Nissan Motor Company Limited

Takahiro Yamafuji

Yuji Itakura

Masaya Furushou

Yasuo Kouda

The present invention is accomplished by a canister structure for an internal combustion engine that includes a container having a gas passage therein through which gas containing evaporative fuel flows from a first end to a second end, a purge portion disposed on the container and connected to the first end through which vacuum pressure is applied into the gas passage, a charge portion disposed on the container and connected to the first end through which the gas is introduced into the gas passage, a drain portion disposed on the container and connected to the second end through which the gas passage is made open to the atmosphere, and an adsorbent material, disposed in the gas passage, to temporarily adsorb the evaporative fuel, whose specific heat on the side of the second end is made higher relative to that on the side of the first end.

Canister structure for internal combustion engine

An evaporation control apparatus is provided that reliably suppresses the emission of fuel components into the atmosphere. The evaporation control apparatus has a canister and a control valve that are configured as a unit to be disposed within the fuel tank so that the connection path between the canister and the control valve is completely enclosed within the fuel tank Therefore, fuel components are prevented from permeating the hoses and joints connecting the canister and the control valve In the unlikely event that fuel components should permeate the case body A of the control valve emission of the fuel components into the atmosphere will be suppressed.

Evaporation control apparatus

In an apparatus for controlling an internal combustion engine equipped with an evaporative emission control system comprises an electronic control unit configured to be connected to at least an electronically-controlled throttle and an electronic fuel injection system, the control unit comprises a desired air flow rate setting section setting a desired air flow rate on the basis of at least an opening of an accelerator, and a desired fuel-flow quantity setting section setting a desired quantity of fuel flow on the basis of the desired air flow rate and a predetermined air/fuel ratio. A purge gas flow detection section is provided for detecting a purge-air flow rate of purge air flowing through the purge line and a purge fuel-flow quantity of purge fuel vapor flowing through the purge line. A desired throttle air flow rate is arithmetically calculated by subtracting the purge-air flow rate from the desired air flow rate, whereas a desired fuel-injection quantity is arithmetically calculated by subtracting the purge fuel-flow quantity from the desired quantity of fuel flow. The opening of the electronically-controlled throttle is controlled on the basis of the desired throttle air flow rate, whereas the fuel-injection quantity of fuel to be injected from the fuel injector is controlled on the basis of the desired fuel-injection quantity.

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Yokohama, Japan

Takahiro Yamafuji