Aisan Kogyo Kabushiki Kaisha

Toyota Jidosha Kabushiki Kaisha

Aisan Industry Co., Ltd.

Kazumi Haruta

Yutaka Yamada

Takashi Kato

Kenji Koeda

Takashi Nagai

Shigeru Yoshida

Ituo Koga

Kiyoshi Isogai

Hideo Yamada

Satoru Ikeda

Yoshihiro Yasuda

A fuel cutoff valve has a housing defining therein a float chamber and a float disposed in the float chamber. The housing defines a connection passage positioned above the float chamber and fluidly connecting the float chamber with outside of the housing and a hole positioned below the fluid chamber fluidly connecting the float chamber with outside of the housing. The float has a valve part that is configured to close the connection passage and defines therein a first passage passing through the float in a vertical direction and a second passage extending from a part of the first passage to an outer surface of the float in a substantial horizontal direction.

Fuel cutoff valves

In order to reduce a discharge amount of an evaporated fuel to the atmosphere and make it possible to manufacture an automobile in accordance with a module production, in a canister module, a fill check valve, a cut off valve, a positive and negative pressure check valve and the like are previously assembled in a module main body in an integral manner and the canister module is covered with a cover portion of a canister case having an absorbent storage chamber on an evaporated fuel outlet side and the cover portion is welded to a module main body so as to keep an airtight condition, thereby forming a passage portion surrounded by the cover portion and the module main body. Accordingly, a rubber hose is omitted and a transmitting amount of the evaporated fuel to the atmosphere is reduced.

Canister module

A canister in which a supplying conduit is disposed at a position to penetrate through layers of an absorbent, includes a casing made of resin which includes a peripheral wall and a bottom integrally formed on the lower surface of the peripheral wall, and is opened at the top, a conduit support portion formed on the inner surface of the bottom, the supplying conduit secured in the conduit support portion and extended upright, and a top cover made of resin which is welded on an upper end portion of the casing. A purge port is attached to the top cover and has a recess into which the supplying conduit is inserted. The supplying conduit is dimensioned so that it creates a circumferential gap between the recess and the upper portion of the supplying conduit.

Canister for an evaporated fuel processing device of an automobile

An apparatus is provided for preventing emission of fuel vapor generated in a fuel tank during fuel supply, including a fuel supplying canister for absorbing the fuel vapor and desorbing the absorbed fuel vapor by an intake air flow in the operation of an internal combustion engine. The fuel supplying canister is provided, on one side of its vessel, with a tank port connected to the fuel tank and a purge port connected to an air intake passage of the internal combustion engine, and also provided with an atmospheric air port for introducing air on the other side thereof. The atmospheric air port includes a switching device for controlling the cross-sectional area of an atmospheric air passage in a manner that the switching device is fully opened during fuel supply, and that at other times a predetermined restriction hole is defined therein. Owing to this structure, the intake pipe negative pressure in the internal combustion engine can be efficiently applied into the canister without degrading the fuel supplying efficiency, so that the desorption of the fuel vapor absorbed in the activated carbon of the canister during fuel supply is much improved. Moreover, the residual fuel vapor in the activated carbon becomes less, and consequently, the lowering or degradation of absorption efficiency of the activated carbon because of aged deterioration can be prevented.

Evaporative emission control system

A canister for adsorption of evaporated fuel in an automobile. The canister operates to decrease leakage of the evaporated fuel when the atmosphere temperature rises or the canister is left as it is for a long time. To this end, the canister according to the invention comprises a first container provided in adjacent to an inlet for evaporated fuel and incorporating therein a liquid-phase component adsorbent, a second container provided on the downstream of the first container and on the side or the top of the first container and filled with an adsorbent, and a third container disposed between the second container and an atmosphere port and filled with an adsorbent. Further, the first, second and third container are integrally formed. With such structure, liquid-phase components of the evaporated fuel are collected by the adsorbent in the first container so that a life span of the adsorbent in the second container can be elongated. Further, since the third container is filled with the adsorbent, the evaporated fuel forcibly discharged from the adsorbent of the second container is collected by the adsorbent in the third container when the atmosphere temperature rises or the canister is left for a long time. Therefore, the evaporated fuel can be prevented from being discharged into the atmosphere.

