Provided is a compressed natural gas (CNG) fuel system that can include a frame and at least one container. The frame can include a first side and a second side, with each side being configured to partly define a portion of an interior space. The at least one container can be configured to house or contain CNG and can be engaged to and partly encased by the frame. The at least one container can be partly located within the interior space of at least one of the first side or the second side. The frame assembly can be engaged to a chassis of a vehicle such that the at least one container is located either at least partially underneath a cab of the vehicle or at least partially behind a cab of the vehicle.

A fuel management module for use with a CNG fuel system for a vehicle includes a housing configured to be connected to the vehicle and a number of connections, receptacles, and controls associated with the module. A defueling receptacle may be positioned on the front panel of the housing, for defueling a fuel tank of the vehicle. A defueling control valve may be positioned on the front panel of the housing for controlling operation of the defueling receptacle, allowing for selective defueling. One or more high pressure connections may be accessible on the housing and configured for connection to one or more separate fuel tanks in a plug and play configuration. A plurality of filling connections may be accessible on the housing for filling the fuel tank(s). A low pressure fuel output connection may be positioned on the back panel of the housing to provide fuel output from the high pressure connections to the engine.

A fuel management module for use with a CNG fuel system for a vehicle includes a housing configured to be connected to the vehicle and a number of connections, receptacles, and controls associated with the module. A defueling receptacle may be positioned on the front panel of the housing, for defueling a fuel tank of the vehicle. A defueling control valve may be positioned on the front panel of the housing for controlling operation of the defueling receptacle, allowing for selective defueling. One or more high pressure connections may be accessible on the housing and configured for connection to one or more separate fuel tanks in a plug and play configuration. A plurality of filling connections may be accessible on the housing for filling the fuel tank(s). A low pressure fuel output connection may be positioned on the back panel of the housing to provide fuel output from the high pressure connections to the engine.

A work machine includes a machine body on which an engine, a fuel tank, and an oil feed pump are mounted, the machine body being covered with a cover, the machine body including, on an inner side with respect to the cover, an oil feed tube including a hose, the oil feed tube having one end portion connected to a suction aperture of the oil feed pump, and a holder holding the other end portion of the suction tube such that an end of the other end portion faces upward. The holder includes a cap portion having an opening on a lower side and an upper side closed by a lid portion. The oil feed tube is held by the holder such that the other end portion is inserted into the cap portion from the opening.

A fast fill system is provided. The fast fill system includes first and second high flow roll-over valves, each coupled to flexible tubes. The system includes a replacement fuel tank with first and second inserts on top. The high flow roll-over valves couple to the replacement fuel tank through the respective inserts. The valves with flexible tubes allow the replacement fuel tank to expel up to 400% more air when refueling than without them. This enables filling by high-flow truck stop pumps at rates of 25+ gallons per minute without pressure buildup or spillage.