Methods and systems are provided for carrying out diagnostics of a bleed canister of an evaporative emissions control system in a vehicle. In one example, a method may include, loading the bleed canister during a refueling event, and then during an immediately subsequent engine start, detecting if the bleed canister is degraded or not based on output of an exhaust gas oxygen sensor.

An air filter assembly for a bicycle is disclosed. The air filter assembly includes a body having a bracket and a frame. The bracket is configured to mount to a bicycle frame. The frame defines a tapered opening having a windward side and a leeward side. The tapered opening is larger on the windward side than on the leeward side. A removable air filter cartridge is mounted within the opening of the frame such that a force acting on the air filter cartridge on the windward side tends to wedge the air filter cartridge in the opening. A foam member is attached to an outer periphery of the air filter cartridge and is disposed between the air filter cartridge and the frame. The foam member is compressible so as to hold the air filter cartridge in the opening of the frame. The foam member compresses to a greater degree on the leeward side of the opening than on the windward side of the opening. The air filter assembly is mountable to a handle bar of a bicycle.

A fuel tank system for a vehicle includes a fuel tank, a fuel supply passage, a canister, an evaporated fuel gas supply passage, a communication passage, a backflow prevention device, first and second pressure measurement devices, and a control device. The fuel tank stores fuel supplied by the fuel supply passage. The canister adsorbs evaporated fuel gas generated in the fuel tank and supplied through the evaporated fuel gas supply passage. The backflow prevention device is provided in a pipe line of the fuel supply passage, and prevents a backflow of the fuel from the fuel tank. The first and second pressure measurement devices respectively measure pressures in the fuel supply passage and the evaporated fuel gas supply passage. The control device diagnoses the communication passage as being blocked when a difference between pressure values measured by the first and second pressure measurement devices exceeds a predetermined value.

A portable oxygen concentrator designed for medical use where the sieve beds, adsorbers, are designed to be replaced by a patient. The concentrator is designed so that the beds are at least partially exposed to the outside of the system and can be easily released by a simple user-friendly mechanism. Replacement beds may be installed easily by patients, and all gas seals will function properly after installation.

An apparatus (10, 110, 210, 310) for the separation and recovery of CO.sub.2, from air, by a cyclic adsorption/desorption process using a loose particulate sorbent for gas adsorption. The apparatus has a plurality of adjacent, parallel, spaced-apart layers (24, 124, 224, 324), each having a stiff frame supporting a flexible, gas-permeable fabric enclosure for the sorbent. The gas inlet (14, 114, 214, 314) and outlet (18, 118, 216, 316) of the apparatus are on its axially opposite sides, and each layer (24, 124, 224, 324) extending axially within the apparatus. The recovered CO.sub.2 can be either supplied to an enclosed space, recycled to an enclosed space, from which the CO.sub.2 had been separated, or vented to the exterior of the latter enclosed space.

An indicator is provided in a vehicle for indicating necessity of change of a fuel vapor absorber in a venting line of a vehicle tank, especially a methanol tank for fuel cell vehicles.

A coated substrate (2a, 2b) adapted for hydrocarbon adsorption having at least one surface, and a coating on the at least one surface, the coating comprising particulate carbon and a binder, wherein the particulate carbon has a BET surface area of at least about 1300 m.sup.2/g; and at least one of: (i) a butane affinity of greater than 60% at 5% butane; (ii) a butane affinity of greater than 35% at 0.5% butane; (iii) a micropore volume greater than about 0.2 ml/g and a mesopore volume greater than about 0.5 ml/g. A bleed emission scrubber (1) and an evaporative emission control canister system (30) comprising the coated substrate (2a, 2b) are provided. They can control evaporative hydrocarbon emissions and may provide low diurnal breathing loss (DBL) emissions even under a low purge condition.

A filter assembly is disclosed that has a body defining a cavity and having a first side edge surface, a second side edge surface, a top edge surface, and a bottom edge surface forming a perimeter surface around the cavity. A porous flow face extends across the cavity and is coupled to the perimeter surface. The porous flow face arcs between the first side edge surface and the second side edge surface. An adsorbent is disposed in the cavity.

A canister, mounted in a vehicle with an engine and including one or more chambers, includes adsorbents, an inflow port, an atmosphere port, an outflow port, two or more adjusting portions, and one or more coupling portions. The two or more adjusting portions are elongated members placed in at least one target chamber of one or more chamber togethers, together with corresponding one adsorbent among the adsorbents to the target chamber. The one or more coupling portions couple the two or more adjusting portions to one another. Furthermore, the one or more coupling portions are provided to the two or more adjusting portions at a position distanced from end surfaces of the two or more adjusting portions.

A filter for a sorbent regeneration process includes a base, a central rod, support frames, and a filter screen. The central rod is coupled to the base and defines a longitudinal axis of the filter. Each of the support frames are coupled to and protrude radially from the central rod. Each of the support frames are coupled to the base. For each pair of neighboring support frames, the filter includes a triangular support member disposed between the pair of neighboring support frames. Each triangular member is coupled to the central rod and to each of the neighboring support frames. The filter screen surrounds the support frames and is coupled to the support frames and to the base.