Canister for adsorbing evaporated fuel

A canister device is used to collect fuel vapors generated in a vapor space within a gasoline tank and those generated in a filler neck thereof while the tank is being filled in a vapor absorbing material accommodated therein. The accumulated fuel vapors are purged from the canister utilizing the source of vacuum generated in an intake manifold while the engine is running. The canister device includes a casing accommodating a vapor absorbing material layer, a first intake port provided at the intermediate portion of the casing and communicating with the vapor space in the fuel tank, a second intake port provided in one side wall of the casing and communicating with the interior of the filler neck of the fuel tank, an air port provided on the other side wall of the casing and opened into air ambient the casing, and a purge port communicating with the source of vacuum and positioned at a location or two of the casing such that the air flowing into the canister through the air port is discharged through the vapor absorbing material layer.

Canister device for use in gasoline tank

The invention relates to a horizontally mounted canister having a evaporated fuel supply port and a purge port provided on one side of an absorber chamber therein, an atmospheric air port provided on the other side thereof, a movable tray pushing one side surface of the absorber, and an additional absorber chamber which projects upward at the top and which is provided in the absorber chamber.

Canister for capturing evaporated fuel

A canister for absorbing fuel vapors includes a vapor-absorbing adsorbent layer contained in a cylindrical, laterally-mounted casing, an intake port and a purge port which are provided at one side of the adsorbent material layer, an air port provided at the other side of the adsorbent layer, fixed filters and perforated retaining plates for retaining the two sides of the vapor absorbing material layer, and a device for preventing a space from occurring in the adsorbent layer, the device being provided in an upper wall portion of the casing and including a tubular guide having a lower end opening into the adsorbent layer, a plunger fitted into the guide slidably in the vertical direction, and a spring for urging the plunger downward.

Canister for adsorbing fuel vapors

A canister for adsorbing fuel vapor overflowing a fuel tank of an internal combustion engine and purging adsorbed vapor under a negative pressure of the suction system of the internal combustion engine so as to supply this adsorbed vapor for the combustion, the canister having a deflector for spirally diffusing introduced fuel vapor throughout the adsorbent layers of the canister, and another deflector having apertures for diffusing introduced purging air throughout the adsorbent layers.

Canister for reducing fuel vapor loss

A system for reducing discharge of fuel vapor from a fuel tank of an internal combustion engine to the atmosphere. The system has only one canister which is connected at one side to a top portion of the tank and to the neck of the refueling opening portion of the tank by separate channels, and which is connected at its other side to a suction system of the engine by a purge channel. The system also has three-way electromagnetic valves which are respectively disposed in the channel connected to the neck of the refueling opening portion and in the purge channel, thereby controlling the flows of fuel vapor and purging air.

System for reducing discharge of fuel vapor from fuel tank to atmosphere

A helically-shaped intake port comprising a helical portion formed around an intake valve, and a substantially straight inlet passage portion tangentially connected to the helical portion. A bypass passage is branched off from the inlet passage portion and connected to the helical portion. A rotary valve is arranged in the bypass passage and actuated by a vacuum operated diaphragm apparatus. The rotary valve is opened when the amount of air fed into the cylinder of an engine is increased beyond a predetermined value. The diaphragm apparatus comprises a diaphragm and a control rod interconnecting the diaphragm to the rotary valve. A first stop and a second stop, which are engageable with the housing of the diaphragm apparatus, are fixed onto the control rod for retaining the rotary valve at the full open position and at the completely closed position, respectively.

Growing community of inventors

Obu, Japan

Kazumi Haruta