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Evaporated fuel processing device

A technology of evaporative fuel and processing device, which is applied in the field of evaporative fuel processing device, can solve problems such as abnormal gas noise, and achieve the effect of suppressing abnormal noise

Active Publication Date: 2018-02-23
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, a relatively large solenoid valve is used for the shutoff valve in order to carry out smooth fuel supply. Therefore, if the shutoff valve is opened when the fuel tank becomes negative pressure as in Patent Document 1, the gas flows rapidly toward the fuel tank, and as a result , Abnormal noise is generated along with the rapid pressure fluctuation and gas flow in the fuel tank

Method used

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  • Evaporated fuel processing device

Examples

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Embodiment Construction

[0021] figure 1 It is an explanatory diagram showing the configuration of an embodiment of the evaporated fuel processing device of the present invention. An internal combustion engine 1 is mounted on a vehicle not shown in the figure, and an airtight fuel tank 2 is installed. In order to process the evaporated fuel generated in the fuel tank 2 during refueling, an evaporated fuel using a canister 3 is installed. Processing device. The above-mentioned fuel tank 2 is provided with a fuel supply pipe portion 5 for detachably attaching and fixing the filler hole cover 4 at the fuel supply port 5a at the top end, and also houses a fuel pump unit 7 for supplying fuel to the fuel injection device 6 of the internal combustion engine 1. Inside the fuel tank 2. The fuel supply port 5 a is covered with an electrically locked fuel cap 8 in order to restrict the opening of the filler cap 4 in a state where the pressure in the fuel tank 2 is high. The fuel cap 8 is unlocked in a state ...

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Abstract

The invention discloses an evaporated fuel processing device. This evaporated fuel processing device is provided with: an evaporated fuel passage (16) through which a fuel tank (2) and a canister (3)communicate with each other; a blocking valve (21) opening / closing the evaporated fuel passage (16); a purge passage (19) through which the canister (3) and an intake passage (17) of an internal combustion engine (1) communicate with each other; a first purge control valve (23) opening / closing the purge passage (19); a tank opening passage (31) through which an upstream side position from the first purge control valve (23) in the purge passage (19) and the fuel tank (2) communicate with each other; and a second purge control valve (32) opening / closing the tank opening passage (31). When a negative pressure is formed in the fuel tank (2), the second purge control valve (32) is opened, thereby introducing atmospheric pressure through the canister (3).

Description

Technical field [0001] The present invention relates to an evaporative fuel treatment device that uses an adsorption canister to process evaporated fuel generated in a fuel tank during fuel supply. In particular, it relates to a so-called sealed fuel tank in which a closing valve is provided between the fuel tank and the adsorption canister. Evaporative fuel handling unit. Background technology [0002] An evaporated fuel treatment device has been widely used in the past. In this evaporated fuel treatment device, in order to prevent the evaporated fuel generated in the fuel tank of the vehicle from flowing out to the outside, the evaporated fuel is temporarily adsorbed on an adsorbent using an adsorbent such as activated carbon. After that, during the operation of the internal combustion engine, due to the introduction of fresh air, the fuel components are purged from the adsorption can and introduced into the intake system of the internal combustion engine. In addition, in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M25/08
CPCF02M25/08B60K15/035F02M25/0818F02M25/0836F02M25/0872F02M25/089F02M2025/0845B60K15/03519B60K2015/03302
Inventor 渡边一央丰田一树大桥仁
Owner NISSAN MOTOR CO LTD
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