Abstract: One aspect of the present teachings includes a separation membrane arranged in a hollow case. A particular component concentration chamber and a particular component dilution chamber are arranged in series in the hollow case. The particular component concentration chamber is capable of increasing concentration of the particular component by allowing permeation of the particular gas through the separation membrane. The particular component dilution chamber is capable of increasing concentration of the particular component by not allowing permeation of the particular gas through the separation membrane. The particular component concentration chamber and the particular component dilution chamber are configured such that only a gas containing the particular component and permeated through the separation membrane or only a gas containing the particular component not permeated through the separation membrane in one of the chambers disposed on an upstream side (i.e.

Abstract: A projection is formed on the upper edge of the side wall of a front cabinet, a depression is formed on the upper edge of the side wall of a front cover, and a protrusion is formed on the upper edge of the side wall of a rear cabinet. The front cabinet is supported between the front cover and the rear cabinet, such that the projection of the front cabinet is pressed against the depression of the front cover by the protrusion of the rear cabinet and the upper edge of the side wall thereof, and the projection of the front cabinet is locked by the depression of the front cover.

Abstract: An apparatus for checking leakage from a fuel vapor processing apparatus includes an interrupting device capable of interrupting communication between a canister and a fuel tank when a pressure within the canister is negative and a pressure within the fuel tank is positive. A first pressure detecting device can detect the pressure within the canister or its equivalent. A second pressure detecting device can detect the pressure within the fuel tank or its equivalent.

Abstract: A heating device may include an electric heating element configured to generate heat, a heat radiation element, and an electrical insulation member interposed between the electric heating element and the heat radiation element. The electrical insulation member may be bonded to both of the electric heating element and the heat radiation element.

Abstract: A fuel vapor processing apparatus includes a purge air supply device including separation device that can separate gas, which is introduced from within a fuel tank, into a fuel component and an air component. The air component is supplied into a canister for purging the canister.

Abstract: A fuel vapor processing device may include a casing having an adsorption chamber defined therein, an adsorption material disposed within the adsorption chamber, a heating device capable of heating the adsorption material, and a passage member communicating between the adsorption chamber and the atmosphere. The passage member defines a flow space facing to an outer circumferential surface of the casing, so that heat can be transmitted between the adsorption chamber and the flow space.

Abstract: A fuel vapor processor has a fuel tank, a canister, a vapor pipe, a recovery pipe, an air pipe, a suction device, a vapor pipe valve, an air pipe valve, and a pressure regulator. The vapor pipe leads fuel vapor generated in the fuel tank to the canister for trapping the fuel vapor in the canister. The recovery pipe recoveries the fuel vapor desorbed from the canister into the fuel tank. The air pipe communicates the canister with the atmosphere. The suction device is disposed on the recovery pipe for desorbing the fuel vapor trapped in the canister. The pressure regulator is communicated with the air pipe between the air pipe valve and the canister in order to allow gas flow from the atmosphere toward the canister. During desorption of the fuel vapor due to the suction device, the vapor pipe valve and the air pipe valve are closed, and negative pressure is kept in the canister such that the fuel vapor is desorbed from the canister and fresh air is led into the canister via the pressure regulator.

Abstract: A fuel tank system includes a fuel tank that has a tank wall defining a fuel storage space. A heat control chamber is formed within the tank wall. A pressure control device can control a pressure within the heat control chamber in response to a difference between a temperature within the fuel storage space and a temperature externally of the tank wall.

Abstract: One aspect according to the present teachings includes a fuel vapor processing device including a housing having a first port for introduction of fuel vapor, a second port for introduction of negative pressure, and a third port communicating with an atmosphere. An adsorption material is disposed within the housing. In a desorption mode, fuel vapor desorbed by the adsorption material is desorbed from the adsorption material as air flows into the housing via the third port and flows out of the second port. A plurality of heaters are disposed within the housing and are arranged along a path of flow of air from the third port to the second port in the adsorption mode. A controller controls the heaters such that the heaters start to heat the adsorption material in order of the air flow direction from the third port to the second port. The controller preferably also terminates heating of the adsorption material in the same manner.

Abstract: A fuel vapor recovery system has a fuel tank, an adsorbent canister, a separator capable of separating fuel vapor from air, and a negative pressure supplier applying negative pressure to the adsorbent canister in order to remove the fuel vapor from the adsorbent canister. The separator has a housing and a separation membrane. The separation membrane divides an inner space of the housing into a receiving chamber and a permeation chamber and is configured to allow the fuel vapor to pass therethrough. The separator is connected with the fuel tank such that the fuel tank is fluidly connected with the receiving chamber. The negative pressure supplier is fluidly connected with the adsorbent canister via the permeation chamber. When the negative pressure supplier applies negative pressure to the adsorbent canister, purge gas flows from the adsorbent canister into the fuel tank via the permeation chamber.

Abstract: An adsorbent canister has a housing defining an adsorption chamber therein, an adsorbent filled in the adsorption chamber, and a honeycomb core. The honeycomb core is made from a material having a higher thermal conductivity than the adsorbent, defines therein a plurality of cells passing through the honeycomb core and is disposed in the adsorption chamber. The adsorbent canister can further have a heater for heating the honeycomb core or the honeycomb core can be made from a material, which produce heat when current is applied.

