A carbon canister includes a main body with a chamber containing activated carbon, an end cover mounted to the main body, the end cover and the main body enclosing and forming a cavity, the end cover having a desorption port for connecting with and engine, a Venturi tube mounted in the cavity and including an inlet segment, and a throat and a back suction tube. An inner diameter of the throat is smaller than an inner diameter of the inlet segment. The inlet segment communicates with the activated carbon containing chamber, the throat communicates with the desorption port, the back suction tube connects to the throat, and the back suction tube extends to the bottom of the cavity. Thereby, a negative pressure is created, the fuel collected within the carbon canister is desorbed to the engine so that the fuel utilization is improved, and the exhaust emission is reduced.

Three-port latching valves have a housing with a first port, a second port, and a third port in controlled fluid communication with one another by three, individually electronically controllable magnetically latching valves for a combination of five different flow options. Each valve has a solenoid with an armature movable between an open position and a closed position, a poppet valve connected to the armature, a permanent magnet fixedly seated at a position for magnetically latching the armature in the open position, and a spring positioned to bias the poppet valve closed when the armature is in the closed position. The spring has a pre-selected spring rate that mechanically relieves pressure if the spring rate is exceeded. The armature is movable to the open position after a pulse of voltage to the solenoid and is in an unpowered state after translation to either of the open position or the closed position.

A canister that adsorbs and desorbs an evaporated fuel generated in a fuel tank of a vehicle includes an outer case, an inner case, a connecting port, and a sealing member. The inner case has a cylindrical shape. The inner case is fitted into the outer case. The inner case is filled therein with an adsorbent in a granular form. The inner case includes a first end and a second end. The connecting port connects an inside and an outside of the outer case to each other. The sealing member is provided to the second end of the inner case located opposite to the first end leading to the connecting port. The sealing member seals a gap between the outer case and a joining portion of the inner case. The joining portion joins the inner case to the outer case.

An object is to provide an adsorbing material using activated carbon fiber, suitable for motor vehicle canisters, and enabling reduction in pressure loss. Another object is to provide a formed adsorber using activated carbon fiber, with improved mechanical strength, and having excellent effects of an adsorbing material for canisters. The formed adsorber for canisters satisfies the following conditions (1) to (3). (1) The formed adsorber includes: an adsorbing material including activated carbon fiber; and a binder. (2) A ratio of a content of the binder to a content of the adsorbing material including the activated carbon fiber is 0.3 to 20 parts by weight of the binder to 100 parts by weight of the adsorbing material including the activated carbon fiber. (3) The activated carbon fiber has a fiber size of 13.0 μm or larger.

An object is to provide a new form of formed adsorbers suitable for high performance canisters.

A formed adsorber for a canister is to satisfy the following conditions.

The formed adsorber satisfies a condition where P.sub.0.2/100 expressed by Equation 1:

P.sub.0.2/100=X÷Y×100  (Equation 1)

is 120% or less.

In Equation 1 above, X represents an amount of n-butane gas adsorbed per 100 parts by weight of the adsorbing material at 25° C. under an atmosphere where a gas pressure of n-butane gas is 0.2 kPa, and Y represents an amount of n-butane gas adsorbed per 100 parts by weight of the adsorbing material at 25° C. under an atmosphere where a gas pressure of n-butane gas is 100 kPa.

A fuel system for a vehicle includes a fuel evaporation gas treatment system configured to control fuel evaporation gas generated inside a fuel tank. The fuel evaporation gas treatment system includes: a gas collection chamber configured to store the fuel evaporation gas discharged from the canister through an atmosphere line connected to the canister; and an outlet of the gas collection chamber is connected to a purge line through a gas intake line so that the fuel evaporation gas stored in the gas collection chamber flows into an engine through the gas intake line and the purge line.

The present description provides high working capacity adsorbents with low DBL bleed emission performance properties that allows the design of evaporative fuel emission control systems that are lower cost, simpler and more compact than those possible by prior art. Emission control canister systems comprising the adsorbent material demonstrate a relatively high gasoline working capacity, and low emissions.

A controller controls a vehicle including an engine with a fuel vapor processing device. The fuel vapor processing device executes purge control that sends fuel vapor of a fuel tank, via a canister, to an intake passage on condition that air-fuel ratio learning is complete. The controller includes processing circuitry. The processing circuitry automatically stops the engine when an automatic stopping condition is satisfied, automatically starts the engine when an automatic starting condition is satisfied, determines that a prohibition condition for prohibiting automatic stopping is satisfied when the air-fuel ratio learning is incomplete, and inhibits automatic stopping of the engine even if the automatic stopping condition is satisfied when determining that the prohibition condition is satisfied.

Provided is a canister whose performance is enhanced while achieving the advantage of suppressing changes in temperature by using a heat storage material and overcoming the disadvantage of a reduction in the adsorption amount. A canister for treating evaporated fuel includes: a tank port that is in communication with an upper air chamber of a fuel tank of an internal combustion engine; a purge port that is in communication with an air intake path of the internal combustion engine; an atmospheric air port that is open to atmospheric air; and an adsorbent material chamber R that contains an activated carbon that adsorbs evaporated fuel that flows from the tank port to the atmospheric air port. A heat storage material is provided in a tank-side adjacent region T of the adsorbent material chamber R that is provided adjacent to the tank port, the heat storage material being a material obtained by encapsulating, into capsules, a phase change material that absorbs and releases latent heat according to changes in temperature.

A fuel vapor treatment system includes a plurality of adsorbent sections arranged in series and configured to adsorb fuel vapor, a tank port in fluid communication with a fuel tank, a purge port in fluid communication with an engine, an atmospheric port in fluid communication with a surrounding atmosphere, and a constriction plate disposed adjacent to an atmospheric side end of the adsorbent section of the plurality of adsorbent sections that is most proximal the atmospheric port. The constriction plate is positioned adjacent the adsorbent section without an intermediate space formed therebetween. The constriction plate has a plurality of through holes. The total cross-sectional area of the through holes in the constriction plate is smaller than a cross-sectional area of a flow passage in the atmospheric port.