes a retaining portion engaging the retaining portion of the ring. A valve assembly includes a first valve apparatus and the pressure relief assembly configured to bypass the first valve apparatus. The valve assembly includes a main housing that surrounds the first valve apparatus and the pressure relief assembly. The main housing defines an aperture in which the cap of the pressure relief assembly is at least partially disposed in the aperture.