Abstract: A method for detecting leak from a fuel vapor treating apparatus defining a first area including a fuel tank and a second area including an adsorbent canister has hermetically closing the fist area, measuring internal pressure of the first area comparing an absolute value of differential pressure between the internal pressure of the first area and the atmospheric pressure with a predetermined value, measuring the internal pressure of the first area in a case that the absolute value is equal to or higher than the predetermined value in order to check for leaks from the first area based on changes in the internal pressure of the first area, fluidly communicating the first area with the second area in order to equilibrate internal pressures of the first area and the second area, hermetically closing the second area, and measuring the internal pressure of the second area in order to check for leaks from the second area based on changes in the internal pressure of the second area.

Abstract: A fuel vapor processor has a fuel tank configured to reserve fuel, a canister containing adsorbent capable of adsorbing fuel vapor vaporized in the fuel tank, a separator receiving a fuel vapor containing gas from the fuel tank, a regulator controlling the volume of the fuel vapor containing gas supplied to the separator, and a suction unit capable of removing the fuel vapor from the canister. The separator selectively passes the fuel vapor therethrough in order to divide the fuel vapor containing gas into a first gas mainly containing the fuel vapor and a second gas having a fuel vapor density lower than the first gas. The suction unit suctions the first gas from the separator in order to return the first gas into the fuel tank. The second gas is introduced into the canister or is released into the atmosphere.

Abstract: A canister, for inhibiting a diffusion phenomenon in an adsorbent layer as much as possible and certainly adsorbing fed evaporated fuel to inhibit blow-by of the evaporated fuel into the atmosphere, is constituted by filling a first adsorbent layer of the canister with activated carbon A having a large evaporated fuel adsorption and a weak holding power, and filling a second and a third adsorbent layers with activated carbon B having an intermediate evaporated fuel adsorption and a weak holding power and therefore having characteristics that the residual amount of the low boiling point components in the evaporated fuel after purge is small, whereby after the high temperature standing of the canister, the discharge of the evaporated fuel into the atmosphere can be inhibited.

Abstract: A leakage diagnosis device can determine whether or not leakage occurs from a fuel vapor processing apparatus by comparing a diagnosis criterion, such as a reference pressure set for diagnosing leakage, with an internal pressure of a process system of the fuel vapor processing apparatus during application of a negative or positive pressure to the process system. The diagnosis criterion has a device that can correct the diagnosis criterion based on a fuel vapor pressure within the process system.

Abstract: A fuel vapor processor has a fuel tank, a canister, a vapor pipe, a recovery pipe, an air pipe, a suction device, a vapor pipe valve, an air pipe valve, and a pressure regulator. The vapor pipe leads fuel vapor generated in the fuel tank to the canister for trapping the fuel vapor in the canister. The recovery pipe recoveries the fuel vapor desorbed from the canister into the fuel tank. The air pipe communicates the canister with the atmosphere. The suction device is disposed on the recovery pipe for desorbing the fuel vapor trapped in the canister. The pressure regulator is communicated with the air pipe between the air pipe valve and the canister in order to allow gas flow from the atmosphere toward the canister. During desorption of the fuel vapor due to the suction device, the vapor pipe valve and the air pipe valve are closed, and negative pressure is kept in the canister such that the fuel vapor is desorbed from the canister and fresh air is led into the canister via the pressure regulator.

Abstract: A fuel vapor processor has a fuel tank, a canister, a recovery pipe, a fuel pump, a negative pressure generator, a pressure regulator, a fuel intake pipe and a fuel intake regulator. The vapor pipe leads the fuel vapor generated in the fuel tank into the canister for trapping the fuel vapor. The recovery pipe connects the fuel tank and the canister for recovering the fuel vapor trapped in the canister into the fuel tank. The fuel intake pipe directly connects the fuel pump provided in the fuel tank with the negative pressure generator for leading fuel to the negative pressure generator. The negative pressure generator generates negative pressure depending on an amount of fuel supplied to the negative pressure generator from the fuel pump. The fuel vapor trapped in the canister is recovered to the fuel tank through the recovery pipe due to the negative pressure. The pressure regulator is connected with the fuel pump for returning excess fuel discharged from the fuel pump into the fuel tank.

Abstract: A fuel vapor processing apparatus includes a device that can restrict or prevent flow of gas from a vapor passage into a canister during recovering of fuel vapor from the canister into a fuel tank.

Abstract: A fuel vapor processing apparatus includes a purge air supply device including separation device that can separate gas, which is introduced from within a fuel tank, into a fuel component and an air component. The air component is supplied into a canister for purging the canister.

Abstract: An apparatus for checking leakage from a fuel vapor processing apparatus includes an interrupting device capable of interrupting communication between a canister and a fuel tank when a pressure within the canister is negative and a pressure within the fuel tank is positive. A first pressure detecting device can detect the pressure within the canister or its equivalent. A second pressure detecting device can detect the pressure within the fuel tank or its equivalent.